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-rw-r--r--arch/x86/kernel/acpi/boot.c5
-rw-r--r--arch/x86/kernel/aperture_64.c10
-rw-r--r--arch/x86/kernel/apic/apic.c2
-rw-r--r--arch/x86/kernel/apic/apic_noop.c2
-rw-r--r--arch/x86/kernel/apic/probe_32.c2
-rw-r--r--arch/x86/kernel/apic/x2apic_uv_x.c1
-rw-r--r--arch/x86/kernel/cpu/centaur.c2
-rw-r--r--arch/x86/kernel/cpu/mtrr/cleanup.c6
-rw-r--r--arch/x86/kernel/cpu/mtrr/main.c2
-rw-r--r--arch/x86/kernel/crash.c23
-rw-r--r--arch/x86/kernel/e820.c1054
-rw-r--r--arch/x86/kernel/early-quirks.c4
-rw-r--r--arch/x86/kernel/head32.c2
-rw-r--r--arch/x86/kernel/head64.c2
-rw-r--r--arch/x86/kernel/head_64.S10
-rw-r--r--arch/x86/kernel/kexec-bzimage64.c18
-rw-r--r--arch/x86/kernel/mpparse.c6
-rw-r--r--arch/x86/kernel/probe_roms.c2
-rw-r--r--arch/x86/kernel/resource.c8
-rw-r--r--arch/x86/kernel/setup.c78
-rw-r--r--arch/x86/kernel/smp.c3
-rw-r--r--arch/x86/kernel/tboot.c16
-rw-r--r--arch/x86/kernel/x86_init.c4
23 files changed, 623 insertions, 639 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 70854988a963..6bb680671088 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -37,6 +37,7 @@
#include <linux/pci.h>
#include <linux/efi-bgrt.h>
+#include <asm/e820/api.h>
#include <asm/irqdomain.h>
#include <asm/pci_x86.h>
#include <asm/pgtable.h>
@@ -1723,6 +1724,6 @@ int __acpi_release_global_lock(unsigned int *lock)
void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
{
- e820_add_region(addr, size, E820_ACPI);
- update_e820();
+ e820__range_add(addr, size, E820_TYPE_ACPI);
+ e820__update_table_print();
}
diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
index 0a2bb1f62e72..ef2859f9fcce 100644
--- a/arch/x86/kernel/aperture_64.c
+++ b/arch/x86/kernel/aperture_64.c
@@ -21,7 +21,7 @@
#include <linux/pci.h>
#include <linux/bitops.h>
#include <linux/suspend.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/io.h>
#include <asm/iommu.h>
#include <asm/gart.h>
@@ -306,13 +306,13 @@ void __init early_gart_iommu_check(void)
fix = 1;
if (gart_fix_e820 && !fix && aper_enabled) {
- if (e820_any_mapped(aper_base, aper_base + aper_size,
- E820_RAM)) {
+ if (e820__mapped_any(aper_base, aper_base + aper_size,
+ E820_TYPE_RAM)) {
/* reserve it, so we can reuse it in second kernel */
pr_info("e820: reserve [mem %#010Lx-%#010Lx] for GART\n",
aper_base, aper_base + aper_size - 1);
- e820_add_region(aper_base, aper_size, E820_RESERVED);
- update_e820();
+ e820__range_add(aper_base, aper_size, E820_TYPE_RESERVED);
+ e820__update_table_print();
}
}
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 875091d4609d..847650b14558 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -2631,7 +2631,7 @@ static int __init lapic_insert_resource(void)
}
/*
- * need call insert after e820_reserve_resources()
+ * need call insert after e820__reserve_resources()
* that is using request_resource
*/
late_initcall(lapic_insert_resource);
diff --git a/arch/x86/kernel/apic/apic_noop.c b/arch/x86/kernel/apic/apic_noop.c
index b109e4389c92..2262eb6df796 100644
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -26,7 +26,7 @@
#include <linux/interrupt.h>
#include <asm/acpi.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
static void noop_init_apic_ldr(void) { }
static void noop_send_IPI(int cpu, int vector) { }
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
index c48264e202fd..2e8f7f048f4f 100644
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -25,7 +25,7 @@
#include <linux/interrupt.h>
#include <asm/acpi.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#ifdef CONFIG_HOTPLUG_CPU
#define DEFAULT_SEND_IPI (1)
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 86f20cc0a65e..b487b3a01615 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -34,6 +34,7 @@
#include <asm/uv/bios.h>
#include <asm/uv/uv.h>
#include <asm/apic.h>
+#include <asm/e820/api.h>
#include <asm/ipi.h>
#include <asm/smp.h>
#include <asm/x86_init.h>
diff --git a/arch/x86/kernel/cpu/centaur.c b/arch/x86/kernel/cpu/centaur.c
index 43955ee6715b..44207b71fee1 100644
--- a/arch/x86/kernel/cpu/centaur.c
+++ b/arch/x86/kernel/cpu/centaur.c
@@ -3,7 +3,7 @@
#include <linux/sched/clock.h>
#include <asm/cpufeature.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/mtrr.h>
#include <asm/msr.h>
diff --git a/arch/x86/kernel/cpu/mtrr/cleanup.c b/arch/x86/kernel/cpu/mtrr/cleanup.c
index 3b442b64c72d..765afd599039 100644
--- a/arch/x86/kernel/cpu/mtrr/cleanup.c
+++ b/arch/x86/kernel/cpu/mtrr/cleanup.c
@@ -27,7 +27,7 @@
#include <linux/range.h>
#include <asm/processor.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/mtrr.h>
#include <asm/msr.h>
@@ -860,7 +860,7 @@ real_trim_memory(unsigned long start_pfn, unsigned long limit_pfn)
trim_size <<= PAGE_SHIFT;
trim_size -= trim_start;
- return e820_update_range(trim_start, trim_size, E820_RAM, E820_RESERVED);
+ return e820__range_update(trim_start, trim_size, E820_TYPE_RAM, E820_TYPE_RESERVED);
}
/**
@@ -978,7 +978,7 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
WARN_ON(1);
pr_info("update e820 for mtrr\n");
- update_e820();
+ e820__update_table_print();
return 1;
}
diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index 24e87e74990d..2bce84d91c2b 100644
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -48,7 +48,7 @@
#include <linux/syscore_ops.h>
#include <asm/cpufeature.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/mtrr.h>
#include <asm/msr.h>
#include <asm/pat.h>
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 3741461c63a0..22217ece26c8 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -29,6 +29,7 @@
#include <asm/nmi.h>
#include <asm/hw_irq.h>
#include <asm/apic.h>
+#include <asm/e820/types.h>
#include <asm/io_apic.h>
#include <asm/hpet.h>
#include <linux/kdebug.h>
@@ -503,16 +504,16 @@ static int prepare_elf_headers(struct kimage *image, void **addr,
return ret;
}
-static int add_e820_entry(struct boot_params *params, struct e820entry *entry)
+static int add_e820_entry(struct boot_params *params, struct e820_entry *entry)
{
unsigned int nr_e820_entries;
nr_e820_entries = params->e820_entries;
- if (nr_e820_entries >= E820MAX)
+ if (nr_e820_entries >= E820_MAX_ENTRIES_ZEROPAGE)
return 1;
- memcpy(&params->e820_map[nr_e820_entries], entry,
- sizeof(struct e820entry));
+ memcpy(&params->e820_table[nr_e820_entries], entry,
+ sizeof(struct e820_entry));
params->e820_entries++;
return 0;
}
@@ -521,7 +522,7 @@ static int memmap_entry_callback(u64 start, u64 end, void *arg)
{
struct crash_memmap_data *cmd = arg;
struct boot_params *params = cmd->params;
- struct e820entry ei;
+ struct e820_entry ei;
ei.addr = start;
ei.size = end - start + 1;
@@ -560,7 +561,7 @@ int crash_setup_memmap_entries(struct kimage *image, struct boot_params *params)
{
int i, ret = 0;
unsigned long flags;
- struct e820entry ei;
+ struct e820_entry ei;
struct crash_memmap_data cmd;
struct crash_mem *cmem;
@@ -574,17 +575,17 @@ int crash_setup_memmap_entries(struct kimage *image, struct boot_params *params)
/* Add first 640K segment */
ei.addr = image->arch.backup_src_start;
ei.size = image->arch.backup_src_sz;
- ei.type = E820_RAM;
+ ei.type = E820_TYPE_RAM;
add_e820_entry(params, &ei);
/* Add ACPI tables */
- cmd.type = E820_ACPI;
+ cmd.type = E820_TYPE_ACPI;
flags = IORESOURCE_MEM | IORESOURCE_BUSY;
walk_iomem_res_desc(IORES_DESC_ACPI_TABLES, flags, 0, -1, &cmd,
memmap_entry_callback);
/* Add ACPI Non-volatile Storage */
- cmd.type = E820_NVS;
+ cmd.type = E820_TYPE_NVS;
walk_iomem_res_desc(IORES_DESC_ACPI_NV_STORAGE, flags, 0, -1, &cmd,
memmap_entry_callback);
@@ -592,7 +593,7 @@ int crash_setup_memmap_entries(struct kimage *image, struct boot_params *params)
if (crashk_low_res.end) {
ei.addr = crashk_low_res.start;
ei.size = crashk_low_res.end - crashk_low_res.start + 1;
- ei.type = E820_RAM;
+ ei.type = E820_TYPE_RAM;
add_e820_entry(params, &ei);
}
@@ -609,7 +610,7 @@ int crash_setup_memmap_entries(struct kimage *image, struct boot_params *params)
if (ei.size < PAGE_SIZE)
continue;
ei.addr = cmem->ranges[i].start;
- ei.type = E820_RAM;
+ ei.type = E820_TYPE_RAM;
add_e820_entry(params, &ei);
}
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index b2bbad6ebe4d..6e9b26fa6d05 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -1,49 +1,55 @@
/*
- * Handle the memory map.
- * The functions here do the job until bootmem takes over.
+ * Low level x86 E820 memory map handling functions.
*
- * Getting sanitize_e820_map() in sync with i386 version by applying change:
- * - Provisions for empty E820 memory regions (reported by certain BIOSes).
- * Alex Achenbach <xela@slit.de>, December 2002.
- * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
+ * The firmware and bootloader passes us the "E820 table", which is the primary
+ * physical memory layout description available about x86 systems.
*
+ * The kernel takes the E820 memory layout and optionally modifies it with
+ * quirks and other tweaks, and feeds that into the generic Linux memory
+ * allocation code routines via a platform independent interface (memblock, etc.).
*/
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/init.h>
#include <linux/crash_dump.h>
-#include <linux/export.h>
#include <linux/bootmem.h>
-#include <linux/pfn.h>
#include <linux/suspend.h>
#include <linux/acpi.h>
#include <linux/firmware-map.h>
#include <linux/memblock.h>
#include <linux/sort.h>
-#include <asm/e820.h>
-#include <asm/proto.h>
+#include <asm/e820/api.h>
#include <asm/setup.h>
-#include <asm/cpufeature.h>
/*
- * The e820 map is the map that gets modified e.g. with command line parameters
- * and that is also registered with modifications in the kernel resource tree
- * with the iomem_resource as parent.
+ * We organize the E820 table into two main data structures:
*
- * The e820_saved is directly saved after the BIOS-provided memory map is
- * copied. It doesn't get modified afterwards. It's registered for the
- * /sys/firmware/memmap interface.
+ * - 'e820_table_firmware': the original firmware version passed to us by the
+ * bootloader - not modified by the kernel. We use this to:
*
- * That memory map is not modified and is used as base for kexec. The kexec'd
- * kernel should get the same memory map as the firmware provides. Then the
- * user can e.g. boot the original kernel with mem=1G while still booting the
- * next kernel with full memory.
+ * - inform the user about the firmware's notion of memory layout
+ * via /sys/firmware/memmap
+ *
+ * - the hibernation code uses it to generate a kernel-independent MD5
+ * fingerprint of the physical memory layout of a system.
+ *
+ * - kexec, which is a bootloader in disguise, uses the original E820
+ * layout to pass to the kexec-ed kernel. This way the original kernel
+ * can have a restricted E820 map while the kexec()-ed kexec-kernel
+ * can have access to full memory - etc.
+ *
+ * - 'e820_table': this is the main E820 table that is massaged by the
+ * low level x86 platform code, or modified by boot parameters, before
+ * passed on to higher level MM layers.
+ *
+ * Once the E820 map has been converted to the standard Linux memory layout
+ * information its role stops - modifying it has no effect and does not get
+ * re-propagated. So itsmain role is a temporary bootstrap storage of firmware
+ * specific memory layout data during early bootup.
*/
-static struct e820map initial_e820 __initdata;
-static struct e820map initial_e820_saved __initdata;
-struct e820map *e820 __refdata = &initial_e820;
-struct e820map *e820_saved __refdata = &initial_e820_saved;
+static struct e820_table e820_table_init __initdata;
+static struct e820_table e820_table_firmware_init __initdata;
+
+struct e820_table *e820_table __refdata = &e820_table_init;
+struct e820_table *e820_table_firmware __refdata = &e820_table_firmware_init;
/* For PCI or other memory-mapped resources */
unsigned long pci_mem_start = 0xaeedbabe;
@@ -55,51 +61,53 @@ EXPORT_SYMBOL(pci_mem_start);
* This function checks if any part of the range <start,end> is mapped
* with type.
*/
-int
-e820_any_mapped(u64 start, u64 end, unsigned type)
+bool e820__mapped_any(u64 start, u64 end, enum e820_type type)
{
int i;
- for (i = 0; i < e820->nr_map; i++) {
- struct e820entry *ei = &e820->map[i];
+ for (i = 0; i < e820_table->nr_entries; i++) {
+ struct e820_entry *entry = &e820_table->entries[i];
- if (type && ei->type != type)
+ if (type && entry->type != type)
continue;
- if (ei->addr >= end || ei->addr + ei->size <= start)
+ if (entry->addr >= end || entry->addr + entry->size <= start)
continue;
return 1;
}
return 0;
}
-EXPORT_SYMBOL_GPL(e820_any_mapped);
+EXPORT_SYMBOL_GPL(e820__mapped_any);
/*
- * This function checks if the entire range <start,end> is mapped with type.
+ * This function checks if the entire <start,end> range is mapped with 'type'.
*
- * Note: this function only works correct if the e820 table is sorted and
- * not-overlapping, which is the case
+ * Note: this function only works correctly once the E820 table is sorted and
+ * not-overlapping (at least for the range specified), which is the case normally.
*/
-int __init e820_all_mapped(u64 start, u64 end, unsigned type)
+bool __init e820__mapped_all(u64 start, u64 end, enum e820_type type)
{
int i;
- for (i = 0; i < e820->nr_map; i++) {
- struct e820entry *ei = &e820->map[i];
+ for (i = 0; i < e820_table->nr_entries; i++) {
+ struct e820_entry *entry = &e820_table->entries[i];
- if (type && ei->type != type)
+ if (type && entry->type != type)
continue;
- /* is the region (part) in overlap with the current region ?*/
- if (ei->addr >= end || ei->addr + ei->size <= start)
+
+ /* Is the region (part) in overlap with the current region? */
+ if (entry->addr >= end || entry->addr + entry->size <= start)
continue;
- /* if the region is at the beginning of <start,end> we move
- * start to the end of the region since it's ok until there
+ /*
+ * If the region is at the beginning of <start,end> we move
+ * 'start' to the end of the region since it's ok until there
*/
- if (ei->addr <= start)
- start = ei->addr + ei->size;
+ if (entry->addr <= start)
+ start = entry->addr + entry->size;
+
/*
- * if start is now at or beyond end, we're done, full
- * coverage
+ * If 'start' is now at or beyond 'end', we're done, full
+ * coverage of the desired range exists:
*/
if (start >= end)
return 1;
@@ -108,94 +116,77 @@ int __init e820_all_mapped(u64 start, u64 end, unsigned type)
}
/*
- * Add a memory region to the kernel e820 map.
+ * Add a memory region to the kernel E820 map.
*/
-static void __init __e820_add_region(struct e820map *e820x, u64 start, u64 size,
- int type)
+static void __init __e820__range_add(struct e820_table *table, u64 start, u64 size, enum e820_type type)
{
- int x = e820x->nr_map;
+ int x = table->nr_entries;
- if (x >= ARRAY_SIZE(e820x->map)) {
- printk(KERN_ERR "e820: too many entries; ignoring [mem %#010llx-%#010llx]\n",
- (unsigned long long) start,
- (unsigned long long) (start + size - 1));
+ if (x >= ARRAY_SIZE(table->entries)) {
+ pr_err("e820: too many entries; ignoring [mem %#010llx-%#010llx]\n", start, start + size - 1);
return;
}
- e820x->map[x].addr = start;
- e820x->map[x].size = size;
- e820x->map[x].type = type;
- e820x->nr_map++;
+ table->entries[x].addr = start;
+ table->entries[x].size = size;
+ table->entries[x].type = type;
+ table->nr_entries++;
}
-void __init e820_add_region(u64 start, u64 size, int type)
+void __init e820__range_add(u64 start, u64 size, enum e820_type type)
{
- __e820_add_region(e820, start, size, type);
+ __e820__range_add(e820_table, start, size, type);
}
-static void __init e820_print_type(u32 type)
+static void __init e820_print_type(enum e820_type type)
{
switch (type) {
- case E820_RAM:
- case E820_RESERVED_KERN:
- printk(KERN_CONT "usable");
- break;
- case E820_RESERVED:
- printk(KERN_CONT "reserved");
- break;
- case E820_ACPI:
- printk(KERN_CONT "ACPI data");
- break;
- case E820_NVS:
- printk(KERN_CONT "ACPI NVS");
- break;
- case E820_UNUSABLE:
- printk(KERN_CONT "unusable");
- break;
- case E820_PMEM:
- case E820_PRAM:
- printk(KERN_CONT "persistent (type %u)", type);
- break;
- default:
- printk(KERN_CONT "type %u", type);
- break;
+ case E820_TYPE_RAM: /* Fall through: */
+ case E820_TYPE_RESERVED_KERN: pr_cont("usable"); break;
+ case E820_TYPE_RESERVED: pr_cont("reserved"); break;
+ case E820_TYPE_ACPI: pr_cont("ACPI data"); break;
+ case E820_TYPE_NVS: pr_cont("ACPI NVS"); break;
+ case E820_TYPE_UNUSABLE: pr_cont("unusable"); break;
+ case E820_TYPE_PMEM: /* Fall through: */
+ case E820_TYPE_PRAM: pr_cont("persistent (type %u)", type); break;
+ default: pr_cont("type %u", type); break;
}
}
-void __init e820_print_map(char *who)
+void __init e820__print_table(char *who)
{
int i;
- for (i = 0; i < e820->nr_map; i++) {
- printk(KERN_INFO "%s: [mem %#018Lx-%#018Lx] ", who,
- (unsigned long long) e820->map[i].addr,
- (unsigned long long)
- (e820->map[i].addr + e820->map[i].size - 1));
- e820_print_type(e820->map[i].type);
- printk(KERN_CONT "\n");
+ for (i = 0; i < e820_table->nr_entries; i++) {
+ pr_info("%s: [mem %#018Lx-%#018Lx] ", who,
+ e820_table->entries[i].addr,
+ e820_table->entries[i].addr + e820_table->entries[i].size - 1);
+
+ e820_print_type(e820_table->entries[i].type);
+ pr_cont("\n");
}
}
/*
- * Sanitize the BIOS e820 map.
+ * Sanitize an E820 map.
*
- * Some e820 responses include overlapping entries. The following
- * replaces the original e820 map with a new one, removing overlaps,
+ * Some E820 layouts include overlapping entries. The following
+ * replaces the original E820 map with a new one, removing overlaps,
* and resolving conflicting memory types in favor of highest
* numbered type.
*
- * The input parameter biosmap points to an array of 'struct
- * e820entry' which on entry has elements in the range [0, *pnr_map)
- * valid, and which has space for up to max_nr_map entries.
- * On return, the resulting sanitized e820 map entries will be in
- * overwritten in the same location, starting at biosmap.
+ * The input parameter 'entries' points to an array of 'struct
+ * e820_entry' which on entry has elements in the range [0, *nr_entries)
+ * valid, and which has space for up to max_nr_entries entries.
+ * On return, the resulting sanitized E820 map entries will be in
+ * overwritten in the same location, starting at 'entries'.
*
- * The integer pointed to by pnr_map must be valid on entry (the
- * current number of valid entries located at biosmap). If the
- * sanitizing succeeds the *pnr_map will be updated with the new
- * number of valid entries (something no more than max_nr_map).
+ * The integer pointed to by nr_entries must be valid on entry (the
+ * current number of valid entries located at 'entries'). If the
+ * sanitizing succeeds the *nr_entries will be updated with the new
+ * number of valid entries (something no more than max_nr_entries).
*
- * The return value from sanitize_e820_map() is zero if it
+ * The return value from e820__update_table() is zero if it
* successfully 'sanitized' the map entries passed in, and is -1
* if it did nothing, which can happen if either of (1) it was
* only passed one map entry, or (2) any of the input map entries
@@ -238,10 +229,17 @@ void __init e820_print_map(char *who)
* ______________________4_
*/
struct change_member {
- struct e820entry *pbios; /* pointer to original bios entry */
- unsigned long long addr; /* address for this change point */
+ /* Pointer to the original entry: */
+ struct e820_entry *entry;
+ /* Address for this change point: */
+ unsigned long long addr;
};
+static struct change_member change_point_list[2*E820_MAX_ENTRIES] __initdata;
+static struct change_member *change_point[2*E820_MAX_ENTRIES] __initdata;
+static struct e820_entry *overlap_list[E820_MAX_ENTRIES] __initdata;
+static struct e820_entry new_entries[E820_MAX_ENTRIES] __initdata;
+
static int __init cpcompare(const void *a, const void *b)
{
struct change_member * const *app = a, * const *bpp = b;
@@ -249,164 +247,141 @@ static int __init cpcompare(const void *a, const void *b)
/*
* Inputs are pointers to two elements of change_point[]. If their
- * addresses are unequal, their difference dominates. If the addresses
+ * addresses are not equal, their difference dominates. If the addresses
* are equal, then consider one that represents the end of its region
* to be greater than one that does not.
*/
if (ap->addr != bp->addr)
return ap->addr > bp->addr ? 1 : -1;
- return (ap->addr != ap->pbios->addr) - (bp->addr != bp->pbios->addr);
+ return (ap->addr != ap->entry->addr) - (bp->addr != bp->entry->addr);
}
-int __init sanitize_e820_map(struct e820entry *biosmap, int max_nr_map,
- u32 *pnr_map)
+int __init e820__update_table(struct e820_table *table)
{
- static struct change_member change_point_list[2*E820_X_MAX] __initdata;
- static struct change_member *change_point[2*E820_X_MAX] __initdata;
- static struct e820entry *overlap_list[E820_X_MAX] __initdata;
- static struct e820entry new_bios[E820_X_MAX] __initdata;
- unsigned long current_type, last_type;
+ struct e820_entry *entries = table->entries;
+ u32 max_nr_entries = ARRAY_SIZE(table->entries);
+ enum e820_type current_type, last_type;
unsigned long long last_addr;
- int chgidx;
- int overlap_entries;
- int new_bios_entry;
- int old_nr, new_nr, chg_nr;
- int i;
+ u32 new_nr_entries, overlap_entries;
+ u32 i, chg_idx, chg_nr;
- /* if there's only one memory region, don't bother */
- if (*pnr_map < 2)
+ /* If there's only one memory region, don't bother: */
+ if (table->nr_entries < 2)
return -1;
- old_nr = *pnr_map;
- BUG_ON(old_nr > max_nr_map);
+ table->nr_entries = table->nr_entries;
+ BUG_ON(table->nr_entries > max_nr_entries);
- /* bail out if we find any unreasonable addresses in bios map */
- for (i = 0; i < old_nr; i++)
- if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr)
+ /* Bail out if we find any unreasonable addresses in the map: */
+ for (i = 0; i < table->nr_entries; i++) {
+ if (entries[i].addr + entries[i].size < entries[i].addr)
return -1;
+ }
- /* create pointers for initial change-point information (for sorting) */
- for (i = 0; i < 2 * old_nr; i++)
+ /* Create pointers for initial change-point information (for sorting): */
+ for (i = 0; i < 2 * table->nr_entries; i++)
change_point[i] = &change_point_list[i];
- /* record all known change-points (starting and ending addresses),
- omitting those that are for empty memory regions */
- chgidx = 0;
- for (i = 0; i < old_nr; i++) {
- if (biosmap[i].size != 0) {
- change_point[chgidx]->addr = biosmap[i].addr;
- change_point[chgidx++]->pbios = &biosmap[i];
- change_point[chgidx]->addr = biosmap[i].addr +
- biosmap[i].size;
- change_point[chgidx++]->pbios = &biosmap[i];
+ /*
+ * Record all known change-points (starting and ending addresses),
+ * omitting empty memory regions:
+ */
+ chg_idx = 0;
+ for (i = 0; i < table->nr_entries; i++) {
+ if (entries[i].size != 0) {
+ change_point[chg_idx]->addr = entries[i].addr;
+ change_point[chg_idx++]->entry = &entries[i];
+ change_point[chg_idx]->addr = entries[i].addr + entries[i].size;
+ change_point[chg_idx++]->entry = &entries[i];
}
}
- chg_nr = chgidx;
-
- /* sort change-point list by memory addresses (low -> high) */
- sort(change_point, chg_nr, sizeof *change_point, cpcompare, NULL);
-
- /* create a new bios memory map, removing overlaps */
- overlap_entries = 0; /* number of entries in the overlap table */
- new_bios_entry = 0; /* index for creating new bios map entries */
- last_type = 0; /* start with undefined memory type */
- last_addr = 0; /* start with 0 as last starting address */
-
- /* loop through change-points, determining affect on the new bios map */
- for (chgidx = 0; chgidx < chg_nr; chgidx++) {
- /* keep track of all overlapping bios entries */
- if (change_point[chgidx]->addr ==
- change_point[chgidx]->pbios->addr) {
- /*
- * add map entry to overlap list (> 1 entry
- * implies an overlap)
- */
- overlap_list[overlap_entries++] =
- change_point[chgidx]->pbios;
+ chg_nr = chg_idx;
+
+ /* Sort change-point list by memory addresses (low -> high): */
+ sort(change_point, chg_nr, sizeof(*change_point), cpcompare, NULL);
+
+ /* Create a new memory map, removing overlaps: */
+ overlap_entries = 0; /* Number of entries in the overlap table */
+ new_nr_entries = 0; /* Index for creating new map entries */
+ last_type = 0; /* Start with undefined memory type */
+ last_addr = 0; /* Start with 0 as last starting address */
+
+ /* Loop through change-points, determining effect on the new map: */
+ for (chg_idx = 0; chg_idx < chg_nr; chg_idx++) {
+ /* Keep track of all overlapping entries */
+ if (change_point[chg_idx]->addr == change_point[chg_idx]->entry->addr) {
+ /* Add map entry to overlap list (> 1 entry implies an overlap) */
+ overlap_list[overlap_entries++] = change_point[chg_idx]->entry;
} else {
- /*
- * remove entry from list (order independent,
- * so swap with last)
- */
+ /* Remove entry from list (order independent, so swap with last): */
for (i = 0; i < overlap_entries; i++) {
- if (overlap_list[i] ==
- change_point[chgidx]->pbios)
- overlap_list[i] =
- overlap_list[overlap_entries-1];
+ if (overlap_list[i] == change_point[chg_idx]->entry)
+ overlap_list[i] = overlap_list[overlap_entries-1];
}
overlap_entries--;
}
/*
- * if there are overlapping entries, decide which
+ * If there are overlapping entries, decide which
* "type" to use (larger value takes precedence --
* 1=usable, 2,3,4,4+=unusable)
*/
current_type = 0;
- for (i = 0; i < overlap_entries; i++)
+ for (i = 0; i < overlap_entries; i++) {
if (overlap_list[i]->type > current_type)
current_type = overlap_list[i]->type;
- /*
- * continue building up new bios map based on this
- * information
- */
- if (current_type != last_type || current_type == E820_PRAM) {
+ }
+
+ /* Continue building up new map based on this information: */
+ if (current_type != last_type || current_type == E820_TYPE_PRAM) {
if (last_type != 0) {
- new_bios[new_bios_entry].size =
- change_point[chgidx]->addr - last_addr;
- /*
- * move forward only if the new size
- * was non-zero
- */
- if (new_bios[new_bios_entry].size != 0)
- /*
- * no more space left for new
- * bios entries ?
- */
- if (++new_bios_entry >= max_nr_map)
+ new_entries[new_nr_entries].size = change_point[chg_idx]->addr - last_addr;
+ /* Move forward only if the new size was non-zero: */
+ if (new_entries[new_nr_entries].size != 0)
+ /* No more space left for new entries? */
+ if (++new_nr_entries >= max_nr_entries)
break;
}
if (current_type != 0) {
- new_bios[new_bios_entry].addr =
- change_point[chgidx]->addr;
- new_bios[new_bios_entry].type = current_type;
- last_addr = change_point[chgidx]->addr;
+ new_entries[new_nr_entries].addr = change_point[chg_idx]->addr;
+ new_entries[new_nr_entries].type = current_type;
+ last_addr = change_point[chg_idx]->addr;
}
last_type = current_type;
}
}
- /* retain count for new bios entries */
- new_nr = new_bios_entry;
- /* copy new bios mapping into original location */
- memcpy(biosmap, new_bios, new_nr * sizeof(struct e820entry));
- *pnr_map = new_nr;
+ /* Copy the new entries into the original location: */
+ memcpy(entries, new_entries, new_nr_entries*sizeof(*entries));
+ table->nr_entries = new_nr_entries;
return 0;
}
-static int __init __append_e820_map(struct e820entry *biosmap, int nr_map)
+static int __init __append_e820_table(struct boot_e820_entry *entries, u32 nr_entries)
{
- while (nr_map) {
- u64 start = biosmap->addr;
- u64 size = biosmap->size;
+ struct boot_e820_entry *entry = entries;
+
+ while (nr_entries) {
+ u64 start = entry->addr;
+ u64 size = entry->size;
u64 end = start + size - 1;
- u32 type = biosmap->type;
+ u32 type = entry->type;
- /* Overflow in 64 bits? Ignore the memory map. */
+ /* Ignore the entry on 64-bit overflow: */
if (start > end && likely(size))
return -1;
- e820_add_region(start, size, type);
+ e820__range_add(start, size, type);
- biosmap++;
- nr_map--;
+ entry++;
+ nr_entries--;
}
return 0;
}
/*
- * Copy the BIOS e820 map into a safe place.
+ * Copy the BIOS E820 map into a safe place.
*
* Sanity-check it while we're at it..
*
@@ -414,18 +389,17 @@ static int __init __append_e820_map(struct e820entry *biosmap, int nr_map)
* will have given us a memory map that we can use to properly
* set up memory. If we aren't, we'll fake a memory map.
*/
-static int __init append_e820_map(struct e820entry *biosmap, int nr_map)
+static int __init append_e820_table(struct boot_e820_entry *entries, u32 nr_entries)
{
/* Only one memory region (or negative)? Ignore it */
- if (nr_map < 2)
+ if (nr_entries < 2)
return -1;
- return __append_e820_map(biosmap, nr_map);
+ return __append_e820_table(entries, nr_entries);
}
-static u64 __init __e820_update_range(struct e820map *e820x, u64 start,
- u64 size, unsigned old_type,
- unsigned new_type)
+static u64 __init
+__e820__range_update(struct e820_table *table, u64 start, u64 size, enum e820_type old_type, enum e820_type new_type)
{
u64 end;
unsigned int i;
@@ -437,77 +411,73 @@ static u64 __init __e820_update_range(struct e820map *e820x, u64 start,
size = ULLONG_MAX - start;
end = start + size;
- printk(KERN_DEBUG "e820: update [mem %#010Lx-%#010Lx] ",
- (unsigned long long) start, (unsigned long long) (end - 1));
+ printk(KERN_DEBUG "e820: update [mem %#010Lx-%#010Lx] ", start, end - 1);
e820_print_type(old_type);
- printk(KERN_CONT " ==> ");
+ pr_cont(" ==> ");
e820_print_type(new_type);
- printk(KERN_CONT "\n");
+ pr_cont("\n");
- for (i = 0; i < e820x->nr_map; i++) {
- struct e820entry *ei = &e820x->map[i];
+ for (i = 0; i < table->nr_entries; i++) {
+ struct e820_entry *entry = &table->entries[i];
u64 final_start, final_end;
- u64 ei_end;
+ u64 entry_end;
- if (ei->type != old_type)
+ if (entry->type != old_type)
continue;
- ei_end = ei->addr + ei->size;
- /* totally covered by new range? */
- if (ei->addr >= start && ei_end <= end) {
- ei->type = new_type;
- real_updated_size += ei->size;
+ entry_end = entry->addr + entry->size;
+
+ /* Completely covered by new range? */
+ if (entry->addr >= start && entry_end <= end) {
+ entry->type = new_type;
+ real_updated_size += entry->size;
continue;
}
- /* new range is totally covered? */
- if (ei->addr < start && ei_end > end) {
- __e820_add_region(e820x, start, size, new_type);
- __e820_add_region(e820x, end, ei_end - end, ei->type);
- ei->size = start - ei->addr;
+ /* New range is completely covered? */
+ if (entry->addr < start && entry_end > end) {
+ __e820__range_add(table, start, size, new_type);
+ __e820__range_add(table, end, entry_end - end, entry->type);
+ entry->size = start - entry->addr;
real_updated_size += size;
continue;
}
- /* partially covered */
- final_start = max(start, ei->addr);
- final_end = min(end, ei_end);
+ /* Partially covered: */
+ final_start = max(start, entry->addr);
+ final_end = min(end, entry_end);
if (final_start >= final_end)
continue;
- __e820_add_region(e820x, final_start, final_end - final_start,
- new_type);
+ __e820__range_add(table, final_start, final_end - final_start, new_type);
real_updated_size += final_end - final_start;
/*
- * left range could be head or tail, so need to update
- * size at first.
+ * Left range could be head or tail, so need to update
+ * its size first:
*/
- ei->size -= final_end - final_start;
- if (ei->addr < final_start)
+ entry->size -= final_end - final_start;
+ if (entry->addr < final_start)
continue;
- ei->addr = final_end;
+
+ entry->addr = final_end;
}
return real_updated_size;
}
-u64 __init e820_update_range(u64 start, u64 size, unsigned old_type,
- unsigned new_type)
+u64 __init e820__range_update(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type)
{
- return __e820_update_range(e820, start, size, old_type, new_type);
+ return __e820__range_update(e820_table, start, size, old_type, new_type);
}
-static u64 __init e820_update_range_saved(u64 start, u64 size,
- unsigned old_type, unsigned new_type)
+static u64 __init e820__range_update_firmware(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type)
{
- return __e820_update_range(e820_saved, start, size, old_type,
- new_type);
+ return __e820__range_update(e820_table_firmware, start, size, old_type, new_type);
}
-/* make e820 not cover the range */
-u64 __init e820_remove_range(u64 start, u64 size, unsigned old_type,
- int checktype)
+/* Remove a range of memory from the E820 table: */
+u64 __init e820__range_remove(u64 start, u64 size, enum e820_type old_type, bool check_type)
{
int i;
u64 end;
@@ -517,85 +487,89 @@ u64 __init e820_remove_range(u64 start, u64 size, unsigned old_type,
size = ULLONG_MAX - start;
end = start + size;
- printk(KERN_DEBUG "e820: remove [mem %#010Lx-%#010Lx] ",
- (unsigned long long) start, (unsigned long long) (end - 1));
- if (checktype)
+ printk(KERN_DEBUG "e820: remove [mem %#010Lx-%#010Lx] ", start, end - 1);
+ if (check_type)
e820_print_type(old_type);
- printk(KERN_CONT "\n");
+ pr_cont("\n");
- for (i = 0; i < e820->nr_map; i++) {
- struct e820entry *ei = &e820->map[i];
+ for (i = 0; i < e820_table->nr_entries; i++) {
+ struct e820_entry *entry = &e820_table->entries[i];
u64 final_start, final_end;
- u64 ei_end;
+ u64 entry_end;
- if (checktype && ei->type != old_type)
+ if (check_type && entry->type != old_type)
continue;
- ei_end = ei->addr + ei->size;
- /* totally covered? */
- if (ei->addr >= start && ei_end <= end) {
- real_removed_size += ei->size;
- memset(ei, 0, sizeof(struct e820entry));
+ entry_end = entry->addr + entry->size;
+
+ /* Completely covered? */
+ if (entry->addr >= start && entry_end <= end) {
+ real_removed_size += entry->size;
+ memset(entry, 0, sizeof(*entry));
continue;
}
- /* new range is totally covered? */
- if (ei->addr < start && ei_end > end) {
- e820_add_region(end, ei_end - end, ei->type);
- ei->size = start - ei->addr;
+ /* Is the new range completely covered? */
+ if (entry->addr < start && entry_end > end) {
+ e820__range_add(end, entry_end - end, entry->type);
+ entry->size = start - entry->addr;
real_removed_size += size;
continue;
}
- /* partially covered */
- final_start = max(start, ei->addr);
- final_end = min(end, ei_end);
+ /* Partially covered: */
+ final_start = max(start, entry->addr);
+ final_end = min(end, entry_end);
if (final_start >= final_end)
continue;
+
real_removed_size += final_end - final_start;
/*
- * left range could be head or tail, so need to update
- * size at first.
+ * Left range could be head or tail, so need to update
+ * the size first:
*/
- ei->size -= final_end - final_start;
- if (ei->addr < final_start)
+ entry->size -= final_end - final_start;
+ if (entry->addr < final_start)
continue;
- ei->addr = final_end;
+
+ entry->addr = final_end;
}
return real_removed_size;
}
-void __init update_e820(void)
+void __init e820__update_table_print(void)
{
- if (sanitize_e820_map(e820->map, ARRAY_SIZE(e820->map), &e820->nr_map))
+ if (e820__update_table(e820_table))
return;
- printk(KERN_INFO "e820: modified physical RAM map:\n");
- e820_print_map("modified");
+
+ pr_info("e820: modified physical RAM map:\n");
+ e820__print_table("modified");
}
-static void __init update_e820_saved(void)
+
+static void __init e820__update_table_firmware(void)
{
- sanitize_e820_map(e820_saved->map, ARRAY_SIZE(e820_saved->map),
- &e820_saved->nr_map);
+ e820__update_table(e820_table_firmware);
}
+
#define MAX_GAP_END 0x100000000ull
+
/*
- * Search for a gap in the e820 memory space from 0 to MAX_GAP_END.
+ * Search for a gap in the E820 memory space from 0 to MAX_GAP_END (4GB).
*/
-static int __init e820_search_gap(unsigned long *gapstart,
- unsigned long *gapsize)
+static int __init e820_search_gap(unsigned long *gapstart, unsigned long *gapsize)
{
unsigned long long last = MAX_GAP_END;
- int i = e820->nr_map;
+ int i = e820_table->nr_entries;
int found = 0;
while (--i >= 0) {
- unsigned long long start = e820->map[i].addr;
- unsigned long long end = start + e820->map[i].size;
+ unsigned long long start = e820_table->entries[i].addr;
+ unsigned long long end = start + e820_table->entries[i].size;
/*
* Since "last" is at most 4GB, we know we'll
- * fit in 32 bits if this condition is true
+ * fit in 32 bits if this condition is true:
*/
if (last > end) {
unsigned long gap = last - end;
@@ -613,12 +587,14 @@ static int __init e820_search_gap(unsigned long *gapstart,
}
/*
- * Search for the biggest gap in the low 32 bits of the e820
- * memory space. We pass this space to PCI to assign MMIO resources
- * for hotplug or unconfigured devices in.
+ * Search for the biggest gap in the low 32 bits of the E820
+ * memory space. We pass this space to the PCI subsystem, so
+ * that it can assign MMIO resources for hotplug or
+ * unconfigured devices in.
+ *
* Hopefully the BIOS let enough space left.
*/
-__init void e820_setup_gap(void)
+__init void e820__setup_pci_gap(void)
{
unsigned long gapstart, gapsize;
int found;
@@ -629,138 +605,143 @@ __init void e820_setup_gap(void)
if (!found) {
#ifdef CONFIG_X86_64
gapstart = (max_pfn << PAGE_SHIFT) + 1024*1024;
- printk(KERN_ERR
- "e820: cannot find a gap in the 32bit address range\n"
- "e820: PCI devices with unassigned 32bit BARs may break!\n");
+ pr_err(
+ "e820: Cannot find an available gap in the 32-bit address range\n"
+ "e820: PCI devices with unassigned 32-bit BARs may not work!\n");
#else
gapstart = 0x10000000;
#endif
}
/*
- * e820_reserve_resources_late protect stolen RAM already
+ * e820__reserve_resources_late() protects stolen RAM already:
*/
pci_mem_start = gapstart;
- printk(KERN_INFO
- "e820: [mem %#010lx-%#010lx] available for PCI devices\n",
- gapstart, gapstart + gapsize - 1);
+ pr_info("e820: [mem %#010lx-%#010lx] available for PCI devices\n", gapstart, gapstart + gapsize - 1);
}
/*
* Called late during init, in free_initmem().
*
- * Initial e820 and e820_saved are largish __initdata arrays.
- * Copy them to (usually much smaller) dynamically allocated area.
- * This is done after all tweaks we ever do to them:
- * all functions which modify them are __init functions,
- * they won't exist after this point.
+ * Initial e820_table and e820_table_firmware are largish __initdata arrays.
+ *
+ * Copy them to a (usually much smaller) dynamically allocated area that is
+ * sized precisely after the number of e820 entries.
+ *
+ * This is done after we've performed all the fixes and tweaks to the tables.
+ * All functions which modify them are __init functions, which won't exist
+ * after free_initmem().
*/
-__init void e820_reallocate_tables(void)
+__init void e820__reallocate_tables(void)
{
- struct e820map *n;
+ struct e820_table *n;
int size;
- size = offsetof(struct e820map, map) + sizeof(struct e820entry) * e820->nr_map;
+ size = offsetof(struct e820_table, entries) + sizeof(struct e820_entry)*e820_table->nr_entries;
n = kmalloc(size, GFP_KERNEL);
BUG_ON(!n);
- memcpy(n, e820, size);
- e820 = n;
+ memcpy(n, e820_table, size);
+ e820_table = n;
- size = offsetof(struct e820map, map) + sizeof(struct e820entry) * e820_saved->nr_map;
+ size = offsetof(struct e820_table, entries) + sizeof(struct e820_entry)*e820_table_firmware->nr_entries;
n = kmalloc(size, GFP_KERNEL);
BUG_ON(!n);
- memcpy(n, e820_saved, size);
- e820_saved = n;
+ memcpy(n, e820_table_firmware, size);
+ e820_table_firmware = n;
}
-/**
- * Because of the size limitation of struct boot_params, only first
- * 128 E820 memory entries are passed to kernel via
- * boot_params.e820_map, others are passed via SETUP_E820_EXT node of
- * linked list of struct setup_data, which is parsed here.
+/*
+ * Because of the small fixed size of struct boot_params, only the first
+ * 128 E820 memory entries are passed to the kernel via boot_params.e820_table,
+ * the remaining (if any) entries are passed via the SETUP_E820_EXT node of
+ * struct setup_data, which is parsed here.
*/
-void __init parse_e820_ext(u64 phys_addr, u32 data_len)
+void __init e820__memory_setup_extended(u64 phys_addr, u32 data_len)
{
int entries;
- struct e820entry *extmap;
+ struct boot_e820_entry *extmap;
struct setup_data *sdata;
sdata = early_memremap(phys_addr, data_len);
- entries = sdata->len / sizeof(struct e820entry);
- extmap = (struct e820entry *)(sdata->data);
- __append_e820_map(extmap, entries);
- sanitize_e820_map(e820->map, ARRAY_SIZE(e820->map), &e820->nr_map);
+ entries = sdata->len / sizeof(*extmap);
+ extmap = (struct boot_e820_entry *)(sdata->data);
+
+ __append_e820_table(extmap, entries);
+ e820__update_table(e820_table);
+
early_memunmap(sdata, data_len);
- printk(KERN_INFO "e820: extended physical RAM map:\n");
- e820_print_map("extended");
+ pr_info("e820: extended physical RAM map:\n");
+ e820__print_table("extended");
}
-#if defined(CONFIG_X86_64) || \
- (defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION))
-/**
+/*
* Find the ranges of physical addresses that do not correspond to
- * e820 RAM areas and mark the corresponding pages as nosave for
- * hibernation (32 bit) or software suspend and suspend to RAM (64 bit).
+ * E820 RAM areas and register the corresponding pages as 'nosave' for
+ * hibernation (32-bit) or software suspend and suspend to RAM (64-bit).
*
- * This function requires the e820 map to be sorted and without any
+ * This function requires the E820 map to be sorted and without any
* overlapping entries.
*/
-void __init e820_mark_nosave_regions(unsigned long limit_pfn)
+void __init e820__register_nosave_regions(unsigned long limit_pfn)
{
int i;
unsigned long pfn = 0;
- for (i = 0; i < e820->nr_map; i++) {
- struct e820entry *ei = &e820->map[i];
+ for (i = 0; i < e820_table->nr_entries; i++) {
+ struct e820_entry *entry = &e820_table->entries[i];
- if (pfn < PFN_UP(ei->addr))
- register_nosave_region(pfn, PFN_UP(ei->addr));
+ if (pfn < PFN_UP(entry->addr))
+ register_nosave_region(pfn, PFN_UP(entry->addr));
- pfn = PFN_DOWN(ei->addr + ei->size);
+ pfn = PFN_DOWN(entry->addr + entry->size);
- if (ei->type != E820_RAM && ei->type != E820_RESERVED_KERN)
- register_nosave_region(PFN_UP(ei->addr), pfn);
+ if (entry->type != E820_TYPE_RAM && entry->type != E820_TYPE_RESERVED_KERN)
+ register_nosave_region(PFN_UP(entry->addr), pfn);
if (pfn >= limit_pfn)
break;
}
}
-#endif
#ifdef CONFIG_ACPI
-/**
- * Mark ACPI NVS memory region, so that we can save/restore it during
- * hibernation and the subsequent resume.
+/*
+ * Register ACPI NVS memory regions, so that we can save/restore them during
+ * hibernation and the subsequent resume:
*/
-static int __init e820_mark_nvs_memory(void)
+static int __init e820__register_nvs_regions(void)
{
int i;
- for (i = 0; i < e820->nr_map; i++) {
- struct e820entry *ei = &e820->map[i];
+ for (i = 0; i < e820_table->nr_entries; i++) {
+ struct e820_entry *entry = &e820_table->entries[i];
- if (ei->type == E820_NVS)
- acpi_nvs_register(ei->addr, ei->size);
+ if (entry->type == E820_TYPE_NVS)
+ acpi_nvs_register(entry->addr, entry->size);
}
return 0;
}
-core_initcall(e820_mark_nvs_memory);
+core_initcall(e820__register_nvs_regions);
#endif
/*
- * pre allocated 4k and reserved it in memblock and e820_saved
+ * Allocate the requested number of bytes with the requsted alignment
+ * and return (the physical address) to the caller. Also register this
+ * range in the 'firmware' E820 table as a reserved range.
+ *
+ * This allows kexec to fake a new mptable, as if it came from the real
+ * system.
*/
-u64 __init early_reserve_e820(u64 size, u64 align)
+u64 __init e820__memblock_alloc_reserved(u64 size, u64 align)
{
u64 addr;
addr = __memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
if (addr) {
- e820_update_range_saved(addr, size, E820_RAM, E820_RESERVED);
- printk(KERN_INFO "e820: update e820_saved for early_reserve_e820\n");
- update_e820_saved();
+ e820__range_update_firmware(addr, size, E820_TYPE_RAM, E820_TYPE_RESERVED);
+ pr_info("e820: update e820_table_firmware for e820__memblock_alloc_reserved()\n");
+ e820__update_table_firmware();
}
return addr;
@@ -779,22 +760,22 @@ u64 __init early_reserve_e820(u64 size, u64 align)
/*
* Find the highest page frame number we have available
*/
-static unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
+static unsigned long __init e820_end_pfn(unsigned long limit_pfn, enum e820_type type)
{
int i;
unsigned long last_pfn = 0;
unsigned long max_arch_pfn = MAX_ARCH_PFN;
- for (i = 0; i < e820->nr_map; i++) {
- struct e820entry *ei = &e820->map[i];
+ for (i = 0; i < e820_table->nr_entries; i++) {
+ struct e820_entry *entry = &e820_table->entries[i];
unsigned long start_pfn;
unsigned long end_pfn;
- if (ei->type != type)
+ if (entry->type != type)
continue;
- start_pfn = ei->addr >> PAGE_SHIFT;
- end_pfn = (ei->addr + ei->size) >> PAGE_SHIFT;
+ start_pfn = entry->addr >> PAGE_SHIFT;
+ end_pfn = (entry->addr + entry->size) >> PAGE_SHIFT;
if (start_pfn >= limit_pfn)
continue;
@@ -809,18 +790,19 @@ static unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
if (last_pfn > max_arch_pfn)
last_pfn = max_arch_pfn;
- printk(KERN_INFO "e820: last_pfn = %#lx max_arch_pfn = %#lx\n",
+ pr_info("e820: last_pfn = %#lx max_arch_pfn = %#lx\n",
last_pfn, max_arch_pfn);
return last_pfn;
}
-unsigned long __init e820_end_of_ram_pfn(void)
+
+unsigned long __init e820__end_of_ram_pfn(void)
{
- return e820_end_pfn(MAX_ARCH_PFN, E820_RAM);
+ return e820_end_pfn(MAX_ARCH_PFN, E820_TYPE_RAM);
}
-unsigned long __init e820_end_of_low_ram_pfn(void)
+unsigned long __init e820__end_of_low_ram_pfn(void)
{
- return e820_end_pfn(1UL << (32 - PAGE_SHIFT), E820_RAM);
+ return e820_end_pfn(1UL << (32 - PAGE_SHIFT), E820_TYPE_RAM);
}
static void __init early_panic(char *msg)
@@ -831,7 +813,7 @@ static void __init early_panic(char *msg)
static int userdef __initdata;
-/* "mem=nopentium" disables the 4MB page tables. */
+/* The "mem=nopentium" boot option disables 4MB page tables on 32-bit kernels: */
static int __init parse_memopt(char *p)
{
u64 mem_size;
@@ -844,17 +826,19 @@ static int __init parse_memopt(char *p)
setup_clear_cpu_cap(X86_FEATURE_PSE);
return 0;
#else
- printk(KERN_WARNING "mem=nopentium ignored! (only supported on x86_32)\n");
+ pr_warn("mem=nopentium ignored! (only supported on x86_32)\n");
return -EINVAL;
#endif
}
userdef = 1;
mem_size = memparse(p, &p);
- /* don't remove all of memory when handling "mem={invalid}" param */
+
+ /* Don't remove all memory when getting "mem={invalid}" parameter: */
if (mem_size == 0)
return -EINVAL;
- e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);
+
+ e820__range_remove(mem_size, ULLONG_MAX - mem_size, E820_TYPE_RAM, 1);
return 0;
}
@@ -872,12 +856,12 @@ static int __init parse_memmap_one(char *p)
#ifdef CONFIG_CRASH_DUMP
/*
* If we are doing a crash dump, we still need to know
- * the real mem size before original memory map is
+ * the real memory size before the original memory map is
* reset.
*/
- saved_max_pfn = e820_end_of_ram_pfn();
+ saved_max_pfn = e820__end_of_ram_pfn();
#endif
- e820->nr_map = 0;
+ e820_table->nr_entries = 0;
userdef = 1;
return 0;
}
@@ -890,21 +874,23 @@ static int __init parse_memmap_one(char *p)
userdef = 1;
if (*p == '@') {
start_at = memparse(p+1, &p);
- e820_add_region(start_at, mem_size, E820_RAM);
+ e820__range_add(start_at, mem_size, E820_TYPE_RAM);
} else if (*p == '#') {
start_at = memparse(p+1, &p);
- e820_add_region(start_at, mem_size, E820_ACPI);
+ e820__range_add(start_at, mem_size, E820_TYPE_ACPI);
} else if (*p == '$') {
start_at = memparse(p+1, &p);
- e820_add_region(start_at, mem_size, E820_RESERVED);
+ e820__range_add(start_at, mem_size, E820_TYPE_RESERVED);
} else if (*p == '!') {
start_at = memparse(p+1, &p);
- e820_add_region(start_at, mem_size, E820_PRAM);
- } else
- e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);
+ e820__range_add(start_at, mem_size, E820_TYPE_PRAM);
+ } else {
+ e820__range_remove(mem_size, ULLONG_MAX - mem_size, E820_TYPE_RAM, 1);
+ }
return *p == '\0' ? 0 : -EINVAL;
}
+
static int __init parse_memmap_opt(char *str)
{
while (str) {
@@ -921,68 +907,97 @@ static int __init parse_memmap_opt(char *str)
}
early_param("memmap", parse_memmap_opt);
-void __init finish_e820_parsing(void)
+/*
+ * Reserve all entries from the bootloader's extensible data nodes list,
+ * because if present we are going to use it later on to fetch e820
+ * entries from it:
+ */
+void __init e820__reserve_setup_data(void)
+{
+ struct setup_data *data;
+ u64 pa_data;
+
+ pa_data = boot_params.hdr.setup_data;
+ if (!pa_data)
+ return;
+
+ while (pa_data) {
+ data = early_memremap(pa_data, sizeof(*data));
+ e820__range_update(pa_data, sizeof(*data)+data->len, E820_TYPE_RAM, E820_TYPE_RESERVED_KERN);
+ pa_data = data->next;
+ early_memunmap(data, sizeof(*data));
+ }
+
+ e820__update_table(e820_table);
+
+ memcpy(e820_table_firmware, e820_table, sizeof(*e820_table_firmware));
+
+ pr_info("extended physical RAM map:\n");
+ e820__print_table("reserve setup_data");
+}
+
+/*
+ * Called after parse_early_param(), after early parameters (such as mem=)
+ * have been processed, in which case we already have an E820 table filled in
+ * via the parameter callback function(s), but it's not sorted and printed yet:
+ */
+void __init e820__finish_early_params(void)
{
if (userdef) {
- if (sanitize_e820_map(e820->map, ARRAY_SIZE(e820->map),
- &e820->nr_map) < 0)
+ if (e820__update_table(e820_table) < 0)
early_panic("Invalid user supplied memory map");
- printk(KERN_INFO "e820: user-defined physical RAM map:\n");
- e820_print_map("user");
+ pr_info("e820: user-defined physical RAM map:\n");
+ e820__print_table("user");
}
}
-static const char *__init e820_type_to_string(int e820_type)
+static const char *__init e820_type_to_string(struct e820_entry *entry)
{
- switch (e820_type) {
- case E820_RESERVED_KERN:
- case E820_RAM: return "System RAM";
- case E820_ACPI: return "ACPI Tables";
- case E820_NVS: return "ACPI Non-volatile Storage";
- case E820_UNUSABLE: return "Unusable memory";
- case E820_PRAM: return "Persistent Memory (legacy)";
- case E820_PMEM: return "Persistent Memory";
- default: return "reserved";
+ switch (entry->type) {
+ case E820_TYPE_RESERVED_KERN: /* Fall-through: */
+ case E820_TYPE_RAM: return "System RAM";
+ case E820_TYPE_ACPI: return "ACPI Tables";
+ case E820_TYPE_NVS: return "ACPI Non-volatile Storage";
+ case E820_TYPE_UNUSABLE: return "Unusable memory";
+ case E820_TYPE_PRAM: return "Persistent Memory (legacy)";
+ case E820_TYPE_PMEM: return "Persistent Memory";
+ case E820_TYPE_RESERVED: return "Reserved";
+ default: return "Unknown E820 type";
}
}
-static unsigned long __init e820_type_to_iomem_type(int e820_type)
+static unsigned long __init e820_type_to_iomem_type(struct e820_entry *entry)
{
- switch (e820_type) {
- case E820_RESERVED_KERN:
- case E820_RAM:
- return IORESOURCE_SYSTEM_RAM;
- case E820_ACPI:
- case E820_NVS:
- case E820_UNUSABLE:
- case E820_PRAM:
- case E820_PMEM:
- default:
- return IORESOURCE_MEM;
+ switch (entry->type) {
+ case E820_TYPE_RESERVED_KERN: /* Fall-through: */
+ case E820_TYPE_RAM: return IORESOURCE_SYSTEM_RAM;
+ case E820_TYPE_ACPI: /* Fall-through: */
+ case E820_TYPE_NVS: /* Fall-through: */
+ case E820_TYPE_UNUSABLE: /* Fall-through: */
+ case E820_TYPE_PRAM: /* Fall-through: */
+ case E820_TYPE_PMEM: /* Fall-through: */
+ case E820_TYPE_RESERVED: /* Fall-through: */
+ default: return IORESOURCE_MEM;
}
}
-static unsigned long __init e820_type_to_iores_desc(int e820_type)
+static unsigned long __init e820_type_to_iores_desc(struct e820_entry *entry)
{
- switch (e820_type) {
- case E820_ACPI:
- return IORES_DESC_ACPI_TABLES;
- case E820_NVS:
- return IORES_DESC_ACPI_NV_STORAGE;
- case E820_PMEM:
- return IORES_DESC_PERSISTENT_MEMORY;
- case E820_PRAM:
- return IORES_DESC_PERSISTENT_MEMORY_LEGACY;
- case E820_RESERVED_KERN:
- case E820_RAM:
- case E820_UNUSABLE:
- default:
- return IORES_DESC_NONE;
+ switch (entry->type) {
+ case E820_TYPE_ACPI: return IORES_DESC_ACPI_TABLES;
+ case E820_TYPE_NVS: return IORES_DESC_ACPI_NV_STORAGE;
+ case E820_TYPE_PMEM: return IORES_DESC_PERSISTENT_MEMORY;
+ case E820_TYPE_PRAM: return IORES_DESC_PERSISTENT_MEMORY_LEGACY;
+ case E820_TYPE_RESERVED_KERN: /* Fall-through: */
+ case E820_TYPE_RAM: /* Fall-through: */
+ case E820_TYPE_UNUSABLE: /* Fall-through: */
+ case E820_TYPE_RESERVED: /* Fall-through: */
+ default: return IORES_DESC_NONE;
}
}
-static bool __init do_mark_busy(u32 type, struct resource *res)
+static bool __init do_mark_busy(enum e820_type type, struct resource *res)
{
/* this is the legacy bios/dos rom-shadow + mmio region */
if (res->start < (1ULL<<20))
@@ -993,61 +1008,71 @@ static bool __init do_mark_busy(u32 type, struct resource *res)
* for exclusive use of a driver
*/
switch (type) {
- case E820_RESERVED:
- case E820_PRAM:
- case E820_PMEM:
+ case E820_TYPE_RESERVED:
+ case E820_TYPE_PRAM:
+ case E820_TYPE_PMEM:
return false;
+ case E820_TYPE_RESERVED_KERN:
+ case E820_TYPE_RAM:
+ case E820_TYPE_ACPI:
+ case E820_TYPE_NVS:
+ case E820_TYPE_UNUSABLE:
default:
return true;
}
}
/*
- * Mark e820 reserved areas as busy for the resource manager.
+ * Mark E820 reserved areas as busy for the resource manager:
*/
+
static struct resource __initdata *e820_res;
-void __init e820_reserve_resources(void)
+
+void __init e820__reserve_resources(void)
{
int i;
struct resource *res;
u64 end;
- res = alloc_bootmem(sizeof(struct resource) * e820->nr_map);
+ res = alloc_bootmem(sizeof(*res) * e820_table->nr_entries);
e820_res = res;
- for (i = 0; i < e820->nr_map; i++) {
- end = e820->map[i].addr + e820->map[i].size - 1;
+
+ for (i = 0; i < e820_table->nr_entries; i++) {
+ struct e820_entry *entry = e820_table->entries + i;
+
+ end = entry->addr + entry->size - 1;
if (end != (resource_size_t)end) {
res++;
continue;
}
- res->name = e820_type_to_string(e820->map[i].type);
- res->start = e820->map[i].addr;
- res->end = end;
-
- res->flags = e820_type_to_iomem_type(e820->map[i].type);
- res->desc = e820_type_to_iores_desc(e820->map[i].type);
+ res->start = entry->addr;
+ res->end = end;
+ res->name = e820_type_to_string(entry);
+ res->flags = e820_type_to_iomem_type(entry);
+ res->desc = e820_type_to_iores_desc(entry);
/*
- * don't register the region that could be conflicted with
- * pci device BAR resource and insert them later in
- * pcibios_resource_survey()
+ * Don't register the region that could be conflicted with
+ * PCI device BAR resources and insert them later in
+ * pcibios_resource_survey():
*/
- if (do_mark_busy(e820->map[i].type, res)) {
+ if (do_mark_busy(entry->type, res)) {
res->flags |= IORESOURCE_BUSY;
insert_resource(&iomem_resource, res);
}
res++;
}
- for (i = 0; i < e820_saved->nr_map; i++) {
- struct e820entry *entry = &e820_saved->map[i];
- firmware_map_add_early(entry->addr,
- entry->addr + entry->size,
- e820_type_to_string(entry->type));
+ for (i = 0; i < e820_table_firmware->nr_entries; i++) {
+ struct e820_entry *entry = e820_table_firmware->entries + i;
+
+ firmware_map_add_early(entry->addr, entry->addr + entry->size, e820_type_to_string(entry));
}
}
-/* How much should we pad RAM ending depending on where it is? */
+/*
+ * How much should we pad the end of RAM, depending on where it is?
+ */
static unsigned long __init ram_alignment(resource_size_t pos)
{
unsigned long mb = pos >> 20;
@@ -1066,64 +1091,59 @@ static unsigned long __init ram_alignment(resource_size_t pos)
#define MAX_RESOURCE_SIZE ((resource_size_t)-1)
-void __init e820_reserve_resources_late(void)
+void __init e820__reserve_resources_late(void)
{
int i;
struct resource *res;
res = e820_res;
- for (i = 0; i < e820->nr_map; i++) {
+ for (i = 0; i < e820_table->nr_entries; i++) {
if (!res->parent && res->end)
insert_resource_expand_to_fit(&iomem_resource, res);
res++;
}
/*
- * Try to bump up RAM regions to reasonable boundaries to
+ * Try to bump up RAM regions to reasonable boundaries, to
* avoid stolen RAM:
*/
- for (i = 0; i < e820->nr_map; i++) {
- struct e820entry *entry = &e820->map[i];
+ for (i = 0; i < e820_table->nr_entries; i++) {
+ struct e820_entry *entry = &e820_table->entries[i];
u64 start, end;
- if (entry->type != E820_RAM)
+ if (entry->type != E820_TYPE_RAM)
continue;
+
start = entry->addr + entry->size;
end = round_up(start, ram_alignment(start)) - 1;
if (end > MAX_RESOURCE_SIZE)
end = MAX_RESOURCE_SIZE;
if (start >= end)
continue;
- printk(KERN_DEBUG
- "e820: reserve RAM buffer [mem %#010llx-%#010llx]\n",
- start, end);
- reserve_region_with_split(&iomem_resource, start, end,
- "RAM buffer");
+
+ printk(KERN_DEBUG "e820: reserve RAM buffer [mem %#010llx-%#010llx]\n", start, end);
+ reserve_region_with_split(&iomem_resource, start, end, "RAM buffer");
}
}
-char *__init default_machine_specific_memory_setup(void)
+/*
+ * Pass the firmware (bootloader) E820 map to the kernel and process it:
+ */
+char *__init e820__memory_setup_default(void)
{
char *who = "BIOS-e820";
- u32 new_nr;
+
/*
* Try to copy the BIOS-supplied E820-map.
*
* Otherwise fake a memory map; one section from 0k->640k,
* the next section from 1mb->appropriate_mem_k
*/
- new_nr = boot_params.e820_entries;
- sanitize_e820_map(boot_params.e820_map,
- ARRAY_SIZE(boot_params.e820_map),
- &new_nr);
- boot_params.e820_entries = new_nr;
- if (append_e820_map(boot_params.e820_map, boot_params.e820_entries)
- < 0) {
+ if (append_e820_table(boot_params.e820_table, boot_params.e820_entries) < 0) {
u64 mem_size;
- /* compare results from other methods and take the greater */
- if (boot_params.alt_mem_k
- < boot_params.screen_info.ext_mem_k) {
+ /* Compare results from other methods and take the one that gives more RAM: */
+ if (boot_params.alt_mem_k < boot_params.screen_info.ext_mem_k) {
mem_size = boot_params.screen_info.ext_mem_k;
who = "BIOS-88";
} else {
@@ -1131,84 +1151,68 @@ char *__init default_machine_specific_memory_setup(void)
who = "BIOS-e801";
}
- e820->nr_map = 0;
- e820_add_region(0, LOWMEMSIZE(), E820_RAM);
- e820_add_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
+ e820_table->nr_entries = 0;
+ e820__range_add(0, LOWMEMSIZE(), E820_TYPE_RAM);
+ e820__range_add(HIGH_MEMORY, mem_size << 10, E820_TYPE_RAM);
}
- /* In case someone cares... */
+ /* We just appended a lot of ranges, sanitize the table: */
+ e820__update_table(e820_table);
+
return who;
}
-void __init setup_memory_map(void)
+/*
+ * Calls e820__memory_setup_default() in essence to pick up the firmware/bootloader
+ * E820 map - with an optional platform quirk available for virtual platforms
+ * to override this method of boot environment processing:
+ */
+void __init e820__memory_setup(void)
{
char *who;
+ /* This is a firmware interface ABI - make sure we don't break it: */
+ BUILD_BUG_ON(sizeof(struct boot_e820_entry) != 20);
+
who = x86_init.resources.memory_setup();
- memcpy(e820_saved, e820, sizeof(struct e820map));
- printk(KERN_INFO "e820: BIOS-provided physical RAM map:\n");
- e820_print_map(who);
+
+ memcpy(e820_table_firmware, e820_table, sizeof(*e820_table_firmware));
+
+ pr_info("e820: BIOS-provided physical RAM map:\n");
+ e820__print_table(who);
}
-void __init memblock_x86_fill(void)
+void __init e820__memblock_setup(void)
{
int i;
u64 end;
/*
- * EFI may have more than 128 entries
- * We are safe to enable resizing, beause memblock_x86_fill()
- * is rather later for x86
+ * The bootstrap memblock region count maximum is 128 entries
+ * (INIT_MEMBLOCK_REGIONS), but EFI might pass us more E820 entries
+ * than that - so allow memblock resizing.
+ *
+ * This is safe, because this call happens pretty late during x86 setup,
+ * so we know about reserved memory regions already. (This is important
+ * so that memblock resizing does no stomp over reserved areas.)
*/
memblock_allow_resize();
- for (i = 0; i < e820->nr_map; i++) {
- struct e820entry *ei = &e820->map[i];
+ for (i = 0; i < e820_table->nr_entries; i++) {
+ struct e820_entry *entry = &e820_table->entries[i];
- end = ei->addr + ei->size;
+ end = entry->addr + entry->size;
if (end != (resource_size_t)end)
continue;
- if (ei->type != E820_RAM && ei->type != E820_RESERVED_KERN)
+ if (entry->type != E820_TYPE_RAM && entry->type != E820_TYPE_RESERVED_KERN)
continue;
- memblock_add(ei->addr, ei->size);
+ memblock_add(entry->addr, entry->size);
}
- /* throw away partial pages */
+ /* Throw away partial pages: */
memblock_trim_memory(PAGE_SIZE);
memblock_dump_all();
}
-
-void __init memblock_find_dma_reserve(void)
-{
-#ifdef CONFIG_X86_64
- u64 nr_pages = 0, nr_free_pages = 0;
- unsigned long start_pfn, end_pfn;
- phys_addr_t start, end;
- int i;
- u64 u;
-
- /*
- * need to find out used area below MAX_DMA_PFN
- * need to use memblock to get free size in [0, MAX_DMA_PFN]
- * at first, and assume boot_mem will not take below MAX_DMA_PFN
- */
- for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, NULL) {
- start_pfn = min(start_pfn, MAX_DMA_PFN);
- end_pfn = min(end_pfn, MAX_DMA_PFN);
- nr_pages += end_pfn - start_pfn;
- }
-
- for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end,
- NULL) {
- start_pfn = min_t(unsigned long, PFN_UP(start), MAX_DMA_PFN);
- end_pfn = min_t(unsigned long, PFN_DOWN(end), MAX_DMA_PFN);
- if (start_pfn < end_pfn)
- nr_free_pages += end_pfn - start_pfn;
- }
-
- set_dma_reserve(nr_pages - nr_free_pages);
-#endif
-}
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index 6a08e25a48d8..ff7e4b3988ed 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -546,8 +546,8 @@ intel_graphics_stolen(int num, int slot, int func,
&base, &end);
/* Mark this space as reserved */
- e820_add_region(base, size, E820_RESERVED);
- sanitize_e820_map(e820->map, ARRAY_SIZE(e820->map), &e820->nr_map);
+ e820__range_add(base, size, E820_TYPE_RESERVED);
+ e820__update_table(e820_table);
}
static void __init intel_graphics_quirks(int num, int slot, int func)
diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c
index e5fb436a6548..538ec012b371 100644
--- a/arch/x86/kernel/head32.c
+++ b/arch/x86/kernel/head32.c
@@ -12,7 +12,7 @@
#include <asm/setup.h>
#include <asm/sections.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/page.h>
#include <asm/apic.h>
#include <asm/io_apic.h>
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index b5785c197e53..43b7002f44fb 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -24,7 +24,7 @@
#include <asm/tlbflush.h>
#include <asm/sections.h>
#include <asm/kdebug.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/bios_ebda.h>
#include <asm/bootparam_utils.h>
#include <asm/microcode.h>
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index b467b14b03eb..ac9d327d2e42 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -269,10 +269,8 @@ ENTRY(secondary_startup_64)
/* rsi is pointer to real mode structure with interesting info.
pass it to C */
movq %rsi, %rdi
- jmp start_cpu
-ENDPROC(secondary_startup_64)
-ENTRY(start_cpu)
+.Ljump_to_C_code:
/*
* Jump to run C code and to be on a real kernel address.
* Since we are running on identity-mapped space we have to jump
@@ -305,7 +303,7 @@ ENTRY(start_cpu)
pushq %rax # target address in negative space
lretq
.Lafter_lret:
-ENDPROC(start_cpu)
+ENDPROC(secondary_startup_64)
#include "verify_cpu.S"
@@ -313,11 +311,11 @@ ENDPROC(start_cpu)
/*
* Boot CPU0 entry point. It's called from play_dead(). Everything has been set
* up already except stack. We just set up stack here. Then call
- * start_secondary() via start_cpu().
+ * start_secondary() via .Ljump_to_C_code.
*/
ENTRY(start_cpu0)
movq initial_stack(%rip), %rsp
- jmp start_cpu
+ jmp .Ljump_to_C_code
ENDPROC(start_cpu0)
#endif
diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c
index d0a814a9d96a..9d7fd5e6689a 100644
--- a/arch/x86/kernel/kexec-bzimage64.c
+++ b/arch/x86/kernel/kexec-bzimage64.c
@@ -25,6 +25,7 @@
#include <asm/setup.h>
#include <asm/crash.h>
#include <asm/efi.h>
+#include <asm/e820/api.h>
#include <asm/kexec-bzimage64.h>
#define MAX_ELFCOREHDR_STR_LEN 30 /* elfcorehdr=0x<64bit-value> */
@@ -99,15 +100,14 @@ static int setup_e820_entries(struct boot_params *params)
{
unsigned int nr_e820_entries;
- nr_e820_entries = e820_saved->nr_map;
+ nr_e820_entries = e820_table_firmware->nr_entries;
- /* TODO: Pass entries more than E820MAX in bootparams setup data */
- if (nr_e820_entries > E820MAX)
- nr_e820_entries = E820MAX;
+ /* TODO: Pass entries more than E820_MAX_ENTRIES_ZEROPAGE in bootparams setup data */
+ if (nr_e820_entries > E820_MAX_ENTRIES_ZEROPAGE)
+ nr_e820_entries = E820_MAX_ENTRIES_ZEROPAGE;
params->e820_entries = nr_e820_entries;
- memcpy(&params->e820_map, &e820_saved->map,
- nr_e820_entries * sizeof(struct e820entry));
+ memcpy(&params->e820_table, &e820_table_firmware->entries, nr_e820_entries*sizeof(struct e820_entry));
return 0;
}
@@ -232,10 +232,10 @@ setup_boot_parameters(struct kimage *image, struct boot_params *params,
nr_e820_entries = params->e820_entries;
for (i = 0; i < nr_e820_entries; i++) {
- if (params->e820_map[i].type != E820_RAM)
+ if (params->e820_table[i].type != E820_TYPE_RAM)
continue;
- start = params->e820_map[i].addr;
- end = params->e820_map[i].addr + params->e820_map[i].size - 1;
+ start = params->e820_table[i].addr;
+ end = params->e820_table[i].addr + params->e820_table[i].size - 1;
if ((start <= 0x100000) && end > 0x100000) {
mem_k = (end >> 10) - (0x100000 >> 10);
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 0f8d20497383..0d904d759ff1 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -26,7 +26,7 @@
#include <asm/io_apic.h>
#include <asm/proto.h>
#include <asm/bios_ebda.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/setup.h>
#include <asm/smp.h>
@@ -826,10 +826,10 @@ static int __init parse_alloc_mptable_opt(char *p)
}
early_param("alloc_mptable", parse_alloc_mptable_opt);
-void __init early_reserve_e820_mpc_new(void)
+void __init e820__memblock_alloc_reserved_mpc_new(void)
{
if (enable_update_mptable && alloc_mptable)
- mpc_new_phys = early_reserve_e820(mpc_new_length, 4);
+ mpc_new_phys = e820__memblock_alloc_reserved(mpc_new_length, 4);
}
static int __init update_mp_table(void)
diff --git a/arch/x86/kernel/probe_roms.c b/arch/x86/kernel/probe_roms.c
index d5f15c3f7b25..963e3fb56437 100644
--- a/arch/x86/kernel/probe_roms.c
+++ b/arch/x86/kernel/probe_roms.c
@@ -14,7 +14,7 @@
#include <asm/probe_roms.h>
#include <asm/pci-direct.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/mmzone.h>
#include <asm/setup.h>
#include <asm/sections.h>
diff --git a/arch/x86/kernel/resource.c b/arch/x86/kernel/resource.c
index 2408c1603438..5ab3895516ac 100644
--- a/arch/x86/kernel/resource.c
+++ b/arch/x86/kernel/resource.c
@@ -1,5 +1,5 @@
#include <linux/ioport.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
static void resource_clip(struct resource *res, resource_size_t start,
resource_size_t end)
@@ -25,10 +25,10 @@ static void resource_clip(struct resource *res, resource_size_t start,
static void remove_e820_regions(struct resource *avail)
{
int i;
- struct e820entry *entry;
+ struct e820_entry *entry;
- for (i = 0; i < e820->nr_map; i++) {
- entry = &e820->map[i];
+ for (i = 0; i < e820_table->nr_entries; i++) {
+ entry = &e820_table->entries[i];
resource_clip(avail, entry->addr,
entry->addr + entry->size - 1);
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 4bf0c8926a1c..cab13f75908b 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -75,7 +75,7 @@
#include <asm/mtrr.h>
#include <asm/apic.h>
#include <asm/realmode.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/mpspec.h>
#include <asm/setup.h>
#include <asm/efi.h>
@@ -119,7 +119,7 @@
* max_low_pfn_mapped: highest direct mapped pfn under 4GB
* max_pfn_mapped: highest direct mapped pfn over 4GB
*
- * The direct mapping only covers E820_RAM regions, so the ranges and gaps are
+ * The direct mapping only covers E820_TYPE_RAM regions, so the ranges and gaps are
* represented by pfn_mapped
*/
unsigned long max_low_pfn_mapped;
@@ -426,7 +426,7 @@ static void __init parse_setup_data(void)
switch (data_type) {
case SETUP_E820_EXT:
- parse_e820_ext(pa_data, data_len);
+ e820__memory_setup_extended(pa_data, data_len);
break;
case SETUP_DTB:
add_dtb(pa_data);
@@ -441,29 +441,6 @@ static void __init parse_setup_data(void)
}
}
-static void __init e820_reserve_setup_data(void)
-{
- struct setup_data *data;
- u64 pa_data;
-
- pa_data = boot_params.hdr.setup_data;
- if (!pa_data)
- return;
-
- while (pa_data) {
- data = early_memremap(pa_data, sizeof(*data));
- e820_update_range(pa_data, sizeof(*data)+data->len,
- E820_RAM, E820_RESERVED_KERN);
- pa_data = data->next;
- early_memunmap(data, sizeof(*data));
- }
-
- sanitize_e820_map(e820->map, ARRAY_SIZE(e820->map), &e820->nr_map);
- memcpy(e820_saved, e820, sizeof(struct e820map));
- printk(KERN_INFO "extended physical RAM map:\n");
- e820_print_map("reserve setup_data");
-}
-
static void __init memblock_x86_reserve_range_setup_data(void)
{
struct setup_data *data;
@@ -756,16 +733,16 @@ static void __init trim_bios_range(void)
* since some BIOSes are known to corrupt low memory. See the
* Kconfig help text for X86_RESERVE_LOW.
*/
- e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED);
+ e820__range_update(0, PAGE_SIZE, E820_TYPE_RAM, E820_TYPE_RESERVED);
/*
* special case: Some BIOSen report the PC BIOS
* area (640->1Mb) as ram even though it is not.
* take them out.
*/
- e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
+ e820__range_remove(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_TYPE_RAM, 1);
- sanitize_e820_map(e820->map, ARRAY_SIZE(e820->map), &e820->nr_map);
+ e820__update_table(e820_table);
}
/* called before trim_bios_range() to spare extra sanitize */
@@ -775,18 +752,18 @@ static void __init e820_add_kernel_range(void)
u64 size = __pa_symbol(_end) - start;
/*
- * Complain if .text .data and .bss are not marked as E820_RAM and
+ * Complain if .text .data and .bss are not marked as E820_TYPE_RAM and
* attempt to fix it by adding the range. We may have a confused BIOS,
* or the user may have used memmap=exactmap or memmap=xxM$yyM to
* exclude kernel range. If we really are running on top non-RAM,
* we will crash later anyways.
*/
- if (e820_all_mapped(start, start + size, E820_RAM))
+ if (e820__mapped_all(start, start + size, E820_TYPE_RAM))
return;
- pr_warn(".text .data .bss are not marked as E820_RAM!\n");
- e820_remove_range(start, size, E820_RAM, 0);
- e820_add_region(start, size, E820_RAM);
+ pr_warn(".text .data .bss are not marked as E820_TYPE_RAM!\n");
+ e820__range_remove(start, size, E820_TYPE_RAM, 0);
+ e820__range_add(start, size, E820_TYPE_RAM);
}
static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10;
@@ -939,7 +916,7 @@ void __init setup_arch(char **cmdline_p)
x86_init.oem.arch_setup();
iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
- setup_memory_map();
+ e820__memory_setup();
parse_setup_data();
copy_edd();
@@ -1028,9 +1005,8 @@ void __init setup_arch(char **cmdline_p)
early_dump_pci_devices();
#endif
- /* update the e820_saved too */
- e820_reserve_setup_data();
- finish_e820_parsing();
+ e820__reserve_setup_data();
+ e820__finish_early_params();
if (efi_enabled(EFI_BOOT))
efi_init();
@@ -1056,11 +1032,11 @@ void __init setup_arch(char **cmdline_p)
trim_bios_range();
#ifdef CONFIG_X86_32
if (ppro_with_ram_bug()) {
- e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
- E820_RESERVED);
- sanitize_e820_map(e820->map, ARRAY_SIZE(e820->map), &e820->nr_map);
+ e820__range_update(0x70000000ULL, 0x40000ULL, E820_TYPE_RAM,
+ E820_TYPE_RESERVED);
+ e820__update_table(e820_table);
printk(KERN_INFO "fixed physical RAM map:\n");
- e820_print_map("bad_ppro");
+ e820__print_table("bad_ppro");
}
#else
early_gart_iommu_check();
@@ -1070,12 +1046,12 @@ void __init setup_arch(char **cmdline_p)
* partially used pages are not usable - thus
* we are rounding upwards:
*/
- max_pfn = e820_end_of_ram_pfn();
+ max_pfn = e820__end_of_ram_pfn();
/* update e820 for memory not covered by WB MTRRs */
mtrr_bp_init();
if (mtrr_trim_uncached_memory(max_pfn))
- max_pfn = e820_end_of_ram_pfn();
+ max_pfn = e820__end_of_ram_pfn();
max_possible_pfn = max_pfn;
@@ -1094,7 +1070,7 @@ void __init setup_arch(char **cmdline_p)
/* How many end-of-memory variables you have, grandma! */
/* need this before calling reserve_initrd */
if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
- max_low_pfn = e820_end_of_low_ram_pfn();
+ max_low_pfn = e820__end_of_low_ram_pfn();
else
max_low_pfn = max_pfn;
@@ -1111,7 +1087,7 @@ void __init setup_arch(char **cmdline_p)
early_alloc_pgt_buf();
/*
- * Need to conclude brk, before memblock_x86_fill()
+ * Need to conclude brk, before e820__memblock_setup()
* it could use memblock_find_in_range, could overlap with
* brk area.
*/
@@ -1120,7 +1096,7 @@ void __init setup_arch(char **cmdline_p)
cleanup_highmap();
memblock_set_current_limit(ISA_END_ADDRESS);
- memblock_x86_fill();
+ e820__memblock_setup();
reserve_bios_regions();
@@ -1137,7 +1113,7 @@ void __init setup_arch(char **cmdline_p)
}
/* preallocate 4k for mptable mpc */
- early_reserve_e820_mpc_new();
+ e820__memblock_alloc_reserved_mpc_new();
#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
setup_bios_corruption_check();
@@ -1275,12 +1251,12 @@ void __init setup_arch(char **cmdline_p)
kvm_guest_init();
- e820_reserve_resources();
- e820_mark_nosave_regions(max_low_pfn);
+ e820__reserve_resources();
+ e820__register_nosave_regions(max_low_pfn);
x86_init.resources.reserve_resources();
- e820_setup_gap();
+ e820__setup_pci_gap();
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 3cab8415389a..d798c0da451c 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -33,6 +33,7 @@
#include <asm/mce.h>
#include <asm/trace/irq_vectors.h>
#include <asm/kexec.h>
+#include <asm/virtext.h>
/*
* Some notes on x86 processor bugs affecting SMP operation:
@@ -162,6 +163,7 @@ static int smp_stop_nmi_callback(unsigned int val, struct pt_regs *regs)
if (raw_smp_processor_id() == atomic_read(&stopping_cpu))
return NMI_HANDLED;
+ cpu_emergency_vmxoff();
stop_this_cpu(NULL);
return NMI_HANDLED;
@@ -174,6 +176,7 @@ static int smp_stop_nmi_callback(unsigned int val, struct pt_regs *regs)
asmlinkage __visible void smp_reboot_interrupt(void)
{
ipi_entering_ack_irq();
+ cpu_emergency_vmxoff();
stop_this_cpu(NULL);
irq_exit();
}
diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c
index b868fa1b812b..ccccd335ae01 100644
--- a/arch/x86/kernel/tboot.c
+++ b/arch/x86/kernel/tboot.c
@@ -42,7 +42,7 @@
#include <asm/fixmap.h>
#include <asm/proto.h>
#include <asm/setup.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/io.h>
#include "../realmode/rm/wakeup.h"
@@ -68,9 +68,9 @@ void __init tboot_probe(void)
* also verify that it is mapped as we expect it before calling
* set_fixmap(), to reduce chance of garbage value causing crash
*/
- if (!e820_any_mapped(boot_params.tboot_addr,
- boot_params.tboot_addr, E820_RESERVED)) {
- pr_warning("non-0 tboot_addr but it is not of type E820_RESERVED\n");
+ if (!e820__mapped_any(boot_params.tboot_addr,
+ boot_params.tboot_addr, E820_TYPE_RESERVED)) {
+ pr_warning("non-0 tboot_addr but it is not of type E820_TYPE_RESERVED\n");
return;
}
@@ -188,12 +188,12 @@ static int tboot_setup_sleep(void)
tboot->num_mac_regions = 0;
- for (i = 0; i < e820->nr_map; i++) {
- if ((e820->map[i].type != E820_RAM)
- && (e820->map[i].type != E820_RESERVED_KERN))
+ for (i = 0; i < e820_table->nr_entries; i++) {
+ if ((e820_table->entries[i].type != E820_TYPE_RAM)
+ && (e820_table->entries[i].type != E820_TYPE_RESERVED_KERN))
continue;
- add_mac_region(e820->map[i].addr, e820->map[i].size);
+ add_mac_region(e820_table->entries[i].addr, e820_table->entries[i].size);
}
tboot->acpi_sinfo.kernel_s3_resume_vector =
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 11a93f005268..a088b2c47f73 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -14,7 +14,7 @@
#include <asm/mpspec.h>
#include <asm/setup.h>
#include <asm/apic.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/time.h>
#include <asm/irq.h>
#include <asm/io_apic.h>
@@ -38,7 +38,7 @@ struct x86_init_ops x86_init __initdata = {
.resources = {
.probe_roms = probe_roms,
.reserve_resources = reserve_standard_io_resources,
- .memory_setup = default_machine_specific_memory_setup,
+ .memory_setup = e820__memory_setup_default,
},
.mpparse = {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 21:11:05 +0000