x86/xen: split off enlighten_pvh.c

Create enlighten_pvh.c by splitting off PVH related code from enlighten.c,
put it under CONFIG_XEN_PVH.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>

3 files changed, 116 insertions, 108 deletions

diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index cb0164aee156..348128b1c55a 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -15,6 +15,8 @@ obj-y		:= enlighten.o setup.o multicalls.o mmu.o irq.o \
 			grant-table.o suspend.o platform-pci-unplug.o \
 			p2m.o apic.o pmu.o
 
+obj-$(CONFIG_XEN_PVH)			+= enlighten_pvh.o
+
 obj-$(CONFIG_EVENT_TRACING) += trace.o
 
 obj-$(CONFIG_SMP)		+= smp.o
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 7b55408ff0ab..2e392e9d83cb 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -180,20 +180,6 @@ struct tls_descs {
  */
 static DEFINE_PER_CPU(struct tls_descs, shadow_tls_desc);
 
-#ifdef CONFIG_XEN_PVH
-/*
- * PVH variables.
- *
- * xen_pvh and pvh_bootparams need to live in data segment since they
- * are used after startup_{32|64}, which clear .bss, are invoked.
- */
-bool xen_pvh __attribute__((section(".data"))) = 0;
-struct boot_params pvh_bootparams __attribute__((section(".data")));
-
-struct hvm_start_info pvh_start_info;
-unsigned int pvh_start_info_sz = sizeof(pvh_start_info);
-#endif
-
 static void clamp_max_cpus(void)
 {
 #ifdef CONFIG_SMP
@@ -1674,100 +1660,6 @@ asmlinkage __visible void __init xen_start_kernel(void)
 #endif
 }
 
-#ifdef CONFIG_XEN_PVH
-
-static void xen_pvh_arch_setup(void)
-{
-#ifdef CONFIG_ACPI
-	/* Make sure we don't fall back to (default) ACPI_IRQ_MODEL_PIC. */
-	if (nr_ioapics == 0)
-		acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
-#endif
-}
-
-static void __init init_pvh_bootparams(void)
-{
-	struct xen_memory_map memmap;
-	unsigned int i;
-	int rc;
-
-	memset(&pvh_bootparams, 0, sizeof(pvh_bootparams));
-
-	memmap.nr_entries = ARRAY_SIZE(pvh_bootparams.e820_table);
-	set_xen_guest_handle(memmap.buffer, pvh_bootparams.e820_table);
-	rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
-	if (rc) {
-		xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc);
-		BUG();
-	}
-
-	if (memmap.nr_entries < E820_MAX_ENTRIES_ZEROPAGE - 1) {
-		pvh_bootparams.e820_table[memmap.nr_entries].addr =
-			ISA_START_ADDRESS;
-		pvh_bootparams.e820_table[memmap.nr_entries].size =
-			ISA_END_ADDRESS - ISA_START_ADDRESS;
-		pvh_bootparams.e820_table[memmap.nr_entries].type =
-			E820_TYPE_RESERVED;
-		memmap.nr_entries++;
-	} else
-		xen_raw_printk("Warning: Can fit ISA range into e820\n");
-
-	pvh_bootparams.e820_entries = memmap.nr_entries;
-	for (i = 0; i < pvh_bootparams.e820_entries; i++)
-		e820__range_add(pvh_bootparams.e820_table[i].addr,
-				pvh_bootparams.e820_table[i].size,
-				pvh_bootparams.e820_table[i].type);
-
-	e820__update_table(e820_table);
-
-	pvh_bootparams.hdr.cmd_line_ptr =
-		pvh_start_info.cmdline_paddr;
-
-	/* The first module is always ramdisk. */
-	if (pvh_start_info.nr_modules) {
-		struct hvm_modlist_entry *modaddr =
-			__va(pvh_start_info.modlist_paddr);
-		pvh_bootparams.hdr.ramdisk_image = modaddr->paddr;
-		pvh_bootparams.hdr.ramdisk_size = modaddr->size;
-	}
-
-	/*
-	 * See Documentation/x86/boot.txt.
-	 *
-	 * Version 2.12 supports Xen entry point but we will use default x86/PC
-	 * environment (i.e. hardware_subarch 0).
-	 */
-	pvh_bootparams.hdr.version = 0x212;
-	pvh_bootparams.hdr.type_of_loader = (9 << 4) | 0; /* Xen loader */
-}
-
-/*
- * This routine (and those that it might call) should not use
- * anything that lives in .bss since that segment will be cleared later.
- */
-void __init xen_prepare_pvh(void)
-{
-	u32 msr;
-	u64 pfn;
-
-	if (pvh_start_info.magic != XEN_HVM_START_MAGIC_VALUE) {
-		xen_raw_printk("Error: Unexpected magic value (0x%08x)\n",
-				pvh_start_info.magic);
-		BUG();
-	}
-
-	xen_pvh = 1;
-
-	msr = cpuid_ebx(xen_cpuid_base() + 2);
-	pfn = __pa(hypercall_page);
-	wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
-
-	init_pvh_bootparams();
-
-	x86_init.oem.arch_setup = xen_pvh_arch_setup;
-}
-#endif
-
 void __ref xen_hvm_init_shared_info(void)
 {
 	int cpu;
diff --git a/arch/x86/xen/enlighten_pvh.c b/arch/x86/xen/enlighten_pvh.c
new file mode 100644
index 000000000000..a4272c8620ce
--- /dev/null
+++ b/arch/x86/xen/enlighten_pvh.c
@@ -0,0 +1,114 @@
+#include <linux/acpi.h>
+
+#include <xen/hvc-console.h>
+
+#include <asm/io_apic.h>
+#include <asm/hypervisor.h>
+#include <asm/e820/api.h>
+
+#include <asm/xen/interface.h>
+#include <asm/xen/hypercall.h>
+
+#include <xen/interface/memory.h>
+#include <xen/interface/hvm/start_info.h>
+
+/*
+ * PVH variables.
+ *
+ * xen_pvh and pvh_bootparams need to live in data segment since they
+ * are used after startup_{32|64}, which clear .bss, are invoked.
+ */
+bool xen_pvh __attribute__((section(".data"))) = 0;
+struct boot_params pvh_bootparams __attribute__((section(".data")));
+
+struct hvm_start_info pvh_start_info;
+unsigned int pvh_start_info_sz = sizeof(pvh_start_info);
+
+static void xen_pvh_arch_setup(void)
+{
+	/* Make sure we don't fall back to (default) ACPI_IRQ_MODEL_PIC. */
+	if (nr_ioapics == 0)
+		acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
+}
+
+static void __init init_pvh_bootparams(void)
+{
+	struct xen_memory_map memmap;
+	unsigned int i;
+	int rc;
+
+	memset(&pvh_bootparams, 0, sizeof(pvh_bootparams));
+
+	memmap.nr_entries = ARRAY_SIZE(pvh_bootparams.e820_table);
+	set_xen_guest_handle(memmap.buffer, pvh_bootparams.e820_table);
+	rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
+	if (rc) {
+		xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc);
+		BUG();
+	}
+
+	if (memmap.nr_entries < E820_MAX_ENTRIES_ZEROPAGE - 1) {
+		pvh_bootparams.e820_table[memmap.nr_entries].addr =
+			ISA_START_ADDRESS;
+		pvh_bootparams.e820_table[memmap.nr_entries].size =
+			ISA_END_ADDRESS - ISA_START_ADDRESS;
+		pvh_bootparams.e820_table[memmap.nr_entries].type =
+			E820_TYPE_RESERVED;
+		memmap.nr_entries++;
+	} else
+		xen_raw_printk("Warning: Can fit ISA range into e820\n");
+
+	pvh_bootparams.e820_entries = memmap.nr_entries;
+	for (i = 0; i < pvh_bootparams.e820_entries; i++)
+		e820__range_add(pvh_bootparams.e820_table[i].addr,
+				pvh_bootparams.e820_table[i].size,
+				pvh_bootparams.e820_table[i].type);
+
+	e820__update_table(e820_table);
+
+	pvh_bootparams.hdr.cmd_line_ptr =
+		pvh_start_info.cmdline_paddr;
+
+	/* The first module is always ramdisk. */
+	if (pvh_start_info.nr_modules) {
+		struct hvm_modlist_entry *modaddr =
+			__va(pvh_start_info.modlist_paddr);
+		pvh_bootparams.hdr.ramdisk_image = modaddr->paddr;
+		pvh_bootparams.hdr.ramdisk_size = modaddr->size;
+	}
+
+	/*
+	 * See Documentation/x86/boot.txt.
+	 *
+	 * Version 2.12 supports Xen entry point but we will use default x86/PC
+	 * environment (i.e. hardware_subarch 0).
+	 */
+	pvh_bootparams.hdr.version = 0x212;
+	pvh_bootparams.hdr.type_of_loader = (9 << 4) | 0; /* Xen loader */
+}
+
+/*
+ * This routine (and those that it might call) should not use
+ * anything that lives in .bss since that segment will be cleared later.
+ */
+void __init xen_prepare_pvh(void)
+{
+	u32 msr;
+	u64 pfn;
+
+	if (pvh_start_info.magic != XEN_HVM_START_MAGIC_VALUE) {
+		xen_raw_printk("Error: Unexpected magic value (0x%08x)\n",
+				pvh_start_info.magic);
+		BUG();
+	}
+
+	xen_pvh = 1;
+
+	msr = cpuid_ebx(xen_cpuid_base() + 2);
+	pfn = __pa(hypercall_page);
+	wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
+
+	init_pvh_bootparams();
+
+	x86_init.oem.arch_setup = xen_pvh_arch_setup;
+}