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-rw-r--r--arch/sparc/Kconfig2
-rw-r--r--arch/sparc/include/asm/cpudata_64.h2
-rw-r--r--arch/sparc/include/asm/dma-mapping.h4
-rw-r--r--arch/sparc/include/asm/parport.h2
-rw-r--r--arch/sparc/include/asm/thread_info_64.h4
-rw-r--r--arch/sparc/include/asm/vdso.h6
-rw-r--r--arch/sparc/include/uapi/asm/unistd.h3
-rw-r--r--arch/sparc/kernel/kgdb_32.c2
-rw-r--r--arch/sparc/kernel/kgdb_64.c2
-rw-r--r--arch/sparc/kernel/of_device_32.c4
-rw-r--r--arch/sparc/kernel/of_device_64.c3
-rw-r--r--arch/sparc/kernel/perf_event.c26
-rw-r--r--arch/sparc/kernel/rtrap_64.S3
-rw-r--r--arch/sparc/kernel/systbls_32.S2
-rw-r--r--arch/sparc/kernel/systbls_64.S4
-rw-r--r--arch/sparc/kernel/time_64.c3
-rw-r--r--arch/sparc/kernel/viohs.c12
-rw-r--r--arch/sparc/vdso/Makefile41
-rw-r--r--arch/sparc/vdso/checkundef.sh10
-rw-r--r--arch/sparc/vdso/vclock_gettime.c112
-rw-r--r--arch/sparc/vdso/vdso-layout.lds.S7
-rw-r--r--arch/sparc/vdso/vdso2c.c6
-rw-r--r--arch/sparc/vdso/vdso2c.h18
-rw-r--r--arch/sparc/vdso/vma.c43
24 files changed, 190 insertions, 131 deletions
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index e6f2a38d2e61..7e2aa59fcc29 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -51,7 +51,7 @@ config SPARC
config SPARC32
def_bool !64BIT
select ARCH_HAS_SYNC_DMA_FOR_CPU
- select DMA_NONCOHERENT_OPS
+ select DMA_DIRECT_OPS
select GENERIC_ATOMIC64
select CLZ_TAB
select HAVE_UID16
diff --git a/arch/sparc/include/asm/cpudata_64.h b/arch/sparc/include/asm/cpudata_64.h
index 666d6b5c0440..9c3fc03abe9a 100644
--- a/arch/sparc/include/asm/cpudata_64.h
+++ b/arch/sparc/include/asm/cpudata_64.h
@@ -28,7 +28,7 @@ typedef struct {
unsigned short sock_id; /* physical package */
unsigned short core_id;
unsigned short max_cache_id; /* groupings of highest shared cache */
- unsigned short proc_id; /* strand (aka HW thread) id */
+ signed short proc_id; /* strand (aka HW thread) id */
} cpuinfo_sparc;
DECLARE_PER_CPU(cpuinfo_sparc, __cpu_data);
diff --git a/arch/sparc/include/asm/dma-mapping.h b/arch/sparc/include/asm/dma-mapping.h
index e17566376934..b0bb2fcaf1c9 100644
--- a/arch/sparc/include/asm/dma-mapping.h
+++ b/arch/sparc/include/asm/dma-mapping.h
@@ -14,11 +14,11 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
#ifdef CONFIG_SPARC_LEON
if (sparc_cpu_model == sparc_leon)
- return &dma_noncoherent_ops;
+ return &dma_direct_ops;
#endif
#if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
if (bus == &pci_bus_type)
- return &dma_noncoherent_ops;
+ return &dma_direct_ops;
#endif
return dma_ops;
}
diff --git a/arch/sparc/include/asm/parport.h b/arch/sparc/include/asm/parport.h
index 05df5f043053..3c5a1c620f0f 100644
--- a/arch/sparc/include/asm/parport.h
+++ b/arch/sparc/include/asm/parport.h
@@ -21,6 +21,7 @@
*/
#define HAS_DMA
+#ifdef CONFIG_PARPORT_PC_FIFO
static DEFINE_SPINLOCK(dma_spin_lock);
#define claim_dma_lock() \
@@ -31,6 +32,7 @@ static DEFINE_SPINLOCK(dma_spin_lock);
#define release_dma_lock(__flags) \
spin_unlock_irqrestore(&dma_spin_lock, __flags);
+#endif
static struct sparc_ebus_info {
struct ebus_dma_info info;
diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h
index 7fb676360928..20255471e653 100644
--- a/arch/sparc/include/asm/thread_info_64.h
+++ b/arch/sparc/include/asm/thread_info_64.h
@@ -121,8 +121,12 @@ struct thread_info {
}
/* how to get the thread information struct from C */
+#ifndef BUILD_VDSO
register struct thread_info *current_thread_info_reg asm("g6");
#define current_thread_info() (current_thread_info_reg)
+#else
+extern struct thread_info *current_thread_info(void);
+#endif
/* thread information allocation */
#if PAGE_SHIFT == 13
diff --git a/arch/sparc/include/asm/vdso.h b/arch/sparc/include/asm/vdso.h
index 93b628731a5e..56836eb01787 100644
--- a/arch/sparc/include/asm/vdso.h
+++ b/arch/sparc/include/asm/vdso.h
@@ -8,10 +8,10 @@
struct vdso_image {
void *data;
unsigned long size; /* Always a multiple of PAGE_SIZE */
+
+ unsigned long tick_patch, tick_patch_len;
+
long sym_vvar_start; /* Negative offset to the vvar area */
- long sym_vread_tick; /* Start of vread_tick section */
- long sym_vread_tick_patch_start; /* Start of tick read */
- long sym_vread_tick_patch_end; /* End of tick read */
};
#ifdef CONFIG_SPARC64
diff --git a/arch/sparc/include/uapi/asm/unistd.h b/arch/sparc/include/uapi/asm/unistd.h
index 09acf0ddec10..45b4bf1875e6 100644
--- a/arch/sparc/include/uapi/asm/unistd.h
+++ b/arch/sparc/include/uapi/asm/unistd.h
@@ -427,8 +427,9 @@
#define __NR_preadv2 358
#define __NR_pwritev2 359
#define __NR_statx 360
+#define __NR_io_pgetevents 361
-#define NR_syscalls 361
+#define NR_syscalls 362
/* Bitmask values returned from kern_features system call. */
#define KERN_FEATURE_MIXED_MODE_STACK 0x00000001
diff --git a/arch/sparc/kernel/kgdb_32.c b/arch/sparc/kernel/kgdb_32.c
index 5868fc333ea8..639c8e54530a 100644
--- a/arch/sparc/kernel/kgdb_32.c
+++ b/arch/sparc/kernel/kgdb_32.c
@@ -122,7 +122,7 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
linux_regs->pc = addr;
linux_regs->npc = addr + 4;
}
- /* fallthru */
+ /* fall through */
case 'D':
case 'k':
diff --git a/arch/sparc/kernel/kgdb_64.c b/arch/sparc/kernel/kgdb_64.c
index d5f7dc6323d5..a68bbddbdba4 100644
--- a/arch/sparc/kernel/kgdb_64.c
+++ b/arch/sparc/kernel/kgdb_64.c
@@ -148,7 +148,7 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
linux_regs->tpc = addr;
linux_regs->tnpc = addr + 4;
}
- /* fallthru */
+ /* fall through */
case 'D':
case 'k':
diff --git a/arch/sparc/kernel/of_device_32.c b/arch/sparc/kernel/of_device_32.c
index 3641a294ed54..e4abe9b8f97a 100644
--- a/arch/sparc/kernel/of_device_32.c
+++ b/arch/sparc/kernel/of_device_32.c
@@ -9,6 +9,7 @@
#include <linux/irq.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
+#include <linux/dma-mapping.h>
#include <asm/leon.h>
#include <asm/leon_amba.h>
@@ -381,6 +382,9 @@ static struct platform_device * __init scan_one_device(struct device_node *dp,
else
dev_set_name(&op->dev, "%08x", dp->phandle);
+ op->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ op->dev.dma_mask = &op->dev.coherent_dma_mask;
+
if (of_device_register(op)) {
printk("%s: Could not register of device.\n",
dp->full_name);
diff --git a/arch/sparc/kernel/of_device_64.c b/arch/sparc/kernel/of_device_64.c
index 44e4d4435bed..6df6086968c6 100644
--- a/arch/sparc/kernel/of_device_64.c
+++ b/arch/sparc/kernel/of_device_64.c
@@ -2,6 +2,7 @@
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/of.h>
+#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/export.h>
#include <linux/mod_devicetable.h>
@@ -675,6 +676,8 @@ static struct platform_device * __init scan_one_device(struct device_node *dp,
dev_set_name(&op->dev, "root");
else
dev_set_name(&op->dev, "%08x", dp->phandle);
+ op->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ op->dev.dma_mask = &op->dev.coherent_dma_mask;
if (of_device_register(op)) {
printk("%s: Could not register of device.\n",
diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index d3149baaa33c..67b3e6b3ce5d 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -24,6 +24,7 @@
#include <asm/cpudata.h>
#include <linux/uaccess.h>
#include <linux/atomic.h>
+#include <linux/sched/clock.h>
#include <asm/nmi.h>
#include <asm/pcr.h>
#include <asm/cacheflush.h>
@@ -927,6 +928,8 @@ static void read_in_all_counters(struct cpu_hw_events *cpuc)
sparc_perf_event_update(cp, &cp->hw,
cpuc->current_idx[i]);
cpuc->current_idx[i] = PIC_NO_INDEX;
+ if (cp->hw.state & PERF_HES_STOPPED)
+ cp->hw.state |= PERF_HES_ARCH;
}
}
}
@@ -959,10 +962,12 @@ static void calculate_single_pcr(struct cpu_hw_events *cpuc)
enc = perf_event_get_enc(cpuc->events[i]);
cpuc->pcr[0] &= ~mask_for_index(idx);
- if (hwc->state & PERF_HES_STOPPED)
+ if (hwc->state & PERF_HES_ARCH) {
cpuc->pcr[0] |= nop_for_index(idx);
- else
+ } else {
cpuc->pcr[0] |= event_encoding(enc, idx);
+ hwc->state = 0;
+ }
}
out:
cpuc->pcr[0] |= cpuc->event[0]->hw.config_base;
@@ -988,6 +993,9 @@ static void calculate_multiple_pcrs(struct cpu_hw_events *cpuc)
cpuc->current_idx[i] = idx;
+ if (cp->hw.state & PERF_HES_ARCH)
+ continue;
+
sparc_pmu_start(cp, PERF_EF_RELOAD);
}
out:
@@ -1079,6 +1087,8 @@ static void sparc_pmu_start(struct perf_event *event, int flags)
event->hw.state = 0;
sparc_pmu_enable_event(cpuc, &event->hw, idx);
+
+ perf_event_update_userpage(event);
}
static void sparc_pmu_stop(struct perf_event *event, int flags)
@@ -1371,9 +1381,9 @@ static int sparc_pmu_add(struct perf_event *event, int ef_flags)
cpuc->events[n0] = event->hw.event_base;
cpuc->current_idx[n0] = PIC_NO_INDEX;
- event->hw.state = PERF_HES_UPTODATE;
+ event->hw.state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
if (!(ef_flags & PERF_EF_START))
- event->hw.state |= PERF_HES_STOPPED;
+ event->hw.state |= PERF_HES_ARCH;
/*
* If group events scheduling transaction was started,
@@ -1603,6 +1613,8 @@ static int __kprobes perf_event_nmi_handler(struct notifier_block *self,
struct perf_sample_data data;
struct cpu_hw_events *cpuc;
struct pt_regs *regs;
+ u64 finish_clock;
+ u64 start_clock;
int i;
if (!atomic_read(&active_events))
@@ -1616,6 +1628,8 @@ static int __kprobes perf_event_nmi_handler(struct notifier_block *self,
return NOTIFY_DONE;
}
+ start_clock = sched_clock();
+
regs = args->regs;
cpuc = this_cpu_ptr(&cpu_hw_events);
@@ -1654,6 +1668,10 @@ static int __kprobes perf_event_nmi_handler(struct notifier_block *self,
sparc_pmu_stop(event, 0);
}
+ finish_clock = sched_clock();
+
+ perf_sample_event_took(finish_clock - start_clock);
+
return NOTIFY_STOP;
}
diff --git a/arch/sparc/kernel/rtrap_64.S b/arch/sparc/kernel/rtrap_64.S
index f6528884a2c8..4073e2b87dd0 100644
--- a/arch/sparc/kernel/rtrap_64.S
+++ b/arch/sparc/kernel/rtrap_64.S
@@ -84,8 +84,9 @@ __handle_signal:
ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
sethi %hi(0xf << 20), %l4
and %l1, %l4, %l4
+ andn %l1, %l4, %l1
ba,pt %xcc, __handle_preemption_continue
- andn %l1, %l4, %l1
+ srl %l4, 20, %l4
/* When returning from a NMI (%pil==15) interrupt we want to
* avoid running softirqs, doing IRQ tracing, preempting, etc.
diff --git a/arch/sparc/kernel/systbls_32.S b/arch/sparc/kernel/systbls_32.S
index 12bee14b552c..621a363098ec 100644
--- a/arch/sparc/kernel/systbls_32.S
+++ b/arch/sparc/kernel/systbls_32.S
@@ -90,4 +90,4 @@ sys_call_table:
/*345*/ .long sys_renameat2, sys_seccomp, sys_getrandom, sys_memfd_create, sys_bpf
/*350*/ .long sys_execveat, sys_membarrier, sys_userfaultfd, sys_bind, sys_listen
/*355*/ .long sys_setsockopt, sys_mlock2, sys_copy_file_range, sys_preadv2, sys_pwritev2
-/*360*/ .long sys_statx
+/*360*/ .long sys_statx, sys_io_pgetevents
diff --git a/arch/sparc/kernel/systbls_64.S b/arch/sparc/kernel/systbls_64.S
index 387ef993880a..bb68c805b891 100644
--- a/arch/sparc/kernel/systbls_64.S
+++ b/arch/sparc/kernel/systbls_64.S
@@ -91,7 +91,7 @@ sys_call_table32:
.word sys_renameat2, sys_seccomp, sys_getrandom, sys_memfd_create, sys_bpf
/*350*/ .word sys32_execveat, sys_membarrier, sys_userfaultfd, sys_bind, sys_listen
.word compat_sys_setsockopt, sys_mlock2, sys_copy_file_range, compat_sys_preadv2, compat_sys_pwritev2
-/*360*/ .word sys_statx
+/*360*/ .word sys_statx, compat_sys_io_pgetevents
#endif /* CONFIG_COMPAT */
@@ -173,4 +173,4 @@ sys_call_table:
.word sys_renameat2, sys_seccomp, sys_getrandom, sys_memfd_create, sys_bpf
/*350*/ .word sys64_execveat, sys_membarrier, sys_userfaultfd, sys_bind, sys_listen
.word sys_setsockopt, sys_mlock2, sys_copy_file_range, sys_preadv2, sys_pwritev2
-/*360*/ .word sys_statx
+/*360*/ .word sys_statx, sys_io_pgetevents
diff --git a/arch/sparc/kernel/time_64.c b/arch/sparc/kernel/time_64.c
index f0eba72aa1ad..5f356dc8e178 100644
--- a/arch/sparc/kernel/time_64.c
+++ b/arch/sparc/kernel/time_64.c
@@ -53,8 +53,6 @@
DEFINE_SPINLOCK(rtc_lock);
-unsigned int __read_mostly vdso_fix_stick;
-
#ifdef CONFIG_SMP
unsigned long profile_pc(struct pt_regs *regs)
{
@@ -838,7 +836,6 @@ void __init time_init_early(void)
} else {
init_tick_ops(&tick_operations);
clocksource_tick.archdata.vclock_mode = VCLOCK_TICK;
- vdso_fix_stick = 1;
}
} else {
init_tick_ops(&stick_operations);
diff --git a/arch/sparc/kernel/viohs.c b/arch/sparc/kernel/viohs.c
index 635d67ffc9a3..7db5aabe9708 100644
--- a/arch/sparc/kernel/viohs.c
+++ b/arch/sparc/kernel/viohs.c
@@ -180,11 +180,17 @@ static int send_dreg(struct vio_driver_state *vio)
struct vio_dring_register pkt;
char all[sizeof(struct vio_dring_register) +
(sizeof(struct ldc_trans_cookie) *
- dr->ncookies)];
+ VIO_MAX_RING_COOKIES)];
} u;
+ size_t bytes = sizeof(struct vio_dring_register) +
+ (sizeof(struct ldc_trans_cookie) *
+ dr->ncookies);
int i;
- memset(&u, 0, sizeof(u));
+ if (WARN_ON(bytes > sizeof(u)))
+ return -EINVAL;
+
+ memset(&u, 0, bytes);
init_tag(&u.pkt.tag, VIO_TYPE_CTRL, VIO_SUBTYPE_INFO, VIO_DRING_REG);
u.pkt.dring_ident = 0;
u.pkt.num_descr = dr->num_entries;
@@ -206,7 +212,7 @@ static int send_dreg(struct vio_driver_state *vio)
(unsigned long long) u.pkt.cookies[i].cookie_size);
}
- return send_ctrl(vio, &u.pkt.tag, sizeof(u));
+ return send_ctrl(vio, &u.pkt.tag, bytes);
}
static int send_rdx(struct vio_driver_state *vio)
diff --git a/arch/sparc/vdso/Makefile b/arch/sparc/vdso/Makefile
index dd0b5a92ffd0..a6e18ca4cc18 100644
--- a/arch/sparc/vdso/Makefile
+++ b/arch/sparc/vdso/Makefile
@@ -31,23 +31,19 @@ obj-y += $(vdso_img_objs)
targets += $(vdso_img_cfiles)
targets += $(vdso_img_sodbg) $(vdso_img-y:%=vdso%.so)
-export CPPFLAGS_vdso.lds += -P -C
+CPPFLAGS_vdso.lds += -P -C
-VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
- -Wl,--no-undefined \
- -Wl,-z,max-page-size=8192 -Wl,-z,common-page-size=8192 \
- $(DISABLE_LTO)
+VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname linux-vdso.so.1 --no-undefined \
+ -z max-page-size=8192 -z common-page-size=8192
-$(obj)/vdso64.so.dbg: $(src)/vdso.lds $(vobjs) FORCE
+$(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
$(call if_changed,vdso)
HOST_EXTRACFLAGS += -I$(srctree)/tools/include
hostprogs-y += vdso2c
quiet_cmd_vdso2c = VDSO2C $@
-define cmd_vdso2c
- $(obj)/vdso2c $< $(<:%.dbg=%) $@
-endef
+ cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@
$(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
$(call if_changed,vdso2c)
@@ -56,13 +52,14 @@ $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
# Don't omit frame pointers for ease of userspace debugging, but do
# optimize sibling calls.
#
-CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables \
- -m64 -ffixed-g2 -ffixed-g3 -fcall-used-g4 -fcall-used-g5 -ffixed-g6 \
- -ffixed-g7 $(filter -g%,$(KBUILD_CFLAGS)) \
- $(call cc-option, -fno-stack-protector) -fno-omit-frame-pointer \
- -foptimize-sibling-calls -DBUILD_VDSO
+CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables -m64 \
+ $(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
+ -fno-omit-frame-pointer -foptimize-sibling-calls \
+ -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
+
+SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcall-used-g5 -fcall-used-g7
-$(vobjs): KBUILD_CFLAGS += $(CFL)
+$(vobjs): KBUILD_CFLAGS := $(filter-out $(GCC_PLUGINS_CFLAGS) $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS)) $(CFL)
#
# vDSO code runs in userspace and -pg doesn't help with profiling anyway.
@@ -75,7 +72,7 @@ $(obj)/%.so: $(obj)/%.so.dbg
$(call if_changed,objcopy)
CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds)
-VDSO_LDFLAGS_vdso32.lds = -m32 -Wl,-m,elf32_sparc,-soname=linux-gate.so.1
+VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -soname linux-gate.so.1
#This makes sure the $(obj) subdirectory exists even though vdso32/
#is not a kbuild sub-make subdirectory
@@ -93,7 +90,8 @@ KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32))
KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32))
KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
-KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic -mno-app-regs -ffixed-g7
+KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS_32))
+KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic
KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector)
KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
@@ -111,12 +109,13 @@ $(obj)/vdso32.so.dbg: FORCE \
# The DSO images are built using a special linker script.
#
quiet_cmd_vdso = VDSO $@
- cmd_vdso = $(CC) -nostdlib -o $@ \
+ cmd_vdso = $(LD) -nostdlib -o $@ \
$(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
- -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^)
+ -T $(filter %.lds,$^) $(filter %.o,$^) && \
+ sh $(srctree)/$(src)/checkundef.sh '$(OBJDUMP)' '$@'
-VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \
- $(call cc-ldoption, -Wl$(comma)--build-id) -Wl,-Bsymbolic
+VDSO_LDFLAGS = -shared $(call ld-option, --hash-style=both) \
+ $(call ld-option, --build-id) -Bsymbolic
GCOV_PROFILE := n
#
diff --git a/arch/sparc/vdso/checkundef.sh b/arch/sparc/vdso/checkundef.sh
new file mode 100644
index 000000000000..2d85876ffc32
--- /dev/null
+++ b/arch/sparc/vdso/checkundef.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+objdump="$1"
+file="$2"
+$objdump -t "$file" | grep '*UUND*' | grep -v '#scratch' > /dev/null 2>&1
+if [ $? -eq 1 ]; then
+ exit 0
+else
+ echo "$file: undefined symbols found" >&2
+ exit 1
+fi
diff --git a/arch/sparc/vdso/vclock_gettime.c b/arch/sparc/vdso/vclock_gettime.c
index 3feb3d960ca5..7b539ceebe13 100644
--- a/arch/sparc/vdso/vclock_gettime.c
+++ b/arch/sparc/vdso/vclock_gettime.c
@@ -12,11 +12,6 @@
* Copyright (c) 2017 Oracle and/or its affiliates. All rights reserved.
*/
-/* Disable profiling for userspace code: */
-#ifndef DISABLE_BRANCH_PROFILING
-#define DISABLE_BRANCH_PROFILING
-#endif
-
#include <linux/kernel.h>
#include <linux/time.h>
#include <linux/string.h>
@@ -26,16 +21,19 @@
#include <asm/clocksource.h>
#include <asm/vvar.h>
-#undef TICK_PRIV_BIT
#ifdef CONFIG_SPARC64
-#define TICK_PRIV_BIT (1UL << 63)
-#else
-#define TICK_PRIV_BIT (1ULL << 63)
-#endif
-
#define SYSCALL_STRING \
"ta 0x6d;" \
- "sub %%g0, %%o0, %%o0;" \
+ "bcs,a 1f;" \
+ " sub %%g0, %%o0, %%o0;" \
+ "1:"
+#else
+#define SYSCALL_STRING \
+ "ta 0x10;" \
+ "bcs,a 1f;" \
+ " sub %%g0, %%o0, %%o0;" \
+ "1:"
+#endif
#define SYSCALL_CLOBBERS \
"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
@@ -50,24 +48,22 @@
* Compute the vvar page's address in the process address space, and return it
* as a pointer to the vvar_data.
*/
-static notrace noinline struct vvar_data *
-get_vvar_data(void)
+notrace static __always_inline struct vvar_data *get_vvar_data(void)
{
unsigned long ret;
/*
- * vdso data page is the first vDSO page so grab the return address
+ * vdso data page is the first vDSO page so grab the PC
* and move up a page to get to the data page.
*/
- ret = (unsigned long)__builtin_return_address(0);
+ __asm__("rd %%pc, %0" : "=r" (ret));
ret &= ~(8192 - 1);
ret -= 8192;
return (struct vvar_data *) ret;
}
-static notrace long
-vdso_fallback_gettime(long clock, struct timespec *ts)
+notrace static long vdso_fallback_gettime(long clock, struct timespec *ts)
{
register long num __asm__("g1") = __NR_clock_gettime;
register long o0 __asm__("o0") = clock;
@@ -78,8 +74,7 @@ vdso_fallback_gettime(long clock, struct timespec *ts)
return o0;
}
-static notrace __always_inline long
-vdso_fallback_gettimeofday(struct timeval *tv, struct timezone *tz)
+notrace static long vdso_fallback_gettimeofday(struct timeval *tv, struct timezone *tz)
{
register long num __asm__("g1") = __NR_gettimeofday;
register long o0 __asm__("o0") = (long) tv;
@@ -91,38 +86,43 @@ vdso_fallback_gettimeofday(struct timeval *tv, struct timezone *tz)
}
#ifdef CONFIG_SPARC64
-static notrace noinline u64
-vread_tick(void) {
+notrace static __always_inline u64 vread_tick(void)
+{
u64 ret;
- __asm__ __volatile__("rd %%asr24, %0 \n"
- ".section .vread_tick_patch, \"ax\" \n"
- "rd %%tick, %0 \n"
- ".previous \n"
- : "=&r" (ret));
- return ret & ~TICK_PRIV_BIT;
+ __asm__ __volatile__("1:\n\t"
+ "rd %%tick, %0\n\t"
+ ".pushsection .tick_patch, \"a\"\n\t"
+ ".word 1b - ., 1f - .\n\t"
+ ".popsection\n\t"
+ ".pushsection .tick_patch_replacement, \"ax\"\n\t"
+ "1:\n\t"
+ "rd %%asr24, %0\n\t"
+ ".popsection\n"
+ : "=r" (ret));
+ return ret;
}
#else
-static notrace noinline u64
-vread_tick(void)
+notrace static __always_inline u64 vread_tick(void)
{
- unsigned int lo, hi;
-
- __asm__ __volatile__("rd %%asr24, %%g1\n\t"
- "srlx %%g1, 32, %1\n\t"
- "srl %%g1, 0, %0\n"
- ".section .vread_tick_patch, \"ax\" \n"
- "rd %%tick, %%g1\n"
- ".previous \n"
- : "=&r" (lo), "=&r" (hi)
- :
- : "g1");
- return lo | ((u64)hi << 32);
+ register unsigned long long ret asm("o4");
+
+ __asm__ __volatile__("1:\n\t"
+ "rd %%tick, %L0\n\t"
+ "srlx %L0, 32, %H0\n\t"
+ ".pushsection .tick_patch, \"a\"\n\t"
+ ".word 1b - ., 1f - .\n\t"
+ ".popsection\n\t"
+ ".pushsection .tick_patch_replacement, \"ax\"\n\t"
+ "1:\n\t"
+ "rd %%asr24, %L0\n\t"
+ ".popsection\n"
+ : "=r" (ret));
+ return ret;
}
#endif
-static notrace inline u64
-vgetsns(struct vvar_data *vvar)
+notrace static __always_inline u64 vgetsns(struct vvar_data *vvar)
{
u64 v;
u64 cycles;
@@ -132,13 +132,12 @@ vgetsns(struct vvar_data *vvar)
return v * vvar->clock.mult;
}
-static notrace noinline int
-do_realtime(struct vvar_data *vvar, struct timespec *ts)
+notrace static __always_inline int do_realtime(struct vvar_data *vvar,
+ struct timespec *ts)
{
unsigned long seq;
u64 ns;
- ts->tv_nsec = 0;
do {
seq = vvar_read_begin(vvar);
ts->tv_sec = vvar->wall_time_sec;
@@ -147,18 +146,18 @@ do_realtime(struct vvar_data *vvar, struct timespec *ts)
ns >>= vvar->clock.shift;
} while (unlikely(vvar_read_retry(vvar, seq)));
- timespec_add_ns(ts, ns);
+ ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns);
+ ts->tv_nsec = ns;
return 0;
}
-static notrace noinline int
-do_monotonic(struct vvar_data *vvar, struct timespec *ts)
+notrace static __always_inline int do_monotonic(struct vvar_data *vvar,
+ struct timespec *ts)
{
unsigned long seq;
u64 ns;
- ts->tv_nsec = 0;
do {
seq = vvar_read_begin(vvar);
ts->tv_sec = vvar->monotonic_time_sec;
@@ -167,13 +166,14 @@ do_monotonic(struct vvar_data *vvar, struct timespec *ts)
ns >>= vvar->clock.shift;
} while (unlikely(vvar_read_retry(vvar, seq)));
- timespec_add_ns(ts, ns);
+ ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns);
+ ts->tv_nsec = ns;
return 0;
}
-static notrace noinline int
-do_realtime_coarse(struct vvar_data *vvar, struct timespec *ts)
+notrace static int do_realtime_coarse(struct vvar_data *vvar,
+ struct timespec *ts)
{
unsigned long seq;
@@ -185,8 +185,8 @@ do_realtime_coarse(struct vvar_data *vvar, struct timespec *ts)
return 0;
}
-static notrace noinline int
-do_monotonic_coarse(struct vvar_data *vvar, struct timespec *ts)
+notrace static int do_monotonic_coarse(struct vvar_data *vvar,
+ struct timespec *ts)
{
unsigned long seq;
diff --git a/arch/sparc/vdso/vdso-layout.lds.S b/arch/sparc/vdso/vdso-layout.lds.S
index f2c83abaca12..ed36d49e1617 100644
--- a/arch/sparc/vdso/vdso-layout.lds.S
+++ b/arch/sparc/vdso/vdso-layout.lds.S
@@ -73,11 +73,8 @@ SECTIONS
.text : { *(.text*) } :text =0x90909090,
- .vread_tick_patch : {
- vread_tick_patch_start = .;
- *(.vread_tick_patch)
- vread_tick_patch_end = .;
- }
+ .tick_patch : { *(.tick_patch) } :text
+ .tick_patch_insns : { *(.tick_patch_insns) } :text
/DISCARD/ : {
*(.discard)
diff --git a/arch/sparc/vdso/vdso2c.c b/arch/sparc/vdso/vdso2c.c
index 9f5b1cd6d51d..ab7504176a7f 100644
--- a/arch/sparc/vdso/vdso2c.c
+++ b/arch/sparc/vdso/vdso2c.c
@@ -63,9 +63,6 @@ enum {
sym_vvar_start,
sym_VDSO_FAKE_SECTION_TABLE_START,
sym_VDSO_FAKE_SECTION_TABLE_END,
- sym_vread_tick,
- sym_vread_tick_patch_start,
- sym_vread_tick_patch_end
};
struct vdso_sym {
@@ -81,9 +78,6 @@ struct vdso_sym required_syms[] = {
[sym_VDSO_FAKE_SECTION_TABLE_END] = {
"VDSO_FAKE_SECTION_TABLE_END", 0
},
- [sym_vread_tick] = {"vread_tick", 1},
- [sym_vread_tick_patch_start] = {"vread_tick_patch_start", 1},
- [sym_vread_tick_patch_end] = {"vread_tick_patch_end", 1}
};
__attribute__((format(printf, 1, 2))) __attribute__((noreturn))
diff --git a/arch/sparc/vdso/vdso2c.h b/arch/sparc/vdso/vdso2c.h
index 808decb0f7be..4df005cf98c0 100644
--- a/arch/sparc/vdso/vdso2c.h
+++ b/arch/sparc/vdso/vdso2c.h
@@ -17,10 +17,11 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len,
unsigned long mapping_size;
int i;
unsigned long j;
-
- ELF(Shdr) *symtab_hdr = NULL, *strtab_hdr;
+ ELF(Shdr) *symtab_hdr = NULL, *strtab_hdr, *secstrings_hdr,
+ *patch_sec = NULL;
ELF(Ehdr) *hdr = (ELF(Ehdr) *)raw_addr;
ELF(Dyn) *dyn = 0, *dyn_end = 0;
+ const char *secstrings;
INT_BITS syms[NSYMS] = {};
ELF(Phdr) *pt = (ELF(Phdr) *)(raw_addr + GET_BE(&hdr->e_phoff));
@@ -63,11 +64,18 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len,
}
/* Walk the section table */
+ secstrings_hdr = raw_addr + GET_BE(&hdr->e_shoff) +
+ GET_BE(&hdr->e_shentsize)*GET_BE(&hdr->e_shstrndx);
+ secstrings = raw_addr + GET_BE(&secstrings_hdr->sh_offset);
for (i = 0; i < GET_BE(&hdr->e_shnum); i++) {
ELF(Shdr) *sh = raw_addr + GET_BE(&hdr->e_shoff) +
GET_BE(&hdr->e_shentsize) * i;
if (GET_BE(&sh->sh_type) == SHT_SYMTAB)
symtab_hdr = sh;
+
+ if (!strcmp(secstrings + GET_BE(&sh->sh_name),
+ ".tick_patch"))
+ patch_sec = sh;
}
if (!symtab_hdr)
@@ -134,6 +142,12 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len,
fprintf(outfile, "const struct vdso_image %s_builtin = {\n", name);
fprintf(outfile, "\t.data = raw_data,\n");
fprintf(outfile, "\t.size = %lu,\n", mapping_size);
+ if (patch_sec) {
+ fprintf(outfile, "\t.tick_patch = %lu,\n",
+ (unsigned long)GET_BE(&patch_sec->sh_offset));
+ fprintf(outfile, "\t.tick_patch_len = %lu,\n",
+ (unsigned long)GET_BE(&patch_sec->sh_size));
+ }
for (i = 0; i < NSYMS; i++) {
if (required_syms[i].export && syms[i])
fprintf(outfile, "\t.sym_%s = %" PRIi64 ",\n",
diff --git a/arch/sparc/vdso/vma.c b/arch/sparc/vdso/vma.c
index f51595f861b8..8874a27d8adc 100644
--- a/arch/sparc/vdso/vma.c
+++ b/arch/sparc/vdso/vma.c
@@ -16,6 +16,8 @@
#include <linux/linkage.h>
#include <linux/random.h>
#include <linux/elf.h>
+#include <asm/cacheflush.h>
+#include <asm/spitfire.h>
#include <asm/vdso.h>
#include <asm/vvar.h>
#include <asm/page.h>
@@ -40,7 +42,25 @@ static struct vm_special_mapping vdso_mapping32 = {
struct vvar_data *vvar_data;
-#define SAVE_INSTR_SIZE 4
+struct tick_patch_entry {
+ s32 orig, repl;
+};
+
+static void stick_patch(const struct vdso_image *image)
+{
+ struct tick_patch_entry *p, *p_end;
+
+ p = image->data + image->tick_patch;
+ p_end = (void *)p + image->tick_patch_len;
+ while (p < p_end) {
+ u32 *instr = (void *)&p->orig + p->orig;
+ u32 *repl = (void *)&p->repl + p->repl;
+
+ *instr = *repl;
+ flushi(instr);
+ p++;
+ }
+}
/*
* Allocate pages for the vdso and vvar, and copy in the vdso text from the
@@ -68,21 +88,8 @@ int __init init_vdso_image(const struct vdso_image *image,
if (!cpp)
goto oom;
- if (vdso_fix_stick) {
- /*
- * If the system uses %tick instead of %stick, patch the VDSO
- * with instruction reading %tick instead of %stick.
- */
- unsigned int j, k = SAVE_INSTR_SIZE;
- unsigned char *data = image->data;
-
- for (j = image->sym_vread_tick_patch_start;
- j < image->sym_vread_tick_patch_end; j++) {
-
- data[image->sym_vread_tick + k] = data[j];
- k++;
- }
- }
+ if (tlb_type != spitfire)
+ stick_patch(image);
for (i = 0; i < cnpages; i++) {
cp = alloc_page(GFP_KERNEL);
@@ -262,7 +269,9 @@ static __init int vdso_setup(char *s)
unsigned long val;
err = kstrtoul(s, 10, &val);
+ if (err)
+ return err;
vdso_enabled = val;
- return err;
+ return 0;
}
__setup("vdso=", vdso_setup);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 04:42:52 +0000