summaryrefslogtreecommitdiffstats
path: root/arch/arm/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r--arch/arm/kernel/entry-header.S2
-rw-r--r--arch/arm/kernel/irq.c1
-rw-r--r--arch/arm/kernel/kgdb.c13
-rw-r--r--arch/arm/kernel/kprobes.c11
-rw-r--r--arch/arm/kernel/module.c2
-rw-r--r--arch/arm/kernel/perf_event.c9
-rw-r--r--arch/arm/kernel/process.c1
-rw-r--r--arch/arm/kernel/signal.c93
-rw-r--r--arch/arm/kernel/smp.c4
-rw-r--r--arch/arm/kernel/sys_arm.c2
10 files changed, 124 insertions, 14 deletions
diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S
index 7e9ed1eea40a..d93f976fb389 100644
--- a/arch/arm/kernel/entry-header.S
+++ b/arch/arm/kernel/entry-header.S
@@ -102,6 +102,8 @@
.else
ldmdb sp, {r0 - lr}^ @ get calling r0 - lr
.endif
+ mov r0, r0 @ ARMv5T and earlier require a nop
+ @ after ldm {}^
add sp, sp, #S_FRAME_SIZE - S_PC
movs pc, lr @ return & move spsr_svc into cpsr
.endm
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index b7cb45bb91e8..3b3d2c80509c 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -27,7 +27,6 @@
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
-#include <linux/slab.h>
#include <linux/random.h>
#include <linux/smp.h>
#include <linux/init.h>
diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c
index ba8ccfede964..a5b846b9895d 100644
--- a/arch/arm/kernel/kgdb.c
+++ b/arch/arm/kernel/kgdb.c
@@ -9,6 +9,7 @@
* Authors: George Davis <davis_g@mvista.com>
* Deepak Saxena <dsaxena@plexity.net>
*/
+#include <linux/irq.h>
#include <linux/kgdb.h>
#include <asm/traps.h>
@@ -158,6 +159,18 @@ static struct undef_hook kgdb_compiled_brkpt_hook = {
.fn = kgdb_compiled_brk_fn
};
+static void kgdb_call_nmi_hook(void *ignored)
+{
+ kgdb_nmicallback(raw_smp_processor_id(), get_irq_regs());
+}
+
+void kgdb_roundup_cpus(unsigned long flags)
+{
+ local_irq_enable();
+ smp_call_function(kgdb_call_nmi_hook, NULL, 0);
+ local_irq_disable();
+}
+
/**
* kgdb_arch_init - Perform any architecture specific initalization.
*
diff --git a/arch/arm/kernel/kprobes.c b/arch/arm/kernel/kprobes.c
index 60c62c377fa9..2ba7deb3072e 100644
--- a/arch/arm/kernel/kprobes.c
+++ b/arch/arm/kernel/kprobes.c
@@ -22,6 +22,7 @@
#include <linux/kernel.h>
#include <linux/kprobes.h>
#include <linux/module.h>
+#include <linux/slab.h>
#include <linux/stop_machine.h>
#include <linux/stringify.h>
#include <asm/traps.h>
@@ -393,6 +394,14 @@ void __kprobes jprobe_return(void)
/*
* Setup an empty pt_regs. Fill SP and PC fields as
* they're needed by longjmp_break_handler.
+ *
+ * We allocate some slack between the original SP and start of
+ * our fabricated regs. To be precise we want to have worst case
+ * covered which is STMFD with all 16 regs so we allocate 2 *
+ * sizeof(struct_pt_regs)).
+ *
+ * This is to prevent any simulated instruction from writing
+ * over the regs when they are accessing the stack.
*/
"sub sp, %0, %1 \n\t"
"ldr r0, ="__stringify(JPROBE_MAGIC_ADDR)"\n\t"
@@ -410,7 +419,7 @@ void __kprobes jprobe_return(void)
"ldmia sp, {r0 - pc} \n\t"
:
: "r" (kcb->jprobe_saved_regs.ARM_sp),
- "I" (sizeof(struct pt_regs)),
+ "I" (sizeof(struct pt_regs) * 2),
"J" (offsetof(struct pt_regs, ARM_sp)),
"J" (offsetof(struct pt_regs, ARM_pc)),
"J" (offsetof(struct pt_regs, ARM_cpsr))
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index f28c5e9c51ea..c628bdf6c430 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -16,9 +16,9 @@
#include <linux/mm.h>
#include <linux/elf.h>
#include <linux/vmalloc.h>
-#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/string.h>
+#include <linux/gfp.h>
#include <asm/pgtable.h>
#include <asm/sections.h>
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index c54ceb3d1f97..9e70f2053f9a 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -332,7 +332,8 @@ armpmu_reserve_hardware(void)
for (i = 0; i < pmu_irqs->num_irqs; ++i) {
err = request_irq(pmu_irqs->irqs[i], armpmu->handle_irq,
- IRQF_DISABLED, "armpmu", NULL);
+ IRQF_DISABLED | IRQF_NOBALANCING,
+ "armpmu", NULL);
if (err) {
pr_warning("unable to request IRQ%d for ARM "
"perf counters\n", pmu_irqs->irqs[i]);
@@ -965,7 +966,7 @@ armv6pmu_handle_irq(int irq_num,
*/
armv6_pmcr_write(pmcr);
- data.addr = 0;
+ perf_sample_data_init(&data, 0);
cpuc = &__get_cpu_var(cpu_hw_events);
for (idx = 0; idx <= armpmu->num_events; ++idx) {
@@ -1624,7 +1625,7 @@ enum armv7_counters {
/*
* EVTSEL: Event selection reg
*/
-#define ARMV7_EVTSEL_MASK 0x7f /* Mask for writable bits */
+#define ARMV7_EVTSEL_MASK 0xff /* Mask for writable bits */
/*
* SELECT: Counter selection reg
@@ -1945,7 +1946,7 @@ static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
*/
regs = get_irq_regs();
- data.addr = 0;
+ perf_sample_data_init(&data, 0);
cpuc = &__get_cpu_var(cpu_hw_events);
for (idx = 0; idx <= armpmu->num_events; ++idx) {
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index ba2adefa53f7..0e12e0acbf26 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -16,7 +16,6 @@
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
-#include <linux/slab.h>
#include <linux/user.h>
#include <linux/delay.h>
#include <linux/reboot.h>
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index e7714f367eb8..907d5a620bca 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -18,6 +18,7 @@
#include <asm/cacheflush.h>
#include <asm/ucontext.h>
#include <asm/unistd.h>
+#include <asm/vfp.h>
#include "ptrace.h"
#include "signal.h"
@@ -175,6 +176,90 @@ static int restore_iwmmxt_context(struct iwmmxt_sigframe *frame)
#endif
+#ifdef CONFIG_VFP
+
+static int preserve_vfp_context(struct vfp_sigframe __user *frame)
+{
+ struct thread_info *thread = current_thread_info();
+ struct vfp_hard_struct *h = &thread->vfpstate.hard;
+ const unsigned long magic = VFP_MAGIC;
+ const unsigned long size = VFP_STORAGE_SIZE;
+ int err = 0;
+
+ vfp_sync_hwstate(thread);
+ __put_user_error(magic, &frame->magic, err);
+ __put_user_error(size, &frame->size, err);
+
+ /*
+ * Copy the floating point registers. There can be unused
+ * registers see asm/hwcap.h for details.
+ */
+ err |= __copy_to_user(&frame->ufp.fpregs, &h->fpregs,
+ sizeof(h->fpregs));
+ /*
+ * Copy the status and control register.
+ */
+ __put_user_error(h->fpscr, &frame->ufp.fpscr, err);
+
+ /*
+ * Copy the exception registers.
+ */
+ __put_user_error(h->fpexc, &frame->ufp_exc.fpexc, err);
+ __put_user_error(h->fpinst, &frame->ufp_exc.fpinst, err);
+ __put_user_error(h->fpinst2, &frame->ufp_exc.fpinst2, err);
+
+ return err ? -EFAULT : 0;
+}
+
+static int restore_vfp_context(struct vfp_sigframe __user *frame)
+{
+ struct thread_info *thread = current_thread_info();
+ struct vfp_hard_struct *h = &thread->vfpstate.hard;
+ unsigned long magic;
+ unsigned long size;
+ unsigned long fpexc;
+ int err = 0;
+
+ __get_user_error(magic, &frame->magic, err);
+ __get_user_error(size, &frame->size, err);
+
+ if (err)
+ return -EFAULT;
+ if (magic != VFP_MAGIC || size != VFP_STORAGE_SIZE)
+ return -EINVAL;
+
+ /*
+ * Copy the floating point registers. There can be unused
+ * registers see asm/hwcap.h for details.
+ */
+ err |= __copy_from_user(&h->fpregs, &frame->ufp.fpregs,
+ sizeof(h->fpregs));
+ /*
+ * Copy the status and control register.
+ */
+ __get_user_error(h->fpscr, &frame->ufp.fpscr, err);
+
+ /*
+ * Sanitise and restore the exception registers.
+ */
+ __get_user_error(fpexc, &frame->ufp_exc.fpexc, err);
+ /* Ensure the VFP is enabled. */
+ fpexc |= FPEXC_EN;
+ /* Ensure FPINST2 is invalid and the exception flag is cleared. */
+ fpexc &= ~(FPEXC_EX | FPEXC_FP2V);
+ h->fpexc = fpexc;
+
+ __get_user_error(h->fpinst, &frame->ufp_exc.fpinst, err);
+ __get_user_error(h->fpinst2, &frame->ufp_exc.fpinst2, err);
+
+ if (!err)
+ vfp_flush_hwstate(thread);
+
+ return err ? -EFAULT : 0;
+}
+
+#endif
+
/*
* Do a signal return; undo the signal stack. These are aligned to 64-bit.
*/
@@ -233,8 +318,8 @@ static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf)
err |= restore_iwmmxt_context(&aux->iwmmxt);
#endif
#ifdef CONFIG_VFP
-// if (err == 0)
-// err |= vfp_restore_state(&sf->aux.vfp);
+ if (err == 0)
+ err |= restore_vfp_context(&aux->vfp);
#endif
return err;
@@ -348,8 +433,8 @@ setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, sigset_t *set)
err |= preserve_iwmmxt_context(&aux->iwmmxt);
#endif
#ifdef CONFIG_VFP
-// if (err == 0)
-// err |= vfp_save_state(&sf->aux.vfp);
+ if (err == 0)
+ err |= preserve_vfp_context(&aux->vfp);
#endif
__put_user_error(0, &aux->end_magic, err);
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 57162af53dc9..577543f3857f 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -99,6 +99,7 @@ int __cpuinit __cpu_up(unsigned int cpu)
*pmd = __pmd((PHYS_OFFSET & PGDIR_MASK) |
PMD_TYPE_SECT | PMD_SECT_AP_WRITE);
flush_pmd_entry(pmd);
+ outer_clean_range(__pa(pmd), __pa(pmd + 1));
/*
* We need to tell the secondary core where to find
@@ -106,7 +107,8 @@ int __cpuinit __cpu_up(unsigned int cpu)
*/
secondary_data.stack = task_stack_page(idle) + THREAD_START_SP;
secondary_data.pgdir = virt_to_phys(pgd);
- wmb();
+ __cpuc_flush_dcache_area(&secondary_data, sizeof(secondary_data));
+ outer_clean_range(__pa(&secondary_data), __pa(&secondary_data + 1));
/*
* Now bring the CPU into our world.
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index 4350f75e578c..c23501842b98 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -15,7 +15,6 @@
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/sched.h>
-#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/sem.h>
#include <linux/msg.h>
@@ -27,6 +26,7 @@
#include <linux/file.h>
#include <linux/ipc.h>
#include <linux/uaccess.h>
+#include <linux/slab.h>
/* Fork a new task - this creates a new program thread.
* This is called indirectly via a small wrapper
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-08 01:15:45 +0000