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-rw-r--r--arch/arm/include/asm/hw_breakpoint.h2
-rw-r--r--arch/arm/kernel/hw_breakpoint.c11
-rw-r--r--arch/arm64/include/asm/hw_breakpoint.h2
-rw-r--r--arch/arm64/kernel/hw_breakpoint.c9
-rw-r--r--arch/powerpc/include/asm/hw_breakpoint.h2
-rw-r--r--arch/powerpc/kernel/hw_breakpoint.c6
-rw-r--r--arch/sh/include/asm/hw_breakpoint.h2
-rw-r--r--arch/sh/kernel/hw_breakpoint.c9
-rw-r--r--arch/x86/include/asm/hw_breakpoint.h2
-rw-r--r--arch/x86/kernel/hw_breakpoint.c71
-rw-r--r--arch/xtensa/include/asm/hw_breakpoint.h2
-rw-r--r--arch/xtensa/kernel/hw_breakpoint.c7
-rw-r--r--kernel/events/hw_breakpoint.c2
13 files changed, 63 insertions, 64 deletions
diff --git a/arch/arm/include/asm/hw_breakpoint.h b/arch/arm/include/asm/hw_breakpoint.h
index e46e4e7bdba3..d5a0f52c6755 100644
--- a/arch/arm/include/asm/hw_breakpoint.h
+++ b/arch/arm/include/asm/hw_breakpoint.h
@@ -117,7 +117,7 @@ struct pmu;
extern int arch_bp_generic_fields(struct arch_hw_breakpoint_ctrl ctrl,
int *gen_len, int *gen_type);
-extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
+extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
unsigned long val, void *data);
diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c
index 629e25152c0d..385dcf45d64b 100644
--- a/arch/arm/kernel/hw_breakpoint.c
+++ b/arch/arm/kernel/hw_breakpoint.c
@@ -456,14 +456,13 @@ static int get_hbp_len(u8 hbp_len)
/*
* Check whether bp virtual address is in kernel space.
*/
-int arch_check_bp_in_kernelspace(struct perf_event *bp)
+int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw)
{
unsigned int len;
unsigned long va;
- struct arch_hw_breakpoint *info = counter_arch_bp(bp);
- va = info->address;
- len = get_hbp_len(info->ctrl.len);
+ va = hw->address;
+ len = get_hbp_len(hw->ctrl.len);
return (va >= TASK_SIZE) && ((va + len - 1) >= TASK_SIZE);
}
@@ -576,7 +575,7 @@ static int arch_build_bp_info(struct perf_event *bp)
/* Privilege */
info->ctrl.privilege = ARM_BREAKPOINT_USER;
- if (arch_check_bp_in_kernelspace(bp))
+ if (arch_check_bp_in_kernelspace(info))
info->ctrl.privilege |= ARM_BREAKPOINT_PRIV;
/* Enabled? */
@@ -640,7 +639,7 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp)
return -EINVAL;
/* We don't allow mismatch breakpoints in kernel space. */
- if (arch_check_bp_in_kernelspace(bp))
+ if (arch_check_bp_in_kernelspace(info))
return -EPERM;
/*
diff --git a/arch/arm64/include/asm/hw_breakpoint.h b/arch/arm64/include/asm/hw_breakpoint.h
index 41770766d964..9f4a3d48762e 100644
--- a/arch/arm64/include/asm/hw_breakpoint.h
+++ b/arch/arm64/include/asm/hw_breakpoint.h
@@ -124,7 +124,7 @@ struct pmu;
extern int arch_bp_generic_fields(struct arch_hw_breakpoint_ctrl ctrl,
int *gen_len, int *gen_type, int *offset);
-extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
+extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
unsigned long val, void *data);
diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c
index 413dbe530da8..6a90d12e4ff2 100644
--- a/arch/arm64/kernel/hw_breakpoint.c
+++ b/arch/arm64/kernel/hw_breakpoint.c
@@ -343,14 +343,13 @@ static int get_hbp_len(u8 hbp_len)
/*
* Check whether bp virtual address is in kernel space.
*/
-int arch_check_bp_in_kernelspace(struct perf_event *bp)
+int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw)
{
unsigned int len;
unsigned long va;
- struct arch_hw_breakpoint *info = counter_arch_bp(bp);
- va = info->address;
- len = get_hbp_len(info->ctrl.len);
+ va = hw->address;
+ len = get_hbp_len(hw->ctrl.len);
return (va >= TASK_SIZE) && ((va + len - 1) >= TASK_SIZE);
}
@@ -502,7 +501,7 @@ static int arch_build_bp_info(struct perf_event *bp)
* Note that we disallow combined EL0/EL1 breakpoints because
* that would complicate the stepping code.
*/
- if (arch_check_bp_in_kernelspace(bp))
+ if (arch_check_bp_in_kernelspace(info))
info->ctrl.privilege = AARCH64_BREAKPOINT_EL1;
else
info->ctrl.privilege = AARCH64_BREAKPOINT_EL0;
diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h
index 8e7b09703ca4..4d0b1bfcdfd0 100644
--- a/arch/powerpc/include/asm/hw_breakpoint.h
+++ b/arch/powerpc/include/asm/hw_breakpoint.h
@@ -60,7 +60,7 @@ struct perf_sample_data;
extern int hw_breakpoint_slots(int type);
extern int arch_bp_generic_fields(int type, int *gen_bp_type);
-extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
+extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
unsigned long val, void *data);
diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c
index 80547dad37da..899bcec3f3c8 100644
--- a/arch/powerpc/kernel/hw_breakpoint.c
+++ b/arch/powerpc/kernel/hw_breakpoint.c
@@ -119,11 +119,9 @@ void arch_unregister_hw_breakpoint(struct perf_event *bp)
/*
* Check for virtual address in kernel space.
*/
-int arch_check_bp_in_kernelspace(struct perf_event *bp)
+int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw)
{
- struct arch_hw_breakpoint *info = counter_arch_bp(bp);
-
- return is_kernel_addr(info->address);
+ return is_kernel_addr(hw->address);
}
int arch_bp_generic_fields(int type, int *gen_bp_type)
diff --git a/arch/sh/include/asm/hw_breakpoint.h b/arch/sh/include/asm/hw_breakpoint.h
index 7431c172c0cb..8a88ed0b3cd7 100644
--- a/arch/sh/include/asm/hw_breakpoint.h
+++ b/arch/sh/include/asm/hw_breakpoint.h
@@ -54,7 +54,7 @@ static inline int hw_breakpoint_slots(int type)
}
/* arch/sh/kernel/hw_breakpoint.c */
-extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
+extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
unsigned long val, void *data);
diff --git a/arch/sh/kernel/hw_breakpoint.c b/arch/sh/kernel/hw_breakpoint.c
index 8648ed05ccf0..38791fefdd0c 100644
--- a/arch/sh/kernel/hw_breakpoint.c
+++ b/arch/sh/kernel/hw_breakpoint.c
@@ -124,14 +124,13 @@ static int get_hbp_len(u16 hbp_len)
/*
* Check for virtual address in kernel space.
*/
-int arch_check_bp_in_kernelspace(struct perf_event *bp)
+int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw)
{
unsigned int len;
unsigned long va;
- struct arch_hw_breakpoint *info = counter_arch_bp(bp);
- va = info->address;
- len = get_hbp_len(info->len);
+ va = hw->address;
+ len = get_hbp_len(hw->len);
return (va >= TASK_SIZE) && ((va + len - 1) >= TASK_SIZE);
}
@@ -346,7 +345,7 @@ static int __kprobes hw_breakpoint_handler(struct die_args *args)
perf_bp_event(bp, args->regs);
/* Deliver the signal to userspace */
- if (!arch_check_bp_in_kernelspace(bp)) {
+ if (!arch_check_bp_in_kernelspace(&bp->hw.info)) {
force_sig_fault(SIGTRAP, TRAP_HWBKPT,
(void __user *)NULL, current);
}
diff --git a/arch/x86/include/asm/hw_breakpoint.h b/arch/x86/include/asm/hw_breakpoint.h
index f59c39835a5a..78924596f51f 100644
--- a/arch/x86/include/asm/hw_breakpoint.h
+++ b/arch/x86/include/asm/hw_breakpoint.h
@@ -52,7 +52,7 @@ static inline int hw_breakpoint_slots(int type)
struct perf_event;
struct pmu;
-extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
+extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
unsigned long val, void *data);
diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c
index 8771766d46b6..c43379188f4f 100644
--- a/arch/x86/kernel/hw_breakpoint.c
+++ b/arch/x86/kernel/hw_breakpoint.c
@@ -169,28 +169,29 @@ void arch_uninstall_hw_breakpoint(struct perf_event *bp)
set_dr_addr_mask(0, i);
}
-/*
- * Check for virtual address in kernel space.
- */
-int arch_check_bp_in_kernelspace(struct perf_event *bp)
+static int arch_bp_generic_len(int x86_len)
{
- unsigned int len;
- unsigned long va;
- struct arch_hw_breakpoint *info = counter_arch_bp(bp);
-
- va = info->address;
- len = bp->attr.bp_len;
-
- /*
- * We don't need to worry about va + len - 1 overflowing:
- * we already require that va is aligned to a multiple of len.
- */
- return (va >= TASK_SIZE_MAX) || ((va + len - 1) >= TASK_SIZE_MAX);
+ switch (x86_len) {
+ case X86_BREAKPOINT_LEN_1:
+ return HW_BREAKPOINT_LEN_1;
+ case X86_BREAKPOINT_LEN_2:
+ return HW_BREAKPOINT_LEN_2;
+ case X86_BREAKPOINT_LEN_4:
+ return HW_BREAKPOINT_LEN_4;
+#ifdef CONFIG_X86_64
+ case X86_BREAKPOINT_LEN_8:
+ return HW_BREAKPOINT_LEN_8;
+#endif
+ default:
+ return -EINVAL;
+ }
}
int arch_bp_generic_fields(int x86_len, int x86_type,
int *gen_len, int *gen_type)
{
+ int len;
+
/* Type */
switch (x86_type) {
case X86_BREAKPOINT_EXECUTE:
@@ -211,28 +212,32 @@ int arch_bp_generic_fields(int x86_len, int x86_type,
}
/* Len */
- switch (x86_len) {
- case X86_BREAKPOINT_LEN_1:
- *gen_len = HW_BREAKPOINT_LEN_1;
- break;
- case X86_BREAKPOINT_LEN_2:
- *gen_len = HW_BREAKPOINT_LEN_2;
- break;
- case X86_BREAKPOINT_LEN_4:
- *gen_len = HW_BREAKPOINT_LEN_4;
- break;
-#ifdef CONFIG_X86_64
- case X86_BREAKPOINT_LEN_8:
- *gen_len = HW_BREAKPOINT_LEN_8;
- break;
-#endif
- default:
+ len = arch_bp_generic_len(x86_len);
+ if (len < 0)
return -EINVAL;
- }
+ *gen_len = len;
return 0;
}
+/*
+ * Check for virtual address in kernel space.
+ */
+int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw)
+{
+ unsigned long va;
+ int len;
+
+ va = hw->address;
+ len = arch_bp_generic_len(hw->len);
+ WARN_ON_ONCE(len < 0);
+
+ /*
+ * We don't need to worry about va + len - 1 overflowing:
+ * we already require that va is aligned to a multiple of len.
+ */
+ return (va >= TASK_SIZE_MAX) || ((va + len - 1) >= TASK_SIZE_MAX);
+}
static int arch_build_bp_info(struct perf_event *bp)
{
diff --git a/arch/xtensa/include/asm/hw_breakpoint.h b/arch/xtensa/include/asm/hw_breakpoint.h
index dbe3053b284a..2525bf6816a6 100644
--- a/arch/xtensa/include/asm/hw_breakpoint.h
+++ b/arch/xtensa/include/asm/hw_breakpoint.h
@@ -35,7 +35,7 @@ struct pt_regs;
struct task_struct;
int hw_breakpoint_slots(int type);
-int arch_check_bp_in_kernelspace(struct perf_event *bp);
+int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
int arch_validate_hwbkpt_settings(struct perf_event *bp);
int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
unsigned long val, void *data);
diff --git a/arch/xtensa/kernel/hw_breakpoint.c b/arch/xtensa/kernel/hw_breakpoint.c
index b35656ab7dbd..6e34c3848885 100644
--- a/arch/xtensa/kernel/hw_breakpoint.c
+++ b/arch/xtensa/kernel/hw_breakpoint.c
@@ -33,14 +33,13 @@ int hw_breakpoint_slots(int type)
}
}
-int arch_check_bp_in_kernelspace(struct perf_event *bp)
+int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw)
{
unsigned int len;
unsigned long va;
- struct arch_hw_breakpoint *info = counter_arch_bp(bp);
- va = info->address;
- len = bp->attr.bp_len;
+ va = hw->address;
+ len = hw->len;
return (va >= TASK_SIZE) && ((va + len - 1) >= TASK_SIZE);
}
diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c
index 314e2a9040c7..89fe94c9214c 100644
--- a/kernel/events/hw_breakpoint.c
+++ b/kernel/events/hw_breakpoint.c
@@ -427,7 +427,7 @@ static int hw_breakpoint_parse(struct perf_event *bp,
if (err)
return err;
- if (arch_check_bp_in_kernelspace(bp)) {
+ if (arch_check_bp_in_kernelspace(hw)) {
if (attr->exclude_kernel)
return -EINVAL;
/*