aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/include
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/include')
-rw-r--r--arch/x86/include/asm/dma-mapping.h7
-rw-r--r--arch/x86/include/asm/kmemcheck.h42
-rw-r--r--arch/x86/include/asm/pgtable.h5
-rw-r--r--arch/x86/include/asm/pgtable_types.h9
-rw-r--r--arch/x86/include/asm/string_32.h8
-rw-r--r--arch/x86/include/asm/string_64.h8
-rw-r--r--arch/x86/include/asm/thread_info.h4
-rw-r--r--arch/x86/include/asm/xor.h5
8 files changed, 84 insertions, 4 deletions
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index f82fdc412c6..b93405b228b 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -6,6 +6,7 @@
* Documentation/DMA-API.txt for documentation.
*/
+#include <linux/kmemcheck.h>
#include <linux/scatterlist.h>
#include <linux/dma-debug.h>
#include <linux/dma-attrs.h>
@@ -60,6 +61,7 @@ dma_map_single(struct device *hwdev, void *ptr, size_t size,
dma_addr_t addr;
BUG_ON(!valid_dma_direction(dir));
+ kmemcheck_mark_initialized(ptr, size);
addr = ops->map_page(hwdev, virt_to_page(ptr),
(unsigned long)ptr & ~PAGE_MASK, size,
dir, NULL);
@@ -87,8 +89,12 @@ dma_map_sg(struct device *hwdev, struct scatterlist *sg,
{
struct dma_map_ops *ops = get_dma_ops(hwdev);
int ents;
+ struct scatterlist *s;
+ int i;
BUG_ON(!valid_dma_direction(dir));
+ for_each_sg(sg, s, nents, i)
+ kmemcheck_mark_initialized(sg_virt(s), s->length);
ents = ops->map_sg(hwdev, sg, nents, dir, NULL);
debug_dma_map_sg(hwdev, sg, nents, ents, dir);
@@ -200,6 +206,7 @@ static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
dma_addr_t addr;
BUG_ON(!valid_dma_direction(dir));
+ kmemcheck_mark_initialized(page_address(page) + offset, size);
addr = ops->map_page(dev, page, offset, size, dir, NULL);
debug_dma_map_page(dev, page, offset, size, dir, addr, false);
diff --git a/arch/x86/include/asm/kmemcheck.h b/arch/x86/include/asm/kmemcheck.h
new file mode 100644
index 00000000000..ed01518f297
--- /dev/null
+++ b/arch/x86/include/asm/kmemcheck.h
@@ -0,0 +1,42 @@
+#ifndef ASM_X86_KMEMCHECK_H
+#define ASM_X86_KMEMCHECK_H
+
+#include <linux/types.h>
+#include <asm/ptrace.h>
+
+#ifdef CONFIG_KMEMCHECK
+bool kmemcheck_active(struct pt_regs *regs);
+
+void kmemcheck_show(struct pt_regs *regs);
+void kmemcheck_hide(struct pt_regs *regs);
+
+bool kmemcheck_fault(struct pt_regs *regs,
+ unsigned long address, unsigned long error_code);
+bool kmemcheck_trap(struct pt_regs *regs);
+#else
+static inline bool kmemcheck_active(struct pt_regs *regs)
+{
+ return false;
+}
+
+static inline void kmemcheck_show(struct pt_regs *regs)
+{
+}
+
+static inline void kmemcheck_hide(struct pt_regs *regs)
+{
+}
+
+static inline bool kmemcheck_fault(struct pt_regs *regs,
+ unsigned long address, unsigned long error_code)
+{
+ return false;
+}
+
+static inline bool kmemcheck_trap(struct pt_regs *regs)
+{
+ return false;
+}
+#endif /* CONFIG_KMEMCHECK */
+
+#endif
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 18ef7ebf263..3cc06e3fceb 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -317,6 +317,11 @@ static inline int pte_present(pte_t a)
return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE);
}
+static inline int pte_hidden(pte_t pte)
+{
+ return pte_flags(pte) & _PAGE_HIDDEN;
+}
+
static inline int pmd_present(pmd_t pmd)
{
return pmd_flags(pmd) & _PAGE_PRESENT;
diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h
index 4d258ad76a0..54cb697f490 100644
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -18,7 +18,7 @@
#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
#define _PAGE_BIT_UNUSED1 9 /* available for programmer */
#define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */
-#define _PAGE_BIT_UNUSED3 11
+#define _PAGE_BIT_HIDDEN 11 /* hidden by kmemcheck */
#define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
#define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1
#define _PAGE_BIT_CPA_TEST _PAGE_BIT_UNUSED1
@@ -41,13 +41,18 @@
#define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
#define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
#define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
-#define _PAGE_UNUSED3 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3)
#define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
#define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
#define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
#define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
#define __HAVE_ARCH_PTE_SPECIAL
+#ifdef CONFIG_KMEMCHECK
+#define _PAGE_HIDDEN (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN)
+#else
+#define _PAGE_HIDDEN (_AT(pteval_t, 0))
+#endif
+
#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
#define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
#else
diff --git a/arch/x86/include/asm/string_32.h b/arch/x86/include/asm/string_32.h
index 0e0e3ba827f..c86f452256d 100644
--- a/arch/x86/include/asm/string_32.h
+++ b/arch/x86/include/asm/string_32.h
@@ -177,10 +177,18 @@ static inline void *__memcpy3d(void *to, const void *from, size_t len)
* No 3D Now!
*/
+#ifndef CONFIG_KMEMCHECK
#define memcpy(t, f, n) \
(__builtin_constant_p((n)) \
? __constant_memcpy((t), (f), (n)) \
: __memcpy((t), (f), (n)))
+#else
+/*
+ * kmemcheck becomes very happy if we use the REP instructions unconditionally,
+ * because it means that we know both memory operands in advance.
+ */
+#define memcpy(t, f, n) __memcpy((t), (f), (n))
+#endif
#endif
diff --git a/arch/x86/include/asm/string_64.h b/arch/x86/include/asm/string_64.h
index 2afe164bf1e..19e2c468fc2 100644
--- a/arch/x86/include/asm/string_64.h
+++ b/arch/x86/include/asm/string_64.h
@@ -27,6 +27,7 @@ static __always_inline void *__inline_memcpy(void *to, const void *from, size_t
function. */
#define __HAVE_ARCH_MEMCPY 1
+#ifndef CONFIG_KMEMCHECK
#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4
extern void *memcpy(void *to, const void *from, size_t len);
#else
@@ -42,6 +43,13 @@ extern void *__memcpy(void *to, const void *from, size_t len);
__ret; \
})
#endif
+#else
+/*
+ * kmemcheck becomes very happy if we use the REP instructions unconditionally,
+ * because it means that we know both memory operands in advance.
+ */
+#define memcpy(dst, src, len) __inline_memcpy((dst), (src), (len))
+#endif
#define __HAVE_ARCH_MEMSET
void *memset(void *s, int c, size_t n);
diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h
index 602c769fc98..b0783520988 100644
--- a/arch/x86/include/asm/thread_info.h
+++ b/arch/x86/include/asm/thread_info.h
@@ -154,9 +154,9 @@ struct thread_info {
/* thread information allocation */
#ifdef CONFIG_DEBUG_STACK_USAGE
-#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
+#define THREAD_FLAGS (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO)
#else
-#define THREAD_FLAGS GFP_KERNEL
+#define THREAD_FLAGS (GFP_KERNEL | __GFP_NOTRACK)
#endif
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
diff --git a/arch/x86/include/asm/xor.h b/arch/x86/include/asm/xor.h
index 11b3bb86e17..7fcf6f3dbcc 100644
--- a/arch/x86/include/asm/xor.h
+++ b/arch/x86/include/asm/xor.h
@@ -1,5 +1,10 @@
+#ifdef CONFIG_KMEMCHECK
+/* kmemcheck doesn't handle MMX/SSE/SSE2 instructions */
+# include <asm-generic/xor.h>
+#else
#ifdef CONFIG_X86_32
# include "xor_32.h"
#else
# include "xor_64.h"
#endif
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-16 14:37:32 +0000