summaryrefslogtreecommitdiffstats
path: root/arch/mips/include
diff options
context:
space:
mode:
authorIngo Molnar <mingo@kernel.org>2017-05-05 08:20:52 +0200
committerIngo Molnar <mingo@kernel.org>2017-05-05 08:21:03 +0200
commit415812f2d6b856d33ede9bf4a2b95575dbbb3d4e (patch)
tree4daf9ca52f89ea59453538b406f584d47c77aff3 /arch/mips/include
parentx86/asm: Don't use RBP as a temporary register in csum_partial_copy_generic() (diff)
parentMerge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/... (diff)
downloadlinux-415812f2d6b856d33ede9bf4a2b95575dbbb3d4e.tar.xz
linux-415812f2d6b856d33ede9bf4a2b95575dbbb3d4e.zip
Merge branch 'linus' into x86/urgent, to pick up dependent commits
We are going to fix a bug introduced by a more recent commit, so refresh the tree. Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/mips/include')
-rw-r--r--arch/mips/include/asm/checksum.h4
-rw-r--r--arch/mips/include/asm/r4kcache.h4
-rw-r--r--arch/mips/include/asm/uaccess.h449
3 files changed, 64 insertions, 393 deletions
diff --git a/arch/mips/include/asm/checksum.h b/arch/mips/include/asm/checksum.h
index c8b574f7e0cc..77cad232a1c6 100644
--- a/arch/mips/include/asm/checksum.h
+++ b/arch/mips/include/asm/checksum.h
@@ -50,7 +50,7 @@ __wsum csum_partial_copy_from_user(const void __user *src, void *dst, int len,
__wsum sum, int *err_ptr)
{
might_fault();
- if (segment_eq(get_fs(), get_ds()))
+ if (uaccess_kernel())
return __csum_partial_copy_kernel((__force void *)src, dst,
len, sum, err_ptr);
else
@@ -82,7 +82,7 @@ __wsum csum_and_copy_to_user(const void *src, void __user *dst, int len,
{
might_fault();
if (access_ok(VERIFY_WRITE, dst, len)) {
- if (segment_eq(get_fs(), get_ds()))
+ if (uaccess_kernel())
return __csum_partial_copy_kernel(src,
(__force void *)dst,
len, sum, err_ptr);
diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h
index 55fd94e6cd0b..7f12d7e27c94 100644
--- a/arch/mips/include/asm/r4kcache.h
+++ b/arch/mips/include/asm/r4kcache.h
@@ -20,7 +20,7 @@
#include <asm/cpu-features.h>
#include <asm/cpu-type.h>
#include <asm/mipsmtregs.h>
-#include <linux/uaccess.h> /* for segment_eq() */
+#include <linux/uaccess.h> /* for uaccess_kernel() */
extern void (*r4k_blast_dcache)(void);
extern void (*r4k_blast_icache)(void);
@@ -714,7 +714,7 @@ static inline void protected_blast_##pfx##cache##_range(unsigned long start,\
\
__##pfx##flush_prologue \
\
- if (segment_eq(get_fs(), USER_DS)) { \
+ if (!uaccess_kernel()) { \
while (1) { \
protected_cachee_op(hitop, addr); \
if (addr == aend) \
diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h
index 5347cfe15af2..99e629a590a5 100644
--- a/arch/mips/include/asm/uaccess.h
+++ b/arch/mips/include/asm/uaccess.h
@@ -12,8 +12,6 @@
#define _ASM_UACCESS_H
#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/thread_info.h>
#include <linux/string.h>
#include <asm/asm-eva.h>
#include <asm/extable.h>
@@ -71,9 +69,6 @@ extern u64 __ua_limit;
#define USER_DS ((mm_segment_t) { __UA_LIMIT })
#endif
-#define VERIFY_READ 0
-#define VERIFY_WRITE 1
-
#define get_ds() (KERNEL_DS)
#define get_fs() (current_thread_info()->addr_limit)
#define set_fs(x) (current_thread_info()->addr_limit = (x))
@@ -93,7 +88,7 @@ static inline bool eva_kernel_access(void)
if (!IS_ENABLED(CONFIG_EVA))
return false;
- return segment_eq(get_fs(), get_ds());
+ return uaccess_kernel();
}
/*
@@ -133,23 +128,14 @@ static inline bool eva_kernel_access(void)
* this function, memory access functions may still return -EFAULT.
*/
-#define __access_mask get_fs().seg
-
-#define __access_ok(addr, size, mask) \
-({ \
- unsigned long __addr = (unsigned long) (addr); \
- unsigned long __size = size; \
- unsigned long __mask = mask; \
- unsigned long __ok; \
- \
- __chk_user_ptr(addr); \
- __ok = (signed long)(__mask & (__addr | (__addr + __size) | \
- __ua_size(__size))); \
- __ok == 0; \
-})
+static inline int __access_ok(const void __user *p, unsigned long size)
+{
+ unsigned long addr = (unsigned long)p;
+ return (get_fs().seg & (addr | (addr + size) | __ua_size(size))) == 0;
+}
#define access_ok(type, addr, size) \
- likely(__access_ok((addr), (size), __access_mask))
+ likely(__access_ok((addr), (size)))
/*
* put_user: - Write a simple value into user space.
@@ -811,157 +797,7 @@ extern void __put_user_unaligned_unknown(void);
extern size_t __copy_user(void *__to, const void *__from, size_t __n);
-#ifndef CONFIG_EVA
-#define __invoke_copy_to_user(to, from, n) \
-({ \
- register void __user *__cu_to_r __asm__("$4"); \
- register const void *__cu_from_r __asm__("$5"); \
- register long __cu_len_r __asm__("$6"); \
- \
- __cu_to_r = (to); \
- __cu_from_r = (from); \
- __cu_len_r = (n); \
- __asm__ __volatile__( \
- __MODULE_JAL(__copy_user) \
- : "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
- : \
- : "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
- DADDI_SCRATCH, "memory"); \
- __cu_len_r; \
-})
-
-#define __invoke_copy_to_kernel(to, from, n) \
- __invoke_copy_to_user(to, from, n)
-
-#endif
-
-/*
- * __copy_to_user: - Copy a block of data into user space, with less checking.
- * @to: Destination address, in user space.
- * @from: Source address, in kernel space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from kernel space to user space. Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- */
-#define __copy_to_user(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_from, __cu_len, true); \
- might_fault(); \
- \
- if (eva_kernel_access()) \
- __cu_len = __invoke_copy_to_kernel(__cu_to, __cu_from, \
- __cu_len); \
- else \
- __cu_len = __invoke_copy_to_user(__cu_to, __cu_from, \
- __cu_len); \
- __cu_len; \
-})
-
-extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
-
-#define __copy_to_user_inatomic(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_from, __cu_len, true); \
- \
- if (eva_kernel_access()) \
- __cu_len = __invoke_copy_to_kernel(__cu_to, __cu_from, \
- __cu_len); \
- else \
- __cu_len = __invoke_copy_to_user(__cu_to, __cu_from, \
- __cu_len); \
- __cu_len; \
-})
-
-#define __copy_from_user_inatomic(to, from, n) \
-({ \
- void *__cu_to; \
- const void __user *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_to, __cu_len, false); \
- \
- if (eva_kernel_access()) \
- __cu_len = __invoke_copy_from_kernel_inatomic(__cu_to, \
- __cu_from,\
- __cu_len);\
- else \
- __cu_len = __invoke_copy_from_user_inatomic(__cu_to, \
- __cu_from, \
- __cu_len); \
- __cu_len; \
-})
-
-/*
- * copy_to_user: - Copy a block of data into user space.
- * @to: Destination address, in user space.
- * @from: Source address, in kernel space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from kernel space to user space.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- */
-#define copy_to_user(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_from, __cu_len, true); \
- \
- if (eva_kernel_access()) { \
- __cu_len = __invoke_copy_to_kernel(__cu_to, \
- __cu_from, \
- __cu_len); \
- } else { \
- if (access_ok(VERIFY_WRITE, __cu_to, __cu_len)) { \
- might_fault(); \
- __cu_len = __invoke_copy_to_user(__cu_to, \
- __cu_from, \
- __cu_len); \
- } \
- } \
- __cu_len; \
-})
-
-#ifndef CONFIG_EVA
-
-#define __invoke_copy_from_user(to, from, n) \
+#define __invoke_copy_from(func, to, from, n) \
({ \
register void *__cu_to_r __asm__("$4"); \
register const void __user *__cu_from_r __asm__("$5"); \
@@ -972,7 +808,7 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
__cu_len_r = (n); \
__asm__ __volatile__( \
".set\tnoreorder\n\t" \
- __MODULE_JAL(__copy_user) \
+ __MODULE_JAL(func) \
".set\tnoat\n\t" \
__UA_ADDU "\t$1, %1, %2\n\t" \
".set\tat\n\t" \
@@ -984,33 +820,17 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
__cu_len_r; \
})
-#define __invoke_copy_from_kernel(to, from, n) \
- __invoke_copy_from_user(to, from, n)
-
-/* For userland <-> userland operations */
-#define ___invoke_copy_in_user(to, from, n) \
- __invoke_copy_from_user(to, from, n)
-
-/* For kernel <-> kernel operations */
-#define ___invoke_copy_in_kernel(to, from, n) \
- __invoke_copy_from_user(to, from, n)
-
-#define __invoke_copy_from_user_inatomic(to, from, n) \
+#define __invoke_copy_to(func, to, from, n) \
({ \
- register void *__cu_to_r __asm__("$4"); \
- register const void __user *__cu_from_r __asm__("$5"); \
+ register void __user *__cu_to_r __asm__("$4"); \
+ register const void *__cu_from_r __asm__("$5"); \
register long __cu_len_r __asm__("$6"); \
\
__cu_to_r = (to); \
__cu_from_r = (from); \
__cu_len_r = (n); \
__asm__ __volatile__( \
- ".set\tnoreorder\n\t" \
- __MODULE_JAL(__copy_user_inatomic) \
- ".set\tnoat\n\t" \
- __UA_ADDU "\t$1, %1, %2\n\t" \
- ".set\tat\n\t" \
- ".set\treorder" \
+ __MODULE_JAL(func) \
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
: \
: "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
@@ -1018,228 +838,79 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
__cu_len_r; \
})
-#define __invoke_copy_from_kernel_inatomic(to, from, n) \
- __invoke_copy_from_user_inatomic(to, from, n) \
+#define __invoke_copy_from_kernel(to, from, n) \
+ __invoke_copy_from(__copy_user, to, from, n)
+
+#define __invoke_copy_to_kernel(to, from, n) \
+ __invoke_copy_to(__copy_user, to, from, n)
+
+#define ___invoke_copy_in_kernel(to, from, n) \
+ __invoke_copy_from(__copy_user, to, from, n)
+
+#ifndef CONFIG_EVA
+#define __invoke_copy_from_user(to, from, n) \
+ __invoke_copy_from(__copy_user, to, from, n)
+
+#define __invoke_copy_to_user(to, from, n) \
+ __invoke_copy_to(__copy_user, to, from, n)
+
+#define ___invoke_copy_in_user(to, from, n) \
+ __invoke_copy_from(__copy_user, to, from, n)
#else
/* EVA specific functions */
-extern size_t __copy_user_inatomic_eva(void *__to, const void *__from,
- size_t __n);
extern size_t __copy_from_user_eva(void *__to, const void *__from,
size_t __n);
extern size_t __copy_to_user_eva(void *__to, const void *__from,
size_t __n);
extern size_t __copy_in_user_eva(void *__to, const void *__from, size_t __n);
-#define __invoke_copy_from_user_eva_generic(to, from, n, func_ptr) \
-({ \
- register void *__cu_to_r __asm__("$4"); \
- register const void __user *__cu_from_r __asm__("$5"); \
- register long __cu_len_r __asm__("$6"); \
- \
- __cu_to_r = (to); \
- __cu_from_r = (from); \
- __cu_len_r = (n); \
- __asm__ __volatile__( \
- ".set\tnoreorder\n\t" \
- __MODULE_JAL(func_ptr) \
- ".set\tnoat\n\t" \
- __UA_ADDU "\t$1, %1, %2\n\t" \
- ".set\tat\n\t" \
- ".set\treorder" \
- : "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
- : \
- : "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
- DADDI_SCRATCH, "memory"); \
- __cu_len_r; \
-})
-
-#define __invoke_copy_to_user_eva_generic(to, from, n, func_ptr) \
-({ \
- register void *__cu_to_r __asm__("$4"); \
- register const void __user *__cu_from_r __asm__("$5"); \
- register long __cu_len_r __asm__("$6"); \
- \
- __cu_to_r = (to); \
- __cu_from_r = (from); \
- __cu_len_r = (n); \
- __asm__ __volatile__( \
- __MODULE_JAL(func_ptr) \
- : "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
- : \
- : "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
- DADDI_SCRATCH, "memory"); \
- __cu_len_r; \
-})
-
/*
* Source or destination address is in userland. We need to go through
* the TLB
*/
#define __invoke_copy_from_user(to, from, n) \
- __invoke_copy_from_user_eva_generic(to, from, n, __copy_from_user_eva)
-
-#define __invoke_copy_from_user_inatomic(to, from, n) \
- __invoke_copy_from_user_eva_generic(to, from, n, \
- __copy_user_inatomic_eva)
+ __invoke_copy_from(__copy_from_user_eva, to, from, n)
#define __invoke_copy_to_user(to, from, n) \
- __invoke_copy_to_user_eva_generic(to, from, n, __copy_to_user_eva)
+ __invoke_copy_to(__copy_to_user_eva, to, from, n)
#define ___invoke_copy_in_user(to, from, n) \
- __invoke_copy_from_user_eva_generic(to, from, n, __copy_in_user_eva)
-
-/*
- * Source or destination address in the kernel. We are not going through
- * the TLB
- */
-#define __invoke_copy_from_kernel(to, from, n) \
- __invoke_copy_from_user_eva_generic(to, from, n, __copy_user)
-
-#define __invoke_copy_from_kernel_inatomic(to, from, n) \
- __invoke_copy_from_user_eva_generic(to, from, n, __copy_user_inatomic)
-
-#define __invoke_copy_to_kernel(to, from, n) \
- __invoke_copy_to_user_eva_generic(to, from, n, __copy_user)
-
-#define ___invoke_copy_in_kernel(to, from, n) \
- __invoke_copy_from_user_eva_generic(to, from, n, __copy_user)
+ __invoke_copy_from(__copy_in_user_eva, to, from, n)
#endif /* CONFIG_EVA */
-/*
- * __copy_from_user: - Copy a block of data from user space, with less checking.
- * @to: Destination address, in kernel space.
- * @from: Source address, in user space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from user space to kernel space. Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- *
- * If some data could not be copied, this function will pad the copied
- * data to the requested size using zero bytes.
- */
-#define __copy_from_user(to, from, n) \
-({ \
- void *__cu_to; \
- const void __user *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_to, __cu_len, false); \
- \
- if (eva_kernel_access()) { \
- __cu_len = __invoke_copy_from_kernel(__cu_to, \
- __cu_from, \
- __cu_len); \
- } else { \
- might_fault(); \
- __cu_len = __invoke_copy_from_user(__cu_to, __cu_from, \
- __cu_len); \
- } \
- __cu_len; \
-})
+static inline unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+ if (eva_kernel_access())
+ return __invoke_copy_to_kernel(to, from, n);
+ else
+ return __invoke_copy_to_user(to, from, n);
+}
-/*
- * copy_from_user: - Copy a block of data from user space.
- * @to: Destination address, in kernel space.
- * @from: Source address, in user space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from user space to kernel space.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- *
- * If some data could not be copied, this function will pad the copied
- * data to the requested size using zero bytes.
- */
-#define copy_from_user(to, from, n) \
-({ \
- void *__cu_to; \
- const void __user *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_to, __cu_len, false); \
- \
- if (eva_kernel_access()) { \
- __cu_len = __invoke_copy_from_kernel(__cu_to, \
- __cu_from, \
- __cu_len); \
- } else { \
- if (access_ok(VERIFY_READ, __cu_from, __cu_len)) { \
- might_fault(); \
- __cu_len = __invoke_copy_from_user(__cu_to, \
- __cu_from, \
- __cu_len); \
- } else { \
- memset(__cu_to, 0, __cu_len); \
- } \
- } \
- __cu_len; \
-})
+static inline unsigned long
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+ if (eva_kernel_access())
+ return __invoke_copy_from_kernel(to, from, n);
+ else
+ return __invoke_copy_from_user(to, from, n);
+}
-#define __copy_in_user(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void __user *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- if (eva_kernel_access()) { \
- __cu_len = ___invoke_copy_in_kernel(__cu_to, __cu_from, \
- __cu_len); \
- } else { \
- might_fault(); \
- __cu_len = ___invoke_copy_in_user(__cu_to, __cu_from, \
- __cu_len); \
- } \
- __cu_len; \
-})
+#define INLINE_COPY_FROM_USER
+#define INLINE_COPY_TO_USER
-#define copy_in_user(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void __user *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- if (eva_kernel_access()) { \
- __cu_len = ___invoke_copy_in_kernel(__cu_to,__cu_from, \
- __cu_len); \
- } else { \
- if (likely(access_ok(VERIFY_READ, __cu_from, __cu_len) &&\
- access_ok(VERIFY_WRITE, __cu_to, __cu_len))) {\
- might_fault(); \
- __cu_len = ___invoke_copy_in_user(__cu_to, \
- __cu_from, \
- __cu_len); \
- } \
- } \
- __cu_len; \
-})
+static inline unsigned long
+raw_copy_in_user(void __user*to, const void __user *from, unsigned long n)
+{
+ if (eva_kernel_access())
+ return ___invoke_copy_in_kernel(to, from, n);
+ else
+ return ___invoke_copy_in_user(to, from, n);
+}
extern __kernel_size_t __bzero_kernel(void __user *addr, __kernel_size_t size);
extern __kernel_size_t __bzero(void __user *addr, __kernel_size_t size);