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authorThomas Gleixner <tglx@linutronix.de>2018-08-06 20:56:34 +0200
committerThomas Gleixner <tglx@linutronix.de>2018-08-06 20:56:34 +0200
commit315706049c343794ad0d3e5b6f6b60b900457b11 (patch)
tree0a1596a4b5843a6262d17b4c656715854784977d /arch/x86/include
parent706d51681d636a0c4a5ef53395ec3b803e45ed4d (diff)
parentc40a56a7818cfe735fc93a69e1875f8bba834483 (diff)
download96b-common-315706049c343794ad0d3e5b6f6b60b900457b11.tar.gz
Merge branch 'x86/pti-urgent' into x86/pti
Integrate the PTI Global bit fixes which conflict with the 32bit PTI support. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include')
-rw-r--r--arch/x86/include/asm/processor.h1
-rw-r--r--arch/x86/include/asm/qspinlock_paravirt.h2
-rw-r--r--arch/x86/include/asm/set_memory.h1
-rw-r--r--arch/x86/include/asm/uaccess_64.h7
4 files changed, 9 insertions, 2 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index cfd29ee8c3da..59663c08c949 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -966,6 +966,7 @@ static inline uint32_t hypervisor_cpuid_base(const char *sig, uint32_t leaves)
extern unsigned long arch_align_stack(unsigned long sp);
extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
+extern void free_kernel_image_pages(void *begin, void *end);
void default_idle(void);
#ifdef CONFIG_XEN
diff --git a/arch/x86/include/asm/qspinlock_paravirt.h b/arch/x86/include/asm/qspinlock_paravirt.h
index 9ef5ee03d2d7..159622ee0674 100644
--- a/arch/x86/include/asm/qspinlock_paravirt.h
+++ b/arch/x86/include/asm/qspinlock_paravirt.h
@@ -43,7 +43,7 @@ asm (".pushsection .text;"
"push %rdx;"
"mov $0x1,%eax;"
"xor %edx,%edx;"
- "lock cmpxchg %dl,(%rdi);"
+ LOCK_PREFIX "cmpxchg %dl,(%rdi);"
"cmp $0x1,%al;"
"jne .slowpath;"
"pop %rdx;"
diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h
index bd090367236c..34cffcef7375 100644
--- a/arch/x86/include/asm/set_memory.h
+++ b/arch/x86/include/asm/set_memory.h
@@ -46,6 +46,7 @@ int set_memory_np(unsigned long addr, int numpages);
int set_memory_4k(unsigned long addr, int numpages);
int set_memory_encrypted(unsigned long addr, int numpages);
int set_memory_decrypted(unsigned long addr, int numpages);
+int set_memory_np_noalias(unsigned long addr, int numpages);
int set_memory_array_uc(unsigned long *addr, int addrinarray);
int set_memory_array_wc(unsigned long *addr, int addrinarray);
diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index 62acb613114b..a9d637bc301d 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -52,7 +52,12 @@ copy_to_user_mcsafe(void *to, const void *from, unsigned len)
unsigned long ret;
__uaccess_begin();
- ret = memcpy_mcsafe(to, from, len);
+ /*
+ * Note, __memcpy_mcsafe() is explicitly used since it can
+ * handle exceptions / faults. memcpy_mcsafe() may fall back to
+ * memcpy() which lacks this handling.
+ */
+ ret = __memcpy_mcsafe(to, from, len);
__uaccess_end();
return ret;
}