diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-04-21 12:20:36 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-04-26 12:10:25 +0300 |
| commit | 29def599b38bb8a10f48f83821dd990615300b04 (patch) | |
| tree | 6135cb7b51ad2a42d09e9cf6d993bab864032b31 /arch/x86/include/asm/tlbflush.h | |
| parent | 58430c5dba7bfe1d132b3c07f0d7a596852ef55c (diff) | |
| download | linux-29def599b38bb8a10f48f83821dd990615300b04.tar.xz | |
x86/tlb: Move flush_tlb_others() out of line
cpu_tlbstate is exported because various TLB-related functions need
access to it, but cpu_tlbstate is sensitive information which should
only be accessed by well-contained kernel functions and not be directly
exposed to modules.
As a last step, move __flush_tlb_others() out of line and hide the
native function. The latter can be static when CONFIG_PARAVIRT is
disabled.
No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200421092559.641957686@linutronix.de
Diffstat (limited to 'arch/x86/include/asm/tlbflush.h')
| -rw-r--r-- | arch/x86/include/asm/tlbflush.h | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h index bbb94f05e1f3..d064ae8a0f2a 100644 --- a/arch/x86/include/asm/tlbflush.h +++ b/arch/x86/include/asm/tlbflush.h @@ -140,10 +140,14 @@ static inline unsigned long build_cr3_noflush(pgd_t *pgd, u16 asid) return __sme_pa(pgd) | kern_pcid(asid) | CR3_NOFLUSH; } +struct flush_tlb_info; + void flush_tlb_local(void); void flush_tlb_global(void); void flush_tlb_one_user(unsigned long addr); void flush_tlb_one_kernel(unsigned long addr); +void flush_tlb_others(const struct cpumask *cpumask, + const struct flush_tlb_info *info); #ifdef CONFIG_PARAVIRT #include <asm/paravirt.h> @@ -418,9 +422,6 @@ static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long a) flush_tlb_mm_range(vma->vm_mm, a, a + PAGE_SIZE, PAGE_SHIFT, false); } -void native_flush_tlb_others(const struct cpumask *cpumask, - const struct flush_tlb_info *info); - static inline u64 inc_mm_tlb_gen(struct mm_struct *mm) { /* @@ -442,9 +443,6 @@ static inline void arch_tlbbatch_add_mm(struct arch_tlbflush_unmap_batch *batch, extern void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch); #ifndef CONFIG_PARAVIRT -#define flush_tlb_others(mask, info) \ - native_flush_tlb_others(mask, info) - #define paravirt_tlb_remove_table(tlb, page) \ tlb_remove_page(tlb, (void *)(page)) #endif |