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authorThomas Gleixner <tglx@linutronix.de>2020-04-21 11:20:36 +0200
committerBorislav Petkov <bp@suse.de>2020-04-26 11:10:25 +0200
commit29def599b38bb8a10f48f83821dd990615300b04 (patch)
tree6135cb7b51ad2a42d09e9cf6d993bab864032b31 /arch/x86/include/asm/paravirt.h
parent58430c5dba7bfe1d132b3c07f0d7a596852ef55c (diff)
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/paravirt.h')
-rw-r--r--arch/x86/include/asm/paravirt.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index dcd6517a694a..5ca5d297df75 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -50,6 +50,8 @@ static inline void slow_down_io(void)
void native_flush_tlb_local(void);
void native_flush_tlb_global(void);
void native_flush_tlb_one_user(unsigned long addr);
+void native_flush_tlb_others(const struct cpumask *cpumask,
+ const struct flush_tlb_info *info);
static inline void __flush_tlb_local(void)
{
@@ -66,8 +68,8 @@ static inline void __flush_tlb_one_user(unsigned long addr)
PVOP_VCALL1(mmu.flush_tlb_one_user, addr);
}
-static inline void flush_tlb_others(const struct cpumask *cpumask,
- const struct flush_tlb_info *info)
+static inline void __flush_tlb_others(const struct cpumask *cpumask,
+ const struct flush_tlb_info *info)
{
PVOP_VCALL2(mmu.flush_tlb_others, cpumask, info);
}