diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-04-21 11:20:36 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-04-26 11:10:25 +0200 |
| commit | 29def599b38bb8a10f48f83821dd990615300b04 (patch) | |
| tree | 6135cb7b51ad2a42d09e9cf6d993bab864032b31 /arch/x86/mm/tlb.c | |
| parent | 58430c5dba7bfe1d132b3c07f0d7a596852ef55c (diff) | |
| download | linux-29def599b38bb8a10f48f83821dd990615300b04.tar.bz2 | |
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/mm/tlb.c')
| -rw-r--r-- | arch/x86/mm/tlb.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index ad217ed2a74f..209799dabc70 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -25,6 +25,7 @@ # define __flush_tlb_local native_flush_tlb_local # define __flush_tlb_global native_flush_tlb_global # define __flush_tlb_one_user(addr) native_flush_tlb_one_user(addr) +# define __flush_tlb_others(msk, info) native_flush_tlb_others(msk, info) #endif /* @@ -715,8 +716,8 @@ static bool tlb_is_not_lazy(int cpu, void *data) return !per_cpu(cpu_tlbstate.is_lazy, cpu); } -void native_flush_tlb_others(const struct cpumask *cpumask, - const struct flush_tlb_info *info) +STATIC_NOPV void native_flush_tlb_others(const struct cpumask *cpumask, + const struct flush_tlb_info *info) { count_vm_tlb_event(NR_TLB_REMOTE_FLUSH); if (info->end == TLB_FLUSH_ALL) @@ -766,6 +767,12 @@ void native_flush_tlb_others(const struct cpumask *cpumask, (void *)info, 1, cpumask); } +void flush_tlb_others(const struct cpumask *cpumask, + const struct flush_tlb_info *info) +{ + __flush_tlb_others(cpumask, info); +} + /* * See Documentation/x86/tlb.rst for details. We choose 33 * because it is large enough to cover the vast majority (at |