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| author | Juergen Gross <jgross@suse.com> | 2017-11-13 10:24:50 +0100 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2017-11-13 10:24:50 +0100 |
| commit | 3a485c2be49dde899e506684bb5f06d5b3f73e82 (patch) | |
| tree | e013f4d121199d60b70043f525aef4a7e641b5f6 /arch/x86/include/asm/tlb.h | |
| parent | 569dbb88e80deb68974ef6fdd6a13edb9d686261 (diff) | |
| parent | bebc6082da0a9f5d47a1ea2edc099bf671058bd4 (diff) | |
| download | linux-3a485c2be49dde899e506684bb5f06d5b3f73e82.tar.bz2 | |
Merge tag 'v4.14' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/torvalds/linux
Linux 4.14
Diffstat (limited to 'arch/x86/include/asm/tlb.h')
| -rw-r--r-- | arch/x86/include/asm/tlb.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/include/asm/tlb.h b/arch/x86/include/asm/tlb.h index c7797307fc2b..cb0a1f470980 100644 --- a/arch/x86/include/asm/tlb.h +++ b/arch/x86/include/asm/tlb.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_TLB_H #define _ASM_X86_TLB_H @@ -15,4 +16,18 @@ #include <asm-generic/tlb.h> +/* + * While x86 architecture in general requires an IPI to perform TLB + * shootdown, enablement code for several hypervisors overrides + * .flush_tlb_others hook in pv_mmu_ops and implements it by issuing + * a hypercall. To keep software pagetable walkers safe in this case we + * switch to RCU based table free (HAVE_RCU_TABLE_FREE). See the comment + * below 'ifdef CONFIG_HAVE_RCU_TABLE_FREE' in include/asm-generic/tlb.h + * for more details. + */ +static inline void __tlb_remove_table(void *table) +{ + free_page_and_swap_cache(table); +} + #endif /* _ASM_X86_TLB_H */ |