Commit-ID: c5e260890d5fd6687287f2b532c738a359a61a82 Gitweb: https://git.kernel.org/tip/c5e260890d5fd6687287f2b532c738a359a61a82 Author: Tom Lendacky <[email protected]> AuthorDate: Wed, 1 Nov 2017 11:54:26 -0500 Committer: Ingo Molnar <[email protected]> CommitDate: Tue, 7 Nov 2017 12:16:14 +0100
x86/mm: Remove unnecessary TLB flush for SME in-place encryption A TLB flush is not required when doing in-place encryption or decryption since the area's pagetable attributes are not being altered. To avoid confusion between what the routine is doing and what is documented in the AMD APM, delete the local_flush_tlb() call. Suggested-by: Dave Hansen <[email protected]> Signed-off-by: Tom Lendacky <[email protected]> Reviewed-by: Borislav Petkov <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/mm/mem_encrypt.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c index 16c5f37..53680a9 100644 --- a/arch/x86/mm/mem_encrypt.c +++ b/arch/x86/mm/mem_encrypt.c @@ -63,7 +63,6 @@ static void __init __sme_early_enc_dec(resource_size_t paddr, if (!sme_me_mask) return; - local_flush_tlb(); wbinvd(); /*
