lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 01 Nov 2017 11:54:26 -0500 From: Tom Lendacky <thomas.lendacky@....com> To: x86@...nel.org Cc: Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org, Dave Hansen <dave.hansen@...el.com>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, "H. Peter Anvin" <hpa@...or.com>, Thomas Gleixner <tglx@...utronix.de> Subject: [PATCH] x86/mm: Remove unneeded TLB flush for 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 <dave.hansen@...el.com> Signed-off-by: Tom Lendacky <thomas.lendacky@....com> --- 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(); /*
Powered by blists - more mailing lists