From owner-dev-commits-src-branches@freebsd.org Thu Sep 2 00:53:02 2021 Return-Path: Delivered-To: dev-commits-src-branches@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 02BB5675607; Thu, 2 Sep 2021 00:53:02 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4H0Mq16X5Qz3k1b; Thu, 2 Sep 2021 00:53:01 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id C7B897059; Thu, 2 Sep 2021 00:53:01 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 1820r19Q067176; Thu, 2 Sep 2021 00:53:01 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 1820r13q067175; Thu, 2 Sep 2021 00:53:01 GMT (envelope-from git) Date: Thu, 2 Sep 2021 00:53:01 GMT Message-Id: <202109020053.1820r13q067175@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Konstantin Belousov Subject: git: ebc0d29e14f0 - stable/13 - amd64: remove lfence after swapgs on syscall entry MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kib X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: ebc0d29e14f08b76908ed872815ffe3d01df9a79 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-branches@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commits to the stable branches of the FreeBSD src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 02 Sep 2021 00:53:02 -0000 The branch stable/13 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=ebc0d29e14f08b76908ed872815ffe3d01df9a79 commit ebc0d29e14f08b76908ed872815ffe3d01df9a79 Author: Konstantin Belousov AuthorDate: 2021-08-25 19:28:57 +0000 Commit: Konstantin Belousov CommitDate: 2021-09-02 00:52:24 +0000 amd64: remove lfence after swapgs on syscall entry (cherry picked from commit 7aa47cace14948a7b8277a4b24a0ca9e0308990a) --- sys/amd64/amd64/exception.S | 2 -- 1 file changed, 2 deletions(-) diff --git a/sys/amd64/amd64/exception.S b/sys/amd64/amd64/exception.S index 3fb518179406..bd9f235626eb 100644 --- a/sys/amd64/amd64/exception.S +++ b/sys/amd64/amd64/exception.S @@ -525,7 +525,6 @@ prot_addrf: SUPERALIGN_TEXT IDTVEC(fast_syscall_pti) swapgs - lfence cmpq $~0,PCPU(UCR3) je fast_syscall_common movq %rax,PCPU(SCRATCH_RAX) @@ -536,7 +535,6 @@ IDTVEC(fast_syscall_pti) SUPERALIGN_TEXT IDTVEC(fast_syscall) swapgs - lfence fast_syscall_common: movq %rsp,PCPU(SCRATCH_RSP) movq PCPU(RSP0),%rsp