From nobody Sat Oct 23 18:20:33 2021 X-Original-To: dev-commits-src-main@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 104A91802A7B; Sat, 23 Oct 2021 18:20:34 +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 4Hc8fB00Htz4wk9; Sat, 23 Oct 2021 18:20:34 +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 D3C0F26E08; Sat, 23 Oct 2021 18:20:33 +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 19NIKX9H016583; Sat, 23 Oct 2021 18:20:33 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 19NIKXSM016582; Sat, 23 Oct 2021 18:20:33 GMT (envelope-from git) Date: Sat, 23 Oct 2021 18:20:33 GMT Message-Id: <202110231820.19NIKXSM016582@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Dimitry Andric Subject: git: 4b9725184e31 - main - Fix clang's internal assembler adding unwanted prefix to VIA xstore List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-main@freebsd.org X-BeenThere: dev-commits-src-main@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: dim X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 4b9725184e315596aa401cecb230033c6d6d5f29 Auto-Submitted: auto-generated X-ThisMailContainsUnwantedMimeParts: N The branch main has been updated by dim: URL: https://cgit.FreeBSD.org/src/commit/?id=4b9725184e315596aa401cecb230033c6d6d5f29 commit 4b9725184e315596aa401cecb230033c6d6d5f29 Author: Dimitry Andric AuthorDate: 2021-10-23 18:19:26 +0000 Commit: Dimitry Andric CommitDate: 2021-10-23 18:20:00 +0000 Fix clang's internal assembler adding unwanted prefix to VIA xstore Merge commit 2d8c18fbbdd1 from llvm git (by Jessica Clarke): [X86] Don't add implicit REP prefix to VIA PadLock xstore Commit 8fa3e8fa1492 added an implicit REP prefix to all VIA PadLock instructions, but GNU as doesn't add one to xstore, only all the others. This resulted in a kernel panic regression in FreeBSD upon updating to LLVM 11 (https://bugs.freebsd.org/259218) which includes the commit in question. This partially reverts that commit. Reviewed By: craig.topper Differential Revision: https://reviews.llvm.org/D112355 MFC after: 3 days --- contrib/llvm-project/llvm/lib/Target/X86/X86InstrSystem.td | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/contrib/llvm-project/llvm/lib/Target/X86/X86InstrSystem.td b/contrib/llvm-project/llvm/lib/Target/X86/X86InstrSystem.td index eb8740896e5d..89b6dbdab5dc 100644 --- a/contrib/llvm-project/llvm/lib/Target/X86/X86InstrSystem.td +++ b/contrib/llvm-project/llvm/lib/Target/X86/X86InstrSystem.td @@ -585,7 +585,7 @@ def XRSTORS64 : RI<0xC7, MRM3m, (outs), (ins opaquemem:$dst), //===----------------------------------------------------------------------===// // VIA PadLock crypto instructions let Defs = [RAX, RDI], Uses = [RDX, RDI], SchedRW = [WriteSystem] in - def XSTORE : I<0xa7, MRM_C0, (outs), (ins), "xstore", []>, TB, REP; + def XSTORE : I<0xa7, MRM_C0, (outs), (ins), "xstore", []>, TB; def : InstAlias<"xstorerng", (XSTORE)>;