From owner-svn-src-stable-12@freebsd.org Sat Mar 23 10:37:27 2019 Return-Path: Delivered-To: svn-src-stable-12@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 082331548A76; Sat, 23 Mar 2019 10:37:27 +0000 (UTC) (envelope-from kib@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) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9B93489F4C; Sat, 23 Mar 2019 10:37:26 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 7872B7253; Sat, 23 Mar 2019 10:37:26 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x2NAbQeL092083; Sat, 23 Mar 2019 10:37:26 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x2NAbQ4X092082; Sat, 23 Mar 2019 10:37:26 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201903231037.x2NAbQ4X092082@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Sat, 23 Mar 2019 10:37:26 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r345443 - stable/12/sys/amd64/amd64 X-SVN-Group: stable-12 X-SVN-Commit-Author: kib X-SVN-Commit-Paths: stable/12/sys/amd64/amd64 X-SVN-Commit-Revision: 345443 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 9B93489F4C X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.97 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_SHORT(-0.97)[-0.968,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-stable-12@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for only the 12-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 23 Mar 2019 10:37:27 -0000 Author: kib Date: Sat Mar 23 10:37:26 2019 New Revision: 345443 URL: https://svnweb.freebsd.org/changeset/base/345443 Log: MFC r345225: amd64: rewrite cpu_switch.S fragment to reload tss.rsp0 on context switch. Modified: stable/12/sys/amd64/amd64/cpu_switch.S Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/amd64/amd64/cpu_switch.S ============================================================================== --- stable/12/sys/amd64/amd64/cpu_switch.S Sat Mar 23 10:13:01 2019 (r345442) +++ stable/12/sys/amd64/amd64/cpu_switch.S Sat Mar 23 10:37:26 2019 (r345443) @@ -209,14 +209,11 @@ do_kthread: done_tss: movq %r8,PCPU(RSP0) movq %r8,PCPU(CURPCB) - /* Update the TSS_RSP0 pointer for the next interrupt */ - cmpq $~0,PCPU(UCR3) - je 1f movq PCPU(PTI_RSP0),%rax + cmpq $~0,PCPU(UCR3) + cmove %r8,%rax movq %rax,TSS_RSP0(%rdx) - jmp 2f -1: movq %r8,TSS_RSP0(%rdx) -2: movq %r12,PCPU(CURTHREAD) /* into next thread */ + movq %r12,PCPU(CURTHREAD) /* into next thread */ /* Test if debug registers should be restored. */ testl $PCB_DBREGS,PCB_FLAGS(%r8)