From owner-svn-src-all@freebsd.org Sat Jun 8 16:03:35 2019 Return-Path: Delivered-To: svn-src-all@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 1D6F715AC042; Sat, 8 Jun 2019 16:03:35 +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 B58618F4D4; Sat, 8 Jun 2019 16:03:34 +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 9122A1DC63; Sat, 8 Jun 2019 16:03:34 +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 x58G3Yu3093882; Sat, 8 Jun 2019 16:03:34 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x58G3YRm093881; Sat, 8 Jun 2019 16:03:34 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201906081603.x58G3YRm093881@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Sat, 8 Jun 2019 16:03:34 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r348802 - head/sys/amd64/amd64 X-SVN-Group: head X-SVN-Commit-Author: kib X-SVN-Commit-Paths: head/sys/amd64/amd64 X-SVN-Commit-Revision: 348802 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: B58618F4D4 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.96 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.998,0]; NEURAL_HAM_SHORT(-0.97)[-0.965,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 08 Jun 2019 16:03:35 -0000 Author: kib Date: Sat Jun 8 16:03:34 2019 New Revision: 348802 URL: https://svnweb.freebsd.org/changeset/base/348802 Log: Remove lazy FPU switch support from amd64. It is incompatible with some future features. Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/sys/amd64/amd64/fpu.c Modified: head/sys/amd64/amd64/fpu.c ============================================================================== --- head/sys/amd64/amd64/fpu.c Sat Jun 8 15:24:03 2019 (r348801) +++ head/sys/amd64/amd64/fpu.c Sat Jun 8 16:03:34 2019 (r348802) @@ -154,11 +154,6 @@ static void fpu_clean_state(void); SYSCTL_INT(_hw, HW_FLOATINGPT, floatingpoint, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 1, "Floating point instructions executed in hardware"); -int lazy_fpu_switch = 0; -SYSCTL_INT(_hw, OID_AUTO, lazy_fpu_switch, CTLFLAG_RWTUN | CTLFLAG_NOFETCH, - &lazy_fpu_switch, 0, - "Lazily load FPU context after context switch"); - int use_xsave; /* non-static for cpu_switch.S */ uint64_t xsave_mask; /* the same */ static uma_zone_t fpu_save_area_zone; @@ -269,7 +264,6 @@ fpuinit_bsp1(void) uint64_t xsave_mask_user; bool old_wp; - TUNABLE_INT_FETCH("hw.lazy_fpu_switch", &lazy_fpu_switch); if (!use_xsave) return; cpuid_count(0xd, 0x0, cp); @@ -774,8 +768,7 @@ void fpu_activate_sw(struct thread *td) { - if (lazy_fpu_switch || (td->td_pflags & TDP_KTHREAD) != 0 || - !PCB_USER_FPU(td->td_pcb)) { + if ((td->td_pflags & TDP_KTHREAD) != 0 || !PCB_USER_FPU(td->td_pcb)) { PCPU_SET(fpcurthread, NULL); start_emulating(); } else if (PCPU_GET(fpcurthread) != td) {