Date: Sun, 23 Jun 2019 11:09:08 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r349304 - stable/12/sys/amd64/amd64 Message-ID: <201906231109.x5NB98tU098889@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: kib Date: Sun Jun 23 11:09:08 2019 New Revision: 349304 URL: https://svnweb.freebsd.org/changeset/base/349304 Log: MFC r348802: Remove lazy FPU switch support from amd64. For the merge, the hw.lazy_fpu_switch sysctl was kept but made read-only with the value of 0. Modified: stable/12/sys/amd64/amd64/fpu.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/amd64/amd64/fpu.c ============================================================================== --- stable/12/sys/amd64/amd64/fpu.c Sun Jun 23 11:04:34 2019 (r349303) +++ stable/12/sys/amd64/amd64/fpu.c Sun Jun 23 11:09:08 2019 (r349304) @@ -155,7 +155,7 @@ SYSCTL_INT(_hw, HW_FLOATINGPT, floatingpoint, CTLFLAG_ 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, +SYSCTL_INT(_hw, OID_AUTO, lazy_fpu_switch, CTLFLAG_RD, &lazy_fpu_switch, 0, "Lazily load FPU context after context switch"); @@ -269,7 +269,6 @@ 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 +773,7 @@ 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) {
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201906231109.x5NB98tU098889>