From owner-svn-src-head@freebsd.org Thu Jan 11 12:40:44 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C811CE5C5E1; Thu, 11 Jan 2018 12:40:44 +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 TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A24006E0B2; Thu, 11 Jan 2018 12:40:44 +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 BDC4314F32; Thu, 11 Jan 2018 12:40:43 +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 w0BCehwK008192; Thu, 11 Jan 2018 12:40:43 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w0BCehuj008189; Thu, 11 Jan 2018 12:40:43 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201801111240.w0BCehuj008189@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Thu, 11 Jan 2018 12:40:43 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r327818 - in head/sys/amd64: amd64 include X-SVN-Group: head X-SVN-Commit-Author: kib X-SVN-Commit-Paths: in head/sys/amd64: amd64 include X-SVN-Commit-Revision: 327818 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Jan 2018 12:40:44 -0000 Author: kib Date: Thu Jan 11 12:40:43 2018 New Revision: 327818 URL: https://svnweb.freebsd.org/changeset/base/327818 Log: Move the hardware setup for fast syscalls into a common function. Discussed with: jhb Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/sys/amd64/amd64/machdep.c head/sys/amd64/amd64/mp_machdep.c head/sys/amd64/include/md_var.h Modified: head/sys/amd64/amd64/machdep.c ============================================================================== --- head/sys/amd64/amd64/machdep.c Thu Jan 11 12:28:08 2018 (r327817) +++ head/sys/amd64/amd64/machdep.c Thu Jan 11 12:40:43 2018 (r327818) @@ -1512,6 +1512,22 @@ amd64_kdb_init(void) #endif } +/* Set up the fast syscall stuff */ +void +amd64_conf_fast_syscall(void) +{ + uint64_t msr; + + msr = rdmsr(MSR_EFER) | EFER_SCE; + wrmsr(MSR_EFER, msr); + wrmsr(MSR_LSTAR, (u_int64_t)IDTVEC(fast_syscall)); + wrmsr(MSR_CSTAR, (u_int64_t)IDTVEC(fast_syscall32)); + msr = ((u_int64_t)GSEL(GCODE_SEL, SEL_KPL) << 32) | + ((u_int64_t)GSEL(GUCODE32_SEL, SEL_UPL) << 48); + wrmsr(MSR_STAR, msr); + wrmsr(MSR_SF_MASK, PSL_NT | PSL_T | PSL_I | PSL_C | PSL_D); +} + u_int64_t hammer_time(u_int64_t modulep, u_int64_t physfree) { @@ -1520,7 +1536,6 @@ hammer_time(u_int64_t modulep, u_int64_t physfree) struct pcpu *pc; struct nmi_pcpu *np; struct xstate_hdr *xhdr; - u_int64_t msr; char *env; size_t kstack0_sz; int late_console; @@ -1663,15 +1678,7 @@ hammer_time(u_int64_t modulep, u_int64_t physfree) gsel_tss = GSEL(GPROC0_SEL, SEL_KPL); ltr(gsel_tss); - /* Set up the fast syscall stuff */ - msr = rdmsr(MSR_EFER) | EFER_SCE; - wrmsr(MSR_EFER, msr); - wrmsr(MSR_LSTAR, (u_int64_t)IDTVEC(fast_syscall)); - wrmsr(MSR_CSTAR, (u_int64_t)IDTVEC(fast_syscall32)); - msr = ((u_int64_t)GSEL(GCODE_SEL, SEL_KPL) << 32) | - ((u_int64_t)GSEL(GUCODE32_SEL, SEL_UPL) << 48); - wrmsr(MSR_STAR, msr); - wrmsr(MSR_SF_MASK, PSL_NT|PSL_T|PSL_I|PSL_C|PSL_D); + amd64_conf_fast_syscall(); /* * Temporary forge some valid pointer to PCB, for exception Modified: head/sys/amd64/amd64/mp_machdep.c ============================================================================== --- head/sys/amd64/amd64/mp_machdep.c Thu Jan 11 12:28:08 2018 (r327817) +++ head/sys/amd64/amd64/mp_machdep.c Thu Jan 11 12:40:43 2018 (r327818) @@ -89,8 +89,6 @@ extern struct pcpu __pcpu[]; char *doublefault_stack; char *nmi_stack; -extern inthand_t IDTVEC(fast_syscall), IDTVEC(fast_syscall32); - /* * Local data and functions. */ @@ -190,7 +188,7 @@ init_secondary(void) { struct pcpu *pc; struct nmi_pcpu *np; - u_int64_t msr, cr0; + u_int64_t cr0; int cpu, gsel_tss, x; struct region_descriptor ap_gdt; @@ -265,15 +263,7 @@ init_secondary(void) cr0 &= ~(CR0_CD | CR0_NW | CR0_EM); load_cr0(cr0); - /* Set up the fast syscall stuff */ - msr = rdmsr(MSR_EFER) | EFER_SCE; - wrmsr(MSR_EFER, msr); - wrmsr(MSR_LSTAR, (u_int64_t)IDTVEC(fast_syscall)); - wrmsr(MSR_CSTAR, (u_int64_t)IDTVEC(fast_syscall32)); - msr = ((u_int64_t)GSEL(GCODE_SEL, SEL_KPL) << 32) | - ((u_int64_t)GSEL(GUCODE32_SEL, SEL_UPL) << 48); - wrmsr(MSR_STAR, msr); - wrmsr(MSR_SF_MASK, PSL_NT|PSL_T|PSL_I|PSL_C|PSL_D); + amd64_conf_fast_syscall(); /* signal our startup to the BSP. */ mp_naps++; Modified: head/sys/amd64/include/md_var.h ============================================================================== --- head/sys/amd64/include/md_var.h Thu Jan 11 12:28:08 2018 (r327817) +++ head/sys/amd64/include/md_var.h Thu Jan 11 12:40:43 2018 (r327818) @@ -42,6 +42,7 @@ extern int hw_lower_amd64_sharedpage; struct savefpu; struct sysentvec; +void amd64_conf_fast_syscall(void); void amd64_db_resume_dbreg(void); void amd64_lower_shared_page(struct sysentvec *); void amd64_syscall(struct thread *td, int traced);