diff options
| author | Jonathan Gray <jsg@cvs.openbsd.org> | 2020-05-27 05:08:55 +0000 |
|---|---|---|
| committer | Jonathan Gray <jsg@cvs.openbsd.org> | 2020-05-27 05:08:55 +0000 |
| commit | c0dcaa8320c05398821426c561cf380faa6b9f2e (patch) | |
| tree | 88bdcdb4e06321c5c7ceba6155901d8020da1ed6 /sys/arch | |
| parent | c0812dafa60c5dca2e09569275910da4498ccc60 (diff) | |
don't limit clflush to Intel CPUs
discussed with deraadt@
Diffstat (limited to 'sys/arch')
| -rw-r--r-- | sys/arch/amd64/amd64/identcpu.c | 7 | ||||
| -rw-r--r-- | sys/arch/i386/i386/machdep.c | 22 |
2 files changed, 16 insertions, 13 deletions
diff --git a/sys/arch/amd64/amd64/identcpu.c b/sys/arch/amd64/amd64/identcpu.c index 000886abb47..de4b7c3050b 100644 --- a/sys/arch/amd64/amd64/identcpu.c +++ b/sys/arch/amd64/amd64/identcpu.c @@ -1,4 +1,4 @@ -/* $OpenBSD: identcpu.c,v 1.114 2020/03/17 03:09:04 dlg Exp $ */ +/* $OpenBSD: identcpu.c,v 1.115 2020/05/27 05:08:53 jsg Exp $ */ /* $NetBSD: identcpu.c,v 1.1 2003/04/26 18:39:28 fvdl Exp $ */ /* @@ -716,8 +716,8 @@ identifycpu(struct cpu_info *ci) if (ci->ci_feature_sefflags_ebx & SEFF0EBX_SMAP) replacesmap(); } -#ifndef SMALL_KERNEL - if (!strncmp(mycpu_model, "Intel", 5)) { + + if (ci->ci_feature_flags & CPUID_CFLUSH) { u_int32_t cflushsz; CPUID(0x01, dummy, cflushsz, dummy, dummy); @@ -725,6 +725,7 @@ identifycpu(struct cpu_info *ci) ci->ci_cflushsz = ((cflushsz >> 8) & 0xff) * 8; } +#ifndef SMALL_KERNEL if (CPU_IS_PRIMARY(ci) && (ci->ci_feature_tpmflags & TPM_SENSOR)) { strlcpy(ci->ci_sensordev.xname, ci->ci_dev->dv_xname, sizeof(ci->ci_sensordev.xname)); diff --git a/sys/arch/i386/i386/machdep.c b/sys/arch/i386/i386/machdep.c index a6f059d7802..5c7fdb19c0b 100644 --- a/sys/arch/i386/i386/machdep.c +++ b/sys/arch/i386/i386/machdep.c @@ -1,4 +1,4 @@ -/* $OpenBSD: machdep.c,v 1.633 2020/05/16 14:44:44 kettenis Exp $ */ +/* $OpenBSD: machdep.c,v 1.634 2020/05/27 05:08:54 jsg Exp $ */ /* $NetBSD: machdep.c,v 1.214 1996/11/10 03:16:17 thorpej Exp $ */ /*- @@ -1847,6 +1847,17 @@ identifycpu(struct cpu_info *ci) } } + if (ci->ci_feature_flags & CPUID_CFLUSH) { + u_int regs[4]; + + /* to get the cacheline size you must do cpuid + * with eax 0x01 + */ + + cpuid(0x01, regs); + ci->ci_cflushsz = ((regs[1] >> 8) & 0xff) * 8; + } + if (vendor == CPUVENDOR_INTEL) { u_int regs[4]; /* @@ -1860,15 +1871,6 @@ identifycpu(struct cpu_info *ci) if (ci->ci_family == 6 && ci->ci_model < 15) ci->ci_feature_flags &= ~CPUID_PAT; - if (ci->ci_feature_flags & CPUID_CFLUSH) { - /* to get the cacheline size you must do cpuid - * with eax 0x01 - */ - - cpuid(0x01, regs); - ci->ci_cflushsz = ((regs[1] >> 8) & 0xff) * 8; - } - if (cpuid_level >= 0x1) { cpuid(0x80000000, regs); if (regs[0] >= 0x80000006) |