Author: kib Date: Wed Jan 31 14:25:42 2018 New Revision: 328624 URL: https://svnweb.freebsd.org/changeset/base/328624
Log: Do not enable PTI when IA32_ARCH_CAP_RDCL_NO bit is set. Intel document 336996-001 claims that this will be the way to inform about Meltdown correction. Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/sys/x86/x86/identcpu.c Modified: head/sys/x86/x86/identcpu.c ============================================================================== --- head/sys/x86/x86/identcpu.c Wed Jan 31 13:40:36 2018 (r328623) +++ head/sys/x86/x86/identcpu.c Wed Jan 31 14:25:42 2018 (r328624) @@ -1614,7 +1614,8 @@ pti_get_default(void) if (strcmp(cpu_vendor, AMD_VENDOR_ID) == 0) return (0); - + if ((cpu_ia32_arch_caps & IA32_ARCH_CAP_RDCL_NO) != 0) + return (0); return (1); } _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"