Date: Wed, 10 Jan 2018 22:41:00 +0000 (UTC) From: Conrad Meyer <cem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r327801 - in head/sys: amd64/amd64 i386/i386 Message-ID: <201801102241.w0AMf0Xc055829@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: cem Date: Wed Jan 10 22:41:00 2018 New Revision: 327801 URL: https://svnweb.freebsd.org/changeset/base/327801 Log: x86: Document purpose of _safe variants of {rd,wr}msr() Sponsored by: Dell EMC Isilon Modified: head/sys/amd64/amd64/support.S head/sys/i386/i386/support.s Modified: head/sys/amd64/amd64/support.S ============================================================================== --- head/sys/amd64/amd64/support.S Wed Jan 10 22:20:49 2018 (r327800) +++ head/sys/amd64/amd64/support.S Wed Jan 10 22:41:00 2018 (r327801) @@ -763,7 +763,8 @@ ENTRY(longjmp) END(longjmp) /* - * Support for reading MSRs in the safe manner. + * Support for reading MSRs in the safe manner. (Instead of panic on #gp, + * return an error.) */ ENTRY(rdmsr_safe) /* int rdmsr_safe(u_int msr, uint64_t *data) */ @@ -783,7 +784,8 @@ ENTRY(rdmsr_safe) ret /* - * Support for writing MSRs in the safe manner. + * Support for writing MSRs in the safe manner. (Instead of panic on #gp, + * return an error.) */ ENTRY(wrmsr_safe) /* int wrmsr_safe(u_int msr, uint64_t data) */ Modified: head/sys/i386/i386/support.s ============================================================================== --- head/sys/i386/i386/support.s Wed Jan 10 22:20:49 2018 (r327800) +++ head/sys/i386/i386/support.s Wed Jan 10 22:41:00 2018 (r327801) @@ -790,7 +790,8 @@ ENTRY(longjmp) END(longjmp) /* - * Support for reading MSRs in the safe manner. + * Support for reading MSRs in the safe manner. (Instead of panic on #gp, + * return an error.) */ ENTRY(rdmsr_safe) /* int rdmsr_safe(u_int msr, uint64_t *data) */ @@ -810,7 +811,8 @@ ENTRY(rdmsr_safe) ret /* - * Support for writing MSRs in the safe manner. + * Support for writing MSRs in the safe manner. (Instead of panic on #gp, + * return an error.) */ ENTRY(wrmsr_safe) /* int wrmsr_safe(u_int msr, uint64_t data) */
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201801102241.w0AMf0Xc055829>