Date: Sat, 23 Jun 2012 17:46:42 +0000 (UTC) From: Davide Italiano <davide@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r237487 - stable/9/sys/dev/hwpmc Message-ID: <201206231746.q5NHkgUm055144@svn.freebsd.org>
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Author: davide Date: Sat Jun 23 17:46:42 2012 New Revision: 237487 URL: http://svn.freebsd.org/changeset/base/237487 Log: MFC r237196: Disable hwpmc(4) support for Intel Xeon Sandy Bridge (Model 0x2D). Due to some differences in MSRs between Xeon Sandy Bridge and Core Sandy Bridge (Model 0x2A), wrmsr() may generate in a GP# fault exception and so a panic of the machine. Approved by: gnn (mentor) Modified: stable/9/sys/dev/hwpmc/hwpmc_intel.c Directory Properties: stable/9/sys/ (props changed) stable/9/sys/dev/ (props changed) Modified: stable/9/sys/dev/hwpmc/hwpmc_intel.c ============================================================================== --- stable/9/sys/dev/hwpmc/hwpmc_intel.c Sat Jun 23 17:42:37 2012 (r237486) +++ stable/9/sys/dev/hwpmc/hwpmc_intel.c Sat Jun 23 17:46:42 2012 (r237487) @@ -143,7 +143,6 @@ pmc_intel_initialize(void) nclasses = 5; break; case 0x2A: /* Per Intel document 253669-039US 05/2011. */ - case 0x2D: /* Per Intel document 253669-041US 12/2011. */ cputype = PMC_CPU_INTEL_SANDYBRIDGE; nclasses = 5; break;
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