Date: Sun, 17 Jun 2012 13:48:39 +0000 (UTC) From: Davide Italiano <davide@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r237196 - head/sys/dev/hwpmc Message-ID: <201206171348.q5HDmdW3011037@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: davide Date: Sun Jun 17 13:48:39 2012 New Revision: 237196 URL: http://svn.freebsd.org/changeset/base/237196 Log: 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) MFC after: 3 days Modified: head/sys/dev/hwpmc/hwpmc_intel.c Modified: head/sys/dev/hwpmc/hwpmc_intel.c ============================================================================== --- head/sys/dev/hwpmc/hwpmc_intel.c Sun Jun 17 13:03:50 2012 (r237195) +++ head/sys/dev/hwpmc/hwpmc_intel.c Sun Jun 17 13:48:39 2012 (r237196) @@ -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;
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201206171348.q5HDmdW3011037>