svn commit: r242565 - head/sys/dev/cpuctl
Andriy Gapon
avg at FreeBSD.org
Sun Nov 4 13:46:28 UTC 2012
Author: avg
Date: Sun Nov 4 13:46:28 2012
New Revision: 242565
URL: http://svn.freebsd.org/changeset/base/242565
Log:
cpuctl_do_cpuid: explicitly use ecx=0 for cpuid call
... instead of whatever random value may happen to be in the register.
ecx is important to some cpuid leaves.
To do: extend cpuctl interface to provide for ecx value parameter.
MFC after: 5 days
Modified:
head/sys/dev/cpuctl/cpuctl.c
Modified: head/sys/dev/cpuctl/cpuctl.c
==============================================================================
--- head/sys/dev/cpuctl/cpuctl.c Sun Nov 4 13:42:34 2012 (r242564)
+++ head/sys/dev/cpuctl/cpuctl.c Sun Nov 4 13:46:28 2012 (r242565)
@@ -204,7 +204,7 @@ cpuctl_do_cpuid(int cpu, cpuctl_cpuid_ar
oldcpu = td->td_oncpu;
is_bound = cpu_sched_is_bound(td);
set_cpu(cpu, td);
- do_cpuid(data->level, data->data);
+ cpuid_count(data->level, 0, data->data);
restore_cpu(oldcpu, is_bound, td);
return (0);
}
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