@vger.kernel.org; Paolo Bonzini
Subject: Re: GPF in intel_pmu_lbr_reset() with qemu -cpu host
On Saturday 22 March 2014 14:27:59 Gleb Natapov wrote:
but now I have a NULL dereference (in rapl_pmu_init). Previously, when
`-cpu SandyBridge` was passed to qemu, it would show
Il 26/03/2014 08:23, Wu, Feng ha scritto:
Is there a solution for this issue right now? I also met this GPF crash.
Can you attach your .config?
Paolo
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Il 21/03/2014 20:09, H. Peter Anvin ha scritto:
Calling this a bug in the PMU code is ridiculous. If KVM tells the
system it os a specific vendor-family-model-stepping but diverges in
behavior then it, by definition, is broken.
Yeah, this is true. On AMD there is processor support for
On Fri, Mar 21, 2014 at 12:04:32PM -0700, Venkatesh Srinivas wrote:
On Fri, Mar 21, 2014 at 10:46 AM, Peter Wu pe...@lekensteyn.nl wrote:
[skip]
When -cpu host is used, qemu/kvm passed the host CPUID F/M/S to the
guest. intel_pmu_cpu_*() - intel_pmu_lbr_reset() uses rdmsr() /
wrmsr(), rather
On Saturday 22 March 2014 10:50:45 Gleb Natapov wrote:
On Fri, Mar 21, 2014 at 12:04:32PM -0700, Venkatesh Srinivas wrote:
On Fri, Mar 21, 2014 at 10:46 AM, Peter Wu pe...@lekensteyn.nl wrote:
[skip]
When -cpu host is used, qemu/kvm passed the host CPUID F/M/S to the
guest.
On Sat, Mar 22, 2014 at 11:05:03AM +0100, Peter Wu wrote:
On Saturday 22 March 2014 10:50:45 Gleb Natapov wrote:
On Fri, Mar 21, 2014 at 12:04:32PM -0700, Venkatesh Srinivas wrote:
On Fri, Mar 21, 2014 at 10:46 AM, Peter Wu pe...@lekensteyn.nl wrote:
[skip]
When -cpu host is used,
Using _safe has it's own issues if noone checks the errors.
On March 22, 2014 5:27:59 AM PDT, Gleb Natapov g...@kernel.org wrote:
On Sat, Mar 22, 2014 at 11:05:03AM +0100, Peter Wu wrote:
On Saturday 22 March 2014 10:50:45 Gleb Natapov wrote:
On Fri, Mar 21, 2014 at 12:04:32PM -0700, Venkatesh
On Saturday 22 March 2014 14:27:59 Gleb Natapov wrote:
but now I have a NULL dereference (in rapl_pmu_init). Previously, when
`-cpu SandyBridge` was passed to qemu, it would show this:
[0.016995] Performance Events: unsupported p6 CPU model 42 no PMU
driver, software events
cc'ing kvm people and list.
On Friday 21 March 2014 18:42:40 Peter Wu wrote:
Hi,
While trying to run QEMU with `-enable-kvm -host cpu`, I get a GPF in
intel_pmu_lbr_reset():
[0.024000] general protection fault: [#1]
[0.024000] CPU: 0 PID: 1 Comm: swapper Not tainted
On Fri, Mar 21, 2014 at 10:46 AM, Peter Wu pe...@lekensteyn.nl wrote:
cc'ing kvm people and list.
On Friday 21 March 2014 18:42:40 Peter Wu wrote:
Hi,
While trying to run QEMU with `-enable-kvm -host cpu`, I get a GPF in
intel_pmu_lbr_reset():
[0.024000] general protection fault:
Calling this a bug in the PMU code is ridiculous. If KVM tells the system it
os a specific vendor-family-model-stepping but diverges in behavior then it, by
definition, is broken.
On March 21, 2014 12:04:32 PM PDT, Venkatesh Srinivas venkate...@google.com
wrote:
On Fri, Mar 21, 2014 at 10:46
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