Messages in this thread | | | Date | Mon, 21 Sep 2015 11:30:35 -0400 | From | Konrad Rzeszutek Wilk <> | Subject | Re: [PATCH] xen/x86: Don't try to write syscall-related MSRs for PV guests |
| |
On Mon, Sep 21, 2015 at 09:09:28AM -0400, Boris Ostrovsky wrote: > For PV guests these registers are set up by hypervisor and thus > should not be written by the guest. The comment in xen_write_msr_safe() > says so but we still write the MSRs, causing the hypervisor to > print a warning. > > Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> --- > arch/x86/xen/enlighten.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c > index 30d12af..1f1dbd2 100644 > --- a/arch/x86/xen/enlighten.c > +++ b/arch/x86/xen/enlighten.c > @@ -1077,6 +1077,7 @@ static int xen_write_msr_safe(unsigned int msr, unsigned low, unsigned high) > /* Fast syscall setup is all done in hypercalls, so > these are all ignored. Stub them out here to stop > Xen console noise. */ > + break; > > default: > if (!pmu_msr_write(msr, low, high, &ret)) > -- > 2.1.0 >
| |