[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v5 7/9] x86/paravirt: Add paravirt_{read, write}_msr
On 02/04/16 15:01, Andy Lutomirski wrote: > This adds paravirt hooks for unsafe MSR access. On native, they > call native_{read,write}_msr. On Xen, they use > xen_{read,write}_msr_safe. > > Nothing uses them yet for ease of bisection. The next patch will > use them in rdmsrl, wrmsrl, etc. > > I intentionally didn't make them warn on #GP on Xen. I think that > should be done separately by the Xen maintainers. ... > --- a/arch/x86/xen/enlighten.c > +++ b/arch/x86/xen/enlighten.c Reviewed-by: David Vrabel <david.vrabel@xxxxxxxxxx> > @@ -1092,6 +1092,26 @@ static int xen_write_msr_safe(unsigned int msr, > unsigned low, unsigned high) > return ret; > } > > +static u64 xen_read_msr(unsigned int msr) > +{ > + /* > + * This will silently swallow a #GP from RDMSR. It may be worth > + * changing that. This probably isn't important. David _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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