On 30/08/17 11:34, Sergey Dyasli wrote: > The new function is responsible for handling RDMSR from both HVM and PV > guests. Currently it handles only 2 MSRs: > > MSR_INTEL_PLATFORM_INFO > MSR_INTEL_MISC_FEATURES_ENABLES > > It has a different behaviour compared to the old MSR handlers: if MSR > is being handled by guest_rdmsr() then RDMSR will either succeed (if > a guest is allowed to access it based on its MSR policy) or produce > a GP fault. A guest will never see a H/W value of some MSR unknown to > this function. > > guest_rdmsr() unifies and replaces the handling code from > vmx_msr_read_intercept() and priv_op_read_msr(). > > Signed-off-by: Sergey Dyasli <sergey.dya...@citrix.com>
You should also note that this (along with the prep work in init_domain_msr_policy()) fixes a bug where dom0 could probe and find CPUID faulting, even though it couldn't actually use it. ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
