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SubjectRe: [PATCH 1/3] xen/pv: allow pmu msr accesses to cause GP
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On 9/26/22 10:18 AM, Juergen Gross wrote:
> bool pmu_msr_read(unsigned int msr, uint64_t *val, int *err)
> {
> if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL) {
> - if (is_amd_pmu_msr(msr)) {
> - if (!xen_amd_pmu_emulate(msr, val, 1))
> - *val = native_read_msr_safe(msr, err);
> - return true;
> + if (!is_amd_pmu_msr(msr))


You should be able to move vendor check inside is_<vendor>_pmu_msr().


-boris


> + return false;
> + if (!xen_amd_pmu_emulate(msr, val, 1)) {
> + *val = err ? native_read_msr_safe(msr, err)
> + : native_read_msr(msr);
> }
> + return true;
> } else {

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