On Mon, Oct 31, 2022 at 07:39:01AM -0500, Scott Cheloha wrote:
| You get a #GP in your VM when trying to rdmsr(MSR_HWCR). My guess is
| we need to expand the MSR read bitmap for SVM.
|
| This patch compiles, but I can't test it. Does it fix the panic?
To test this patch, I'd have to upgrade the hypervisor. That's a bit
more involved, I'll plan it ASAP and report back, but it may be a few
days.
Thank you Scott and Mike!
Paul
| CC dv@ mlarkin@
|
| Index: vmm.c
| ===================================================================
| RCS file: /cvs/src/sys/arch/amd64/amd64/vmm.c,v
| retrieving revision 1.323
| diff -u -p -r1.323 vmm.c
| --- vmm.c 7 Sep 2022 18:44:09 -0000 1.323
| +++ vmm.c 31 Oct 2022 12:38:30 -0000
| @@ -2705,6 +2705,10 @@ vcpu_reset_regs_svm(struct vcpu *vcpu, s
| /* allow reading TSC */
| svm_setmsrbr(vcpu, MSR_TSC);
|
| + /* allow reading HWCR and PSTATEDEF for TSC calibration */
| + svm_setmsrbr(vcpu, MSR_HWCR);
| + svm_setmsrbr(vcpu, MSR_PSTATEDEF(0));
| +
| /* Guest VCPU ASID */
| if (vmm_alloc_vpid(&asid)) {
| DPRINTF("%s: could not allocate asid\n", __func__);
|
--
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