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[PATCH for-4.17 v2 1/3] hvm/msr: load VIRT_SPEC_CTRL
- To: xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Roger Pau Monne <roger.pau@xxxxxxxxxx>
- Date: Fri, 28 Oct 2022 13:49:11 +0200
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- Cc: Henry.Wang@xxxxxxx, Roger Pau Monne <roger.pau@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Add MSR_VIRT_SPEC_CTRL to the list of MSRs handled by
hvm_load_cpu_msrs(), or else it would be lost.
Fixes: 8ffd5496f4 ('amd/msr: implement VIRT_SPEC_CTRL for HVM guests on top of
SPEC_CTRL')
Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
I'm confused as to why we have two different list of MSR to send and
load, one in msrs_to_send[] and the other open-coded in
hvm_load_cpu_msrs(), but given the release status it's no time to
clean that up.
---
Changes since v1:
- New in this version.
---
xen/arch/x86/hvm/hvm.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 44b432ec5a..15a9b34c59 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -1498,6 +1498,7 @@ static int cf_check hvm_load_cpu_msrs(struct domain *d,
hvm_domain_context_t *h)
case MSR_INTEL_MISC_FEATURES_ENABLES:
case MSR_IA32_BNDCFGS:
case MSR_IA32_XSS:
+ case MSR_VIRT_SPEC_CTRL:
case MSR_AMD64_DR0_ADDRESS_MASK:
case MSR_AMD64_DR1_ADDRESS_MASK ... MSR_AMD64_DR3_ADDRESS_MASK:
rc = guest_wrmsr(v, ctxt->msr[i].index, ctxt->msr[i].val);
--
2.37.3
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