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Subject[PATCH RFC v1 5/5] KVM: VMX: Support TSC scaling with enlightened VMCS
Date
Enlightened VMCS v1 now includes the required field for TSC scaling
feature so SECONDARY_EXEC_TSC_SCALING can remain unfiltered.

While on it, update the comment why VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL/
VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL are keept filtered out.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/vmx/evmcs.h | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kvm/vmx/evmcs.h b/arch/x86/kvm/vmx/evmcs.h
index f886a8ff0342..ffdf8955c62c 100644
--- a/arch/x86/kvm/vmx/evmcs.h
+++ b/arch/x86/kvm/vmx/evmcs.h
@@ -37,16 +37,14 @@ DECLARE_STATIC_KEY_FALSE(enable_evmcs);
* EPTP_LIST_ADDRESS = 0x00002024,
* VMREAD_BITMAP = 0x00002026,
* VMWRITE_BITMAP = 0x00002028,
- *
- * TSC_MULTIPLIER = 0x00002032,
* PLE_GAP = 0x00004020,
* PLE_WINDOW = 0x00004022,
* VMX_PREEMPTION_TIMER_VALUE = 0x0000482E,
- * GUEST_IA32_PERF_GLOBAL_CTRL = 0x00002808,
- * HOST_IA32_PERF_GLOBAL_CTRL = 0x00002c04,
*
- * Currently unsupported in KVM:
- * GUEST_IA32_RTIT_CTL = 0x00002814,
+ * While GUEST_IA32_PERF_GLOBAL_CTRL and HOST_IA32_PERF_GLOBAL_CTRL
+ * are present in eVMCSv1, Windows 11 still has issues booting when
+ * VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL/VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL
+ * are exposed to it, keep them filtered out.
*/
#define EVMCS1_UNSUPPORTED_PINCTRL (PIN_BASED_POSTED_INTR | \
PIN_BASED_VMX_PREEMPTION_TIMER)
@@ -58,7 +56,6 @@ DECLARE_STATIC_KEY_FALSE(enable_evmcs);
SECONDARY_EXEC_ENABLE_PML | \
SECONDARY_EXEC_ENABLE_VMFUNC | \
SECONDARY_EXEC_SHADOW_VMCS | \
- SECONDARY_EXEC_TSC_SCALING | \
SECONDARY_EXEC_PAUSE_LOOP_EXITING)
#define EVMCS1_UNSUPPORTED_VMEXIT_CTRL \
(VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL | \
--
2.35.3
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