On 8.11.23 г. 20:29 ч., Xin Li wrote:
> Add FRED related VMCS fields to dump_vmcs() to have it dump FRED context.
>
> Tested-by: Shan Kang <shan.kang@intel.com>
> Signed-off-by: Xin Li <xin3.li@intel.com>
> ---
> arch/x86/kvm/vmx/vmx.c | 48 ++++++++++++++++++++++++++++++++++++------
> 1 file changed, 41 insertions(+), 7 deletions(-)
>
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index 518e68ee5a0d..b826dc188fc7 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -6429,7 +6429,7 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
> struct vcpu_vmx *vmx = to_vmx(vcpu);
> u32 vmentry_ctl, vmexit_ctl;
> u32 cpu_based_exec_ctrl, pin_based_exec_ctrl, secondary_exec_control;
> - u64 tertiary_exec_control;
> + u64 tertiary_exec_control, secondary_vmexit_ctl;
> unsigned long cr4;
> int efer_slot;
>
> @@ -6440,6 +6440,8 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
>
> vmentry_ctl = vmcs_read32(VM_ENTRY_CONTROLS);
> vmexit_ctl = vmcs_read32(VM_EXIT_CONTROLS);
> + secondary_vmexit_ctl = cpu_has_secondary_vmexit_ctrls() ?
> + vmcs_read64(SECONDARY_VM_EXIT_CONTROLS) : 0;
> cpu_based_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
> pin_based_exec_ctrl = vmcs_read32(PIN_BASED_VM_EXEC_CONTROL);
> cr4 = vmcs_readl(GUEST_CR4);
> @@ -6486,6 +6488,19 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
> vmx_dump_sel("LDTR:", GUEST_LDTR_SELECTOR);
> vmx_dump_dtsel("IDTR:", GUEST_IDTR_LIMIT);
> vmx_dump_sel("TR: ", GUEST_TR_SELECTOR);
> +#ifdef CONFIG_X86_64
> + if (cpu_feature_enabled(X86_FEATURE_FRED)) {
Shouldn't this be gated on whether FRED is enabled in kvm aka the CPUID
bit is enumerated ?
<snip>
> > @@ -6440,6 +6440,8 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
> >
> > vmentry_ctl = vmcs_read32(VM_ENTRY_CONTROLS);
> > vmexit_ctl = vmcs_read32(VM_EXIT_CONTROLS);
> > + secondary_vmexit_ctl = cpu_has_secondary_vmexit_ctrls() ?
> > + vmcs_read64(SECONDARY_VM_EXIT_CONTROLS) : 0;
> > cpu_based_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
> > pin_based_exec_ctrl = vmcs_read32(PIN_BASED_VM_EXEC_CONTROL);
> > cr4 = vmcs_readl(GUEST_CR4);
> > @@ -6486,6 +6488,19 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
> > vmx_dump_sel("LDTR:", GUEST_LDTR_SELECTOR);
> > vmx_dump_dtsel("IDTR:", GUEST_IDTR_LIMIT);
> > vmx_dump_sel("TR: ", GUEST_TR_SELECTOR);
> > +#ifdef CONFIG_X86_64
> > + if (cpu_feature_enabled(X86_FEATURE_FRED)) {
>
> Shouldn't this be gated on whether FRED is enabled in kvm aka the CPUID bit is
> enumerated ?
Yeah, that is more accurate.
@@ -6429,7 +6429,7 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
struct vcpu_vmx *vmx = to_vmx(vcpu);
u32 vmentry_ctl, vmexit_ctl;
u32 cpu_based_exec_ctrl, pin_based_exec_ctrl, secondary_exec_control;
- u64 tertiary_exec_control;
+ u64 tertiary_exec_control, secondary_vmexit_ctl;
unsigned long cr4;
int efer_slot;
@@ -6440,6 +6440,8 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
vmentry_ctl = vmcs_read32(VM_ENTRY_CONTROLS);
vmexit_ctl = vmcs_read32(VM_EXIT_CONTROLS);
+ secondary_vmexit_ctl = cpu_has_secondary_vmexit_ctrls() ?
+ vmcs_read64(SECONDARY_VM_EXIT_CONTROLS) : 0;
cpu_based_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
pin_based_exec_ctrl = vmcs_read32(PIN_BASED_VM_EXEC_CONTROL);
cr4 = vmcs_readl(GUEST_CR4);
@@ -6486,6 +6488,19 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
vmx_dump_sel("LDTR:", GUEST_LDTR_SELECTOR);
vmx_dump_dtsel("IDTR:", GUEST_IDTR_LIMIT);
vmx_dump_sel("TR: ", GUEST_TR_SELECTOR);
+#ifdef CONFIG_X86_64
+ if (cpu_feature_enabled(X86_FEATURE_FRED)) {
+ pr_err("FRED guest: config=0x%016llx, stack levels=0x%016llx\n"
+ "RSP0=0x%016lx, RSP1=0x%016llx\n"
+ "RSP2=0x%016llx, RSP3=0x%016llx\n",
+ vmcs_read64(GUEST_IA32_FRED_CONFIG),
+ vmcs_read64(GUEST_IA32_FRED_STKLVLS),
+ read_msr(MSR_IA32_FRED_RSP0),
+ vmcs_read64(GUEST_IA32_FRED_RSP1),
+ vmcs_read64(GUEST_IA32_FRED_RSP2),
+ vmcs_read64(GUEST_IA32_FRED_RSP3));
+ }
+#endif
efer_slot = vmx_find_loadstore_msr_slot(&vmx->msr_autoload.guest, MSR_EFER);
if (vmentry_ctl & VM_ENTRY_LOAD_IA32_EFER)
pr_err("EFER= 0x%016llx\n", vmcs_read64(GUEST_IA32_EFER));
@@ -6533,6 +6548,19 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
vmcs_readl(HOST_TR_BASE));
pr_err("GDTBase=%016lx IDTBase=%016lx\n",
vmcs_readl(HOST_GDTR_BASE), vmcs_readl(HOST_IDTR_BASE));
+#ifdef CONFIG_X86_64
+ if (cpu_feature_enabled(X86_FEATURE_FRED)) {
+ pr_err("FRED host: config=0x%016llx, stack levels=0x%016llx\n"
+ "RSP0=0x%016llx, RSP1=0x%016llx\n"
+ "RSP2=0x%016llx, RSP3=0x%016llx\n",
+ vmcs_read64(HOST_IA32_FRED_CONFIG),
+ vmcs_read64(HOST_IA32_FRED_STKLVLS),
+ vmx->msr_host_fred_rsp0,
+ vmcs_read64(HOST_IA32_FRED_RSP1),
+ vmcs_read64(HOST_IA32_FRED_RSP2),
+ vmcs_read64(HOST_IA32_FRED_RSP3));
+ }
+#endif
pr_err("CR0=%016lx CR3=%016lx CR4=%016lx\n",
vmcs_readl(HOST_CR0), vmcs_readl(HOST_CR3),
vmcs_readl(HOST_CR4));
@@ -6554,25 +6582,31 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
pr_err("*** Control State ***\n");
pr_err("CPUBased=0x%08x SecondaryExec=0x%08x TertiaryExec=0x%016llx\n",
cpu_based_exec_ctrl, secondary_exec_control, tertiary_exec_control);
- pr_err("PinBased=0x%08x EntryControls=%08x ExitControls=%08x\n",
- pin_based_exec_ctrl, vmentry_ctl, vmexit_ctl);
+ pr_err("PinBased=0x%08x EntryControls=0x%08x\n",
+ pin_based_exec_ctrl, vmentry_ctl);
+ pr_err("ExitControls=0x%08x SecondaryExitControls=0x%016llx\n",
+ vmexit_ctl, secondary_vmexit_ctl);
pr_err("ExceptionBitmap=%08x PFECmask=%08x PFECmatch=%08x\n",
vmcs_read32(EXCEPTION_BITMAP),
vmcs_read32(PAGE_FAULT_ERROR_CODE_MASK),
vmcs_read32(PAGE_FAULT_ERROR_CODE_MATCH));
- pr_err("VMEntry: intr_info=%08x errcode=%08x ilen=%08x\n",
+ pr_err("VMEntry: intr_info=%08x errcode=%08x ilen=%08x event data=%016llx\n",
vmcs_read32(VM_ENTRY_INTR_INFO_FIELD),
vmcs_read32(VM_ENTRY_EXCEPTION_ERROR_CODE),
- vmcs_read32(VM_ENTRY_INSTRUCTION_LEN));
+ vmcs_read32(VM_ENTRY_INSTRUCTION_LEN),
+ cpu_feature_enabled(X86_FEATURE_FRED) ?
+ vmcs_read64(INJECTED_EVENT_DATA) : 0);
pr_err("VMExit: intr_info=%08x errcode=%08x ilen=%08x\n",
vmcs_read32(VM_EXIT_INTR_INFO),
vmcs_read32(VM_EXIT_INTR_ERROR_CODE),
vmcs_read32(VM_EXIT_INSTRUCTION_LEN));
pr_err(" reason=%08x qualification=%016lx\n",
vmcs_read32(VM_EXIT_REASON), vmcs_readl(EXIT_QUALIFICATION));
- pr_err("IDTVectoring: info=%08x errcode=%08x\n",
+ pr_err("IDTVectoring: info=%08x errcode=%08x event data=%016llx\n",
vmcs_read32(IDT_VECTORING_INFO_FIELD),
- vmcs_read32(IDT_VECTORING_ERROR_CODE));
+ vmcs_read32(IDT_VECTORING_ERROR_CODE),
+ cpu_feature_enabled(X86_FEATURE_FRED) ?
+ vmcs_read64(ORIGINAL_EVENT_DATA) : 0);
pr_err("TSC Offset = 0x%016llx\n", vmcs_read64(TSC_OFFSET));
if (secondary_exec_control & SECONDARY_EXEC_TSC_SCALING)
pr_err("TSC Multiplier = 0x%016llx\n",