From: "Yang, Weijiang" <weijiang.yang@intel.com>
To: Like Xu <like.xu.linux@gmail.com>
Cc: <kan.liang@linux.intel.com>, <wei.w.wang@intel.com>,
<seanjc@google.com>, <pbonzini@redhat.com>, <jmattson@google.com>,
<kvm@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 12/15] KVM: x86/vmx: Disable Arch LBREn bit in #DB and warm reset
Date: Sun, 25 Dec 2022 12:12:21 +0800 [thread overview]
Message-ID: <f993243f-e504-cbbf-d4b9-ebf1ec64c75c@intel.com> (raw)
In-Reply-To: <195c26b7-783f-fc27-1a60-b0dcd1de01ac@gmail.com>
On 12/22/2022 7:22 PM, Like Xu wrote:
> On 25/11/2022 12:06 pm, Yang Weijiang wrote:
>> +static void disable_arch_lbr_ctl(struct kvm_vcpu *vcpu)
>> +{
>> + struct lbr_desc *lbr_desc = vcpu_to_lbr_desc(vcpu);
>> + struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
>> +
>> + if (kvm_cpu_cap_has(X86_FEATURE_ARCH_LBR) &&
>> + test_bit(INTEL_PMC_IDX_FIXED_VLBR, pmu->pmc_in_use) &&
>> + lbr_desc->event) {
>> + u64 ctl = vmcs_read64(GUEST_IA32_LBR_CTL);
>> +
>> + vmcs_write64(GUEST_IA32_LBR_CTL, ctl & ~ARCH_LBR_CTL_LBREN);
>> + }
>> +}
>> +
>> static void vmx_inject_exception(struct kvm_vcpu *vcpu)
>> {
>> struct kvm_queued_exception *ex = &vcpu->arch.exception;
>> @@ -1738,6 +1752,9 @@ static void vmx_inject_exception(struct
>> kvm_vcpu *vcpu)
>> vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
>> vmx_clear_hlt(vcpu);
>> +
>> + if (ex->vector == DB_VECTOR)
>> + disable_arch_lbr_ctl(vcpu);
>
> Please verify this with KUT testcase, once I failed and did not confirm
> if it is a hardware issue. Good Luck.
Can you detail what you want to verify with?
>
>> }
next prev parent reply other threads:[~2022-12-25 4:12 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-25 4:05 [PATCH v2 00/15] Introduce Architectural LBR for vPMU Yang Weijiang
2022-11-25 4:05 ` [PATCH v2 01/15] perf/x86/lbr: Simplify the exposure check for the LBR_INFO registers Yang Weijiang
2022-12-22 10:57 ` Like Xu
2022-12-22 13:29 ` Peter Zijlstra
2022-12-22 17:41 ` Sean Christopherson
2022-12-23 2:12 ` Like Xu
2022-12-27 11:58 ` [tip: perf/core] " tip-bot2 for Like Xu
2022-11-25 4:05 ` [PATCH v2 02/15] KVM: x86: Report XSS as an MSR to be saved if there are supported features Yang Weijiang
2022-11-25 4:05 ` [PATCH v2 03/15] KVM: x86: Refresh CPUID on writes to MSR_IA32_XSS Yang Weijiang
2023-01-26 19:50 ` Sean Christopherson
2023-01-30 6:33 ` Yang, Weijiang
2022-11-25 4:05 ` [PATCH v2 04/15] KVM: PMU: disable LBR handling if architectural LBR is available Yang Weijiang
2023-01-27 20:10 ` Sean Christopherson
2023-01-30 8:10 ` Yang, Weijiang
2022-11-25 4:05 ` [PATCH v2 05/15] KVM: vmx/pmu: Emulate MSR_ARCH_LBR_DEPTH for guest Arch LBR Yang Weijiang
2022-12-22 11:00 ` Like Xu
2022-12-25 4:30 ` Yang, Weijiang
2022-12-22 11:15 ` Like Xu
2023-01-27 20:25 ` Sean Christopherson
2023-01-30 11:46 ` Yang, Weijiang
2022-11-25 4:05 ` [PATCH v2 06/15] KVM: vmx/pmu: Emulate MSR_ARCH_LBR_CTL " Yang Weijiang
2022-12-22 11:09 ` Like Xu
2022-12-25 4:27 ` Yang, Weijiang
2022-12-22 11:19 ` Like Xu
2022-12-25 4:16 ` Yang, Weijiang
2022-12-22 11:24 ` Like Xu
2022-12-25 4:08 ` Yang, Weijiang
2023-01-27 21:42 ` Sean Christopherson
2022-11-25 4:05 ` [PATCH v2 07/15] KVM: VMX: Support passthrough of architectural LBRs Yang Weijiang
2022-11-25 4:05 ` [PATCH v2 08/15] KVM: x86: Add Arch LBR MSRs to msrs_to_save_all list Yang Weijiang
2023-01-27 21:43 ` Sean Christopherson
2023-01-30 12:27 ` Yang, Weijiang
2022-11-25 4:05 ` [PATCH v2 09/15] KVM: x86: Refine the matching and clearing logic for supported_xss Yang Weijiang
2023-01-27 21:46 ` Sean Christopherson
2023-01-30 12:37 ` Yang, Weijiang
2022-11-25 4:05 ` [PATCH v2 10/15] KVM: x86/vmx: Check Arch LBR config when return perf capabilities Yang Weijiang
2022-12-22 11:06 ` Like Xu
2022-12-25 4:28 ` Yang, Weijiang
2023-01-27 22:04 ` Sean Christopherson
2022-11-25 4:06 ` [PATCH v2 11/15] KVM: x86: Add XSAVE Support for Architectural LBR Yang Weijiang
2023-01-27 22:07 ` Sean Christopherson
2023-01-30 13:13 ` Yang, Weijiang
2022-11-25 4:06 ` [PATCH v2 12/15] KVM: x86/vmx: Disable Arch LBREn bit in #DB and warm reset Yang Weijiang
2022-12-22 11:22 ` Like Xu
2022-12-25 4:12 ` Yang, Weijiang [this message]
2023-01-27 22:09 ` Sean Christopherson
2023-01-30 13:09 ` Yang, Weijiang
2022-11-25 4:06 ` [PATCH v2 13/15] KVM: x86/vmx: Save/Restore guest Arch LBR Ctrl msr at SMM entry/exit Yang Weijiang
2023-01-27 22:11 ` Sean Christopherson
2023-01-30 12:50 ` Yang, Weijiang
2022-11-25 4:06 ` [PATCH v2 14/15] KVM: x86: Add Arch LBR data MSR access interface Yang Weijiang
2023-01-27 22:13 ` Sean Christopherson
2023-01-30 12:46 ` Yang, Weijiang
2023-01-30 17:30 ` Sean Christopherson
2023-01-31 13:14 ` Yang, Weijiang
2023-01-31 16:05 ` Sean Christopherson
2022-11-25 4:06 ` [PATCH v2 15/15] KVM: x86/cpuid: Advertise Arch LBR feature in CPUID Yang Weijiang
2022-12-22 11:03 ` Like Xu
2022-12-25 4:31 ` Yang, Weijiang
2023-01-27 22:15 ` Sean Christopherson
2023-01-12 1:57 ` [PATCH v2 00/15] Introduce Architectural LBR for vPMU Yang, Weijiang
2023-01-27 22:46 ` Sean Christopherson
2023-01-30 13:38 ` Yang, Weijiang
2023-06-05 9:50 ` Like Xu
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