From: Paolo Bonzini <pbonzini@redhat.com>
To: Yang Weijiang <weijiang.yang@intel.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
sean.j.christopherson@intel.com, jmattson@google.com
Cc: yu.c.zhang@linux.intel.com
Subject: Re: [PATCH v14 09/13] KVM: x86: Report CET MSRs as to-be-saved if CET is supported
Date: Thu, 28 Jan 2021 18:46:37 +0100 [thread overview]
Message-ID: <732d1da2-70d7-1f8a-b41d-136e068516d7@redhat.com> (raw)
In-Reply-To: <20201106011637.14289-10-weijiang.yang@intel.com>
On 06/11/20 02:16, Yang Weijiang wrote:
> Report all CET MSRs, including the synthetic GUEST_SSP MSR, as
> to-be-saved, e.g. for migration, if CET is supported by KVM.
>
> Co-developed-by: Sean Christopherson <sean.j.christopherson@intel.com>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
> Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
> ---
> arch/x86/kvm/x86.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 751b62e871e5..d573cadf5baf 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -1248,6 +1248,8 @@ static const u32 msrs_to_save_all[] = {
> MSR_ARCH_PERFMON_EVENTSEL0 + 16, MSR_ARCH_PERFMON_EVENTSEL0 + 17,
>
> MSR_IA32_XSS,
> + MSR_IA32_U_CET, MSR_IA32_S_CET, MSR_IA32_INT_SSP_TAB, MSR_KVM_GUEST_SSP,
> + MSR_IA32_PL0_SSP, MSR_IA32_PL1_SSP, MSR_IA32_PL2_SSP, MSR_IA32_PL3_SSP,
> };
>
> static u32 msrs_to_save[ARRAY_SIZE(msrs_to_save_all)];
> @@ -5761,6 +5763,13 @@ static void kvm_init_msr_list(void)
> if (!supported_xss)
> continue;
> break;
> + case MSR_IA32_U_CET:
> + case MSR_IA32_S_CET:
> + case MSR_IA32_INT_SSP_TAB:
> + case MSR_IA32_PL0_SSP ... MSR_IA32_PL3_SSP:
> + if (!kvm_cet_supported())
> + continue;
> + break;
> default:
> break;
> }
>
Missing "case MSR_KVM_GUEST_SSP".
Paolo
next prev parent reply other threads:[~2021-01-28 17:51 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-06 1:16 [PATCH v14 00/13] Introduce support for guest CET feature Yang Weijiang
2020-11-06 1:16 ` [PATCH v14 01/13] KVM: x86: Report XSS as an MSR to be saved if there are supported features Yang Weijiang
2020-11-06 1:16 ` [PATCH v14 02/13] KVM: x86: Refresh CPUID on writes to MSR_IA32_XSS Yang Weijiang
2020-11-06 1:16 ` [PATCH v14 03/13] KVM: x86: Add #CP support in guest exception dispatch Yang Weijiang
2020-11-06 1:16 ` [PATCH v14 04/13] KVM: VMX: Introduce CET VMCS fields and flags Yang Weijiang
2020-11-06 1:16 ` [PATCH v14 05/13] KVM: x86: Add fault checks for CR4.CET Yang Weijiang
2020-11-09 10:44 ` kernel test robot
2020-11-06 1:16 ` [PATCH v14 06/13] KVM: x86: Load guest fpu state when accessing MSRs managed by XSAVES Yang Weijiang
2020-11-06 1:16 ` [PATCH v14 07/13] KVM: VMX: Emulate reads and writes to CET MSRs Yang Weijiang
2021-01-28 17:45 ` Paolo Bonzini
2021-01-29 8:07 ` Yang Weijiang
2020-11-06 1:16 ` [PATCH v14 08/13] KVM: VMX: Add a synthetic MSR to allow userspace VMM to access GUEST_SSP Yang Weijiang
2021-01-28 17:41 ` Paolo Bonzini
2021-01-28 17:42 ` Paolo Bonzini
2020-11-06 1:16 ` [PATCH v14 09/13] KVM: x86: Report CET MSRs as to-be-saved if CET is supported Yang Weijiang
2020-11-09 6:17 ` kernel test robot
2021-01-28 17:46 ` Paolo Bonzini [this message]
2021-01-29 8:08 ` Yang Weijiang
2020-11-06 1:16 ` [PATCH v14 10/13] KVM: x86: Enable CET virtualization for VMX and advertise CET to userspace Yang Weijiang
2020-11-09 7:23 ` kernel test robot
2021-01-28 17:53 ` Paolo Bonzini
[not found] ` <20210129112437.GA29715@local-michael-cet-test.sh.intel.com>
[not found] ` <68e288ee-6e09-36f1-a6c9-bed864eb7678@redhat.com>
[not found] ` <20210129121717.GA30243@local-michael-cet-test.sh.intel.com>
[not found] ` <1cf7e501-2c69-8b76-9332-42db1348ab08@redhat.com>
2021-01-30 6:32 ` Yang Weijiang
2021-02-01 4:56 ` Yang Weijiang
2020-11-06 1:16 ` [PATCH v14 11/13] KVM: VMX: Pass through CET MSRs to the guest when supported Yang Weijiang
2021-01-28 17:54 ` Paolo Bonzini
2021-01-28 18:04 ` Paolo Bonzini
2020-11-06 1:16 ` [PATCH v14 12/13] KVM: nVMX: Add helper to check the vmcs01 MSR bitmap for MSR pass-through Yang Weijiang
2020-11-06 1:16 ` [PATCH v14 13/13] KVM: nVMX: Enable CET support for nested VMX Yang Weijiang
2021-01-28 17:57 ` [PATCH v14 00/13] Introduce support for guest CET feature Paolo Bonzini
2021-01-28 18:04 ` Sean Christopherson
2021-01-28 18:06 ` Paolo Bonzini
2021-01-28 18:24 ` Sean Christopherson
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