From: Paolo Bonzini <pbonzini@redhat.com>
To: Sean Christopherson <seanjc@google.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Chenyi Qiang <chenyi.qiang@intel.com>,
Lei Wang <lei4.wang@intel.com>
Subject: Re: [PATCH 1/2] KVM: VMX: Sanitize VM-Entry/VM-Exit control pairs at kvm_intel load time
Date: Thu, 26 May 2022 12:39:54 +0200 [thread overview]
Message-ID: <8baca98e-63d6-f7dd-067b-05f8e0dc381f@redhat.com> (raw)
In-Reply-To: <20220525210447.2758436-2-seanjc@google.com>
On 5/25/22 23:04, Sean Christopherson wrote:
>
> +#define VMCS_ENTRY_EXIT_PAIR(name, entry_action, exit_action) \
> + { VM_ENTRY_##entry_action##_##name, VM_EXIT_##exit_action##_##name }
> +
> static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf,
> struct vmx_capability *vmx_cap)
> {
> @@ -2473,6 +2476,24 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf,
> u64 _cpu_based_3rd_exec_control = 0;
> u32 _vmexit_control = 0;
> u32 _vmentry_control = 0;
> + int i;
> +
> + /*
> + * LOAD/SAVE_DEBUG_CONTROLS are absent because both are mandatory.
> + * SAVE_IA32_PAT and SAVE_IA32_EFER are absent because KVM always
> + * intercepts writes to PAT and EFER, i.e. never enables those controls.
> + */
> + struct {
> + u32 entry_control;
> + u32 exit_control;
> + } vmcs_entry_exit_pairs[] = {
> + VMCS_ENTRY_EXIT_PAIR(IA32_PERF_GLOBAL_CTRL, LOAD, LOAD),
> + VMCS_ENTRY_EXIT_PAIR(IA32_PAT, LOAD, LOAD),
> + VMCS_ENTRY_EXIT_PAIR(IA32_EFER, LOAD, LOAD),
> + VMCS_ENTRY_EXIT_PAIR(BNDCFGS, LOAD, CLEAR),
> + VMCS_ENTRY_EXIT_PAIR(IA32_RTIT_CTL, LOAD, CLEAR),
> + VMCS_ENTRY_EXIT_PAIR(IA32_LBR_CTL, LOAD, CLEAR),
No macros please, it's just as clear to expand them especially since the
#define is far from the struct definition.
Paolo
next prev parent reply other threads:[~2022-05-26 10:40 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-25 21:04 [PATCH 0/2] KVM: VMX: Sanitize VM-Entry/VM-Exit pairs during setup Sean Christopherson
2022-05-25 21:04 ` [PATCH 1/2] KVM: VMX: Sanitize VM-Entry/VM-Exit control pairs at kvm_intel load time Sean Christopherson
2022-05-25 23:27 ` Yuan Yao
2022-05-26 0:42 ` Sean Christopherson
2022-05-26 1:04 ` Yuan Yao
2022-05-26 10:39 ` Paolo Bonzini [this message]
2022-05-26 21:35 ` Sean Christopherson
2022-05-27 9:44 ` Paolo Bonzini
2022-05-25 21:04 ` [PATCH 2/2] KVM: VMX: Add knob to allow rejecting kvm_intel on inconsistent VMCS config Sean Christopherson
2022-05-25 21:17 ` Jim Mattson
2022-05-26 0:45 ` Sean Christopherson
2022-05-26 1:00 ` Jim Mattson
2022-05-26 10:39 ` Paolo Bonzini
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