linux-kernel - Re: [PATCH 2/4] KVM: x86/mmu: Defer "full" MMU setup until after vendor hardware

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Message-ID: <Ys3uDJ90dBeFFbka@xz-m1.local>
Date:   Tue, 12 Jul 2022 17:56:28 -0400
From:   Peter Xu <peterx@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] KVM: x86/mmu: Defer "full" MMU setup until after
 vendor hardware_setup()

On Fri, Jun 24, 2022 at 11:27:33PM +0000, Sean Christopherson wrote:
> @@ -11937,6 +11932,10 @@ int kvm_arch_hardware_setup(void *opaque)
>  
>  	kvm_ops_update(ops);
>  
> +	r = kvm_mmu_hardware_setup();
> +	if (r)
> +		goto out_unsetup;
> +
>  	kvm_register_perf_callbacks(ops->handle_intel_pt_intr);
>  
>  	if (!kvm_cpu_cap_has(X86_FEATURE_XSAVES))
> @@ -11960,12 +11959,18 @@ int kvm_arch_hardware_setup(void *opaque)
>  	kvm_caps.default_tsc_scaling_ratio = 1ULL << kvm_caps.tsc_scaling_ratio_frac_bits;
>  	kvm_init_msr_list();
>  	return 0;
> +
> +out_unsetup:
> +	static_call(kvm_x86_hardware_unsetup)();

Should this be kvm_mmu_hardware_unsetup()?  Or did I miss something?..

-- 
Peter Xu