linux-kernel - Re: [PATCH 2/7] kvm: x86/mmu: Use kvm_mmu_invalidate_gva() in kvm_mmu_invpcid

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Date:   Thu, 2 Feb 2023 01:21:38 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Lai Jiangshan <jiangshanlai@...il.com>
Cc:     linux-kernel@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Lai Jiangshan <jiangshan.ljs@...group.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, kvm@...r.kernel.org
Subject: Re: [PATCH 2/7] kvm: x86/mmu: Use kvm_mmu_invalidate_gva() in
 kvm_mmu_invpcid_gva()

On Thu, Jan 05, 2023, Lai Jiangshan wrote:
> From: Lai Jiangshan <jiangshan.ljs@...group.com>
> 
> Use kvm_mmu_invalidate_gva() instead open calls to mmu->invlpg().
> 
> No functional change intended.
> 
> Signed-off-by: Lai Jiangshan <jiangshan.ljs@...group.com>
> ---
>  arch/x86/kvm/mmu/mmu.c | 21 +++++++--------------
>  1 file changed, 7 insertions(+), 14 deletions(-)
> 
> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> index 90339b71bd56..b0e7ac6d4e88 100644
> --- a/arch/x86/kvm/mmu/mmu.c
> +++ b/arch/x86/kvm/mmu/mmu.c
> @@ -5742,27 +5742,20 @@ EXPORT_SYMBOL_GPL(kvm_mmu_invlpg);
>  void kvm_mmu_invpcid_gva(struct kvm_vcpu *vcpu, gva_t gva, unsigned long pcid)
>  {
>  	struct kvm_mmu *mmu = vcpu->arch.mmu;
> -	bool tlb_flush = false;
> +	ulong roots_to_invalidate = 0;

"unsigned long roots" again, unless someone has a better idea.