linux-kernel - Re: [PATCH v2] KVM: x86/mmu: Only allocate shadowed translation cache for sp->role.level <= KVM_MAX_HUGEPAGE

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Date: Tue,  4 Jun 2024 16:29:41 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, kvm@...r.kernel.org, 
	Hou Wenlong <houwenlong.hwl@...group.com>
Cc: Lai Jiangshan <jiangshan.ljs@...group.com>, Paolo Bonzini <pbonzini@...hat.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>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] KVM: x86/mmu: Only allocate shadowed translation cache
 for sp->role.level <= KVM_MAX_HUGEPAGE_LEVEL

On Sat, 11 May 2024 11:46:37 +0800, Hou Wenlong wrote:
> Only the indirect SP with sp->role.level <= KVM_MAX_HUGEPAGE_LEVEL might
> have leaf gptes, so allocation of shadowed translation cache is needed
> only for it. Then, it can use sp->shadowed_translation to determine
> whether to use the information in the shadowed translation cache or not.
> Also, extend the WARN in FNAME(sync_spte)() to ensure that this won't
> break shadow_mmu_get_sp_for_split().
> 
> [...]

Applied to kvm-x86 mmu, thanks!

[1/1] KVM: x86/mmu: Only allocate shadowed translation cache for sp->role.level <= KVM_MAX_HUGEPAGE_LEVEL
      https://github.com/kvm-x86/linux/commit/9ecc1c119b28

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https://github.com/kvm-x86/linux/tree/next