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[35.195.168.105]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43bcb96b0c5sm18735925e9.19.2025.03.04.01.03.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Mar 2025 01:03:30 -0800 (PST) Date: Tue, 4 Mar 2025 09:03:26 +0000 From: Vincent Donnefort To: Oliver Upton Cc: maz@kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, qperret@google.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, kernel-team@android.com Subject: Re: [PATCH] KVM: arm64: Count pKVM stage-2 usage in secondary pagetable stats Message-ID: References: <20250228121355.1377891-1-vdonnefort@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Mar 03, 2025 at 01:18:35PM -0800, Oliver Upton wrote: > On Fri, Feb 28, 2025 at 12:13:55PM +0000, Vincent Donnefort wrote: > > Count the pages used by pKVM for the guest stage-2 in memory stats under > > secondary pagetable stats, similarly to what the VHE mode does. > > > > Signed-off-by: Vincent Donnefort > > > > diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c > > index 1f55b0c7b11d..c2e022c41313 100644 > > --- a/arch/arm64/kvm/mmu.c > > +++ b/arch/arm64/kvm/mmu.c > > @@ -1088,12 +1088,18 @@ void kvm_free_stage2_pgd(struct kvm_s2_mmu *mmu) > > > > static void hyp_mc_free_fn(void *addr, void *unused) > > { > > + kvm_account_pgtable_pages(addr, -1); > > free_page((unsigned long)addr); > > } > > Don't we drain more than just stage-2 page tables into the teardown_mc > (e.g. vcpu structs)? Sigh, yes we do. I've left behind some changes we have in our Android branches. Let me respin a proper version :-\ > > Thanks, > Oliver