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Thu, 25 Jun 2020 05:48:22 -0700 (PDT) Received: from [192.168.0.110] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B02CB3F73C; Thu, 25 Jun 2020 05:48:20 -0700 (PDT) Subject: Re: [PATCH v2 01/17] KVM: arm64: Factor out stage 2 page table data from struct kvm To: Marc Zyngier , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org References: <20200615132719.1932408-1-maz@kernel.org> <20200615132719.1932408-2-maz@kernel.org> From: Alexandru Elisei Message-ID: Date: Thu, 25 Jun 2020 13:49:00 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <20200615132719.1932408-2-maz@kernel.org> Content-Language: en-US Cc: kernel-team@android.com, Andre Przywara , Dave Martin , George Cherian , "Zengtao \(B\)" , Catalin Marinas , Will Deacon X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Hi, On 6/15/20 2:27 PM, Marc Zyngier wrote: > From: Christoffer Dall > > As we are about to reuse our stage 2 page table manipulation code for > shadow stage 2 page tables in the context of nested virtualization, we > are going to manage multiple stage 2 page tables for a single VM. > > This requires some pretty invasive changes to our data structures, > which moves the vmid and pgd pointers into a separate structure and > change pretty much all of our mmu code to operate on this structure > instead. > > The new structure is called struct kvm_s2_mmu. > > There is no intended functional change by this patch alone. > > Reviewed-by: James Morse > [Designed data structure layout in collaboration] > Signed-off-by: Christoffer Dall > Co-developed-by: Marc Zyngier > [maz: Moved the last_vcpu_ran down to the S2 MMU structure as well] > Signed-off-by: Marc Zyngier > --- > arch/arm64/include/asm/kvm_asm.h | 7 +- > arch/arm64/include/asm/kvm_host.h | 32 +++- > arch/arm64/include/asm/kvm_mmu.h | 16 +- > arch/arm64/kvm/arm.c | 36 ++-- > arch/arm64/kvm/hyp/switch.c | 8 +- > arch/arm64/kvm/hyp/tlb.c | 52 +++--- > arch/arm64/kvm/mmu.c | 278 +++++++++++++++++------------- > 7 files changed, 233 insertions(+), 196 deletions(-) > > [..] > > @@ -96,31 +96,33 @@ static bool kvm_is_device_pfn(unsigned long pfn) > * > * Function clears a PMD entry, flushes addr 1st and 2nd stage TLBs. > */ > -static void stage2_dissolve_pmd(struct kvm *kvm, phys_addr_t addr, pmd_t *pmd) > +static void stage2_dissolve_pmd(struct kvm_s2_mmu *mmu, phys_addr_t addr, pmd_t *pmd) The comment for the function hasn't been updated, it still mentions kvm instead of mmu. I applied your fix to __kvm_tlb_flush_local_vmid, and I was able to boot a virtual machine and run perf in it. The remaining comments from me are minor, so for what it's worth: Reviewed-by: Alexandru Elisei Thanks, Alex _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm