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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1ig4np-0004yZ-Q2; Sat, 14 Dec 2019 10:37:37 +0000 Received: from inca-roads.misterjones.org ([213.251.177.50]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1ig4nl-0004y8-5O for linux-arm-kernel@lists.infradead.org; Sat, 14 Dec 2019 10:37:35 +0000 Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=big-swifty.misterjones.org) by cheepnis.misterjones.org with esmtpsa (TLSv1.2:AES256-GCM-SHA384:256) (Exim 4.80) (envelope-from ) id 1ig4nM-0004C7-WF; Sat, 14 Dec 2019 11:37:09 +0100 Date: Sat, 14 Dec 2019 10:37:10 +0000 Message-ID: <86fthni46h.wl-maz@kernel.org> From: Marc Zyngier To: Suzuki Kuruppassery Poulose Subject: Re: [PATCH 1/7] KVM: Pass mmu_notifier_range down to kvm_unmap_hva_range() In-Reply-To: References: <20191213182503.14460-1-maz@kernel.org> <20191213182503.14460-2-maz@kernel.org> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 EasyPG/1.0.0 Emacs/26 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: suzuki.poulose@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, jhogan@kernel.org, paulus@ozlabs.org, pbonzini@redhat.com, rkrcmar@redhat.com, sean.j.christopherson@intel.com, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, kvm-ppc@vger.kernel.org, kvm@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on cheepnis.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191214_023733_347673_8EFD90B5 X-CRM114-Status: GOOD ( 16.57 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm-ppc@vger.kernel.org, Wanpeng Li , kvm@vger.kernel.org, Radim =?UTF-8?B?S3LEjW3DocWZ?= , James Hogan , Joerg Roedel , linux-mips@vger.kernel.org, Sean Christopherson , Paul Mackerras , James Morse , linux-arm-kernel@lists.infradead.org, Paolo Bonzini , Vitaly Kuznetsov , kvmarm@lists.cs.columbia.edu, Julien Thierry , Jim Mattson Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Suzuki, On Fri, 13 Dec 2019 18:59:32 +0000, Suzuki Kuruppassery Poulose wrote: > > Hi Marc, > > > On 13/12/2019 18:24, Marc Zyngier wrote: > > kvm_unmap_hva_range() is currently passed both start and end > > fields from the mmu_notifier_range structure. As this struct > > now contains important information about the reason of the > > unmap (the event field), replace the start/end parameters > > with the range struct, and update all architectures. > > > > No functionnal change. > > > > Signed-off-by: Marc Zyngier > > > > diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c > > index 00268290dcbd..7c3665ad1035 100644 > > --- a/virt/kvm/kvm_main.c > > +++ b/virt/kvm/kvm_main.c > > @@ -158,7 +158,7 @@ static unsigned long long kvm_createvm_count; > > static unsigned long long kvm_active_vms; > > __weak int kvm_arch_mmu_notifier_invalidate_range(struct kvm > > *kvm, > > - unsigned long start, unsigned long end, bool blockable) > > + const struct mmu_notifier_range *range, bool blockable) > > { > > return 0; > > } > > @@ -415,7 +415,7 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, > > * count is also read inside the mmu_lock critical section. > > */ > > kvm->mmu_notifier_count++; > > - need_tlb_flush = kvm_unmap_hva_range(kvm, range->start, range->end); > > + need_tlb_flush = kvm_unmap_hva_range(kvm, range); > > need_tlb_flush |= kvm->tlbs_dirty; > > /* we've to flush the tlb before the pages can be freed */ > > if (need_tlb_flush) > > @@ -423,8 +423,7 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, > > spin_unlock(&kvm->mmu_lock); > > - ret = kvm_arch_mmu_notifier_invalidate_range(kvm, > > range->start, > > - range->end, > > + ret = kvm_arch_mmu_notifier_invalidate_range(kvm, range, > > mmu_notifier_range_blockable(range)); > > minor nit: > > Since we now have the range passed on to the arch hooks, we could get > rid of the "blockable" too, as it is something you can deduce from the > range. Absolutely. That'd be a nice cleanup. > Otherwise looks good to me. Thanks, M. -- Jazz is not dead, it just smells funny. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel