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Fri, 21 Jul 2023 12:31:07 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.95) (envelope-from ) id 1qMvqE-003IGg-98; Fri, 21 Jul 2023 16:31:06 -0300 Date: Fri, 21 Jul 2023 16:31:06 -0300 From: Jason Gunthorpe To: Alistair Popple Cc: akpm@linux-foundation.org, ajd@linux.ibm.com, catalin.marinas@arm.com, fbarrat@linux.ibm.com, iommu@lists.linux.dev, jhubbard@nvidia.com, kevin.tian@intel.com, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au, nicolinc@nvidia.com, npiggin@gmail.com, robin.murphy@arm.com, seanjc@google.com, will@kernel.org, x86@kernel.org, zhi.wang.linux@gmail.com, sj@kernel.org Subject: Re: [PATCH v3 5/5] mmu_notifiers: Rename invalidate_range notifier Message-ID: References: <3cbd2a644d56d503b47cfc35868d547f924f880e.1689842332.git-series.apopple@nvidia.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <3cbd2a644d56d503b47cfc35868d547f924f880e.1689842332.git-series.apopple@nvidia.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230721_123111_568912_DD762C0D X-CRM114-Status: GOOD ( 15.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jul 20, 2023 at 06:39:27PM +1000, Alistair Popple wrote: > There are two main use cases for mmu notifiers. One is by KVM which > uses mmu_notifier_invalidate_range_start()/end() to manage a software > TLB. > > The other is to manage hardware TLBs which need to use the > invalidate_range() callback because HW can establish new TLB entries > at any time. Hence using start/end() can lead to memory corruption as > these callbacks happen too soon/late during page unmap. > > mmu notifier users should therefore either use the start()/end() > callbacks or the invalidate_range() callbacks. To make this usage > clearer rename the invalidate_range() callback to > arch_invalidate_secondary_tlbs() and update documention. > > Signed-off-by: Alistair Popple > Suggested-by: Jason Gunthorpe > --- > arch/arm64/include/asm/tlbflush.h | 6 +- > arch/powerpc/mm/book3s64/radix_hugetlbpage.c | 2 +- > arch/powerpc/mm/book3s64/radix_tlb.c | 10 ++-- > arch/x86/include/asm/tlbflush.h | 2 +- > arch/x86/mm/tlb.c | 2 +- > drivers/iommu/amd/iommu_v2.c | 10 ++-- > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 13 ++--- > drivers/iommu/intel/svm.c | 8 +-- > drivers/misc/ocxl/link.c | 8 +-- > include/linux/mmu_notifier.h | 48 +++++++++--------- > mm/huge_memory.c | 4 +- > mm/hugetlb.c | 7 +-- > mm/mmu_notifier.c | 20 ++++++-- > 13 files changed, 76 insertions(+), 64 deletions(-) Reviewed-by: Jason Gunthorpe Jason _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel