From: Jason Gunthorpe <jgg@ziepe.ca>
To: Alistair Popple <apopple@nvidia.com>
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 1/5] arm64/smmu: Use TLBI ASID when invalidating entire range
Date: Fri, 21 Jul 2023 16:25:47 -0300 [thread overview]
Message-ID: <ZLrbu6vk6x7l6xwJ@ziepe.ca> (raw)
In-Reply-To: <082390057ec33969c81d49d35aa3024d7082b0bd.1689842332.git-series.apopple@nvidia.com>
On Thu, Jul 20, 2023 at 06:39:23PM +1000, Alistair Popple wrote:
> The ARM SMMU has a specific command for invalidating the TLB for an
> entire ASID. Currently this is used for the IO_PGTABLE API but not for
> ATS when called from the MMU notifier.
>
> The current implementation of notifiers does not attempt to invalidate
> such a large address range, instead walking each VMA and invalidating
> each range individually during mmap removal. However in future SMMU
> TLB invalidations are going to be sent as part of the normal
> flush_tlb_*() kernel calls. To better deal with that add handling to
> use TLBI ASID when invalidating the entire address space.
>
> Signed-off-by: Alistair Popple <apopple@nvidia.com>
> ---
> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 16 +++++++++++++---
> 1 file changed, 13 insertions(+), 3 deletions(-)
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Jason
next prev parent reply other threads:[~2023-07-21 19:25 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-20 8:39 [PATCH v3 0/5] Invalidate secondary IOMMU TLB on permission upgrade Alistair Popple
2023-07-20 8:39 ` [PATCH v3 1/5] arm64/smmu: Use TLBI ASID when invalidating entire range Alistair Popple
2023-07-21 19:25 ` Jason Gunthorpe [this message]
2023-07-20 8:39 ` [PATCH v3 2/5] mmu_notifiers: Fixup comment in mmu_interval_read_begin() Alistair Popple
2023-07-21 19:26 ` Jason Gunthorpe
2023-07-20 8:39 ` [PATCH v3 3/5] mmu_notifiers: Call invalidate_range() when invalidating TLBs Alistair Popple
2023-07-21 18:25 ` Catalin Marinas
2023-07-21 19:27 ` Jason Gunthorpe
2023-07-20 8:39 ` [PATCH v3 4/5] mmu_notifiers: Don't invalidate secondary TLBs as part of mmu_notifier_invalidate_range_end() Alistair Popple
2023-07-21 19:29 ` Jason Gunthorpe
2023-07-20 8:39 ` [PATCH v3 5/5] mmu_notifiers: Rename invalidate_range notifier Alistair Popple
2023-07-21 18:25 ` Catalin Marinas
2023-07-21 19:31 ` Jason Gunthorpe
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