[RFC PATCH v7 00/13] coco: guest: Add a shared-granule allocator for host-shared memory · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
[RFC PATCH v7 01/13] arm64: realm: Add RHI helper to query IPA state change alignment · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
[RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Catalin Marinas <catalin.marinas@arm.com> · 2026-09-22
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Jason Gunthorpe <jgg@ziepe.ca> · 2026-09-22
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Suzuki K Poulose <suzuki.poulose@arm.com> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Aneesh Kumar K.V <aneesh.kumar@kernel.org> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Aneesh Kumar K.V <aneesh.kumar@kernel.org> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Catalin Marinas <catalin.marinas@arm.com> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Catalin Marinas <catalin.marinas@arm.com> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Aneesh Kumar K.V <aneesh.kumar@kernel.org> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Aneesh Kumar K.V <aneesh.kumar@kernel.org> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Catalin Marinas <catalin.marinas@arm.com> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Jason Gunthorpe <jgg@ziepe.ca> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Aneesh Kumar K.V <aneesh.kumar@kernel.org> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Suzuki K Poulose <suzuki.poulose@arm.com> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Jason Gunthorpe <jgg@ziepe.ca> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Kameron Carr <hidden> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Jason Gunthorpe <jgg@ziepe.ca> · 2026-09-23
RE: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Michael Kelley <hidden> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Jason Gunthorpe <jgg@ziepe.ca> · 2026-09-23
Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory · Mostafa Saleh <smostafa@google.com> · 2026-09-23
[RFC PATCH v7 03/13] arm64: realm: Expose the CCA shared granule size through mem_encrypt ops · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
[RFC PATCH v7 04/13] irqchip/gic-v3-its: Resolve the default NUMA node explicitly · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
[RFC PATCH v7 05/13] irqchip/gic-v3-its: Allocate shared tables using CoCo shared memory allocator · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
[RFC PATCH v7 06/13] dma-contiguous: Accept an explicit minimum alignment · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
Re: [RFC PATCH v7 06/13] dma-contiguous: Accept an explicit minimum alignment · Catalin Marinas <catalin.marinas@arm.com> · 2026-09-23
Re: [RFC PATCH v7 06/13] dma-contiguous: Accept an explicit minimum alignment · Aneesh Kumar K.V <aneesh.kumar@kernel.org> · 2026-09-23
Re: [RFC PATCH v7 06/13] dma-contiguous: Accept an explicit minimum alignment · Catalin Marinas <catalin.marinas@arm.com> · 2026-09-23
[RFC PATCH v7 07/13] dma-pool: Allocate CoCo atomic pools using CoCo shared memory allocator · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
[RFC PATCH v7 08/13] dma-direct: Align CoCo shared DMA allocations to the shared granule size · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
[RFC PATCH v7 09/13] swiotlb: Align shared IO TLB pools to the shared granule size · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
[RFC PATCH v7 10/13] swiotlb: Reject misaligned restricted DMA pools for CoCo guests · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
[RFC PATCH v7 11/13] dma-buf: system_heap: Limit scatterlist entries to the buffer size · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
[RFC PATCH v7 12/13] dma-buf: system_heap: Allocate shared buffers using CoCo shared memory allocator · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21
Re: [RFC PATCH v7 12/13] dma-buf: system_heap: Allocate shared buffers using CoCo shared memory allocator · Catalin Marinas <catalin.marinas@arm.com> · 2026-09-22
Re: [RFC PATCH v7 12/13] dma-buf: system_heap: Allocate shared buffers using CoCo shared memory allocator · Aneesh Kumar K.V <aneesh.kumar@kernel.org> · 2026-09-23
Re: [RFC PATCH v7 12/13] dma-buf: system_heap: Allocate shared buffers using CoCo shared memory allocator · Christian König <christian.koenig@amd.com> · 2026-09-23
[RFC PATCH v7 13/13] swiotlb: Make rounded shared pool capacity allocatable · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org> · 2026-09-21

Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory

From: Jason Gunthorpe <jgg@ziepe.ca>
Date: 2026-09-22 17:26:48
Also in: dri-devel, kvmarm, linux-coco, linux-iommu, linux-media, linux-mm, lkml

On Tue, Sep 22, 2026 at 05:25:58PM +0100, Catalin Marinas wrote:

Does the memset() post sharing logic work for pKVM as well? If nothing
clears it, we have a small window where guest data is leaked to the
host.

Same question for RMM? Or did they define that the RMM zeros on these
transitions?

Jason

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