From: Jason Gunthorpe <jgg@ziepe.ca>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>,
linux-coco@lists.linux.dev, kvmarm@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, iommu@lists.linux.dev,
Andrew Morton <akpm@linux-foundation.org>,
christian.koenig@amd.com, Joerg Roedel <joro@8bytes.org>,
Marc Zyngier <maz@kernel.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Robin Murphy <robin.murphy@arm.com>,
Steven Price <steven.price@arm.com>,
Sumit Semwal <sumit.semwal@linaro.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Thomas Gleixner <tglx@kernel.org>, Will Deacon <will@kernel.org>,
dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org,
linux-media@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory
Date: Tue, 22 Sep 2026 13:51:47 -0300 [thread overview]
Message-ID: <20260922165147.GD1540250@ziepe.ca> (raw)
In-Reply-To: <arKsFofudnTYpXj1@arm.com>
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
next prev parent reply other threads:[~2026-09-22 17:26 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-21 14:48 [RFC PATCH v7 00/13] coco: guest: Add a shared-granule allocator for host-shared memory Aneesh Kumar K.V (Arm)
2026-09-21 14:48 ` [RFC PATCH v7 01/13] arm64: realm: Add RHI helper to query IPA state change alignment Aneesh Kumar K.V (Arm)
2026-09-21 14:48 ` [RFC PATCH v7 02/13] mm: Add an allocator for CoCo shared memory Aneesh Kumar K.V (Arm)
2026-09-22 16:25 ` Catalin Marinas
2026-09-22 16:51 ` Jason Gunthorpe [this message]
2026-09-23 0:33 ` Suzuki K Poulose
2026-09-23 5:53 ` Aneesh Kumar K.V
2026-09-23 8:31 ` Aneesh Kumar K.V
2026-09-23 10:10 ` Catalin Marinas
2026-09-23 9:42 ` Catalin Marinas
2026-09-23 9:59 ` Aneesh Kumar K.V
2026-09-23 10:28 ` Aneesh Kumar K.V
2026-09-23 10:40 ` Catalin Marinas
2026-09-23 13:06 ` Jason Gunthorpe
2026-09-23 14:58 ` Aneesh Kumar K.V
2026-09-23 15:11 ` Suzuki K Poulose
2026-09-23 15:21 ` Jason Gunthorpe
2026-09-23 16:28 ` Kameron Carr
2026-09-23 17:23 ` Jason Gunthorpe
2026-09-23 18:36 ` Michael Kelley
2026-09-23 13:00 ` Jason Gunthorpe
2026-09-23 15:20 ` Mostafa Saleh
2026-09-21 14:48 ` [RFC PATCH v7 03/13] arm64: realm: Expose the CCA shared granule size through mem_encrypt ops Aneesh Kumar K.V (Arm)
2026-09-21 14:48 ` [RFC PATCH v7 04/13] irqchip/gic-v3-its: Resolve the default NUMA node explicitly Aneesh Kumar K.V (Arm)
2026-09-21 14:48 ` [RFC PATCH v7 05/13] irqchip/gic-v3-its: Allocate shared tables using CoCo shared memory allocator Aneesh Kumar K.V (Arm)
2026-09-21 14:48 ` [RFC PATCH v7 06/13] dma-contiguous: Accept an explicit minimum alignment Aneesh Kumar K.V (Arm)
2026-09-23 10:35 ` Catalin Marinas
2026-09-23 11:49 ` Aneesh Kumar K.V
2026-09-23 13:49 ` Catalin Marinas
2026-09-21 14:48 ` [RFC PATCH v7 07/13] dma-pool: Allocate CoCo atomic pools using CoCo shared memory allocator Aneesh Kumar K.V (Arm)
2026-09-21 14:48 ` [RFC PATCH v7 08/13] dma-direct: Align CoCo shared DMA allocations to the shared granule size Aneesh Kumar K.V (Arm)
2026-09-21 14:48 ` [RFC PATCH v7 09/13] swiotlb: Align shared IO TLB pools " Aneesh Kumar K.V (Arm)
2026-09-21 14:48 ` [RFC PATCH v7 10/13] swiotlb: Reject misaligned restricted DMA pools for CoCo guests Aneesh Kumar K.V (Arm)
2026-09-21 14:48 ` [RFC PATCH v7 11/13] dma-buf: system_heap: Limit scatterlist entries to the buffer size Aneesh Kumar K.V (Arm)
2026-09-21 14:48 ` [RFC PATCH v7 12/13] dma-buf: system_heap: Allocate shared buffers using CoCo shared memory allocator Aneesh Kumar K.V (Arm)
2026-09-22 16:39 ` Catalin Marinas
2026-09-23 8:32 ` Aneesh Kumar K.V
2026-09-23 8:46 ` Christian König
2026-09-21 14:48 ` [RFC PATCH v7 13/13] swiotlb: Make rounded shared pool capacity allocatable Aneesh Kumar K.V (Arm)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260922165147.GD1540250@ziepe.ca \
--to=jgg@ziepe.ca \
--cc=akpm@linux-foundation.org \
--cc=aneesh.kumar@kernel.org \
--cc=catalin.marinas@arm.com \
--cc=christian.koenig@amd.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=iommu@lists.linux.dev \
--cc=joro@8bytes.org \
--cc=kvmarm@lists.linux.dev \
--cc=linaro-mm-sig@lists.linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-coco@lists.linux.dev \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=m.szyprowski@samsung.com \
--cc=maz@kernel.org \
--cc=robin.murphy@arm.com \
--cc=steven.price@arm.com \
--cc=sumit.semwal@linaro.org \
--cc=suzuki.poulose@arm.com \
--cc=tglx@kernel.org \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®