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[91.219.240.17]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47d193cbc0bsm195443905e9.11.2025.12.22.07.18.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Dec 2025 07:18:22 -0800 (PST) From: Vitaly Kuznetsov To: "Jason A. Donenfeld" Cc: Theodore Ts'o , Ingo Molnar , Kiryl Shutsemau , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Pradipta Banerjee , Frank Liang , Alexander Graf Subject: Re: [PATCH] vmgenid: Remap memory as decrypted In-Reply-To: References: <20251222144646.1426256-1-vkuznets@redhat.com> Date: Mon, 22 Dec 2025 16:18:20 +0100 Message-ID: <87jyye35qb.fsf@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: AeWMDGBXLJ29TGpY5KNf_ohQFnlJL80gTawrCyG-Ils_1766416703 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 06EB880017 X-Stat-Signature: 5zufpk5t7e9tmz8pea31fptqw6dp74gg X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1766416705-224714 X-HE-Meta: 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 8TufsQEz fNmWWXBLGjiETVCmMAUR8e/bdwuGv6q2G7DFhly4aJS4muEbnnpPknGO8spJByIqay5SdQLBYEJlGlMsCp5f6SQm/L3uq05WiyhyvuYsxmMH6S6aurTdGAVNMdmoRCDlN/Bv4BvJHsyBB3h0WmVH+SXbwgY9PLc0WHKEV/GKXibcbI96xq23GPsB9zGelApIdCDuM/KF9qcRT9iWj/Tvzrc76iOqnSVaDwvcEEdrlaViN02HxySvyyZt5EqyemXL3sMBn+sApY6K2y/TeXQrWvAO1PVtjbz2VVqsaaAswgrW7n7hRgwWoS2M6GLDpwTdcA+Q9S0c3X47KpK+4ZB+7z17Jl2D+DtjNeZNvQySGQNDYwY+iHCf6gJWhPq8Ij37urcTv9j8UjPdJ+0EADfAk/Zr8DPWLe7zu8ezUCsR0qCN47PxjMHR/dp2bQPWJOLCL6qJctPpZwvFhYpe3WS7dDmJ+SKE1z58Q/mzqAXwT/EgKcsU= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: "Jason A. Donenfeld" writes: > Hi Vitaly, > > On Mon, Dec 22, 2025 at 3:46=E2=80=AFPM Vitaly Kuznetsov wrote: >> - virt_addr =3D devm_memremap(&device->dev, phys_addr, VMGENID_SIZ= E, MEMREMAP_WB); >> + virt_addr =3D devm_memremap(&device->dev, phys_addr, VMGENID_SIZ= E, >> + MEMREMAP_WB | MEMREMAP_DEC); > > Thanks for this patch. I still need to do a bit of my own testing with > it, but I've preliminarily applied it to the random.git tree: > https://git.kernel.org/pub/scm/linux/kernel/git/crng/random.git/commit/?i= d=3D9476583268980ce64ed75f124768fe3bff6fff4c > > Should this patch CC stable@, by the way? > I'm not sure how common the configuration (SEV-SNP/(TDX?) + vmgenid) is but I guess AWS SEV-SNP config is significant enough to justify stable@ as all kernels 6.15+ don't boot there at all. --=20 Vitaly