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Fri, 21 Aug 2026 07:51:35 -0400 (EDT) Date: Fri, 21 Aug 2026 12:51:34 +0100 From: Kiryl Shutsemau To: Breno Leitao Cc: Ard Biesheuvel , Ilias Apalodimas , Miaohe Lin , Naoya Horiguchi , Andrew Morton , linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, rmikey@meta.com, riel@surriel.com, kexec@lists.infradead.org, kernel-team@meta.com Subject: Re: [PATCH v2 2/6] efi: add the LINUX_EFI_POISONED_MEMORY configuration table Message-ID: References: <20260821-hwpoison-kho-v2-0-5743791e48e6@debian.org> <20260821-hwpoison-kho-v2-2-5743791e48e6@debian.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260821-hwpoison-kho-v2-2-5743791e48e6@debian.org> X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org On Fri, Aug 21, 2026 at 03:06:02AM -0700, Breno Leitao wrote: > diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig > index 29e0729299f5b..69c0dc02bc112 100644 > --- a/drivers/firmware/efi/Kconfig > +++ b/drivers/firmware/efi/Kconfig > @@ -263,6 +263,16 @@ config EFI_COCO_SECRET > virt/coco/efi_secret module to access the secrets, which in turn > allows userspace programs to access the injected secrets. > > +config EFI_POISONED_MEMORY > + bool "Carry hardware-poisoned pages across kexec" > + depends on EFI_STUB && MEMORY_FAILURE && 64BIT > + help > + Record page frames that are hardware-poisoned while this kernel runs > + into an EFI configuration table, and honor that table early on the > + next kernel so a kexec does not hand known-bad RAM back out. > + > + If unsure, say N. > + Do we want to make it conditional? Maybe just for everyone with EFI_STUB && MEMORY_FAILURE? Where 64BIT limitation comes from? -- Kiryl Shutsemau / Kirill A. Shutemov