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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777323977; bh=CIswUHjtV6oSUsxjeWT06cacL6KEcFHO+pUSNAd7kso=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=YoNJN0KKRc41UjoNkjKTVxHCQ9uHmb1vXRgaeoA4tQWz/iAKTXe43aboUj7ZhDG0t grNENZpJKNHzFBJy7Y506+AuuCHjO1qZfDRXYgBS/0Yw8y5dlIOWegmRBKPba4bB6Y 5VcibMz6TPsiqAgZkvXp2IBx61Yw3YfO9M4cAandeRfDj83rXbzcmH2WqXx6KVwMY1 tFRBliyM+9VjS8JW20gNO4qb1z7tkpfpIBwBl3Wh8cGH9NaUQh2VAbsD4l95ckOfFr 7cMHIO7JOZkCSv8VfoEMbGIMwpAhmicK4vHq6YczTKvrrB2AuD0Nao69SvIM0v/DRr xVcZfTO9P4O2Q== Date: Mon, 27 Apr 2026 16:06:15 -0500 From: Bjorn Helgaas To: David Matlack Cc: iommu@lists.linux.dev, kexec@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, Adithya Jayachandran , Alexander Graf , Alex Williamson , Bjorn Helgaas , Chris Li , David Rientjes , Jacob Pan , Jason Gunthorpe , Joerg Roedel , Jonathan Corbet , Josh Hilke , Leon Romanovsky , Lukas Wunner , Mike Rapoport , Parav Pandit , Pasha Tatashin , Pranjal Shrivastava , Pratyush Yadav , Robin Murphy , Saeed Mahameed , Samiullah Khawaja , Shuah Khan , Will Deacon , William Tu , Yi Liu Subject: Re: [PATCH v4 02/11] PCI: liveupdate: Track outgoing preserved PCI devices Message-ID: <20260427210615.GA186434@bhelgaas> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260423212316.3431746-3-dmatlack@google.com> X-Stat-Signature: dmt7tbf1e8mj4mc5twjoggx7r8qbakk9 X-Rspam-User: X-Rspamd-Queue-Id: CD7FAC0002 X-Rspamd-Server: rspam07 X-HE-Tag: 1777323977-836466 X-HE-Meta: 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 bFQSP+Di aVB9Ep7oY1CeRNBFllTHbZiFDzxykAJuuk39Wzut7516yjqEFiuxP9raCtZ5W6VxVVtAO8Wfk3O/UwTepxvvHUUbPVJvVecfHtg05Z6BOcXWofrIfEpXmDP8uJ0M7hJrzXTL6+4+GqTEU+N1jelbsc6V/EzCtw6S+ShN26p1fExUUGH1GWAPEand+Vrp466bShWEMx8Fux+6iGDH2/guXHoGUetw3dAzCcIGzQR1hbihCdjoegzOyN+kGtVoTGfLROjMX Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Apr 23, 2026 at 09:23:06PM +0000, David Matlack wrote: > Add APIs to allow drivers to notify the PCI core of which devices are > being preserved across a Live Update for the next kernel, i.e. > "outgoing" devices. > +++ b/drivers/pci/liveupdate.c > @@ -43,6 +43,26 @@ > * > * * ``pci_liveupdate_register_flb(driver_file_handler)`` > * * ``pci_liveupdate_unregister_flb(driver_file_handler)`` > + * > + * Device Tracking > + * =============== > + * > + * Drivers must notify the PCI core when specific devices are preserved or > + * unpreserved with the following APIs: > + * > + * * ``pci_liveupdate_preserve(pci_dev)`` > + * * ``pci_liveupdate_unpreserve(pci_dev)`` > + * > + * This allows the PCI core to keep it's FLB data (struct pci_ser) up to date > + * with the list of **outgoing** preserved devices for the next kernel. s/it's/its/