From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: Subject: Re: [PATCH v3] efifb: avoid reconfiguration of BAR that covers the framebuffer To: Lukas Wunner , Ard Biesheuvel References: <1490196629-28088-1-git-send-email-ard.biesheuvel@linaro.org> <20170322193111.GA8190@wunner.de> From: Sinan Kaya Message-ID: <31da6db5-be22-9e84-5e76-67c519bc0b34@codeaurora.org> Date: Wed, 22 Mar 2017 15:36:49 -0400 MIME-Version: 1.0 In-Reply-To: <20170322193111.GA8190@wunner.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lorenzo.pieralisi@arm.com, matt@codeblueprint.co.uk, linux-pci@vger.kernel.org, pjones@redhat.com, heyi.guo@linaro.org, linux-efi@vger.kernel.org, hanjun.guo@linaro.org, bhelgaas@google.com, yinghai@kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+bjorn=helgaas.com@lists.infradead.org List-ID: On 3/22/2017 3:31 PM, Lukas Wunner wrote: > On arm64 PCI systems, the entire PCI hierarchy is reconfigured from > scratch at boot. This may result in the GOP framebuffer address to > become stale, if the BAR covering the framebuffer is modified. Does this code still work with the case where resources are not reassigned on ARM64? As far as I know, kernel honors resource assignments done by the UEFI BIOS if they are correct. Kernel will reassign the resources only if something is wrong. Will this code break other platforms/architectures? -- Sinan Kaya Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel