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Wed, 10 Sep 2025 16:39:15 -0700 (PDT) Received: from localhost ([2804:14d:7e39:88d6:e23e:713e:98d0:a6b4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-25a27425dc1sm39111925ad.20.2025.09.10.16.39.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Sep 2025 16:39:14 -0700 (PDT) From: Thiago Jung Bauermann To: Cc: , Subject: Re: [RFC PATCH 0/5] gdb/aarch64: Support for FPMR In-Reply-To: <20250905131707.77027-1-Ezra.Sitorus@arm.com> (Ezra Sitorus's message of "Fri, 5 Sep 2025 14:17:02 +0100") References: <20250905131707.77027-1-Ezra.Sitorus@arm.com> User-Agent: mu4e 1.12.11; emacs 30.1 Date: Wed, 10 Sep 2025 20:39:12 -0300 Message-ID: <874it96fof.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-patches-bounces~public-inbox=simark.ca@sourceware.org Hello Ezra, Thank you for these patches. writes: > From: Ezra Sitorus > > The Floating Point Mode Register (FPMR) determines the behaviour of FP8 > instructions. This patch series adds support for this register into gdb. > > This has been tested using Shrinkwrap, which allows me to run Linux on a > model of an Arm system with new features. You can find more information > here: [1]. Is there something specific one has to do to enable FPMR on Shrinkwrap/FVP? I tried building an Armv9.5 configuration: $ shrinkwrap build --overlay=arch/v9.5.yaml ns-edk2.yaml and then running it with upstream kernel v6.16-rc7 which I think should support FPMR, but AT_HWCAP doesn't have the FPMR bit set, and the test program from the allow_aarch64_fpmr_tests procedure gets a SIGILL so the testcases in this series report unsupported. -- Thiago