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d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=Y2hXItZjjCaHUsRFHN4zJB0I8rURzaLXg1N8P/pLEZA=; b=E1MM8R8QAB0a U5cy93CxiOkrmlXvSKl20VgvMeUQbSqVRakvIYQWwegZl2R1hc7c7Rvh88dTrshgY13IF7H1rtSw7 7XDNMjqEqItAR4VSSuAtfY9YfqzKT/11eBQ9a2f432aPaVhwH73efpIMFcYi5Xqk/nZMkLGMOT91l WMN0dyEi59pqL9vRufgFlJVlgSESyj6E458UnimvKYknzcVsBKFZmT0rR/xsqRx7oTbRCjsojhrqE FnrK3G7A40MyIszMw16RvKiU20enaw8iQ8pFd5KKNLXYp5RJHosHeCnFhKJhnyk1OiwKwsQm5Qe4i zDcGrcze32VZy36B40NpHA==; Date: Fri, 30 Jan 2026 13:37:04 +0200 Message-Id: <86zf5v8h7j.fsf@gnu.org> From: Eli Zaretskii To: Peter Maydell Cc: gdb-patches@sourceware.org, thiago.bauermann@linaro.org, luis.machado.foss@gmail.com, manos.pitsidianakis@linaro.org In-Reply-To: <20260129181122.1426596-1-peter.maydell@linaro.org> (message from Peter Maydell on Thu, 29 Jan 2026 18:11:21 +0000) Subject: Re: [PATCH] docs: Clarify gdb remote protocol AArch64 SVE and SME handling References: <20260129181122.1426596-1-peter.maydell@linaro.org> 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 > From: Peter Maydell > Cc: Thiago Jung Bauermann , > Luis , > Manos Pitsidianakis > Date: Thu, 29 Jan 2026 18:11:21 +0000 > > The documentation of the AArch64 target features for the gdb remote > protocol has some areas where it is unclear about SVE and SME: > > * it doesn't say what to do if the target has only SME > > * it isn't clear about what the org.gnu.gdb.aarch64.sve vector > register size should be when both SME and SVE are present > > Clarify/correct the documentation: > > * org.gnu.gdb.aarch64.sve is effectively "the feature for the z > vector registers", and must be provided even when the target only > implements SME (because the z registers exist in an SME only CPU) > > * the z register size and the 'vg' pseudoregister in > org.gnu.gdb.aarch64.sve follow the architectural "effective SVE > vector length", which might be either the non-streaming SVE vector > length or the streaming SVE vector length > > Reviewed-by: Thiago Jung Bauermann > --- > gdb/doc/gdb.texinfo | 18 +++++++++++++++++- > 1 file changed, 17 insertions(+), 1 deletion(-) Thanks. > +@samp{vg} represents the size of the @samp{z} registers, and is what > +the Arm architecture defines as the ``Effective SVE vector length''. That I suggest to put the terminology you mention in @dfn instead of quoting it. It will be formatted as a quoted string in Info, but will look much prettier in HTML and PDF formats. Also, please leave two spaces between sentences, here and elsewhere in the patch. Reviewed-By: Eli Zaretskii