From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF01D2652B4 for ; Wed, 2 Jul 2025 11:16:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751454982; cv=none; b=bZ7pbIzmZVGHS8YtVeuNj5M5N/cL0ui8KyZ9P+z/vicxDRhvH5wmeWdAuCH70ZzNyVuQW1QXieKgF9a8c4R5SbTdjL7ZlOZLmaFoCzrasemErG+5bW+lAxFSp3Czy0icl5dmrdiUcgxDVNyvq8r6WgSOX3l+vm7yQjBBJ1C/mrM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751454982; c=relaxed/simple; bh=WLv6kMUNDvp/npyieXA0KsxaoL75iDkMGxmkeaZEDxI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=hZgxio6z5PDyh3ZAgsIExnXrFvxMcs+eghwJfxD5fpNQM/9uS1xNBcSWn++rD3jPsMmdHU/bXXlM7iUQKcgtsVHPL/1gWCIKAHfmdH9jJQno9NzWbrp56JYxdS86bpLHgl4fNCRjYxI8Dr8Vx4hr9xtZZmLtAeTeAeYpKuTn5hU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=igw5TDlM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="igw5TDlM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0B84FC4CEED; Wed, 2 Jul 2025 11:16:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1751454982; bh=WLv6kMUNDvp/npyieXA0KsxaoL75iDkMGxmkeaZEDxI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=igw5TDlMuxL/IqSJWZQ26IZUTkyWBFkDpgsvTdtU0mIXalHQ6on7V+MIb9ZziMuk5 PE+M1wwvJpCyeWKclIXQCj7N342u0nMBZ1A/g4OoFaFzqbAwSLA2/fRNla/PtTyA8l hdkvKi6jGpkR8yo78iQTNRrQv5wIzNY2xaVOciFq5qf/Szq/95Fo4NWoPYQxMNJWOj YL6/xUVps3EfwODVV0hcxo5fWEjLFMfW+woeBYvwDhs9np5ontek5Nbj5yR2EUm0KP lNf+UBvGS73Wv1QmBhAvwfwPVO4YlOognn+bZ7Y4ajwb4sA7V3Y2O/lLepxczLosqr xocSD4R/uRooA== Date: Wed, 2 Jul 2025 12:16:16 +0100 From: Mark Brown To: kan.liang@linux.intel.com Cc: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, tglx@linutronix.de, dave.hansen@linux.intel.com, irogers@google.com, adrian.hunter@intel.com, jolsa@kernel.org, alexander.shishkin@linux.intel.com, linux-kernel@vger.kernel.org, dapeng1.mi@linux.intel.com, ak@linux.intel.com, zide.chen@intel.com, mark.rutland@arm.com, ravi.bangoria@amd.com Subject: Re: [RFC PATCH V2 06/13] perf: Support SIMD registers Message-ID: <69afb239-da54-452d-8ab4-2d80dbdf8dce@sirena.org.uk> References: <20250626195610.405379-1-kan.liang@linux.intel.com> <20250626195610.405379-7-kan.liang@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="PqM+omoIMPGPGl7I" Content-Disposition: inline In-Reply-To: <20250626195610.405379-7-kan.liang@linux.intel.com> X-Cookie: You should go home. --PqM+omoIMPGPGl7I Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, Jun 26, 2025 at 12:56:03PM -0700, kan.liang@linux.intel.com wrote: > * { u64 abi; # enum perf_sample_regs_abi > - * u64 regs[weight(mask)]; } && PERF_SAMPLE_REGS_USER > + * u64 regs[weight(mask)]; > + * struct { > + * u16 nr_vectors; > + * u16 vector_qwords; > + * u16 nr_pred; > + * u16 pred_qwords; > + * u64 data[nr_vectors * vector_qwords + nr_pred * pred_qwords]; > + * } && (abi & PERF_SAMPLE_REGS_ABI_SIMD) > + * } && PERF_SAMPLE_REGS_USER I'm not super familiar with perf but I think this should work for arm64, it supplies the vector length through the _qwords and we can handle FFR being optional by varying the number of predicate registers. --PqM+omoIMPGPGl7I Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmhlFP8ACgkQJNaLcl1U h9DGFQf/R5EGZ7vANuZCxohUindvxCaxIvxhOPVb9yu3A/75ATNrRK27Z4nqpooi q5sfss5jo52540RFXz3J54jfId952YxC0yZMLGPhBFualjzstMCEiyjLzBe86MAi 1jKoU1gTdZI2iBpaVvT8bWKg80QnC/vqt0h7qbtxPCWGCuCNjMwsikWSkj60maYO QF8TtrZQeQpyqprCVNW0kkzGT8kSV51oWohEQfg4S4HbfXmZKBD6y3CjMnDi9R28 aLcFA++/HYAFbvxx59aJEyBvkJfVi7tkxyjefs3kQQ69BDYmd0lmSGf07m2Aq7ba XZ4ULQjOSC6gkzAg5p5jzmTZ3PJ0xQ== =Tr1S -----END PGP SIGNATURE----- --PqM+omoIMPGPGl7I--