From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 4FDFE263F39 for ; Tue, 20 May 2025 10:07:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747735629; cv=none; b=B5FjzOjdC9gFOcngJGwKtmBaq+kOLnhaTxDhTD3osf9Ux0/d6JUq4T8HgoV0VKskaBuqJTH/kNA0Sp9XoU/G0MnYx72VclcFckUc0d8t7/6I7IXWoB0j9yeYDTTnjvO9ty0dDtDvnTtX0vUEj1nJWdcBtMYKN4w7TeXEdp5Glpc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747735629; c=relaxed/simple; bh=p7ppXvUJEITrZqv5fOiuolGqKTskwl2XcxcfZt4xih8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=KzOMoC2VwIN0ALRCjfV+tY5bEU4om5VQ2xOzUF2mS2BvTsG2kzMHi/g0nV+lhG1x4Zwk8tcHztNadHQw4Moe5TVn1A4YXOgNueH5xqkK/ZjKe4GSx/5RCZf5fGSVaDWU4gPF5bBUDHY5eImCope6s7QZ27Q1ec+J6EDYEcQ8wXA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 0354E1BC0; Tue, 20 May 2025 03:06:52 -0700 (PDT) Received: from localhost (e132581.arm.com [10.1.196.87]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0246C3F6A8; Tue, 20 May 2025 03:07:05 -0700 (PDT) Date: Tue, 20 May 2025 11:07:01 +0100 From: Leo Yan To: James Clark Cc: Catalin Marinas , Will Deacon , Mark Rutland , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Jonathan Corbet , Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev Subject: Re: [PATCH 02/10] perf: arm_spe: Support FEAT_SPEv1p4 filters Message-ID: <20250520100701.GL412060@e132581.arm.com> References: <20250506-james-perf-feat_spe_eft-v1-0-dd480e8e4851@linaro.org> <20250506-james-perf-feat_spe_eft-v1-2-dd480e8e4851@linaro.org> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250506-james-perf-feat_spe_eft-v1-2-dd480e8e4851@linaro.org> On Tue, May 06, 2025 at 12:41:34PM +0100, James Clark wrote: > FEAT_SPEv1p4 (optional from Armv8.8) adds some new filter bits, so > remove them from the previous version's RES0 bits using > PMSEVFR_EL1_RES0_V1P4_EXCL. It also makes some previously available bits > unavailable again, so add those back using PMSEVFR_EL1_RES0_V1P4_INCL. > E.g: > > E[30], bit [30] > When FEAT_SPEv1p4 is _not_ implemented ... Yes, that's the case. I reviewed the bits below one by one, and they all look correct to me. > FEAT_SPE_V1P3 has the same filters as V1P2 so explicitly add it to the > switch. > > Signed-off-by: James Clark Reviewed-by: Leo Yan > --- > arch/arm64/include/asm/sysreg.h | 7 +++++++ > drivers/perf/arm_spe_pmu.c | 5 ++++- > 2 files changed, 11 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h > index 2639d3633073..e24042e914a4 100644 > --- a/arch/arm64/include/asm/sysreg.h > +++ b/arch/arm64/include/asm/sysreg.h > @@ -354,6 +354,13 @@ > (PMSEVFR_EL1_RES0_IMP & ~(BIT_ULL(18) | BIT_ULL(17) | BIT_ULL(11))) > #define PMSEVFR_EL1_RES0_V1P2 \ > (PMSEVFR_EL1_RES0_V1P1 & ~BIT_ULL(6)) > +#define PMSEVFR_EL1_RES0_V1P4_EXCL \ > + (BIT_ULL(2) | BIT_ULL(4) | GENMASK_ULL(10, 8) | GENMASK_ULL(23, 19)) > +#define PMSEVFR_EL1_RES0_V1P4_INCL \ > + (GENMASK_ULL(31, 26)) > +#define PMSEVFR_EL1_RES0_V1P4 \ > + (PMSEVFR_EL1_RES0_V1P4_INCL | \ > + (PMSEVFR_EL1_RES0_V1P2 & ~PMSEVFR_EL1_RES0_V1P4_EXCL)) > > /* Buffer error reporting */ > #define PMBSR_EL1_FAULT_FSC_SHIFT PMBSR_EL1_MSS_SHIFT > diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c > index 3efed8839a4e..d9f6d229dce8 100644 > --- a/drivers/perf/arm_spe_pmu.c > +++ b/drivers/perf/arm_spe_pmu.c > @@ -701,9 +701,12 @@ static u64 arm_spe_pmsevfr_res0(u16 pmsver) > case ID_AA64DFR0_EL1_PMSVer_V1P1: > return PMSEVFR_EL1_RES0_V1P1; > case ID_AA64DFR0_EL1_PMSVer_V1P2: > + case ID_AA64DFR0_EL1_PMSVer_V1P3: > + return PMSEVFR_EL1_RES0_V1P2; > + case ID_AA64DFR0_EL1_PMSVer_V1P4: > /* Return the highest version we support in default */ > default: > - return PMSEVFR_EL1_RES0_V1P2; > + return PMSEVFR_EL1_RES0_V1P4; > } > } > > > -- > 2.34.1 >