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 30AC713D888; Thu, 27 Jun 2024 10:54:21 +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=1719485662; cv=none; b=NDwKb2oEAOjMdWRUlQDZNlOz42uQATcUzh/ecoiVuGOYDtnbUKeOSBWEivLHT1UZAe3K8bizKqKDxbYLIaL+jYBeNAk9gxNjan1j4KPC4QuAaF3bhNbaNVbBktZzHy74bMlPYn90uNOTnddbuhej/0UHo8xT2DOwSCsLF8UkjjE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719485662; c=relaxed/simple; bh=+VUe2Wa8SKE7wFSRDeywu7uI2jNt/A1olYtxZ+S+j7k=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=p4KJlYDnyx1+AOCI3/d1IP4amI7bEGykq96hUXZ5+aBjs4QOdBTd78WS2KcmJAIAuDF/l/MUBg+5OmRh6GtCWZAkJ6dDdvsU9OpVPTBcm29Hx9acAkrTf/zbYrm2TLSIJSq+pKosaZUKbdY8ZT9F282YHf8CEdp7Ojie4Nm6RWA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QIwDX/NW; 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="QIwDX/NW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 992B7C2BBFC; Thu, 27 Jun 2024 10:54:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719485661; bh=+VUe2Wa8SKE7wFSRDeywu7uI2jNt/A1olYtxZ+S+j7k=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=QIwDX/NWLGHl6ChidC2hBQ6FY7nFCM1ZWVZUP4PWuWckgVsjIpnmCv7nAheI6HE0F rgrPdV+fqVQmGVkqL8exY4V7vuk+8aRj+CeRlew1fIrFS76w7xQ3NY5DSdijz0f93m 2Jb/bo9YFrgaRXtapsYhY/uNBFG4vCaMmJDmhnrp/+72fLp9uqenmi2W2GyZUW/gbQ YDCJoRtFcTImef3P71EbG2iFwYfFD5qi9JJfdU5mcWVo5Xq0AgZm/zxK8wBFphb/fC R97l0vNtyUhY4nDTqUeFv5FXiPBUbnDtwzBCX7/JIAFC27lseefxcZUtIOnrKx3nNk HGH2gBvyf8jyg== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1sMmlf-007lyJ-Fx; Thu, 27 Jun 2024 11:54:19 +0100 Date: Thu, 27 Jun 2024 11:54:18 +0100 Message-ID: <86jziairl1.wl-maz@kernel.org> From: Marc Zyngier To: "Rob Herring (Arm)" Cc: Russell King , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Will Deacon , Oliver Upton , James Morse , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , James Clark , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, kvmarm@lists.linux.dev Subject: Re: [PATCH v2 11/12] KVM: arm64: Refine PMU defines for number of counters In-Reply-To: <20240626-arm-pmu-3-9-icntr-v2-11-c9784b4f4065@kernel.org> References: <20240626-arm-pmu-3-9-icntr-v2-0-c9784b4f4065@kernel.org> <20240626-arm-pmu-3-9-icntr-v2-11-c9784b4f4065@kernel.org> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/29.2 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: robh@kernel.org, linux@armlinux.org.uk, peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com, will@kernel.org, oliver.upton@linux.dev, james.morse@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, james.clark@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, kvmarm@lists.linux.dev X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Wed, 26 Jun 2024 23:32:35 +0100, "Rob Herring (Arm)" wrote: > > There are 2 defines for the number of PMU counters: > ARMV8_PMU_MAX_COUNTERS and ARMPMU_MAX_HWEVENTS. Both are the same > currently, but Armv9.4/8.9 increases the number of possible counters > from 32 to 33. With this change, the maximum number of counters will > differ for KVM's PMU emulation which is PMUv3.4. Give KVM PMU emulation > its own define to decouple it from the rest of the kernel's number PMU > counters. > > The VHE PMU code needs to match the PMU driver, so switch it to use > ARMPMU_MAX_HWEVENTS instead. > > Acked-by: Mark Rutland > Signed-off-by: Rob Herring (Arm) Reviewed-by: Marc Zyngier M. -- Without deviation from the norm, progress is not possible.