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 1F143611B for ; Sun, 28 May 2023 19:48:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A2F1FC433EF; Sun, 28 May 2023 19:48:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1685303310; bh=gZFETnFHl7/ZN+F/cEAiMCBw5P7IPLetL1193hYjaaQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n74AOCpIdTPfvOpaCCf9LBXYVUFVWMblAvsN8e2kNvGvcS0v9b5tcdmnDj4ZA66ea aU9cv0hj1bmYeoiRlb1v4dQElWSmJ7r6kDYW5W1JAiZkWTKulVCG9HsvXVt8DfzAm9 sdYw2tfZZZwI5bu08plruYsa3FIfh1IYzLDfVoz8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stephane Eranian , Kan Liang , "Peter Zijlstra (Intel)" Subject: [PATCH 5.15 26/69] perf/x86/uncore: Correct the number of CHAs on SPR Date: Sun, 28 May 2023 20:11:46 +0100 Message-Id: <20230528190829.350199238@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230528190828.358612414@linuxfoundation.org> References: <20230528190828.358612414@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Kan Liang commit 38776cc45eb7603df4735a0410f42cffff8e71a1 upstream. The number of CHAs from the discovery table on some SPR variants is incorrect, because of a firmware issue. An accurate number can be read from the MSR UNC_CBO_CONFIG. Fixes: 949b11381f81 ("perf/x86/intel/uncore: Add Sapphire Rapids server CHA support") Reported-by: Stephane Eranian Signed-off-by: Kan Liang Signed-off-by: Peter Zijlstra (Intel) Tested-by: Stephane Eranian Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20230508140206.283708-1-kan.liang@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- arch/x86/events/intel/uncore_snbep.c | 11 +++++++++++ 1 file changed, 11 insertions(+) --- a/arch/x86/events/intel/uncore_snbep.c +++ b/arch/x86/events/intel/uncore_snbep.c @@ -5822,6 +5822,7 @@ static struct intel_uncore_type spr_unco }; #define UNCORE_SPR_NUM_UNCORE_TYPES 12 +#define UNCORE_SPR_CHA 0 #define UNCORE_SPR_IIO 1 #define UNCORE_SPR_IMC 6 @@ -6064,12 +6065,22 @@ static int uncore_type_max_boxes(struct return max + 1; } +#define SPR_MSR_UNC_CBO_CONFIG 0x2FFE + void spr_uncore_cpu_init(void) { + struct intel_uncore_type *type; + u64 num_cbo; + uncore_msr_uncores = uncore_get_uncores(UNCORE_ACCESS_MSR, UNCORE_SPR_MSR_EXTRA_UNCORES, spr_msr_uncores); + type = uncore_find_type_by_id(uncore_msr_uncores, UNCORE_SPR_CHA); + if (type) { + rdmsrl(SPR_MSR_UNC_CBO_CONFIG, num_cbo); + type->num_boxes = num_cbo; + } spr_uncore_iio_free_running.num_boxes = uncore_type_max_boxes(uncore_msr_uncores, UNCORE_SPR_IIO); }