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From: Maxim Levitsky <mlevitsk@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: "Chang S. Bae" <chang.seok.bae@intel.com>,
	Jiri Olsa <jolsa@kernel.org>,
	linux-perf-users@vger.kernel.org,
	Peter Zijlstra <peterz@infradead.org>,
	"H. Peter Anvin" <hpa@zytor.com>,
	"David S. Miller" <davem@davemloft.net>,
	Borislav Petkov <bp@alien8.de>, Kees Cook <keescook@chromium.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Namhyung Kim <namhyung@kernel.org>,
	Tim Chen <tim.c.chen@linux.intel.com>,
	Maxim Levitsky <mlevitsk@redhat.com>,
	Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
	Jane Malalane <jane.malalane@citrix.com>,
	Tony Luck <tony.luck@intel.com>, Ingo Molnar <mingo@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	linux-crypto@vger.kernel.org (open list:CRYPTO API),
	Paolo Bonzini <pbonzini@redhat.com>
Subject: [PATCH 1/4] perf/x86/intel/lbr: use setup_clear_cpu_cap instead of clear_cpu_cap
Date: Wed, 22 Jun 2022 17:48:17 +0300	[thread overview]
Message-ID: <20220622144820.751402-2-mlevitsk@redhat.com> (raw)
In-Reply-To: <20220622144820.751402-1-mlevitsk@redhat.com>

clear_cpu_cap(&boot_cpu_data) is very similar to setup_clear_cpu_cap
except that the latter also sets a bit in 'cpu_caps_cleared' which
later clears the same cap in secondary cpus, which is likely
what is meant here.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
---
 arch/x86/events/intel/lbr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/events/intel/lbr.c b/arch/x86/events/intel/lbr.c
index 13179f31fe10fa..b08715172309a7 100644
--- a/arch/x86/events/intel/lbr.c
+++ b/arch/x86/events/intel/lbr.c
@@ -1860,7 +1860,7 @@ void __init intel_pmu_arch_lbr_init(void)
 	return;
 
 clear_arch_lbr:
-	clear_cpu_cap(&boot_cpu_data, X86_FEATURE_ARCH_LBR);
+	setup_clear_cpu_cap(X86_FEATURE_ARCH_LBR);
 }
 
 /**
-- 
2.26.3


  reply	other threads:[~2022-06-22 14:49 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-22 14:48 [PATCH 0/4] x86: cpuid: improve support for broken CPUID configurations Maxim Levitsky
2022-06-22 14:48 ` Maxim Levitsky [this message]
2022-06-22 14:58   ` [PATCH 1/4] perf/x86/intel/lbr: use setup_clear_cpu_cap instead of clear_cpu_cap Dave Hansen
2022-06-22 18:57     ` Liang, Kan
2022-06-22 19:32       ` Liang, Kan
2022-06-22 14:48 ` [PATCH 2/4] x86/cpuid: refactor setup_clear_cpu_cap/clear_feature Maxim Levitsky
2022-06-22 15:07   ` Dave Hansen
2022-06-22 15:59     ` Maxim Levitsky
2022-06-22 14:48 ` [PATCH 3/4] x86/cpuid: move filter_cpuid_features to cpuid-deps.c Maxim Levitsky
2022-06-22 15:07   ` Dave Hansen
2022-06-22 16:01     ` Maxim Levitsky
2022-06-22 14:48 ` [PATCH 4/4] x86/cpuid: check for dependencies violations in CPUID and attempt to fix them Maxim Levitsky
2022-06-22 15:32   ` Dave Hansen
2022-06-22 17:09     ` Maxim Levitsky
2022-06-22 17:18       ` Dave Hansen

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