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bh=w7UD7eSyvrXOIrllYklZM3dLeVEFhv6ODTbpyDAXw/g=; b=WaB5KEnheQmrkwwZ8TzNYAuDCiqCkdgEKC2ig5K86hf3WOMrQBSc4JgJp2Rko27iZDcOqO qWgaoBfc4k2auYGsuoRCVTXHDEX7staVZV/WtAvQLCw+W6PPjebDS/9c4mIndphPBdEYEB /7kt3zZCPEuHhdogjLlbYSicoo7pNEA= ARC-Authentication-Results: i=1; imf04.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf04.hostedemail.com: domain of riel@shelob.surriel.com designates 96.67.55.147 as permitted sender) smtp.mailfrom=riel@shelob.surriel.com Received: from fangorn.home.surriel.com ([10.0.13.7]) by shelob.surriel.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.97.1) (envelope-from ) id 1uC6K6-000000000IF-3CQ2; Mon, 05 May 2025 20:38:14 -0400 From: Rik van Riel To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, x86@kernel.org, kernel-team@meta.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, Yu-cheng Yu , Rik van Riel Subject: [RFC PATCH 1/9] x86/mm: Introduce MSR_IA32_CORE_CAPABILITIES Date: Mon, 5 May 2025 20:37:39 -0400 Message-ID: <20250506003811.92405-2-riel@surriel.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250506003811.92405-1-riel@surriel.com> References: <20250506003811.92405-1-riel@surriel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 870204000D X-Stat-Signature: kqrfh9jbj4qbhipw8dyuqqyhob45k65c X-Rspam-User: X-HE-Tag: 1746491907-611595 X-HE-Meta: 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 EWE3hRSF MBHXVaWdNGhWI/ymEO+Sl+QhP9zAFclpdC+3lttpYdNtbFFI+W5g9wQWv2x5OGI91ohSxU+1flqtvgVutuUg7XTXrPw/gICdVfLXGWIyZOu0uBMc4bVfJ1gdF2pSeu8JTA+PLzULKLj6WdSilULufIc2/D77ivIloPG0vNA4gWPyxJZEvhzgw62hj8ynSvu54zttzNxoLb0sh/I1ftg49BnQ79BNYf7mPeK22JWNibkjoYivN3LMaIwk/FOvQWMyv2OGFNmHH+U+1p4czJouHxc5W4tOYy4JvOs+OgP13kkHWXHxVHA03WD7tBHvdkaF9GC4QAtapxeLszrREr5tYdHIT/pJmD3j9qOtF+ivi+s7Oplz/VHu9cCrChCuyZimRrVbW X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Yu-cheng Yu MSR_IA32_CORE_CAPABILITIES indicates the existence of other MSRs. Bit[1] indicates Remote Action Request (RAR) TLB registers. Signed-off-by: Yu-cheng Yu Signed-off-by: Rik van Riel --- arch/x86/include/asm/msr-index.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index ac21dc19dde2..0828b891fe2e 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -212,6 +212,12 @@ * File. */ +#define MSR_IA32_CORE_CAPABILITIES 0x000000cf +#define CORE_CAP_RAR BIT(1) /* + * Remote Action Request. Used to directly + * flush the TLB on remote CPUs. + */ + #define MSR_IA32_FLUSH_CMD 0x0000010b #define L1D_FLUSH BIT(0) /* * Writeback and invalidate the -- 2.49.0