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d=hostedemail.com; s=arc-20220608; t=1746491907; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=vClgMDM+44bGLMUdAYw4z1oYiZAW5C+TVp8/JzpF09c=; b=iWi/g2nBFvqRsqOdkjTc/fZht5ug59Zx8Zgmrfo4SOC76yVIscINkP2I7ubRA9LAB7YT0j wjT26PtxSM58eLDnFvE9w4utRkcI7B0umuhaazaIqEqFdFzXnIqJ+Z7hzAKAzbywOB2jyf 5VVbpKtMZpIoDbT9E5i+E2s9HlZFKKY= 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-3INh; 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 2/9] x86/mm: Introduce Remote Action Request MSRs Date: Mon, 5 May 2025 20:37:40 -0400 Message-ID: <20250506003811.92405-3-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-Rspam-User: X-Rspamd-Queue-Id: 943E2180011 X-Rspamd-Server: rspam04 X-Stat-Signature: xiw45mhy3axmnsktwde4trd1ni94eeby X-HE-Tag: 1746491907-67169 X-HE-Meta: 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 guq87Bre Hl7dxaNdXTkOuH5C4mDYbkCwcFpy5hEpfGj9AcN17hl/aSeol+lqlObzN+P6r12pZb8x0gALOECyy/LfqeqHUmaiPiXmDUzJENKHJWrh3BjcjR6ierMt28LY++RVFzb1+HOP+c+UTcFg9/R8m29dYMy7G5DQf8PNolfLxqt0vT4gZxPbtp6brTCH9tQfyzkTpzGrwRDCfcXGXUnwSStuVbCaYbtx8hJSnmvoM+z9oGkjSe9BjV6Dv5CDHP6xcBhnSQWpqdHoYbNfZH6W+QWATlvYB/MosROTH7vju9uq3hPDYupGMEcHKMNq3j1V+bwsc3Zb+4u95OtM94xaGJTU11bzc/g== 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 Remote Action Request (RAR) is a TLB flushing broadcast facility. This patch introduces RAR MSRs. RAR is introduced in later patches. There are five RAR MSRs: MSR_CORE_CAPABILITIES MSR_IA32_RAR_CTRL MSR_IA32_RAR_ACT_VEC MSR_IA32_RAR_PAYLOAD_BASE MSR_IA32_RAR_INFO Signed-off-by: Yu-cheng Yu Signed-off-by: Rik van Riel --- arch/x86/include/asm/msr-index.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index 0828b891fe2e..923e17462712 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -122,6 +122,17 @@ #define SNB_C3_AUTO_UNDEMOTE (1UL << 27) #define SNB_C1_AUTO_UNDEMOTE (1UL << 28) +/* + * Remote Action Requests (RAR) MSRs + */ +#define MSR_IA32_RAR_CTRL 0x000000ed +#define MSR_IA32_RAR_ACT_VEC 0x000000ee +#define MSR_IA32_RAR_PAYLOAD_BASE 0x000000ef +#define MSR_IA32_RAR_INFO 0x000000f0 + +#define RAR_CTRL_ENABLE BIT(31) +#define RAR_CTRL_IGNORE_IF BIT(30) + #define MSR_MTRRcap 0x000000fe #define MSR_IA32_ARCH_CAPABILITIES 0x0000010a -- 2.49.0