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s=arc-20220608; d=hostedemail.com; t=1747703059; a=rsa-sha256; cv=none; b=ideE7GMZItIZz2E/2+hiBY997t7ENGiePGdh0e6bmPWjVlGJUHE7QBA/byscluUusQJ3+3 GjZCsL6PHeALFHzX3YAyvfddpUXtZ/bFFMt0KsmfB0l3OHiKbb41Gw3XXgkz4T+7ChIcqO LfMJAwyGzSdlMLoknJFTK2OFxubLVl8= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf28.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 1uHBOc-000000000aB-42pv; Mon, 19 May 2025 21:03:54 -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, nadav.amit@gmail.com, Yu-cheng Yu , Rik van Riel Subject: [RFC v2 2/9] x86/mm: Introduce Remote Action Request MSRs Date: Mon, 19 May 2025 21:02:27 -0400 Message-ID: <20250520010350.1740223-3-riel@surriel.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250520010350.1740223-1-riel@surriel.com> References: <20250520010350.1740223-1-riel@surriel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: kri4p4h3cx3xrg5ptdo55wiuu8wb3z85 X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 11372C0003 X-HE-Tag: 1747703058-91144 X-HE-Meta: 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 JeirWIza lkIWanvmTUAtY9VFHuVHvN7GoGqNKmriFFBVfwtJtYFhOUifUo+JF0mHVh5AjL0LWSyXHXAIW/3rv8W8yZBsUW7jzTz5Dhq+Db1aDFf9tnpHPukION2hjmHAE0ohTLX02yyWxu8B24g3rLRiwCZ+uv4/TLcmdKZ3IBJKHriuGw0W7kGofUu9f9xk0OS641G2CwKD0QclkNxEkAWH2J2gMaEjOnirX+NbG2D38rb20s8FqIPhMIvbKbdtYxxnEuVuilWqtAYmV27fGxHEp4aGEE7q9tvkgngIuaIEgC078WxhJiUWt9t2f0C+dWTHqdSVVfM1YpB8vmCwaOM1bd8BTaJ70hc0TTW2p/xhPbB06LGJeFQm/q2FOASpvE2DtiSNBgpZokLmVFoTboGIO3AxJfu6dBQ== 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 c848dd4bfceb..adff8f0dc7bb 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