linux-kernel - [PATCH RFC v2 29/29] mm: asi: Stop ignoring asi=on cmdline flag

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Message-ID: <20250110-asi-rfc-v2-v2-29-8419288bc805@google.com>
Date: Fri, 10 Jan 2025 18:40:55 +0000
From: Brendan Jackman <jackmanb@...gle.com>
To: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, 
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	Brendan Jackman <jackmanb@...gle.com>
Subject: [PATCH RFC v2 29/29] mm: asi: Stop ignoring asi=on cmdline flag

At this point the minimum requirements are in place for the kernel to
operate correctly with ASI enabled.

Signed-off-by: Brendan Jackman <jackmanb@...gle.com>
---
 arch/x86/mm/asi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/asi.c b/arch/x86/mm/asi.c
index f10f6614b26148e5ba423d8a44f640674573ee40..3e3956326936ea8550308ad004dbbb3738546f9f 100644
--- a/arch/x86/mm/asi.c
+++ b/arch/x86/mm/asi.c
@@ -207,14 +207,14 @@ void __init asi_check_boottime_disable(void)
 		pr_info("ASI disabled through kernel command line.\n");
 	} else if (ret == 2 && !strncmp(arg, "on", 2)) {
 		enabled = true;
-		pr_info("Ignoring asi=on param while ASI implementation is incomplete.\n");
+		pr_info("ASI enabled through kernel command line.\n");
 	} else {
 		pr_info("ASI %s by default.\n",
 			enabled ? "enabled" : "disabled");
 	}
 
 	if (enabled)
-		pr_info("ASI enablement ignored due to incomplete implementation.\n");
+		setup_force_cpu_cap(X86_FEATURE_ASI);
 }
 
 /*

-- 
2.47.1.613.gc27f4b7a9f-goog