linux-kernel - [PATCH RFC 37/37] arm64: mte: Enable tag storage management

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Message-Id: <20230823131350.114942-38-alexandru.elisei@arm.com>
Date:   Wed, 23 Aug 2023 14:13:50 +0100
From:   Alexandru Elisei <alexandru.elisei@....com>
To:     catalin.marinas@....com, will@...nel.org, oliver.upton@...ux.dev,
        maz@...nel.org, james.morse@....com, suzuki.poulose@....com,
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Cc:     pcc@...gle.com, steven.price@....com, anshuman.khandual@....com,
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Subject: [PATCH RFC 37/37] arm64: mte: Enable tag storage management

Everything is in place, enable tag storage management.

Signed-off-by: Alexandru Elisei <alexandru.elisei@....com>
---
 arch/arm64/kernel/mte_tag_storage.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/kernel/mte_tag_storage.c b/arch/arm64/kernel/mte_tag_storage.c
index 1ccbcc144979..18264bc8f590 100644
--- a/arch/arm64/kernel/mte_tag_storage.c
+++ b/arch/arm64/kernel/mte_tag_storage.c
@@ -399,6 +399,12 @@ static int __init mte_tag_storage_activate_regions(void)
 	}
 
 	ret = reserve_metadata_storage(ZERO_PAGE(0), 0, GFP_HIGHUSER_MOVABLE);
+	if (ret) {
+		pr_info("MTE tag storage disabled");
+	} else {
+		static_branch_enable(&metadata_storage_enabled_key);
+		pr_info("MTE tag storage enabled\n");
+	}
 
 	return ret;
 }
-- 
2.41.0