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From: Vladimir Murzin <vladimir.murzin@arm.com>
To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu
Cc: alexandru.elisei@arm.com, will@kernel.org, maz@kernel.org
Subject: [PATCH kvmtool] aarch64: Give up with MTE for AArch32 guest
Date: Fri, 20 May 2022 13:38:44 +0100	[thread overview]
Message-ID: <20220520123844.127733-1-vladimir.murzin@arm.com> (raw)

KVM doesn't support combination of MTE and AArch32 guest, so do not
even try.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
---
 arm/aarch64/kvm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arm/aarch64/kvm.c b/arm/aarch64/kvm.c
index 1b992dd..f3fe854 100644
--- a/arm/aarch64/kvm.c
+++ b/arm/aarch64/kvm.c
@@ -120,6 +120,11 @@ void kvm__arch_enable_mte(struct kvm *kvm)
 		.cap = KVM_CAP_ARM_MTE,
 	};
 
+	if (kvm->cfg.arch.aarch32_guest) {
+		pr_debug("MTE is incompatible with AArch32");
+		return;
+	}
+
 	if (kvm->cfg.arch.mte_disabled) {
 		pr_debug("MTE disabled by user");
 		return;
-- 
2.25.1


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             reply	other threads:[~2022-05-20 12:40 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-20 12:38 Vladimir Murzin [this message]
2022-05-20 13:31 ` [PATCH kvmtool] aarch64: Give up with MTE for AArch32 guest Alexandru Elisei
2022-05-20 13:48   ` Vladimir Murzin
2022-05-20 14:01     ` Alexandru Elisei
2022-05-20 20:51 ` Will Deacon

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