[RFC kvmtool 01/31] arm64: Disable MTE when CFI flash is emulated

[Suzuki K Poulose]

CFI Flash file image cannot be mapped into the memory of the
guest if MTE is enabled. Thus disable MTE if flash emulation
is requested.

Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
---
 arm/aarch64/kvm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arm/aarch64/kvm.c b/arm/aarch64/kvm.c
index 54200c9e..5a53badb 100644
--- a/arm/aarch64/kvm.c
+++ b/arm/aarch64/kvm.c
@@ -145,6 +145,12 @@ void kvm__arch_enable_mte(struct kvm *kvm)
 		return;
 	}
 
+	if (kvm->cfg.flash_filename) {
+		kvm->cfg.arch.mte_disabled = true;
+		pr_info("MTE is incompatible with CFI flash support, disabling");
+		return;
+	}
+
 	if (kvm->cfg.arch.mte_disabled) {
 		pr_debug("MTE disabled by user");
 		return;
-- 
2.34.1