arm64: Statically enable TSO for KVM VM
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
diff --git a/arm64/kvm.c b/arm64/kvm.c
index 23b4dab..105ccb5 100644
--- a/arm64/kvm.c
+++ b/arm64/kvm.c
@@ -119,6 +119,23 @@
pr_debug("MTE capability enabled");
}
+#define APPLE_VIRT_TSO_IO 0x61
+#define APPLE_VIRT_TSO_ENABLE _IOW(APPLE_VIRT_TSO_IO, 0x00, int *)
+
+static void kvm__arch_enable_tso(struct kvm *kvm)
+{
+ int fd;
+
+ fd = open("/dev/apple_virt_tso", O_RDWR);
+ if (fd < 0)
+ die_perror("open()");
+
+ if (ioctl(fd, APPLE_VIRT_TSO_ENABLE, &kvm->vm_fd))
+ die_perror("APPLE_VIRT_TSO_ENABLE");
+
+ close(fd);
+}
+
void kvm__arch_init(struct kvm *kvm)
{
/* Create the virtual GIC. */
@@ -126,6 +143,7 @@
die("Failed to create virtual GIC");
kvm__arch_enable_mte(kvm);
+ kvm__arch_enable_tso(kvm);
}
static u64 kvm__arch_get_payload_region_size(struct kvm *kvm)
