For realms, force the F_ACCESS_PLATFORM flag to ensure DMA-APIs are triggered for virtio in Linux Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx> --- arm/aarch64/kvm.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arm/aarch64/kvm.c b/arm/aarch64/kvm.c index a4664237..1f3a0def 100644 --- a/arm/aarch64/kvm.c +++ b/arm/aarch64/kvm.c @@ -5,6 +5,7 @@ #include <linux/byteorder.h> #include <linux/cpumask.h> #include <linux/sizes.h> +#include <linux/virtio_config.h> #include <kvm/util.h> @@ -237,5 +238,10 @@ void kvm__arch_enable_mte(struct kvm *kvm) u64 kvm__arch_get_virtio_host_features(struct kvm *kvm) { - return 0; + u64 features = 0; + + /* Enforce F_ACCESS_PLATFORM for Realms */ + if (kvm->cfg.arch.is_realm) + features |= (1ULL << VIRTIO_F_ACCESS_PLATFORM); + return features; } -- 2.34.1