Linux kernel knows how to parse "arm,armv8", not "arm,arm-v8".

See arch/arm64/boot/dts/foundation-v8.dts:

  https://github.com/torvalds/linux/commit/90556ca1ebdd

Cc: qemu-stable@nongnu.org
Fixes: 26861c7ce06 ("target-arm: Add minimal KVM AArch64 support")
Fixes: 585df85efea ("hvf: arm: Implement -cpu host")
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/hvf/hvf.c | 2 +-
 target/arm/kvm.c     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index d4c58516e8b..bf59b17dcb9 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -879,7 +879,7 @@ static bool hvf_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
     hv_vcpu_exit_t *exit;
     int i;
 
-    ahcf->dtb_compatible = "arm,arm-v8";
+    ahcf->dtb_compatible = "arm,armv8";
     ahcf->features = (1ULL << ARM_FEATURE_V8) |
                      (1ULL << ARM_FEATURE_NEON) |
                      (1ULL << ARM_FEATURE_AARCH64) |
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index 74fda8b8090..9a1b031556a 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -266,7 +266,7 @@ static bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
     }
 
     ahcf->target = init.target;
-    ahcf->dtb_compatible = "arm,arm-v8";
+    ahcf->dtb_compatible = "arm,armv8";
 
     err = read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64pfr0,
                          ARM64_SYS_REG(3, 0, 0, 4, 0));
-- 
2.49.0