[RESEND,v12,06/12] target-arm: kvm64: detect whether can set vsesr_el2

Commit Message

Dongjiu Geng Nov. 21, 2017, 6:37 p.m. UTC

Check if kvm can support to set vsesr_el2 value for vcpu. When
guest takes a virtual SError interrupt exception, this value
will provides syndrome value reported into ESR_EL1 ISS filed.

Signed-off-by: Dongjiu Geng <[e-mail]>
Signed-off-by: Quanming Wu <[e-mail]>

---
Address James's([e-mail]) comments to detect whether KVM has the capability to set ESR
instead of detecting CPU RAS capability in [1]

[1]
https://www.spinics.net/lists/kvm-arm/msg27150.html
https://www.spinics.net/lists/arm-kernel/msg604440.html
---
 target/arm/kvm64.c | 6 ++++++
 1 file changed, 6 insertions(+)

Patch

diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c
index a16abc8..af8ebc9 100644
--- a/target/arm/kvm64.c
+++ b/target/arm/kvm64.c
@@ -980,3 +980,9 @@  bool kvm_arm_handle_debug(CPUState *cs, struct kvm_debug_exit_arch *debug_exit)
 
     return false;
 }
+
+static bool kvm_can_set_vcpu_esr(struct KVMState *state)
+{
+    int ret = kvm_check_extension(state, KVM_CAP_ARM_INJECT_SERROR_ESR);
+    return (ret) ? true : false;
+}