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Subject[PATCH v11 4/6] target-arm: kvm64: detect guest RAS EXTENSION feature
Date
check if kvm supports guest RAS EXTENSION. if so, set
corresponding feature bit for vcpu.

Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
---
linux-headers/linux/kvm.h | 1 +
target/arm/cpu.h | 3 +++
target/arm/kvm64.c | 8 ++++++++
3 files changed, 12 insertions(+)

diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index 7971a4f..2aa176e 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -929,6 +929,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_PPC_SMT_POSSIBLE 147
#define KVM_CAP_HYPERV_SYNIC2 148
#define KVM_CAP_HYPERV_VP_INDEX 149
+#define KVM_CAP_ARM_RAS_EXTENSION 150

#ifdef KVM_CAP_IRQ_ROUTING

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index b39d64a..6b0961b 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -611,6 +611,8 @@ struct ARMCPU {

/* CPU has memory protection unit */
bool has_mpu;
+ /* CPU has ras extension unit */
+ bool has_ras_extension;
/* PMSAv7 MPU number of supported regions */
uint32_t pmsav7_dregion;

@@ -1229,6 +1231,7 @@ enum arm_features {
ARM_FEATURE_THUMB_DSP, /* DSP insns supported in the Thumb encodings */
ARM_FEATURE_PMU, /* has PMU support */
ARM_FEATURE_VBAR, /* has cp15 VBAR */
+ ARM_FEATURE_RAS_EXTENSION, /*has RAS extension support */
};

static inline int arm_feature(CPUARMState *env, int feature)
diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c
index a16abc8..0781367 100644
--- a/target/arm/kvm64.c
+++ b/target/arm/kvm64.c
@@ -518,6 +518,14 @@ int kvm_arch_init_vcpu(CPUState *cs)
unset_feature(&env->features, ARM_FEATURE_PMU);
}

+ if (kvm_check_extension(cs->kvm_state, KVM_CAP_ARM_RAS_EXTENSION)) {
+ cpu->has_ras_extension = true;
+ set_feature(&env->features, ARM_FEATURE_RAS_EXTENSION);
+ } else {
+ cpu->has_ras_extension = false;
+ unset_feature(&env->features, ARM_FEATURE_RAS_EXTENSION);
+ }
+
/* Do KVM_ARM_VCPU_INIT ioctl */
ret = kvm_arm_vcpu_init(cs);
if (ret) {
--
1.8.3.1
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