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authorMarc Zyngier <marc.zyngier@arm.com>2018-02-06 17:56:13 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2018-02-06 22:54:03 +0000
commita4097b351118e821841941a79ec77d3ce3f1c5d9 (patch)
treef2ad313657833c68e8df651b270fbef2cf05c145 /include/kvm
parent09e6be12effdb33bf7210c8867bbd213b66a499e (diff)
arm/arm64: KVM: Turn kvm_psci_version into a static inline
We're about to need kvm_psci_version in HYP too. So let's turn it into a static inline, and pass the kvm structure as a second parameter (so that HYP can do a kern_hyp_va on it). Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'include/kvm')
-rw-r--r--include/kvm/arm_psci.h21
1 files changed, 20 insertions, 1 deletions
diff --git a/include/kvm/arm_psci.h b/include/kvm/arm_psci.h
index ed1dd8088f1c..e518e4e3dfb5 100644
--- a/include/kvm/arm_psci.h
+++ b/include/kvm/arm_psci.h
@@ -18,6 +18,7 @@
#ifndef __KVM_ARM_PSCI_H__
#define __KVM_ARM_PSCI_H__
+#include <linux/kvm_host.h>
#include <uapi/linux/psci.h>
#define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1)
@@ -26,7 +27,25 @@
#define KVM_ARM_PSCI_LATEST KVM_ARM_PSCI_1_0
-int kvm_psci_version(struct kvm_vcpu *vcpu);
+/*
+ * We need the KVM pointer independently from the vcpu as we can call
+ * this from HYP, and need to apply kern_hyp_va on it...
+ */
+static inline int kvm_psci_version(struct kvm_vcpu *vcpu, struct kvm *kvm)
+{
+ /*
+ * Our PSCI implementation stays the same across versions from
+ * v0.2 onward, only adding the few mandatory functions (such
+ * as FEATURES with 1.0) that are required by newer
+ * revisions. It is thus safe to return the latest.
+ */
+ if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features))
+ return KVM_ARM_PSCI_LATEST;
+
+ return KVM_ARM_PSCI_0_1;
+}
+
+
int kvm_hvc_call_handler(struct kvm_vcpu *vcpu);
#endif /* __KVM_ARM_PSCI_H__ */