[PATCH 32/39] arm/arm64: KVM: Turn kvm_psci_version into a static inline
Alex Shi
alex.shi at linaro.org
Fri Mar 9 01:07:15 PST 2018
From: Marc Zyngier <marc.zyngier at arm.com>
commit a4097b351118 upstream.
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 at linaro.org>
Reviewed-by: Christoffer Dall <christoffer.dall at linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas at arm.com>
Signed-off-by: Will Deacon <will.deacon at arm.com>
Signed-off-by: Alex Shi <alex.shi at linaro.org>
---
arch/arm/kvm/psci.c | 12 ++----------
include/kvm/arm_psci.h | 21 ++++++++++++++++++++-
2 files changed, 22 insertions(+), 11 deletions(-)
diff --git a/arch/arm/kvm/psci.c b/arch/arm/kvm/psci.c
index a74e3a67ef7a..6f691d7b9fdc 100644
--- a/arch/arm/kvm/psci.c
+++ b/arch/arm/kvm/psci.c
@@ -121,7 +121,7 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu)
if (!vcpu)
return PSCI_RET_INVALID_PARAMS;
if (!vcpu->arch.power_off) {
- if (kvm_psci_version(source_vcpu) != KVM_ARM_PSCI_0_1)
+ if (kvm_psci_version(source_vcpu, kvm) != KVM_ARM_PSCI_0_1)
return PSCI_RET_ALREADY_ON;
else
return PSCI_RET_INVALID_PARAMS;
@@ -231,14 +231,6 @@ static void kvm_psci_system_reset(struct kvm_vcpu *vcpu)
kvm_prepare_system_event(vcpu, KVM_SYSTEM_EVENT_RESET);
}
-int kvm_psci_version(struct kvm_vcpu *vcpu)
-{
- if (test_bit(KVM_ARM_VCPU_PSCI_0_2, vcpu->arch.features))
- return KVM_ARM_PSCI_LATEST;
-
- return KVM_ARM_PSCI_0_1;
-}
-
static int kvm_psci_0_2_call(struct kvm_vcpu *vcpu)
{
struct kvm *kvm = vcpu->kvm;
@@ -396,7 +388,7 @@ static int kvm_psci_0_1_call(struct kvm_vcpu *vcpu)
*/
static int kvm_psci_call(struct kvm_vcpu *vcpu)
{
- switch (kvm_psci_version(vcpu)) {
+ switch (kvm_psci_version(vcpu, vcpu->kvm)) {
case KVM_ARM_PSCI_1_0:
return kvm_psci_1_0_call(vcpu);
case KVM_ARM_PSCI_0_2:
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__ */
--
2.16.2.440.gc6284da
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