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arm/arm64: KVM: Add PSCI_VERSION helper 

As we're about to trigger a PSCI version explosion, it doesn't
hurt to introduce a PSCI_VERSION helper that is going to be
used everywhere.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Marc Zyngier 2018-02-06 17:56:09 +00:00 committed by Catalin Marinas
parent 1a2fb94e6a
commit d0a144f12a
3 changed files with 8 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/kvm/arm_psci.h
View File

@ -18,8 +18,10 @@
#ifndef __KVM_ARM_PSCI_H__
#define __KVM_ARM_PSCI_H__
#define KVM_ARM_PSCI_0_1 1
#define KVM_ARM_PSCI_0_2 2
#include <uapi/linux/psci.h>
#define KVM_ARM_PSCI_0_1 PSCI_VERSION(0, 1)
#define KVM_ARM_PSCI_0_2 PSCI_VERSION(0, 2)
int kvm_psci_version(struct kvm_vcpu *vcpu);
int kvm_psci_call(struct kvm_vcpu *vcpu);

3
include/uapi/linux/psci.h
View File

@ -88,6 +88,9 @@
(((ver) & PSCI_VERSION_MAJOR_MASK) >> PSCI_VERSION_MAJOR_SHIFT)
#define PSCI_VERSION_MINOR(ver) \
((ver) & PSCI_VERSION_MINOR_MASK)
#define PSCI_VERSION(maj, min) \
((((maj) << PSCI_VERSION_MAJOR_SHIFT) & PSCI_VERSION_MAJOR_MASK) | \
((min) & PSCI_VERSION_MINOR_MASK))
/* PSCI features decoding (>=1.0) */
#define PSCI_1_0_FEATURES_CPU_SUSPEND_PF_SHIFT 1

4
virt/kvm/arm/psci.c
View File

@ -25,8 +25,6 @@
#include <kvm/arm_psci.h>
#include <uapi/linux/psci.h>
/*
* This is an implementation of the Power State Coordination Interface
* as described in ARM document number ARM DEN 0022A.
@ -222,7 +220,7 @@ static int kvm_psci_0_2_call(struct kvm_vcpu *vcpu)
* Bits[31:16] = Major Version = 0
* Bits[15:0] = Minor Version = 2
*/
val = 2;
val = KVM_ARM_PSCI_0_2;
break;
case PSCI_0_2_FN_CPU_SUSPEND:
case PSCI_0_2_FN64_CPU_SUSPEND: