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Commit 33e64847 authored by Mark Rutland's avatar Mark Rutland Committed by Greg Kroah-Hartman
Browse files

arm/arm64: KVM: Add PSCI_VERSION helper 




From: Marc Zyngier <marc.zyngier@arm.com>

commit d0a144f12a7ca8368933eae6583c096c363ec506 upstream.

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: default avatarChristoffer Dall <christoffer.dall@linaro.org>
Tested-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
[v4.9: account for files moved to virt/ upstream]
Signed-off-by: Mark Rutland <mark.rutland@arm.com> [v4.9 backport]
Tested-by: default avatarGreg Hackmann <ghackmann@google.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8b106aff

arch/arm/kvm/psci.c

+1 −3
Original line number Diff line number Diff line
@@ -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.
@@ -220,7 +218,7 @@ 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:

include/kvm/arm_psci.h

+4 −2
Original line number Diff line number Diff line
@@ -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);

include/uapi/linux/psci.h

+3 −0
Original line number Diff line number Diff line
@@ -87,6 +87,9 @@ 
		(((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