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KVM: arm/arm64: Factor out hypercall handling from PSCI code

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We currently intertwine the KVM PSCI implementation with the general
dispatch of hypercall handling, which makes perfect sense because PSCI
is the only category of hypercalls we support.

However, as we are about to support additional hypercalls, factor out
this functionality into a separate hypercall handler file.

Signed-off-by: Christoffer Dall <christoffer.dall@arm.com>
[steven.price@arm.com: rebased]
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Christoffer Dall
2019-10-21 16:28:15 +01:00
committed by Marc Zyngier
parent 6a7458485b
commit 55009c6ed2
9 changed files with 112 additions and 87 deletions
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43
include/kvm/arm_hypercalls.h Normal file
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@@ -0,0 +1,43 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2019 Arm Ltd. */
#ifndef __KVM_ARM_HYPERCALLS_H
#define __KVM_ARM_HYPERCALLS_H
#include <asm/kvm_emulate.h>
int kvm_hvc_call_handler(struct kvm_vcpu *vcpu);
static inline u32 smccc_get_function(struct kvm_vcpu *vcpu)
{
return vcpu_get_reg(vcpu, 0);
}
static inline unsigned long smccc_get_arg1(struct kvm_vcpu *vcpu)
{
return vcpu_get_reg(vcpu, 1);
}
static inline unsigned long smccc_get_arg2(struct kvm_vcpu *vcpu)
{
return vcpu_get_reg(vcpu, 2);
}
static inline unsigned long smccc_get_arg3(struct kvm_vcpu *vcpu)
{
return vcpu_get_reg(vcpu, 3);
}
static inline void smccc_set_retval(struct kvm_vcpu *vcpu,
unsigned long a0,
unsigned long a1,
unsigned long a2,
unsigned long a3)
{
vcpu_set_reg(vcpu, 0, a0);
vcpu_set_reg(vcpu, 1, a1);
vcpu_set_reg(vcpu, 2, a2);
vcpu_set_reg(vcpu, 3, a3);
}
#endif

2
include/kvm/arm_psci.h
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@@ -40,7 +40,7 @@ static inline int kvm_psci_version(struct kvm_vcpu *vcpu, struct kvm *kvm)
}
int kvm_hvc_call_handler(struct kvm_vcpu *vcpu);
int kvm_psci_call(struct kvm_vcpu *vcpu);
struct kvm_one_reg;