Commit 7aa8d146 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

arm/arm64: KVM: Introduce kvm_call_hyp_ret() 



Until now, we haven't differentiated between HYP calls that
have a return value and those who don't. As we're about to
change this, introduce kvm_call_hyp_ret(), and change all
call sites that actually make use of a return value.

Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Acked-by: default avatarChristoffer Dall <christoffer.dall@arm.com>
Signed-off-by: default avatarChristoffer Dall <christoffer.dall@arm.com>
parent ee793049

arch/arm/include/asm/kvm_host.h

+3 −0
Original line number Diff line number Diff line
@@ -214,7 +214,10 @@ unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); 
int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);

int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);

int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);



unsigned long kvm_call_hyp(void *hypfn, ...);

#define kvm_call_hyp_ret(f, ...) kvm_call_hyp(f, ##__VA_ARGS__)



void force_vm_exit(const cpumask_t *mask);

int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,

			      struct kvm_vcpu_events *events);

arch/arm64/include/asm/kvm_host.h

+1 −0
Original line number Diff line number Diff line
@@ -371,6 +371,7 @@ void kvm_arm_resume_guest(struct kvm *kvm); 


u64 __kvm_call_hyp(void *hypfn, ...);

#define kvm_call_hyp(f, ...) __kvm_call_hyp(kvm_ksym_ref(f), ##__VA_ARGS__)

#define kvm_call_hyp_ret(f, ...) kvm_call_hyp(f, ##__VA_ARGS__)



void force_vm_exit(const cpumask_t *mask);

void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);

arch/arm64/kvm/debug.c

+1 −1
Original line number Diff line number Diff line
@@ -76,7 +76,7 @@ static void restore_guest_debug_regs(struct kvm_vcpu *vcpu) 


void kvm_arm_init_debug(void)

{

	__this_cpu_write(mdcr_el2, kvm_call_hyp(__kvm_get_mdcr_el2));

	__this_cpu_write(mdcr_el2, kvm_call_hyp_ret(__kvm_get_mdcr_el2));

}



/**

virt/kvm/arm/arm.c

+1 −1
Original line number Diff line number Diff line
@@ -765,7 +765,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) 
			ret = kvm_vcpu_run_vhe(vcpu);

			kvm_arm_vhe_guest_exit();

		} else {

			ret = kvm_call_hyp(__kvm_vcpu_run_nvhe, vcpu);

			ret = kvm_call_hyp_ret(__kvm_vcpu_run_nvhe, vcpu);

		}



		vcpu->mode = OUTSIDE_GUEST_MODE;

virt/kvm/arm/vgic/vgic-v3.c

+2 −2
Original line number Diff line number Diff line
@@ -589,7 +589,7 @@ early_param("kvm-arm.vgic_v4_enable", early_gicv4_enable); 
 */

int vgic_v3_probe(const struct gic_kvm_info *info)

{

	u32 ich_vtr_el2 = kvm_call_hyp(__vgic_v3_get_ich_vtr_el2);

	u32 ich_vtr_el2 = kvm_call_hyp_ret(__vgic_v3_get_ich_vtr_el2);

	int ret;



	/*
@@ -679,7 +679,7 @@ void vgic_v3_put(struct kvm_vcpu *vcpu) 
	struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;



	if (likely(cpu_if->vgic_sre))

		cpu_if->vgic_vmcr = kvm_call_hyp(__vgic_v3_read_vmcr);

		cpu_if->vgic_vmcr = kvm_call_hyp_ret(__vgic_v3_read_vmcr);



	kvm_call_hyp(__vgic_v3_save_aprs, vcpu);

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