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Commit 40228ba5 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

KVM: arm64: vgic-v3: Add ICV_DIR_EL1 handler 



Add a handler for writing the guest's view of the ICC_DIR_EL1
register, performing the deactivation of an interrupt if EOImode
is set ot 1.

Tested-by: default avatarAlexander Graf <agraf@suse.de>
Acked-by: default avatarDavid Daney <david.daney@cavium.com>
Reviewed-by: default avatarChristoffer Dall <cdall@linaro.org>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarChristoffer Dall <cdall@linaro.org>
parent 690a3415

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

+27 −0
Original line number Diff line number Diff line
@@ -652,6 +652,30 @@ static void __hyp_text __vgic_v3_bump_eoicount(void) 
	write_gicreg(hcr, ICH_HCR_EL2);

}



static void __hyp_text __vgic_v3_write_dir(struct kvm_vcpu *vcpu,

					   u32 vmcr, int rt)

{

	u32 vid = vcpu_get_reg(vcpu, rt);

	u64 lr_val;

	int lr;



	/* EOImode == 0, nothing to be done here */

	if (!(vmcr & ICH_VMCR_EOIM_MASK))

		return;



	/* No deactivate to be performed on an LPI */

	if (vid >= VGIC_MIN_LPI)

		return;



	lr = __vgic_v3_find_active_lr(vcpu, vid, &lr_val);

	if (lr == -1) {

		__vgic_v3_bump_eoicount();

		return;

	}



	__vgic_v3_clear_active_lr(lr, lr_val);

}



static void __hyp_text __vgic_v3_write_eoir(struct kvm_vcpu *vcpu, u32 vmcr, int rt)

{

	u32 vid = vcpu_get_reg(vcpu, rt);
@@ -946,6 +970,9 @@ int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu) 
		else

			fn = __vgic_v3_write_bpr0;

		break;

	case SYS_ICC_DIR_EL1:

		fn = __vgic_v3_write_dir;

		break;

	default:

		return 0;

	}