Commit fd59ed3b authored by Andre Przywara's avatar Andre Przywara Committed by Christoffer Dall
Browse files

KVM: arm/arm64: vgic-new: Add GICv3 CTLR, IIDR, TYPER handlers 



As in the GICv2 emulation we handle those three registers in one
function.

Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
Reviewed-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
parent ed9b8cef

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

+47 −1
Original line number Diff line number Diff line
@@ -22,6 +22,52 @@ 
#include "vgic.h"

#include "vgic-mmio.h"



static unsigned long vgic_mmio_read_v3_misc(struct kvm_vcpu *vcpu,

					    gpa_t addr, unsigned int len)

{

	u32 value = 0;



	switch (addr & 0x0c) {

	case GICD_CTLR:

		if (vcpu->kvm->arch.vgic.enabled)

			value |= GICD_CTLR_ENABLE_SS_G1;

		value |= GICD_CTLR_ARE_NS | GICD_CTLR_DS;

		break;

	case GICD_TYPER:

		value = vcpu->kvm->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS;

		value = (value >> 5) - 1;

		value |= (INTERRUPT_ID_BITS_SPIS - 1) << 19;

		break;

	case GICD_IIDR:

		value = (PRODUCT_ID_KVM << 24) | (IMPLEMENTER_ARM << 0);

		break;

	default:

		return 0;

	}



	return value;

}



static void vgic_mmio_write_v3_misc(struct kvm_vcpu *vcpu,

				    gpa_t addr, unsigned int len,

				    unsigned long val)

{

	struct vgic_dist *dist = &vcpu->kvm->arch.vgic;

	bool was_enabled = dist->enabled;



	switch (addr & 0x0c) {

	case GICD_CTLR:

		dist->enabled = val & GICD_CTLR_ENABLE_SS_G1;



		if (!was_enabled && dist->enabled)

			vgic_kick_vcpus(vcpu->kvm);

		break;

	case GICD_TYPER:

	case GICD_IIDR:

		return;

	}

}



/*

 * The GICv3 per-IRQ registers are split to control PPIs and SGIs in the

 * redistributors, while SPIs are covered by registers in the distributor
@@ -48,7 +94,7 @@ 


static const struct vgic_register_region vgic_v3_dist_registers[] = {

	REGISTER_DESC_WITH_LENGTH(GICD_CTLR,

		vgic_mmio_read_raz, vgic_mmio_write_wi, 16,

		vgic_mmio_read_v3_misc, vgic_mmio_write_v3_misc, 16,

		VGIC_ACCESS_32bit),

	REGISTER_DESC_WITH_BITS_PER_IRQ_SHARED(GICD_IGROUPR,

		vgic_mmio_read_rao, vgic_mmio_write_wi, 1,

virt/kvm/arm/vgic/vgic.h

+1 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#define PRODUCT_ID_KVM		0x4b	/* ASCII code K */

#define IMPLEMENTER_ARM		0x43b



#define INTERRUPT_ID_BITS_SPIS	10

#define VGIC_PRI_BITS		5



#define vgic_irq_is_sgi(intid) ((intid) < VGIC_NR_SGIS)