[PATCH v3 09/32] arm64: KVM: user space interface

[Will Deacon]

On Mon, Apr 08, 2013 at 05:17:11PM +0100, Marc Zyngier wrote:
> Provide the kvm.h file that defines the user space visible
> interface.
> 
> Reviewed-by: Christopher Covington <cov at codeaurora.org>
> Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
> ---
>  arch/arm64/include/uapi/asm/kvm.h | 117 ++++++++++++++++++++++++++++++++++++++
>  1 file changed, 117 insertions(+)
>  create mode 100644 arch/arm64/include/uapi/asm/kvm.h
> 
> diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h
> new file mode 100644
> index 0000000..4e64570
> --- /dev/null
> +++ b/arch/arm64/include/uapi/asm/kvm.h
> @@ -0,0 +1,117 @@
> +/*
> + * Copyright (C) 2012,2013 - ARM Ltd
> + * Author: Marc Zyngier <marc.zyngier at arm.com>
> + *
> + * Derived from arch/arm/include/uapi/asm/kvm.h:
> + * Copyright (C) 2012 - Virtual Open Systems and Columbia University
> + * Author: Christoffer Dall <c.dall at virtualopensystems.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program.  If not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#ifndef __ARM_KVM_H__
> +#define __ARM_KVM_H__
> +
> +#define KVM_SPSR_EL1	0
> +#define KVM_NR_SPSR	1
> +
> +#ifndef __ASSEMBLY__
> +#include <asm/types.h>
> +#include <asm/ptrace.h>
> +
> +#define __KVM_HAVE_GUEST_DEBUG
> +#define __KVM_HAVE_IRQ_LINE
> +
> +#define KVM_REG_SIZE(id)						\
> +	(1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
> +
> +struct kvm_regs {
> +	struct user_pt_regs regs;	/* sp = sp_el0 */
> +
> +	__u64	sp_el1;
> +	__u64	elr_el1;
> +
> +	__u64	spsr[KVM_NR_SPSR];
> +
> +	struct user_fpsimd_state fp_regs;
> +};
> +
> +/* Supported Processor Types */
> +#define KVM_ARM_TARGET_AEM_V8		0
> +#define KVM_ARM_TARGET_FOUNDATION_V8	1
> +#define KVM_ARM_TARGET_CORTEX_A57	2
> +
> +#define KVM_ARM_NUM_TARGETS		3
> +
> +/* KVM_ARM_SET_DEVICE_ADDR ioctl id encoding */
> +#define KVM_ARM_DEVICE_TYPE_SHIFT	0
> +#define KVM_ARM_DEVICE_TYPE_MASK	(0xffff << KVM_ARM_DEVICE_TYPE_SHIFT)
> +#define KVM_ARM_DEVICE_ID_SHIFT		16
> +#define KVM_ARM_DEVICE_ID_MASK		(0xffff << KVM_ARM_DEVICE_ID_SHIFT)
> +
> +/* Supported device IDs */
> +#define KVM_ARM_DEVICE_VGIC_V2		0
> +
> +/* Supported VGIC address types  */
> +#define KVM_VGIC_V2_ADDR_TYPE_DIST	0
> +#define KVM_VGIC_V2_ADDR_TYPE_CPU	1
> +
> +#define KVM_VGIC_V2_DIST_SIZE		0x1000
> +#define KVM_VGIC_V2_CPU_SIZE		0x2000

How does this work with 64k pages?

> +struct kvm_vcpu_init {
> +	__u32 target;
> +	__u32 features[7];
> +};
> +
> +struct kvm_sregs {
> +};
> +
> +struct kvm_fpu {
> +};
> +
> +struct kvm_guest_debug_arch {
> +};
> +
> +struct kvm_debug_exit_arch {
> +};
> +
> +struct kvm_sync_regs {
> +};
> +
> +struct kvm_arch_memory_slot {
> +};
> +
> +/* KVM_IRQ_LINE irq field index values */
> +#define KVM_ARM_IRQ_TYPE_SHIFT		24
> +#define KVM_ARM_IRQ_TYPE_MASK		0xff
> +#define KVM_ARM_IRQ_VCPU_SHIFT		16
> +#define KVM_ARM_IRQ_VCPU_MASK		0xff
> +#define KVM_ARM_IRQ_NUM_SHIFT		0
> +#define KVM_ARM_IRQ_NUM_MASK		0xffff
> +
> +/* irq_type field */
> +#define KVM_ARM_IRQ_TYPE_CPU		0
> +#define KVM_ARM_IRQ_TYPE_SPI		1
> +#define KVM_ARM_IRQ_TYPE_PPI		2
> +
> +/* out-of-kernel GIC cpu interrupt injection irq_number field */
> +#define KVM_ARM_IRQ_CPU_IRQ		0
> +#define KVM_ARM_IRQ_CPU_FIQ		1

Do we need this support for AArch64?