Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-23 19:31:53 +00:00
Code Issues Packages Projects Releases Wiki Activity
da345174ce
linux/arch/arm64/include/uapi/asm/kvm.h
Christoffer Dall da345174ce KVM: arm/arm64: Allow user injection of external data aborts 
In some scenarios, such as buggy guest or incorrect configuration of the
VMM and firmware description data, userspace will detect a memory access
to a portion of the IPA, which is not mapped to any MMIO region.

For this purpose, the appropriate action is to inject an external abort
to the guest.  The kernel already has functionality to inject an
external abort, but we need to wire up a signal from user space that
lets user space tell the kernel to do this.

It turns out, we already have the set event functionality which we can
perfectly reuse for this.

Signed-off-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
2019-10-21 18:59:51 +01:00

376 lines
12 KiB
C
Raw Blame History

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Copyright (C) 2012,2013 - ARM Ltd
* Author: Marc Zyngier <marc.zyngier@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@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_SPSR_SVC KVM_SPSR_EL1
#define KVM_SPSR_ABT 1
#define KVM_SPSR_UND 2
#define KVM_SPSR_IRQ 3
#define KVM_SPSR_FIQ 4
#define KVM_NR_SPSR 5
#ifndef __ASSEMBLY__
#include <linux/psci.h>
#include <linux/types.h>
#include <asm/ptrace.h>
#include <asm/sve_context.h>
#define __KVM_HAVE_GUEST_DEBUG
#define __KVM_HAVE_IRQ_LINE
#define __KVM_HAVE_READONLY_MEM
#define __KVM_HAVE_VCPU_EVENTS
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
#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 CPU Targets - Adding a new target type is not recommended,
* unless there are some special registers not supported by the
* genericv8 syreg table.
*/
#define KVM_ARM_TARGET_AEM_V8 0
#define KVM_ARM_TARGET_FOUNDATION_V8 1
#define KVM_ARM_TARGET_CORTEX_A57 2
#define KVM_ARM_TARGET_XGENE_POTENZA 3
#define KVM_ARM_TARGET_CORTEX_A53 4
/* Generic ARM v8 target */
#define KVM_ARM_TARGET_GENERIC_V8 5
#define KVM_ARM_NUM_TARGETS 6
/* 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
/* Supported VGICv3 address types */
#define KVM_VGIC_V3_ADDR_TYPE_DIST 2
#define KVM_VGIC_V3_ADDR_TYPE_REDIST 3
#define KVM_VGIC_ITS_ADDR_TYPE 4
#define KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION 5
#define KVM_VGIC_V3_DIST_SIZE SZ_64K
#define KVM_VGIC_V3_REDIST_SIZE (2 * SZ_64K)
#define KVM_VGIC_V3_ITS_SIZE (2 * SZ_64K)
#define KVM_ARM_VCPU_POWER_OFF 0 /* CPU is started in OFF state */
#define KVM_ARM_VCPU_EL1_32BIT 1 /* CPU running a 32bit VM */
#define KVM_ARM_VCPU_PSCI_0_2 2 /* CPU uses PSCI v0.2 */
#define KVM_ARM_VCPU_PMU_V3 3 /* Support guest PMUv3 */
#define KVM_ARM_VCPU_SVE 4 /* enable SVE for this CPU */
#define KVM_ARM_VCPU_PTRAUTH_ADDRESS 5 /* VCPU uses address authentication */
#define KVM_ARM_VCPU_PTRAUTH_GENERIC 6 /* VCPU uses generic authentication */
struct kvm_vcpu_init {
__u32 target;
__u32 features[7];
};
struct kvm_sregs {
};
struct kvm_fpu {
};
/*
* See v8 ARM ARM D7.3: Debug Registers
*
* The architectural limit is 16 debug registers of each type although
* in practice there are usually less (see ID_AA64DFR0_EL1).
*
* Although the control registers are architecturally defined as 32
* bits wide we use a 64 bit structure here to keep parity with
* KVM_GET/SET_ONE_REG behaviour which treats all system registers as
* 64 bit values. It also allows for the possibility of the
* architecture expanding the control registers without having to
* change the userspace ABI.
*/
#define KVM_ARM_MAX_DBG_REGS 16
struct kvm_guest_debug_arch {
__u64 dbg_bcr[KVM_ARM_MAX_DBG_REGS];
__u64 dbg_bvr[KVM_ARM_MAX_DBG_REGS];
__u64 dbg_wcr[KVM_ARM_MAX_DBG_REGS];
__u64 dbg_wvr[KVM_ARM_MAX_DBG_REGS];
};
struct kvm_debug_exit_arch {
__u32 hsr;
__u64 far; /* used for watchpoints */
};
/*
* Architecture specific defines for kvm_guest_debug->control
*/
#define KVM_GUESTDBG_USE_SW_BP (1 << 16)
#define KVM_GUESTDBG_USE_HW (1 << 17)
struct kvm_sync_regs {
/* Used with KVM_CAP_ARM_USER_IRQ */
__u64 device_irq_level;
};
struct kvm_arch_memory_slot {
};
/* for KVM_GET/SET_VCPU_EVENTS */
struct kvm_vcpu_events {
struct {
__u8 serror_pending;
__u8 serror_has_esr;
__u8 ext_dabt_pending;
/* Align it to 8 bytes */
__u8 pad[5];
__u64 serror_esr;
} exception;
__u32 reserved[12];
};
/* If you need to interpret the index values, here is the key: */
#define KVM_REG_ARM_COPROC_MASK 0x000000000FFF0000
#define KVM_REG_ARM_COPROC_SHIFT 16
/* Normal registers are mapped as coprocessor 16. */
#define KVM_REG_ARM_CORE (0x0010 << KVM_REG_ARM_COPROC_SHIFT)
#define KVM_REG_ARM_CORE_REG(name) (offsetof(struct kvm_regs, name) / sizeof(__u32))
/* Some registers need more space to represent values. */
#define KVM_REG_ARM_DEMUX (0x0011 << KVM_REG_ARM_COPROC_SHIFT)
#define KVM_REG_ARM_DEMUX_ID_MASK 0x000000000000FF00
#define KVM_REG_ARM_DEMUX_ID_SHIFT 8
#define KVM_REG_ARM_DEMUX_ID_CCSIDR (0x00 << KVM_REG_ARM_DEMUX_ID_SHIFT)
#define KVM_REG_ARM_DEMUX_VAL_MASK 0x00000000000000FF
#define KVM_REG_ARM_DEMUX_VAL_SHIFT 0
/* AArch64 system registers */
#define KVM_REG_ARM64_SYSREG (0x0013 << KVM_REG_ARM_COPROC_SHIFT)
#define KVM_REG_ARM64_SYSREG_OP0_MASK 0x000000000000c000
#define KVM_REG_ARM64_SYSREG_OP0_SHIFT 14
#define KVM_REG_ARM64_SYSREG_OP1_MASK 0x0000000000003800
#define KVM_REG_ARM64_SYSREG_OP1_SHIFT 11
#define KVM_REG_ARM64_SYSREG_CRN_MASK 0x0000000000000780
#define KVM_REG_ARM64_SYSREG_CRN_SHIFT 7
#define KVM_REG_ARM64_SYSREG_CRM_MASK 0x0000000000000078
#define KVM_REG_ARM64_SYSREG_CRM_SHIFT 3
#define KVM_REG_ARM64_SYSREG_OP2_MASK 0x0000000000000007
#define KVM_REG_ARM64_SYSREG_OP2_SHIFT 0
#define ARM64_SYS_REG_SHIFT_MASK(x,n) \
(((x) << KVM_REG_ARM64_SYSREG_ ## n ## _SHIFT) & \
KVM_REG_ARM64_SYSREG_ ## n ## _MASK)
#define __ARM64_SYS_REG(op0,op1,crn,crm,op2) \
(KVM_REG_ARM64 | KVM_REG_ARM64_SYSREG | \
ARM64_SYS_REG_SHIFT_MASK(op0, OP0) | \
ARM64_SYS_REG_SHIFT_MASK(op1, OP1) | \
ARM64_SYS_REG_SHIFT_MASK(crn, CRN) | \
ARM64_SYS_REG_SHIFT_MASK(crm, CRM) | \
ARM64_SYS_REG_SHIFT_MASK(op2, OP2))
#define ARM64_SYS_REG(...) (__ARM64_SYS_REG(__VA_ARGS__) | KVM_REG_SIZE_U64)
/* Physical Timer EL0 Registers */
#define KVM_REG_ARM_PTIMER_CTL ARM64_SYS_REG(3, 3, 14, 2, 1)
#define KVM_REG_ARM_PTIMER_CVAL ARM64_SYS_REG(3, 3, 14, 2, 2)
#define KVM_REG_ARM_PTIMER_CNT ARM64_SYS_REG(3, 3, 14, 0, 1)
/* EL0 Virtual Timer Registers */
#define KVM_REG_ARM_TIMER_CTL ARM64_SYS_REG(3, 3, 14, 3, 1)
#define KVM_REG_ARM_TIMER_CNT ARM64_SYS_REG(3, 3, 14, 3, 2)
#define KVM_REG_ARM_TIMER_CVAL ARM64_SYS_REG(3, 3, 14, 0, 2)
/* KVM-as-firmware specific pseudo-registers */
#define KVM_REG_ARM_FW (0x0014 << KVM_REG_ARM_COPROC_SHIFT)
#define KVM_REG_ARM_FW_REG(r) (KVM_REG_ARM64 | KVM_REG_SIZE_U64 | \
KVM_REG_ARM_FW | ((r) & 0xffff))
#define KVM_REG_ARM_PSCI_VERSION KVM_REG_ARM_FW_REG(0)
#define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1 KVM_REG_ARM_FW_REG(1)
#define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_NOT_AVAIL 0
#define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_AVAIL 1
#define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_NOT_REQUIRED 2
#define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2 KVM_REG_ARM_FW_REG(2)
#define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_NOT_AVAIL 0
#define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_UNKNOWN 1
#define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_AVAIL 2
#define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_NOT_REQUIRED 3
#define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_ENABLED (1U << 4)
/* SVE registers */
#define KVM_REG_ARM64_SVE (0x15 << KVM_REG_ARM_COPROC_SHIFT)
/* Z- and P-regs occupy blocks at the following offsets within this range: */
#define KVM_REG_ARM64_SVE_ZREG_BASE 0
#define KVM_REG_ARM64_SVE_PREG_BASE 0x400
#define KVM_REG_ARM64_SVE_FFR_BASE 0x600
#define KVM_ARM64_SVE_NUM_ZREGS __SVE_NUM_ZREGS
#define KVM_ARM64_SVE_NUM_PREGS __SVE_NUM_PREGS
#define KVM_ARM64_SVE_MAX_SLICES 32
#define KVM_REG_ARM64_SVE_ZREG(n, i) \
(KVM_REG_ARM64 | KVM_REG_ARM64_SVE | KVM_REG_ARM64_SVE_ZREG_BASE | \
KVM_REG_SIZE_U2048 | \
(((n) & (KVM_ARM64_SVE_NUM_ZREGS - 1)) << 5) | \
((i) & (KVM_ARM64_SVE_MAX_SLICES - 1)))
#define KVM_REG_ARM64_SVE_PREG(n, i) \
(KVM_REG_ARM64 | KVM_REG_ARM64_SVE | KVM_REG_ARM64_SVE_PREG_BASE | \
KVM_REG_SIZE_U256 | \
(((n) & (KVM_ARM64_SVE_NUM_PREGS - 1)) << 5) | \
((i) & (KVM_ARM64_SVE_MAX_SLICES - 1)))
#define KVM_REG_ARM64_SVE_FFR(i) \
(KVM_REG_ARM64 | KVM_REG_ARM64_SVE | KVM_REG_ARM64_SVE_FFR_BASE | \
KVM_REG_SIZE_U256 | \
((i) & (KVM_ARM64_SVE_MAX_SLICES - 1)))
/*
* Register values for KVM_REG_ARM64_SVE_ZREG(), KVM_REG_ARM64_SVE_PREG() and
* KVM_REG_ARM64_SVE_FFR() are represented in memory in an endianness-
* invariant layout which differs from the layout used for the FPSIMD
* V-registers on big-endian systems: see sigcontext.h for more explanation.
*/
#define KVM_ARM64_SVE_VQ_MIN __SVE_VQ_MIN
#define KVM_ARM64_SVE_VQ_MAX __SVE_VQ_MAX
/* Vector lengths pseudo-register: */
#define KVM_REG_ARM64_SVE_VLS (KVM_REG_ARM64 | KVM_REG_ARM64_SVE | \
KVM_REG_SIZE_U512 | 0xffff)
#define KVM_ARM64_SVE_VLS_WORDS \
((KVM_ARM64_SVE_VQ_MAX - KVM_ARM64_SVE_VQ_MIN) / 64 + 1)
/* Device Control API: ARM VGIC */
#define KVM_DEV_ARM_VGIC_GRP_ADDR 0
#define KVM_DEV_ARM_VGIC_GRP_DIST_REGS 1
#define KVM_DEV_ARM_VGIC_GRP_CPU_REGS 2
#define KVM_DEV_ARM_VGIC_CPUID_SHIFT 32
#define KVM_DEV_ARM_VGIC_CPUID_MASK (0xffULL << KVM_DEV_ARM_VGIC_CPUID_SHIFT)
#define KVM_DEV_ARM_VGIC_V3_MPIDR_SHIFT 32
#define KVM_DEV_ARM_VGIC_V3_MPIDR_MASK \
(0xffffffffULL << KVM_DEV_ARM_VGIC_V3_MPIDR_SHIFT)
#define KVM_DEV_ARM_VGIC_OFFSET_SHIFT 0
#define KVM_DEV_ARM_VGIC_OFFSET_MASK (0xffffffffULL << KVM_DEV_ARM_VGIC_OFFSET_SHIFT)
#define KVM_DEV_ARM_VGIC_SYSREG_INSTR_MASK (0xffff)
#define KVM_DEV_ARM_VGIC_GRP_NR_IRQS 3
#define KVM_DEV_ARM_VGIC_GRP_CTRL 4
#define KVM_DEV_ARM_VGIC_GRP_REDIST_REGS 5
#define KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS 6
#define KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO 7
#define KVM_DEV_ARM_VGIC_GRP_ITS_REGS 8
#define KVM_DEV_ARM_VGIC_LINE_LEVEL_INFO_SHIFT 10
#define KVM_DEV_ARM_VGIC_LINE_LEVEL_INFO_MASK \
(0x3fffffULL << KVM_DEV_ARM_VGIC_LINE_LEVEL_INFO_SHIFT)
#define KVM_DEV_ARM_VGIC_LINE_LEVEL_INTID_MASK 0x3ff
#define VGIC_LEVEL_INFO_LINE_LEVEL 0
#define KVM_DEV_ARM_VGIC_CTRL_INIT 0
#define KVM_DEV_ARM_ITS_SAVE_TABLES 1
#define KVM_DEV_ARM_ITS_RESTORE_TABLES 2
#define KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES 3
#define KVM_DEV_ARM_ITS_CTRL_RESET 4
/* Device Control API on vcpu fd */
#define KVM_ARM_VCPU_PMU_V3_CTRL 0
#define KVM_ARM_VCPU_PMU_V3_IRQ 0
#define KVM_ARM_VCPU_PMU_V3_INIT 1
#define KVM_ARM_VCPU_TIMER_CTRL 1
#define KVM_ARM_VCPU_TIMER_IRQ_VTIMER 0
#define KVM_ARM_VCPU_TIMER_IRQ_PTIMER 1
/* KVM_IRQ_LINE irq field index values */
#define KVM_ARM_IRQ_VCPU2_SHIFT 28
#define KVM_ARM_IRQ_VCPU2_MASK 0xf
#define KVM_ARM_IRQ_TYPE_SHIFT 24
#define KVM_ARM_IRQ_TYPE_MASK 0xf
#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
/*
* This used to hold the highest supported SPI, but it is now obsolete
* and only here to provide source code level compatibility with older
* userland. The highest SPI number can be set via KVM_DEV_ARM_VGIC_GRP_NR_IRQS.
*/
#ifndef __KERNEL__
#define KVM_ARM_IRQ_GIC_MAX 127
#endif
/* One single KVM irqchip, ie. the VGIC */
#define KVM_NR_IRQCHIPS 1
/* PSCI interface */
#define KVM_PSCI_FN_BASE 0x95c1ba5e
#define KVM_PSCI_FN(n) (KVM_PSCI_FN_BASE + (n))
#define KVM_PSCI_FN_CPU_SUSPEND KVM_PSCI_FN(0)
#define KVM_PSCI_FN_CPU_OFF KVM_PSCI_FN(1)
#define KVM_PSCI_FN_CPU_ON KVM_PSCI_FN(2)
#define KVM_PSCI_FN_MIGRATE KVM_PSCI_FN(3)
#define KVM_PSCI_RET_SUCCESS PSCI_RET_SUCCESS
#define KVM_PSCI_RET_NI PSCI_RET_NOT_SUPPORTED
#define KVM_PSCI_RET_INVAL PSCI_RET_INVALID_PARAMS
#define KVM_PSCI_RET_DENIED PSCI_RET_DENIED
#endif
#endif /* __ARM_KVM_H__ */
Reference in New Issue View Git Blame Copy Permalink