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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Copyright (C) 2013 Cavium, Inc.
* Authors: Sanjay Lal <sanjayl@kymasys.com>
*/
#ifndef __LINUX_KVM_MIPS_H
#define __LINUX_KVM_MIPS_H
#include <linux/types.h>
/*
* KVM MIPS specific structures and definitions.
*
* Some parts derived from the x86 version of this file.
*/
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
/*
* for KVM_GET_REGS and KVM_SET_REGS
*
* If Config[AT] is zero (32-bit CPU), the register contents are
* stored in the lower 32-bits of the struct kvm_regs fields and sign
* extended to 64-bits.
*/
struct kvm_regs {
/* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
__u64 gpr[32];
__u64 hi;
__u64 lo;
__u64 pc;
};
/*
* for KVM_GET_FPU and KVM_SET_FPU
*/
struct kvm_fpu {
};
/*
* For MIPS, we use KVM_SET_ONE_REG and KVM_GET_ONE_REG to access various
* registers. The id field is broken down as follows:
*
* bits[63..52] - As per linux/kvm.h
* bits[51..32] - Must be zero.
* bits[31..16] - Register set.
*
* Register set = 0: GP registers from kvm_regs (see definitions below).
*
* Register set = 1: CP0 registers.
* bits[15..8] - COP0 register set.
*
* COP0 register set = 0: Main CP0 registers.
* bits[7..3] - Register 'rd' index.
* bits[2..0] - Register 'sel' index.
*
* COP0 register set = 1: MAARs.
* bits[7..0] - MAAR index.
*
* Register set = 2: KVM specific registers (see definitions below).
*
* Register set = 3: FPU / MSA registers (see definitions below).
*
* Other sets registers may be added in the future. Each set would
* have its own identifier in bits[31..16].
*/
#define KVM_REG_MIPS_GP (KVM_REG_MIPS | 0x0000000000000000ULL)
#define KVM_REG_MIPS_CP0 (KVM_REG_MIPS | 0x0000000000010000ULL)
#define KVM_REG_MIPS_KVM (KVM_REG_MIPS | 0x0000000000020000ULL)
#define KVM_REG_MIPS_FPU (KVM_REG_MIPS | 0x0000000000030000ULL)
/*
* KVM_REG_MIPS_GP - General purpose registers from kvm_regs.
*/
#define KVM_REG_MIPS_R0 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 0)
#define KVM_REG_MIPS_R1 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 1)
#define KVM_REG_MIPS_R2 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 2)
#define KVM_REG_MIPS_R3 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 3)
#define KVM_REG_MIPS_R4 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 4)
#define KVM_REG_MIPS_R5 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 5)
#define KVM_REG_MIPS_R6 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 6)
#define KVM_REG_MIPS_R7 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 7)
#define KVM_REG_MIPS_R8 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 8)
#define KVM_REG_MIPS_R9 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 9)
#define KVM_REG_MIPS_R10 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 10)
#define KVM_REG_MIPS_R11 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 11)
#define KVM_REG_MIPS_R12 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 12)
#define KVM_REG_MIPS_R13 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 13)
#define KVM_REG_MIPS_R14 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 14)
#define KVM_REG_MIPS_R15 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 15)
#define KVM_REG_MIPS_R16 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 16)
#define KVM_REG_MIPS_R17 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 17)
#define KVM_REG_MIPS_R18 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 18)
#define KVM_REG_MIPS_R19 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 19)
#define KVM_REG_MIPS_R20 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 20)
#define KVM_REG_MIPS_R21 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 21)
#define KVM_REG_MIPS_R22 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 22)
#define KVM_REG_MIPS_R23 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 23)
#define KVM_REG_MIPS_R24 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 24)
#define KVM_REG_MIPS_R25 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 25)
#define KVM_REG_MIPS_R26 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 26)
#define KVM_REG_MIPS_R27 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 27)
#define KVM_REG_MIPS_R28 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 28)
#define KVM_REG_MIPS_R29 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 29)
#define KVM_REG_MIPS_R30 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 30)
#define KVM_REG_MIPS_R31 (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 31)
#define KVM_REG_MIPS_HI (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 32)
#define KVM_REG_MIPS_LO (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 33)
#define KVM_REG_MIPS_PC (KVM_REG_MIPS_GP | KVM_REG_SIZE_U64 | 34)
/*
* KVM_REG_MIPS_CP0 - Coprocessor 0 registers.
*/
#define KVM_REG_MIPS_MAAR (KVM_REG_MIPS_CP0 | (1 << 8))
#define KVM_REG_MIPS_CP0_MAAR(n) (KVM_REG_MIPS_MAAR | \
KVM_REG_SIZE_U64 | (n))
/*
* KVM_REG_MIPS_KVM - KVM specific control registers.
*/
/*
* CP0_Count control
* DC: Set 0: Master disable CP0_Count and set COUNT_RESUME to now
* Set 1: Master re-enable CP0_Count with unchanged bias, handling timer
* interrupts since COUNT_RESUME
* This can be used to freeze the timer to get a consistent snapshot of
* the CP0_Count and timer interrupt pending state, while also resuming
* safely without losing time or guest timer interrupts.
* Other: Reserved, do not change.
*/
#define KVM_REG_MIPS_COUNT_CTL (KVM_REG_MIPS_KVM | KVM_REG_SIZE_U64 | 0)
#define KVM_REG_MIPS_COUNT_CTL_DC 0x00000001
/*
* CP0_Count resume monotonic nanoseconds
* The monotonic nanosecond time of the last set of COUNT_CTL.DC (master
* disable). Any reads and writes of Count related registers while
* COUNT_CTL.DC=1 will appear to occur at this time. When COUNT_CTL.DC is
* cleared again (master enable) any timer interrupts since this time will be
* emulated.
* Modifications to times in the future are rejected.
*/
#define KVM_REG_MIPS_COUNT_RESUME (KVM_REG_MIPS_KVM | KVM_REG_SIZE_U64 | 1)
/*
* CP0_Count rate in Hz
* Specifies the rate of the CP0_Count timer in Hz. Modifications occur without
* discontinuities in CP0_Count.
*/
#define KVM_REG_MIPS_COUNT_HZ (KVM_REG_MIPS_KVM | KVM_REG_SIZE_U64 | 2)
/*
* KVM_REG_MIPS_FPU - Floating Point and MIPS SIMD Architecture (MSA) registers.
*
* bits[15..8] - Register subset (see definitions below).
* bits[7..5] - Must be zero.
* bits[4..0] - Register number within register subset.
*/
#define KVM_REG_MIPS_FPR (KVM_REG_MIPS_FPU | 0x0000000000000000ULL)
#define KVM_REG_MIPS_FCR (KVM_REG_MIPS_FPU | 0x0000000000000100ULL)
#define KVM_REG_MIPS_MSACR (KVM_REG_MIPS_FPU | 0x0000000000000200ULL)
/*
* KVM_REG_MIPS_FPR - Floating point / Vector registers.
*/
#define KVM_REG_MIPS_FPR_32(n) (KVM_REG_MIPS_FPR | KVM_REG_SIZE_U32 | (n))
#define KVM_REG_MIPS_FPR_64(n) (KVM_REG_MIPS_FPR | KVM_REG_SIZE_U64 | (n))
#define KVM_REG_MIPS_VEC_128(n) (KVM_REG_MIPS_FPR | KVM_REG_SIZE_U128 | (n))
/*
* KVM_REG_MIPS_FCR - Floating point control registers.
*/
#define KVM_REG_MIPS_FCR_IR (KVM_REG_MIPS_FCR | KVM_REG_SIZE_U32 | 0)
#define KVM_REG_MIPS_FCR_CSR (KVM_REG_MIPS_FCR | KVM_REG_SIZE_U32 | 31)
/*
* KVM_REG_MIPS_MSACR - MIPS SIMD Architecture (MSA) control registers.
*/
#define KVM_REG_MIPS_MSA_IR (KVM_REG_MIPS_MSACR | KVM_REG_SIZE_U32 | 0)
#define KVM_REG_MIPS_MSA_CSR (KVM_REG_MIPS_MSACR | KVM_REG_SIZE_U32 | 1)
/*
* KVM MIPS specific structures and definitions
*
*/
struct kvm_debug_exit_arch {
__u64 epc;
};
/* for KVM_SET_GUEST_DEBUG */
struct kvm_guest_debug_arch {
};
/* definition of registers in kvm_run */
struct kvm_sync_regs {
};
/* dummy definition */
struct kvm_sregs {
};
struct kvm_mips_interrupt {
/* in */
__u32 cpu;
__u32 irq;
};
#endif /* __LINUX_KVM_MIPS_H */
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