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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2015 Mihai Carabas <mihai.carabas@gmail.com>
* Copyright (c) 2024 Ruslan Bukin <br@bsdpad.com>
*
* This software was developed by the University of Cambridge Computer
* Laboratory (Department of Computer Science and Technology) under Innovate
* UK project 105694, "Digital Security by Design (DSbD) Technology Platform
* Prototype".
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _VMM_RISCV_H_
#define _VMM_RISCV_H_
#include <machine/reg.h>
#include <machine/pcpu.h>
#include <machine/vmm.h>
#include <riscv/vmm/vmm_vtimer.h>
struct hypregs {
uint64_t hyp_ra;
uint64_t hyp_sp;
uint64_t hyp_gp;
uint64_t hyp_tp;
uint64_t hyp_t[7];
uint64_t hyp_s[12];
uint64_t hyp_a[8];
uint64_t hyp_sepc;
uint64_t hyp_sstatus;
uint64_t hyp_hstatus;
};
struct hypcsr {
uint64_t hvip;
uint64_t vsstatus;
uint64_t vsie;
uint64_t vstvec;
uint64_t vsscratch;
uint64_t vsepc;
uint64_t vscause;
uint64_t vstval;
uint64_t vsatp;
uint64_t scounteren;
uint64_t senvcfg;
};
enum vmm_fence_type {
VMM_RISCV_FENCE_INVALID = 0,
VMM_RISCV_FENCE_I,
VMM_RISCV_FENCE_VMA,
VMM_RISCV_FENCE_VMA_ASID,
};
struct vmm_fence {
enum vmm_fence_type type;
size_t start;
size_t size;
uint64_t asid;
};
struct hypctx {
struct hypregs host_regs;
struct hypregs guest_regs;
struct hypcsr guest_csrs;
uint64_t host_sscratch;
uint64_t host_stvec;
uint64_t host_scounteren;
uint64_t guest_scounteren;
struct hyp *hyp;
struct vcpu *vcpu;
bool has_exception;
int cpu_id;
int ipi_pending;
int interrupts_pending;
struct vtimer vtimer;
struct vmm_fence *fence_queue;
struct mtx fence_queue_mtx;
int fence_queue_head;
int fence_queue_tail;
#define FENCE_REQ_I (1 << 0)
#define FENCE_REQ_VMA (1 << 1)
int fence_req;
};
struct hyp {
struct vm *vm;
uint64_t vmid_generation;
bool aplic_attached;
struct aplic *aplic;
struct hypctx *ctx[];
};
struct hyptrap {
uint64_t sepc;
uint64_t scause;
uint64_t stval;
uint64_t htval;
uint64_t htinst;
};
#define dprintf(fmt, ...)
struct hypctx *riscv_get_active_vcpu(void);
void vmm_switch(struct hypctx *);
void vmm_unpriv_trap(struct hyptrap *, uint64_t tmp);
bool vmm_sbi_ecall(struct vcpu *);
void riscv_send_ipi(struct hyp *hyp, cpuset_t *cpus);
int riscv_check_ipi(struct hypctx *hypctx, bool clear);
bool riscv_check_interrupts_pending(struct hypctx *hypctx);
#endif /* !_VMM_RISCV_H_ */
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