int arch_vcpu_deinit(struct vmm_vcpu *vcpu)
{
virtual_addr_t sp_exec =
riscv_regs(vcpu)->sp_exec - CONFIG_IRQ_STACK_SIZE;
/* TODO: For Normal VCPUs */
/* For both Orphan & Normal VCPUs */
/* Free-up excepiton stack */
vmm_pagepool_free(VMM_PAGEPOOL_NORMAL, sp_exec,
VMM_SIZE_TO_PAGE(CONFIG_IRQ_STACK_SIZE));
/* Clear arch registers */
memset(riscv_regs(vcpu), 0, sizeof(arch_regs_t));
return VMM_OK;
}
int arch_vcpu_init(struct vmm_vcpu *vcpu)
{
int rc = VMM_OK;
const char *attr;
virtual_addr_t sp_exec;
/* First time allocate exception stack */
if (!vcpu->reset_count) {
sp_exec = vmm_pagepool_alloc(VMM_PAGEPOOL_NORMAL,
VMM_SIZE_TO_PAGE(CONFIG_IRQ_STACK_SIZE));
if (!sp_exec) {
return VMM_ENOMEM;
}
sp_exec += CONFIG_IRQ_STACK_SIZE;
} else {
sp_exec = riscv_regs(vcpu)->sp_exec;
}
/* For both Orphan & Normal VCPUs */
memset(riscv_regs(vcpu), 0, sizeof(arch_regs_t));
riscv_regs(vcpu)->sepc = vcpu->start_pc;
riscv_regs(vcpu)->sstatus = SSTATUS_SPP | SSTATUS_SPIE; /* TODO: */
riscv_regs(vcpu)->sp = vcpu->stack_va +
(vcpu->stack_sz - ARCH_CACHE_LINE_SIZE);
riscv_regs(vcpu)->sp = riscv_regs(vcpu)->sp & ~0x7;
riscv_regs(vcpu)->sp_exec = sp_exec;
riscv_regs(vcpu)->hstatus = 0;
/* For Orphan VCPUs we are done */
if (!vcpu->is_normal) {
return VMM_OK;
}
/* Following initialization for normal VCPUs only */
rc = vmm_devtree_read_string(vcpu->node,
VMM_DEVTREE_COMPATIBLE_ATTR_NAME, &attr);
if (rc) {
goto done;
}
#if __riscv_xlen == 64
if (strcmp(attr, "riscv64,generic") != 0) {
#elif __riscv_xlen == 32
if (strcmp(attr, "riscv32,generic") != 0) {
#else
#error "Unexpected __riscv_xlen"
#endif
rc = VMM_EINVALID;
goto done;
}
/* Update HSTATUS */
riscv_regs(vcpu)->hstatus |= HSTATUS_SP2V;
riscv_regs(vcpu)->hstatus |= HSTATUS_SP2P;
riscv_regs(vcpu)->hstatus |= HSTATUS_SPV;
/* First time initialization of private context */
if (!vcpu->reset_count) {
/* Alloc private context */
vcpu->arch_priv = vmm_zalloc(sizeof(struct riscv_priv));
if (!vcpu->arch_priv) {
rc = VMM_ENOMEM;
goto done;
}
}
/* Update BS<xyz> */
riscv_priv(vcpu)->bsstatus = 0; /* TODO: ??? */
riscv_priv(vcpu)->bsie = 0;
riscv_priv(vcpu)->bstvec = 0;
riscv_priv(vcpu)->bsscratch = 0;
riscv_priv(vcpu)->bsepc = 0;
riscv_priv(vcpu)->bscause = 0;
riscv_priv(vcpu)->bstval = 0;
riscv_priv(vcpu)->bsip = 0;
riscv_priv(vcpu)->bsatp = 0;
/* Update HIDELEG */
riscv_priv(vcpu)->hideleg = 0;
riscv_priv(vcpu)->hideleg |= SIP_SSIP;
riscv_priv(vcpu)->hideleg |= SIP_STIP;
riscv_priv(vcpu)->hideleg |= SIP_SEIP;
/* Update HEDELEG */
riscv_priv(vcpu)->hedeleg = 0;
riscv_priv(vcpu)->hedeleg |= (1U << CAUSE_MISALIGNED_FETCH);
riscv_priv(vcpu)->hedeleg |= (1U << CAUSE_BREAKPOINT);
riscv_priv(vcpu)->hedeleg |= (1U << CAUSE_USER_ECALL);
riscv_priv(vcpu)->hedeleg |= (1U << CAUSE_FETCH_PAGE_FAULT);
riscv_priv(vcpu)->hedeleg |= (1U << CAUSE_LOAD_PAGE_FAULT);
riscv_priv(vcpu)->hedeleg |= (1U << CAUSE_STORE_PAGE_FAULT);
done:
return rc;
}
int arch_vcpu_deinit(struct vmm_vcpu *vcpu)
{
virtual_addr_t sp_exec =
riscv_regs(vcpu)->sp_exec - CONFIG_IRQ_STACK_SIZE;
/* For both Orphan & Normal VCPUs */
/* Free-up excepiton stack */
vmm_pagepool_free(VMM_PAGEPOOL_NORMAL, sp_exec,
VMM_SIZE_TO_PAGE(CONFIG_IRQ_STACK_SIZE));
/* Clear arch registers */
memset(riscv_regs(vcpu), 0, sizeof(arch_regs_t));
/* For Orphan VCPUs do nothing else */
if (!vcpu->is_normal) {
return VMM_OK;
}
/* Free private context */
vmm_free(vcpu->arch_priv);
vcpu->arch_priv = NULL;
return VMM_OK;
}