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acrn-hypervisor/hypervisor/common/hypercall.c

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/*
* Copyright (C) 2018 Intel Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <hypervisor.h>
#include <schedule.h>
#include <hypercall.h>
#include <version.h>
#include <reloc.h>
#define ACRN_DBG_HYCALL 6U
bool is_hypercall_from_ring0(void)
{
uint16_t cs_sel;
bool ret;
cs_sel = exec_vmread16(VMX_GUEST_CS_SEL);
/* cs_selector[1:0] is CPL */
if ((cs_sel & 0x3U) == 0U) {
ret = true;
} else {
ret = false;
}
return ret;
}
/**
* @brief offline vcpu from SOS
*
* The function offline specific vcpu from SOS.
*
* @param vm Pointer to VM data structure
* @param lapicid lapic id of the vcpu which wants to offline
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_sos_offline_cpu(struct acrn_vm *vm, uint64_t lapicid)
{
struct acrn_vcpu *vcpu;
uint16_t i;
int32_t ret = 0;
pr_info("sos offline cpu with lapicid %lld", lapicid);
foreach_vcpu(i, vm, vcpu) {
if (vlapic_get_apicid(vcpu_vlapic(vcpu)) == lapicid) {
/* should not offline BSP */
if (vcpu->vcpu_id == BOOT_CPU_ID) {
ret = -1;
break;
}
pause_vcpu(vcpu, VCPU_ZOMBIE);
reset_vcpu(vcpu);
offline_vcpu(vcpu);
}
}
return ret;
}
/**
* @brief Get hypervisor api version
*
* The function only return api version information when VM is SOS_VM.
*
* @param vm Pointer to VM data structure
* @param param guest physical memory address. The api version returned
* will be copied to this gpa
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_get_api_version(struct acrn_vm *vm, uint64_t param)
{
struct hc_api_version version;
version.major_version = HV_API_MAJOR_VERSION;
version.minor_version = HV_API_MINOR_VERSION;
int32_t ret;
if (copy_to_gpa(vm, &version, param, sizeof(version)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
} else {
ret = 0;
}
return ret;
}
/**
* @brief create virtual machine
*
* Create a virtual machine based on parameter, currently there is no
* limitation for calling times of this function, will add MAX_VM_NUM
* support later.
*
* @param vm Pointer to VM data structure
* @param param guest physical memory address. This gpa points to
* struct acrn_create_vm
*
* @pre Pointer vm shall point to SOS_VM, vm_config != NULL
* @return 0 on success, non-zero on error.
*/
int32_t hcall_create_vm(struct acrn_vm *vm, uint64_t param)
{
uint16_t vm_id;
int32_t ret = -1;
struct acrn_vm *target_vm = NULL;
struct acrn_create_vm cv;
struct acrn_vm_config* vm_config = NULL;
(void)memset((void *)&cv, 0U, sizeof(cv));
if (copy_from_gpa(vm, &cv, param, sizeof(cv)) == 0) {
/* check whether there is a free vm id for use */
/* TODO: pass vm id from DM to make vm_id static */
vm_id = find_free_vm_id();
if (vm_id < CONFIG_MAX_VM_NUM) {
vm_config = get_vm_config(vm_id);
/* TODO: set by DM */
vm_config->type = NORMAL_VM;
vm_config->guest_flags |= cv.vm_flag;
(void)memcpy_s(&vm_config->GUID[0], 16U, &cv.GUID[0], 16U);
ret = create_vm(vm_id, vm_config, &target_vm);
if (ret != 0) {
dev_dbg(ACRN_DBG_HYCALL, "HCALL: Create VM failed");
cv.vmid = ACRN_INVALID_VMID;
ret = -1;
} else {
cv.vmid = target_vm->vm_id;
ret = 0;
}
if (copy_to_gpa(vm, &cv.vmid, param, sizeof(cv.vmid)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
}
}
} else {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
}
return ret;
}
/**
* @brief destroy virtual machine
*
* Destroy a virtual machine, it will pause target VM then shutdown it.
* The function will return -1 if the target VM does not exist.
*
* @param vmid ID of the VM
*
* @return 0 on success, non-zero on error.
*/
int32_t hcall_destroy_vm(uint16_t vmid)
{
int32_t ret;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (target_vm == NULL) {
ret = -1;
} else {
ret = shutdown_vm(target_vm);
}
return ret;
}
/**
* @brief start virtual machine
*
* Start a virtual machine, it will schedule target VM's vcpu to run.
* The function will return -1 if the target VM does not exist or the
* IOReq buffer page for the VM is not ready.
*
* @param vmid ID of the VM
*
* @return 0 on success, non-zero on error.
*/
int32_t hcall_start_vm(uint16_t vmid)
{
int32_t ret = 0;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (target_vm == NULL) {
ret = -1;
} else if (target_vm->sw.io_shared_page == NULL) {
ret = -1;
} else {
start_vm(target_vm);
}
return ret;
}
/**
* @brief pause virtual machine
*
* Pause a virtual machine, if the VM is already paused, the function
* will return 0 directly for success.
* The function will return -1 if the target VM does not exist.
*
* @param vmid ID of the VM
*
* @return 0 on success, non-zero on error.
*/
int32_t hcall_pause_vm(uint16_t vmid)
{
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
int32_t ret;
if (target_vm == NULL) {
ret = -1;
} else {
pause_vm(target_vm);
ret = 0;
}
return ret;
}
/**
* @brief create vcpu
*
* Create a vcpu based on parameter for a VM, it will allocate vcpu from
* freed physical cpus, if there is no available pcpu, the function will
* return -1.
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param param guest physical address. This gpa points to
* struct acrn_create_vcpu
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_create_vcpu(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret;
uint16_t pcpu_id;
struct acrn_create_vcpu cv;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if ((target_vm == NULL) || (param == 0U)) {
ret = -1;
} else if (copy_from_gpa(vm, &cv, param, sizeof(cv)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
} else {
pcpu_id = allocate_pcpu();
if (pcpu_id == INVALID_CPU_ID) {
pr_err("%s: No physical available\n", __func__);
ret = -1;
} else {
ret = prepare_vcpu(target_vm, pcpu_id);
}
}
return ret;
}
/**
* @brief reset virtual machine
*
* Reset a virtual machine, it will make target VM rerun from
* pre-defined entry. Comparing to start vm, this function reset
* each vcpu state and do some initialization for guest.
* The function will return -1 if the target VM does not exist.
*
* @param vmid ID of the VM
*
* @return 0 on success, non-zero on error.
*/
int32_t hcall_reset_vm(uint16_t vmid)
{
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
int32_t ret;
if ((target_vm == NULL) || is_sos_vm(target_vm)) {
ret = -1;
} else {
ret = reset_vm(target_vm);
}
return ret;
}
/**
* @brief set vcpu regs
*
* Set the vcpu regs. It will set the vcpu init regs from DM. Now,
* it's only applied to BSP. AP always uses fixed init regs.
* The function will return -1 if the targat VM or BSP doesn't exist.
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param param guest physical address. This gpa points to
* struct acrn_vcpu_regs
*
* @return 0 on success, non-zero on error.
*/
int32_t hcall_set_vcpu_regs(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
struct acrn_set_vcpu_regs vcpu_regs;
struct acrn_vcpu *vcpu;
int32_t ret;
if ((target_vm == NULL) || (param == 0U) || is_sos_vm(target_vm) || (target_vm->state == VM_STARTED)) {
/* Only allow setup init ctx while target_vm is inactive */
ret = -1;
} else if (copy_from_gpa(vm, &vcpu_regs, param, sizeof(vcpu_regs)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
} else if (vcpu_regs.vcpu_id >= CONFIG_MAX_VCPUS_PER_VM) {
pr_err("%s: invalid vcpu_id for set_vcpu_regs\n", __func__);
ret = -1;
} else {
vcpu = vcpu_from_vid(target_vm, vcpu_regs.vcpu_id);
set_vcpu_regs(vcpu, &(vcpu_regs.vcpu_regs));
ret = 0;
}
return ret;
}
/**
* @brief set or clear IRQ line
*
* Set or clear a virtual IRQ line for a VM, which could be from ISA
* or IOAPIC, normally it triggers an edge IRQ.
* The function will return -1 if the target VM does not exist.
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param ops request command for IRQ set or clear
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_set_irqline(const struct acrn_vm *vm, uint16_t vmid,
const struct acrn_irqline_ops *ops)
{
uint32_t irq_pic;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
int32_t ret;
if (target_vm == NULL) {
ret = -EINVAL;
} else if (ops->gsi >= vioapic_pincount(vm)) {
ret = -EINVAL;
} else {
if (ops->gsi < vpic_pincount()) {
/*
* IRQ line for 8254 timer is connected to
* I/O APIC pin #2 but PIC pin #0,route GSI
* number #2 to PIC IRQ #0.
*/
irq_pic = (ops->gsi == 2U) ? 0U : ops->gsi;
vpic_set_irqline(target_vm, irq_pic, ops->op);
}
/* handle IOAPIC irqline */
vioapic_set_irqline_lock(target_vm, ops->gsi, ops->op);
ret = 0;
}
return ret;
}
static void inject_msi_lapic_pt(struct acrn_vm *vm, const struct acrn_msi_entry *vmsi)
{
union apic_icr icr;
struct acrn_vcpu *vcpu;
union msi_addr_reg vmsi_addr;
union msi_data_reg vmsi_data;
uint64_t vdmask = 0UL;
uint32_t vdest, dest = 0U;
uint16_t vcpu_id;
bool phys;
vmsi_addr.full = vmsi->msi_addr;
vmsi_data.full = (uint32_t)vmsi->msi_data;
dev_dbg(ACRN_DBG_LAPICPT, "%s: msi_addr 0x%016llx, msi_data 0x%016llx",
__func__, vmsi->msi_addr, vmsi->msi_data);
if (vmsi_addr.bits.addr_base == MSI_ADDR_BASE) {
vdest = vmsi_addr.bits.dest_field;
phys = (vmsi_addr.bits.dest_mode == MSI_ADDR_DESTMODE_PHYS);
/*
* calculate all reachable destination vcpu.
* the delivery mode of vmsi will be forwarded to ICR delievry field
* and handled by hardware.
*/
vlapic_calcdest_lapic_pt(vm, &vdmask, vdest, phys);
dev_dbg(ACRN_DBG_LAPICPT, "%s: vcpu destination mask 0x%016llx", __func__, vdmask);
vcpu_id = ffs64(vdmask);
while (vcpu_id != INVALID_BIT_INDEX) {
bitmap_clear_nolock(vcpu_id, &vdmask);
vcpu = vcpu_from_vid(vm, vcpu_id);
dest |= per_cpu(lapic_ldr, vcpu->pcpu_id);
vcpu_id = ffs64(vdmask);
}
icr.value = 0UL;
icr.bits.dest_field = dest;
icr.bits.vector = vmsi_data.bits.vector;
icr.bits.delivery_mode = vmsi_data.bits.delivery_mode;
icr.bits.destination_mode = MSI_ADDR_DESTMODE_LOGICAL;
msr_write(MSR_IA32_EXT_APIC_ICR, icr.value);
dev_dbg(ACRN_DBG_LAPICPT, "%s: icr.value 0x%016llx", __func__, icr.value);
}
}
/**
* @brief inject MSI interrupt
*
* Inject a MSI interrupt for a VM.
* The function will return -1 if the target VM does not exist.
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param param guest physical address. This gpa points to struct acrn_msi_entry
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_inject_msi(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret = -1;
struct acrn_msi_entry msi;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (target_vm != NULL) {
(void)memset((void *)&msi, 0U, sizeof(msi));
if (copy_from_gpa(vm, &msi, param, sizeof(msi)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
} else {
/* For target cpu with lapic pt, send ipi instead of injection via vlapic */
if (is_lapic_pt(target_vm)) {
inject_msi_lapic_pt(target_vm, &msi);
ret = 0;
} else {
ret = vlapic_intr_msi(target_vm, msi.msi_addr, msi.msi_data);
}
}
}
return ret;
}
/**
* @brief set ioreq shared buffer
*
* Set the ioreq share buffer for a VM.
* The function will return -1 if the target VM does not exist.
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param param guest physical address. This gpa points to
* struct acrn_set_ioreq_buffer
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_set_ioreq_buffer(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
uint64_t hpa;
struct acrn_set_ioreq_buffer iobuf;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
uint16_t i;
int32_t ret;
(void)memset((void *)&iobuf, 0U, sizeof(iobuf));
if ((target_vm == NULL) || (copy_from_gpa(vm, &iobuf, param, sizeof(iobuf)) != 0)) {
pr_err("%p %s: target_vm is not valid or Unable copy param to vm\n", target_vm, __func__);
ret = -1;
} else {
dev_dbg(ACRN_DBG_HYCALL, "[%d] SET BUFFER=0x%p",
vmid, iobuf.req_buf);
hpa = gpa2hpa(vm, iobuf.req_buf);
if (hpa == INVALID_HPA) {
pr_err("%s,vm[%hu] gpa 0x%llx,GPA is unmapping.",
__func__, vm->vm_id, iobuf.req_buf);
target_vm->sw.io_shared_page = NULL;
ret = -EINVAL;
} else {
target_vm->sw.io_shared_page = hpa2hva(hpa);
for (i = 0U; i < VHM_REQUEST_MAX; i++) {
set_vhm_req_state(target_vm, i, REQ_STATE_FREE);
}
ret = 0;
}
}
return ret;
}
/**
* @brief notify request done
*
* Notify the requestor VCPU for the completion of an ioreq.
* The function will return -1 if the target VM does not exist.
*
* @param vmid ID of the VM
* @param vcpu_id vcpu ID of the requestor
*
* @return 0 on success, non-zero on error.
*/
int32_t hcall_notify_ioreq_finish(uint16_t vmid, uint16_t vcpu_id)
{
struct acrn_vcpu *vcpu;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
int32_t ret;
/* make sure we have set req_buf */
if ((target_vm == NULL) || (target_vm->sw.io_shared_page == NULL)) {
pr_err("%p %s, invalid parameter\n", target_vm, __func__);
ret = -EINVAL;
} else {
dev_dbg(ACRN_DBG_HYCALL, "[%d] NOTIFY_FINISH for vcpu %d",
vmid, vcpu_id);
if (vcpu_id >= CONFIG_MAX_VCPUS_PER_VM) {
pr_err("%s, failed to get VCPU %d context from VM %d\n",
__func__, vcpu_id, target_vm->vm_id);
ret = -EINVAL;
} else {
vcpu = vcpu_from_vid(target_vm, vcpu_id);
if (!vcpu->vm->sw.is_completion_polling) {
resume_vcpu(vcpu);
}
ret = 0;
}
}
return ret;
}
static int32_t add_vm_memory_region(struct acrn_vm *vm, struct acrn_vm *target_vm,
const struct vm_memory_region *region,uint64_t *pml4_page)
{
int32_t ret;
uint64_t prot;
uint64_t hpa, base_paddr;
hpa = gpa2hpa(vm, region->sos_vm_gpa);
if (hpa == INVALID_HPA) {
pr_err("%s,vm[%hu] gpa 0x%llx,GPA is unmapping.",
__func__, vm->vm_id, region->sos_vm_gpa);
ret = -EINVAL;
} else {
base_paddr = get_hv_image_base();
if (((hpa <= base_paddr) && ((hpa + region->size) > base_paddr)) ||
((hpa >= base_paddr) && (hpa < (base_paddr + CONFIG_HV_RAM_SIZE)))) {
pr_err("%s: overlap the HV memory region.", __func__);
ret = -EFAULT;
} else {
prot = 0UL;
/* access right */
if ((region->prot & MEM_ACCESS_READ) != 0U) {
prot |= EPT_RD;
}
if ((region->prot & MEM_ACCESS_WRITE) != 0U) {
prot |= EPT_WR;
}
if ((region->prot & MEM_ACCESS_EXEC) != 0U) {
prot |= EPT_EXE;
}
/* memory type */
if ((region->prot & MEM_TYPE_WB) != 0U) {
prot |= EPT_WB;
} else if ((region->prot & MEM_TYPE_WT) != 0U) {
prot |= EPT_WT;
} else if ((region->prot & MEM_TYPE_WC) != 0U) {
prot |= EPT_WC;
} else if ((region->prot & MEM_TYPE_WP) != 0U) {
prot |= EPT_WP;
} else {
prot |= EPT_UNCACHED;
}
/* create gpa to hpa EPT mapping */
ept_mr_add(target_vm, pml4_page, hpa,
region->gpa, region->size, prot);
ret = 0;
}
}
return ret;
}
/**
*@pre Pointer vm shall point to SOS_VM
*/
static int32_t set_vm_memory_region(struct acrn_vm *vm,
struct acrn_vm *target_vm, const struct vm_memory_region *region)
{
uint64_t gpa_end;
uint64_t *pml4_page;
int32_t ret;
if ((region->size & (PAGE_SIZE - 1UL)) != 0UL) {
pr_err("%s: [vm%d] map size 0x%x is not page aligned",
__func__, target_vm->vm_id, region->size);
ret = -EINVAL;
} else {
gpa_end = region->gpa + region->size;
if (gpa_end > vm->arch_vm.ept_mem_ops.info->ept.top_address_space) {
pr_err("%s, invalid gpa: 0x%llx, size: 0x%llx, top_address_space: 0x%llx", __func__,
region->gpa, region->size, vm->arch_vm.ept_mem_ops.info->ept.top_address_space);
ret = 0;
} else {
dev_dbg(ACRN_DBG_HYCALL,
"[vm%d] type=%d gpa=0x%x sos_vm_gpa=0x%x size=0x%x",
target_vm->vm_id, region->type, region->gpa,
region->sos_vm_gpa, region->size);
pml4_page = (uint64_t *)target_vm->arch_vm.nworld_eptp;
if (region->type != MR_DEL) {
ret = add_vm_memory_region(vm, target_vm, region, pml4_page);
} else {
ept_mr_del(target_vm, pml4_page,
region->gpa, region->size);
ret = 0;
}
}
}
return ret;
}
/**
* @brief setup ept memory mapping for multi regions
*
* @param vm Pointer to VM data structure
* @param param guest physical address. This gpa points to
* struct set_memmaps
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_set_vm_memory_regions(struct acrn_vm *vm, uint64_t param)
{
struct set_regions regions;
struct vm_memory_region mr;
struct acrn_vm *target_vm;
uint32_t idx;
int32_t ret = 0;
(void)memset((void *)&regions, 0U, sizeof(regions));
if (copy_from_gpa(vm, &regions, param, sizeof(regions)) != 0) {
pr_err("%s: Unable copy param from vm\n", __func__);
ret = -EFAULT;
} else {
target_vm = get_vm_from_vmid(regions.vmid);
if ((target_vm == NULL) || is_sos_vm(target_vm)) {
pr_err("%p %s:target_vm is invalid or Targeting to service vm", target_vm, __func__);
ret = -EFAULT;
} else {
idx = 0U;
while (idx < regions.mr_num) {
if (copy_from_gpa(vm, &mr, regions.regions_gpa + idx * sizeof(mr), sizeof(mr)) != 0) {
pr_err("%s: Copy mr entry fail from vm\n", __func__);
ret = -EFAULT;
break;
}
ret = set_vm_memory_region(vm, target_vm, &mr);
if (ret < 0) {
break;
}
idx++;
}
}
}
return ret;
}
/**
*@pre Pointer vm shall point to SOS_VM
*/
static int32_t write_protect_page(struct acrn_vm *vm,const struct wp_data *wp)
{
uint64_t hpa, base_paddr;
uint64_t prot_set;
uint64_t prot_clr;
int32_t ret;
hpa = gpa2hpa(vm, wp->gpa);
if (hpa == INVALID_HPA) {
pr_err("%s,vm[%hu] gpa 0x%llx,GPA is unmapping.",
__func__, vm->vm_id, wp->gpa);
ret = -EINVAL;
} else {
dev_dbg(ACRN_DBG_HYCALL, "[vm%d] gpa=0x%x hpa=0x%x",
vm->vm_id, wp->gpa, hpa);
base_paddr = get_hv_image_base();
if (((hpa <= base_paddr) && ((hpa + PAGE_SIZE) > base_paddr)) ||
((hpa >= base_paddr) &&
(hpa < (base_paddr + CONFIG_HV_RAM_SIZE)))) {
pr_err("%s: overlap the HV memory region.", __func__);
ret = -EINVAL;
} else {
prot_set = (wp->set != 0U) ? 0UL : EPT_WR;
prot_clr = (wp->set != 0U) ? EPT_WR : 0UL;
ept_mr_modify(vm, (uint64_t *)vm->arch_vm.nworld_eptp,
wp->gpa, PAGE_SIZE, prot_set, prot_clr);
ret = 0;
}
}
return ret;
}
/**
* @brief change guest memory page write permission
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param wp_gpa guest physical address. This gpa points to
* struct wp_data
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_write_protect_page(struct acrn_vm *vm, uint16_t vmid, uint64_t wp_gpa)
{
struct wp_data wp;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
int32_t ret;
if ((target_vm == NULL) || is_sos_vm(target_vm)) {
pr_err("%p %s: target_vm is invalid or Targeting to service vm", target_vm, __func__);
ret = -EINVAL;
} else {
(void)memset((void *)&wp, 0U, sizeof(wp));
if (copy_from_gpa(vm, &wp, wp_gpa, sizeof(wp)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -EFAULT;
} else {
ret = write_protect_page(target_vm, &wp);
}
}
return ret;
}
/**
* @brief translate guest physical address to host physical address
*
* Translate guest physical address to host physical address for a VM.
* The function will return -1 if the target VM does not exist.
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param param guest physical address. This gpa points to struct vm_gpa2hpa
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_gpa_to_hpa(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret;
struct vm_gpa2hpa v_gpa2hpa;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
(void)memset((void *)&v_gpa2hpa, 0U, sizeof(v_gpa2hpa));
if ((target_vm == NULL) || (copy_from_gpa(vm, &v_gpa2hpa, param, sizeof(v_gpa2hpa)) != 0)) {
pr_err("target_vm is invalid or HCALL gpa2hpa: Unable copy param from vm\n");
ret = -1;
} else {
v_gpa2hpa.hpa = gpa2hpa(target_vm, v_gpa2hpa.gpa);
if (v_gpa2hpa.hpa == INVALID_HPA) {
pr_err("%s,vm[%hu] gpa 0x%llx,GPA is unmapping.",
__func__, target_vm->vm_id, v_gpa2hpa.gpa);
ret = -EINVAL;
} else if (copy_to_gpa(vm, &v_gpa2hpa, param, sizeof(v_gpa2hpa)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
} else {
ret = 0;
}
}
return ret;
}
/**
* @brief Assign one passthrough dev to VM.
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param param the physical BDF of the assigning ptdev
* For the compatibility it still can be the guest physical address that
* points to the physical BDF of the assigning ptdev.(Depreciated)
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_assign_ptdev(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret;
uint16_t bdf;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
bool bdf_valid = true;
bool iommu_valid = true;
if (target_vm != NULL) {
if (param < 0x10000UL) {
bdf = (uint16_t) param;
} else {
if (copy_from_gpa(vm, &bdf, param, sizeof(bdf)) != 0) {
pr_err("%s: Unable copy param from vm %d\n",
__func__, vm->vm_id);
bdf_valid = false;
ret = -EIO;
}
}
/* create a iommu domain for target VM if not created */
if (bdf_valid && (target_vm->iommu == NULL)) {
if (target_vm->arch_vm.nworld_eptp == NULL) {
pr_err("%s, EPT of VM not set!\n",
__func__, target_vm->vm_id);
iommu_valid = false;
ret = -EPERM;
} else {
/* TODO: how to get vm's address width? */
target_vm->iommu = create_iommu_domain(vmid,
hva2hpa(target_vm->arch_vm.nworld_eptp), 48U);
if (target_vm->iommu == NULL) {
iommu_valid = false;
ret = -ENODEV;
}
}
}
if (bdf_valid && iommu_valid) {
ret = assign_iommu_device(target_vm->iommu,
(uint8_t)(bdf >> 8U), (uint8_t)(bdf & 0xffU));
}
} else {
pr_err("%s, vm is null\n", __func__);
ret = -EINVAL;
}
return ret;
}
/**
* @brief Deassign one passthrough dev from VM.
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param param the physical BDF of the deassigning ptdev
* To keep the compatibility it still can be the guest physical address that
* points to the physical BDF of the deassigning ptdev.(Depreciated)
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_deassign_ptdev(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret = 0;
uint16_t bdf;
bool bdf_valid = true;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (target_vm == NULL) {
ret = -1;
} else {
if (param < 0x10000UL) {
bdf = (uint16_t) param;
} else {
if (copy_from_gpa(vm, &bdf, param, sizeof(bdf)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
bdf_valid = false;
ret = -1;
}
}
if (bdf_valid) {
ret = unassign_iommu_device(target_vm->iommu,
(uint8_t)(bdf >> 8U), (uint8_t)(bdf & 0xffU));
}
}
return ret;
}
/**
* @brief Set interrupt mapping info of ptdev.
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param param guest physical address. This gpa points to data structure of
* hc_ptdev_irq including intr remapping info
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_set_ptdev_intr_info(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret;
struct hc_ptdev_irq irq;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
(void)memset((void *)&irq, 0U, sizeof(irq));
if (target_vm == NULL) {
ret = -1;
} else if (copy_from_gpa(vm, &irq, param, sizeof(irq)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
} else {
/* Inform vPCI about the interupt info changes */
#ifndef CONFIG_PARTITION_MODE
vpci_set_ptdev_intr_info(target_vm, irq.virt_bdf, irq.phys_bdf);
#endif
if (irq.type == IRQ_INTX) {
ret = ptirq_add_intx_remapping(target_vm, irq.is.intx.virt_pin,
irq.is.intx.phys_pin, irq.is.intx.pic_pin);
} else if ((irq.type == IRQ_MSI) || (irq.type == IRQ_MSIX)) {
ret = ptirq_add_msix_remapping(target_vm,
irq.virt_bdf, irq.phys_bdf,
irq.is.msix.vector_cnt);
} else {
pr_err("%s: Invalid irq type: %u\n", __func__, irq.type);
ret = -1;
}
}
return ret;
}
/**
* @brief Clear interrupt mapping info of ptdev.
*
* @param vm Pointer to VM data structure
* @param vmid ID of the VM
* @param param guest physical address. This gpa points to data structure of
* hc_ptdev_irq including intr remapping info
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t
hcall_reset_ptdev_intr_info(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret = 0;
struct hc_ptdev_irq irq;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (target_vm != NULL) {
(void)memset((void *)&irq, 0U, sizeof(irq));
if (copy_from_gpa(vm, &irq, param, sizeof(irq)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
} else if (irq.type == IRQ_INTX) {
ptirq_remove_intx_remapping(target_vm,
irq.is.intx.virt_pin,
irq.is.intx.pic_pin);
} else if ((irq.type == IRQ_MSI) || (irq.type == IRQ_MSIX)) {
/*
* Inform vPCI about the interupt info changes
* TODO: Need to add bdf info for IRQ_INTX type in devicemodel
*/
#ifndef CONFIG_PARTITION_MODE
vpci_reset_ptdev_intr_info(target_vm, irq.virt_bdf, irq.phys_bdf);
#endif
ptirq_remove_msix_remapping(target_vm,
irq.virt_bdf,
irq.is.msix.vector_cnt);
} else {
pr_err("%s: Invalid irq type: %u\n", __func__, irq.type);
ret = -1;
}
} else {
ret = -1;
}
return ret;
}
/**
* @brief Get VCPU Power state.
*
* @param vm pointer to VM data structure
* @param cmd cmd to show get which VCPU power state data
* @param param VCPU power state data
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_get_cpu_pm_state(struct acrn_vm *vm, uint64_t cmd, uint64_t param)
{
uint16_t target_vm_id;
struct acrn_vm *target_vm;
int32_t ret;
target_vm_id = (uint16_t)((cmd & PMCMD_VMID_MASK) >> PMCMD_VMID_SHIFT);
target_vm = get_vm_from_vmid(target_vm_id);
if (target_vm == NULL) {
ret = -1;
} else {
switch (cmd & PMCMD_TYPE_MASK) {
case PMCMD_GET_PX_CNT: {
if (target_vm->pm.px_cnt == 0U) {
ret = -1;
} else if (copy_to_gpa(vm, &(target_vm->pm.px_cnt), param,
sizeof(target_vm->pm.px_cnt)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
} else {
ret = 0;
}
break;
}
case PMCMD_GET_PX_DATA: {
uint8_t pn;
struct cpu_px_data *px_data;
/* For now we put px data as per-vm,
* If it is stored as per-cpu in the future,
* we need to check PMCMD_VCPUID_MASK in cmd.
*/
if (target_vm->pm.px_cnt == 0U) {
ret = -1;
break;
}
pn = (uint8_t)((cmd & PMCMD_STATE_NUM_MASK) >> PMCMD_STATE_NUM_SHIFT);
if (pn >= target_vm->pm.px_cnt) {
ret = -1;
break;
}
px_data = target_vm->pm.px_data + pn;
if (copy_to_gpa(vm, px_data, param,
sizeof(struct cpu_px_data)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
break;
}
ret = 0;
break;
}
case PMCMD_GET_CX_CNT: {
if (target_vm->pm.cx_cnt == 0U) {
ret = -1;
} else if (copy_to_gpa(vm, &(target_vm->pm.cx_cnt), param,
sizeof(target_vm->pm.cx_cnt)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
} else {
ret = 0;
}
break;
}
case PMCMD_GET_CX_DATA: {
uint8_t cx_idx;
struct cpu_cx_data *cx_data;
if (target_vm->pm.cx_cnt == 0U) {
ret = -1;
break;
}
cx_idx = (uint8_t)
((cmd & PMCMD_STATE_NUM_MASK) >> PMCMD_STATE_NUM_SHIFT);
if ((cx_idx == 0U) || (cx_idx > target_vm->pm.cx_cnt)) {
ret = -1;
break;
}
cx_data = target_vm->pm.cx_data + cx_idx;
if (copy_to_gpa(vm, cx_data, param,
sizeof(struct cpu_cx_data)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
break;
}
ret = 0;
break;
}
default:
ret = -1;
break;
}
}
return ret;
}
/**
* @brief Get VCPU a VM's interrupt count data.
*
* @param vm pointer to VM data structure
* @param vmid id of the VM
* @param param guest physical address. This gpa points to data structure of
* acrn_intr_monitor
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_vm_intr_monitor(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t status = -EINVAL;
struct acrn_intr_monitor *intr_hdr;
uint64_t hpa;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (target_vm != NULL) {
/* the param for this hypercall is page aligned */
hpa = gpa2hpa(vm, param);
if (hpa != INVALID_HPA) {
intr_hdr = (struct acrn_intr_monitor *)hpa2hva(hpa);
stac();
if (intr_hdr->buf_cnt <= (MAX_PTDEV_NUM * 2U)) {
switch (intr_hdr->cmd) {
case INTR_CMD_GET_DATA:
intr_hdr->buf_cnt = ptirq_get_intr_data(target_vm,
intr_hdr->buffer, intr_hdr->buf_cnt);
break;
case INTR_CMD_DELAY_INT:
/* buffer[0] is the delay time (in MS), if 0 to cancel delay */
target_vm->intr_inject_delay_delta =
intr_hdr->buffer[0] * CYCLES_PER_MS;
break;
default:
/* if cmd wrong it goes here should not happen */
break;
}
status = 0;
pr_dbg("intr monitor:%d, cnt=%d", intr_hdr->cmd, intr_hdr->buf_cnt);
}
clac();
}
}
return status;
}
/**
* @brief set upcall notifier vector
*
* This is the API that helps to switch the notifer vecotr. If this API is
* not called, the hypervisor will use the default notifier vector(0xF3)
* to notify the SOS kernel.
*
* @param vm Pointer to VM data structure
* @param param the expected notifier vector from guest
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_set_callback_vector(const struct acrn_vm *vm, uint64_t param)
{
int32_t ret;
if (!is_sos_vm(vm)) {
pr_err("%s: Targeting to service vm", __func__);
ret = -EPERM;
} else if ((param > NR_MAX_VECTOR) || (param < VECTOR_DYNAMIC_START)) {
pr_err("%s: Invalid passed vector\n");
ret = -EINVAL;
} else {
set_vhm_vector((uint32_t)param);
ret = 0;
}
return ret;
}
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