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f67ac09141
acrn-hypervisor/hypervisor/common/hypercall.c
Sainath Grandhi f67ac09141 hv: Handle holes in GSI i.e. Global System Interrupt for multiple IO-APICs 
MADT is used to specify the GSI base for each IO-APIC and the number of
interrupt pins per IO-APIC is programmed into Max. Redir. Entry register of
that IO-APIC.

On platforms with multiple IO-APICs, there can be holes in the GSI space.
For example, on a platform with 2 IO-APICs, the following configuration has
a hole (from 24 to 31) in the GSI space.

IO-APIC 1: GSI base - 0, number of pins - 24
IO-APIC 2: GSI base - 32, number of pins - 8

This patch also adjusts the size for variables used to represent the total
number of IO-APICs on the system from uint16_t to uint8_t as the ACPI MADT
uses only 8-bits to indicate the unique IO-APIC IDs.

Tracked-On: #4151
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
Acked-by: Eddie Dong <eddie.dong@Intel.com>
2020-03-25 09:36:18 +08:00

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/*
* Copyright (C) 2018 Intel Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <vm.h>
#include <vmx.h>
#include <schedule.h>
#include <version.h>
#include <reloc.h>
#include <vtd.h>
#include <per_cpu.h>
#include <lapic.h>
#include <assign.h>
#include <ept.h>
#include <mmu.h>
#include <hypercall.h>
#include <errno.h>
#include <logmsg.h>
#include <ioapic.h>
#define DBG_LEVEL_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 %ld", lapicid);
foreach_vcpu(i, vm, vcpu) {
if (vlapic_get_apicid(vcpu_vlapic(vcpu)) == lapicid) {
/* should not offline BSP */
if (vcpu->vcpu_id == BSP_CPU_ID) {
ret = -1;
break;
}
pause_vcpu(vcpu, VCPU_ZOMBIE);
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 Get basic platform information.
*
* The function returns basic hardware or configuration information
* for the current platform.
*
* @param vm Pointer to VM data structure.
* @param param GPA pointer to struct hc_platform_info.
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, -1 in case of error.
*/
int32_t hcall_get_platform_info(struct acrn_vm *vm, uint64_t param)
{
int32_t ret = 0;
struct hc_platform_info platform_info;
platform_info.cpu_num = get_pcpu_nums();
platform_info.max_vcpus_per_vm = MAX_VCPUS_PER_VM;
platform_info.max_kata_containers = CONFIG_MAX_KATA_VM_NUM;
if (copy_to_gpa(vm, &platform_info, param, sizeof(platform_info)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
ret = -1;
}
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;
if (copy_from_gpa(vm, &cv, param, sizeof(cv)) == 0) {
vm_id = get_vmid_by_uuid(&cv.uuid[0]);
if ((vm_id > vm->vm_id) && (vm_id < CONFIG_MAX_VM_NUM)
&& (is_poweroff_vm(get_vm_from_vmid(vm_id)))) {
vm_config = get_vm_config(vm_id);
/* Filter out the bits should not set by DM and then assign it to guest_flags */
vm_config->guest_flags |= (cv.vm_flag & DM_OWNED_GUEST_FLAG_MASK);
/* GUEST_FLAG_RT must be set if we have GUEST_FLAG_LAPIC_PASSTHROUGH set in guest_flags */
if (((vm_config->guest_flags & GUEST_FLAG_LAPIC_PASSTHROUGH) != 0U)
&& ((vm_config->guest_flags & GUEST_FLAG_RT) == 0U)) {
pr_err("Wrong guest flags 0x%lx\n", vm_config->guest_flags);
ret = -1;
} else {
ret = create_vm(vm_id, vm_config, &target_vm);
if (ret != 0) {
dev_dbg(DBG_LEVEL_HYCALL, "HCALL: Create VM failed");
cv.vmid = ACRN_INVALID_VMID;
ret = -1;
} else {
/* return a relative vm_id from SOS view */
cv.vmid = vmid_2_rel_vmid(vm->vm_id, vm_id);
cv.vcpu_num = vm_config->vcpu_num;
ret = 0;
}
if (copy_to_gpa(vm, &cv, param, sizeof(cv)) != 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 = -1;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
/* TODO: check target_vm guest_flags */
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 = -1;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if ((is_created_vm(target_vm)) && (is_postlaunched_vm(target_vm)) && (target_vm->sw.io_shared_page != NULL)) {
/* TODO: check target_vm guest_flags */
start_vm(target_vm);
ret = 0;
}
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 = -1;
if (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
/* TODO: check target_vm guest_flags */
pause_vm(target_vm);
ret = 0;
}
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 = -1;
if (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
/* TODO: check target_vm guest_flags */
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
*
* @pre Pointer vm shall point to SOS_VM
* @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 = -1;
/* Only allow setup init ctx while target_vm is inactive */
if ((!is_poweroff_vm(target_vm)) && (param != 0U) && (is_postlaunched_vm(target_vm)) &&
(target_vm->state != VM_RUNNING)) {
if (copy_from_gpa(vm, &vcpu_regs, param, sizeof(vcpu_regs)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
} else if (vcpu_regs.vcpu_id >= MAX_VCPUS_PER_VM) {
pr_err("%s: invalid vcpu_id for set_vcpu_regs\n", __func__);
} else {
vcpu = vcpu_from_vid(target_vm, vcpu_regs.vcpu_id);
if (vcpu->state != VCPU_OFFLINE) {
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 = -1;
if (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
if (ops->gsi < vioapic_pincount(vm)) {
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(vm_pic(target_vm), irq_pic, ops->op);
}
/* handle IOAPIC irqline */
vioapic_set_irqline_lock(target_vm, ops->gsi, ops->op);
ret = 0;
}
}
return ret;
}
/**
*@pre Pointer vm shall point to SOS_VM
*/
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(DBG_LEVEL_LAPICPT, "%s: msi_addr 0x%016lx, msi_data 0x%016lx",
__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_calc_dest_lapic_pt(vm, &vdmask, false, vdest, phys);
dev_dbg(DBG_LEVEL_LAPICPT, "%s: vcpu destination mask 0x%016lx", __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, pcpuid_from_vcpu(vcpu));
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(DBG_LEVEL_LAPICPT, "%s: icr.value 0x%016lx", __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_vm *target_vm = get_vm_from_vmid(vmid);
if (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
struct acrn_msi_entry msi;
if (copy_from_gpa(vm, &msi, param, sizeof(msi)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
} else {
/* For target cpu with lapic pt, send ipi instead of injection via vlapic */
if (is_lapic_pt_configured(target_vm)) {
enum vm_vlapic_state vlapic_state = check_vm_vlapic_state(target_vm);
if (vlapic_state == VM_VLAPIC_X2APIC) {
/*
* All the vCPUs of VM are in x2APIC mode and LAPIC is PT
* Inject the vMSI as an IPI directly to VM
*/
inject_msi_lapic_pt(target_vm, &msi);
ret = 0;
} else if (vlapic_state == VM_VLAPIC_XAPIC) {
/*
* All the vCPUs of VM are in xAPIC and use vLAPIC
* Inject using vLAPIC
*/
ret = vlapic_intr_msi(target_vm, msi.msi_addr, msi.msi_data);
} else {
/*
* For cases VM_VLAPIC_DISABLED and VM_VLAPIC_TRANSITION
* Silently drop interrupt
*/
}
} 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_vm *target_vm = get_vm_from_vmid(vmid);
uint16_t i;
int32_t ret = -1;
if (is_created_vm(target_vm) && is_postlaunched_vm(target_vm)) {
struct acrn_set_ioreq_buffer iobuf;
if (copy_from_gpa(vm, &iobuf, param, sizeof(iobuf)) != 0) {
pr_err("%p %s: Unable copy param to vm\n", target_vm, __func__);
} else {
dev_dbg(DBG_LEVEL_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%lx,GPA is unmapping.",
__func__, vm->vm_id, iobuf.req_buf);
target_vm->sw.io_shared_page = NULL;
} 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 = -1;
/* make sure we have set req_buf */
if ((!is_poweroff_vm(target_vm)) && (is_postlaunched_vm(target_vm)) && (target_vm->sw.io_shared_page != NULL)) {
dev_dbg(DBG_LEVEL_HYCALL, "[%d] NOTIFY_FINISH for vcpu %d",
vmid, vcpu_id);
if (vcpu_id >= target_vm->hw.created_vcpus) {
pr_err("%s, failed to get VCPU %d context from VM %d\n",
__func__, vcpu_id, target_vm->vm_id);
} else {
vcpu = vcpu_from_vid(target_vm, vcpu_id);
if (!vcpu->vm->sw.is_polling_ioreq) {
signal_event(&vcpu->events[VCPU_EVENT_IOREQ]);
}
ret = 0;
}
}
return ret;
}
/**
*@pre Pointer vm shall point to SOS_VM
*/
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%lx,GPA is unmapping.",
__func__, vm->vm_id, region->sos_vm_gpa);
ret = -EINVAL;
} else {
base_paddr = hva2hpa((void *)(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_add_mr(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 *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 {
if (!ept_is_mr_valid(target_vm, region->gpa, region->size)) {
pr_err("%s, invalid gpa: 0x%lx, size: 0x%lx, top_address_space: 0x%lx", __func__,
region->gpa, region->size,
target_vm->arch_vm.ept_mem_ops.info->ept.top_address_space);
ret = 0;
} else {
dev_dbg(DBG_LEVEL_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_del_mr(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 = NULL;
uint32_t idx;
int32_t ret = -1;
if (copy_from_gpa(vm, &regions, param, sizeof(regions)) == 0) {
/* the vmid in regions is a relative vm id, need to convert to absolute vm id */
uint16_t target_vmid = rel_vmid_2_vmid(vm->vm_id, regions.vmid);
if (target_vmid < CONFIG_MAX_VM_NUM) {
target_vm = get_vm_from_vmid(target_vmid);
}
if ((target_vm != NULL) && !is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
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__);
break;
}
ret = set_vm_memory_region(vm, target_vm, &mr);
if (ret < 0) {
break;
}
idx++;
}
} else {
pr_err("%p %s:target_vm is invalid or Targeting to service vm", target_vm, __func__);
}
}
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 = -EINVAL;
if ((!mem_aligned_check(wp->gpa, PAGE_SIZE)) ||
(!ept_is_mr_valid(vm, wp->gpa, PAGE_SIZE))) {
pr_err("%s,vm[%hu] gpa 0x%lx,GPA is invalid or not page size aligned.",
__func__, vm->vm_id, wp->gpa);
} else {
hpa = gpa2hpa(vm, wp->gpa);
if (hpa == INVALID_HPA) {
pr_err("%s,vm[%hu] gpa 0x%lx,GPA is unmapping.",
__func__, vm->vm_id, wp->gpa);
} else {
dev_dbg(DBG_LEVEL_HYCALL, "[vm%d] gpa=0x%x hpa=0x%x",
vm->vm_id, wp->gpa, hpa);
base_paddr = hva2hpa((void *)(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__);
} else {
prot_set = (wp->set != 0U) ? 0UL : EPT_WR;
prot_clr = (wp->set != 0U) ? EPT_WR : 0UL;
ept_modify_mr(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 acrn_vm *target_vm = get_vm_from_vmid(vmid);
int32_t ret = -1;
if (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
struct wp_data wp;
if (copy_from_gpa(vm, &wp, wp_gpa, sizeof(wp)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
} else {
ret = write_protect_page(target_vm, &wp);
}
} else {
pr_err("%p %s: target_vm is invalid", target_vm, __func__);
}
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 = -1;
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 (!is_poweroff_vm(target_vm) && (!is_prelaunched_vm(target_vm))
&& (copy_from_gpa(vm, &v_gpa2hpa, param, sizeof(v_gpa2hpa)) == 0)) {
v_gpa2hpa.hpa = gpa2hpa(target_vm, v_gpa2hpa.gpa);
if (v_gpa2hpa.hpa == INVALID_HPA) {
pr_err("%s,vm[%hu] gpa 0x%lx,GPA is unmapping.",
__func__, target_vm->vm_id, v_gpa2hpa.gpa);
} else if (copy_to_gpa(vm, &v_gpa2hpa, param, sizeof(v_gpa2hpa)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
} else {
ret = 0;
}
} else {
pr_err("target_vm is invalid or HCALL gpa2hpa: Unable copy param from vm\n");
}
return ret;
}
/**
* @brief Assign one PCI dev to a VM.
*
* @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_assign_pcidev including assign PCI device info
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_assign_pcidev(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret = -EINVAL;
struct acrn_assign_pcidev pcidev;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
if (copy_from_gpa(vm, &pcidev, param, sizeof(pcidev)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
} else {
ret = vpci_assign_pcidev(target_vm, &pcidev);
}
} else {
pr_err("%s, vm[%d] is invalid\n", __func__, vm->vm_id);
}
return ret;
}
/**
* @brief Deassign one PCI dev from a VM.
*
* @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_assign_pcidev including deassign PCI device info
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_deassign_pcidev(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret = -EINVAL;
struct acrn_assign_pcidev pcidev;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
if (copy_from_gpa(vm, &pcidev, param, sizeof(pcidev)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
} else {
ret = vpci_deassign_pcidev(target_vm, &pcidev);
}
} else {
pr_err("%s, vm[%d] is invalid\n", __func__, vm->vm_id);
}
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 = -1;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
struct hc_ptdev_irq irq;
if (copy_from_gpa(vm, &irq, param, sizeof(irq)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
} else {
if (irq.type == IRQ_INTX) {
struct pci_vdev *vdev;
union pci_bdf bdf = {.value = irq.virt_bdf};
struct acrn_vpci *vpci = &target_vm->vpci;
spinlock_obtain(&vpci->lock);
vdev = pci_find_vdev(vpci, bdf);
spinlock_release(&vpci->lock);
if ((vdev != NULL) && (vdev->pdev->bdf.value == irq.phys_bdf)) {
if ((((!irq.intx.pic_pin) && (irq.intx.virt_pin < vioapic_pincount(target_vm))) ||
((irq.intx.pic_pin) && (irq.intx.virt_pin < vpic_pincount()))) &&
is_gsi_valid(irq.intx.phys_pin)) {
ret = ptirq_add_intx_remapping(target_vm, irq.intx.virt_pin,
irq.intx.phys_pin, irq.intx.pic_pin);
} else {
pr_err("%s: Invalid phys pin or virt pin\n", __func__);
}
}
} else {
pr_err("%s: Invalid irq type: %u\n", __func__, irq.type);
}
}
}
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 = -1;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
if (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
struct hc_ptdev_irq irq;
if (copy_from_gpa(vm, &irq, param, sizeof(irq)) != 0) {
pr_err("%s: Unable copy param to vm\n", __func__);
} else {
if (irq.type == IRQ_INTX) {
struct pci_vdev *vdev;
union pci_bdf bdf = {.value = irq.virt_bdf};
struct acrn_vpci *vpci = &target_vm->vpci;
spinlock_obtain(&vpci->lock);
vdev = pci_find_vdev(vpci, bdf);
spinlock_release(&vpci->lock);
if ((vdev != NULL) && (vdev->pdev->bdf.value == irq.phys_bdf)) {
if (((!irq.intx.pic_pin) && (irq.intx.virt_pin < vioapic_pincount(target_vm))) ||
((irq.intx.pic_pin) && (irq.intx.virt_pin < vpic_pincount()))) {
ptirq_remove_intx_remapping(target_vm, irq.intx.virt_pin, irq.intx.pic_pin);
ret = 0;
} else {
pr_err("%s: Invalid virt pin\n", __func__);
}
}
} else {
pr_err("%s: Invalid irq type: %u\n", __func__, irq.type);
}
}
}
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 = NULL;
int32_t ret = -1;
/* the vmid in cmd is a relative vm id, need to convert to absolute vm id */
target_vm_id = rel_vmid_2_vmid(vm->vm_id, (uint16_t)((cmd & PMCMD_VMID_MASK) >> PMCMD_VMID_SHIFT));
if (target_vm_id < CONFIG_MAX_VM_NUM) {
target_vm = get_vm_from_vmid(target_vm_id);
}
if ((target_vm != NULL) && (!is_poweroff_vm(target_vm)) && (is_postlaunched_vm(target_vm))) {
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 (!is_poweroff_vm(target_vm) && is_postlaunched_vm(target_vm)) {
/* 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;
}
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", __func__);
ret = -EINVAL;
} else {
set_vhm_notification_vector((uint32_t)param);
ret = 0;
}
return ret;
}
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