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hv: mmio_dev: add hypercall to support mmio device pass through

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Add two hypercalls to support MMIO device pass through for post-launched VM.
And when we support MMIO pass through for pre-launched VM, we could re-use
the code in mmio_dev.c

Tracked-On: #5053
Signed-off-by: Li Fei1 <fei1.li@intel.com>
This commit is contained in:
Li Fei1
2020-07-16 13:45:06 +08:00
committed by wenlingz
parent 5034087a4f
commit baf77a79ad
7 changed files with 184 additions and 0 deletions
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65
hypervisor/common/hypercall.c
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@@ -19,6 +19,7 @@
#include <errno.h>
#include <logmsg.h>
#include <ioapic.h>
#include <mmio_dev.h>
#define DBG_LEVEL_HYCALL 6U
@@ -893,6 +894,70 @@ int32_t hcall_deassign_pcidev(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
return ret;
}
/**
* @brief Assign one MMIO 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_mmiodev including assign MMIO device info
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_assign_mmiodev(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret = -EINVAL;
struct acrn_mmiodev mmiodev;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
/* We should only assign a device to a post-launched VM at creating time for safety, not runtime or other cases*/
if (is_created_vm(target_vm) && is_postlaunched_vm(target_vm)) {
if (copy_from_gpa(vm, &mmiodev, param, sizeof(mmiodev)) == 0) {
ret = deassign_mmio_dev(vm, &mmiodev);
if (ret == 0) {
ret = assign_mmio_dev(target_vm, &mmiodev);
}
}
} else {
pr_err("vm[%d] %s failed!\n",target_vm->vm_id, __func__);
}
return ret;
}
/**
* @brief Deassign one MMIO 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_mmiodev including deassign MMIO device info
*
* @pre Pointer vm shall point to SOS_VM
* @return 0 on success, non-zero on error.
*/
int32_t hcall_deassign_mmiodev(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
{
int32_t ret = -EINVAL;
struct acrn_mmiodev mmiodev;
struct acrn_vm *target_vm = get_vm_from_vmid(vmid);
/* We should only de-assign a device from a post-launched VM at creating/shutdown/reset time */
if ((is_paused_vm(target_vm) || is_created_vm(target_vm)) && is_postlaunched_vm(target_vm)) {
if (copy_from_gpa(vm, &mmiodev, param, sizeof(mmiodev)) == 0) {
ret = deassign_mmio_dev(target_vm, &mmiodev);
if (ret == 0) {
ret = assign_mmio_dev(vm, &mmiodev);
}
}
} else {
pr_err("vm[%d] %s failed!\n",target_vm->vm_id, __func__);
}
return ret;
}
/**
* @brief Set interrupt mapping info of ptdev.
*