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hv: add the support of vector remapping for pre-launched VMs

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For pre-launched VMs MSI/MSI-x configuration writes are not intercepted by ACRN.
It is pass-thru and interrupts land in ACRN and the guest vector is injected into
the VM's vLAPIC. With this patch, ACRN intercepts MSI/MSI-x config writes and take
the code path to remap interrupt vector/APIC ID as it does for SOS/UOS.

Tracked-On: #2879
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
Reviewed-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Sainath Grandhi
2019-04-02 22:51:32 -07:00
committed by Eddie Dong
parent c4ec7ac358
commit 5b795a3312
7 changed files with 235 additions and 160 deletions
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9
hypervisor/arch/x86/guest/io_emul.c
View File

@@ -592,7 +592,8 @@ void register_pio_emulation_handler(struct acrn_vm *vm, uint32_t pio_idx,
/**
* @brief Register a MMIO handler
*
* This API registers a MMIO handler to \p vm before it is launched.
* This API registers a MMIO handler to \p vm before it is Started
* For Pre-launched VMs, this API can be called after it is Started
*
* @param vm The VM to which the MMIO handler is registered
* @param read_write The handler for emulating accesses to the given range
@@ -610,9 +611,7 @@ int32_t register_mmio_emulation_handler(struct acrn_vm *vm,
int32_t status = -EINVAL;
struct mem_io_node *mmio_node;
if ((vm->hw.created_vcpus > 0U) && (vm->hw.vcpu_array[0].launched)) {
pr_err("register mmio handler after vm launched");
} else {
if (is_prelaunched_vm(vm) || (vm->state != VM_STARTED)) {
/* Ensure both a read/write handler and range check function exist */
if ((read_write != NULL) && (end > start)) {
if (vm->emul_mmio_regions >= CONFIG_MAX_EMULATED_MMIO_REGIONS) {
@@ -640,6 +639,8 @@ int32_t register_mmio_emulation_handler(struct acrn_vm *vm,
status = 0;
}
}
} else {
pr_err("register mmio handler after VM is Started");
}
/* Return status to caller */

12
hypervisor/arch/x86/guest/vm.c
View File

@@ -68,6 +68,18 @@ bool is_sos_vm(const struct acrn_vm *vm)
return (vm != NULL) && (get_vm_config(vm->vm_id)->type == SOS_VM);
}
/**
* @pre vm != NULL
* @pre vm->vmid < CONFIG_MAX_VM_NUM
*/
bool is_prelaunched_vm(const struct acrn_vm *vm)
{
struct acrn_vm_config *vm_config;
vm_config = get_vm_config(vm->vm_id);
return (vm_config->type == PRE_LAUNCHED_VM);
}
/**
* @pre vm != NULL && vm_config != NULL && vm->vmid < CONFIG_MAX_VM_NUM
*/