mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2026-06-06 09:06:30 +00:00
d8179519b9
Currently no post-work is done for I/O requests of type PCICFG or WP. The
impacts include:
1. ''valid'' in VHM request buffers are left as 1 even after the I/O request
completes. This violates the pre-condition of acrn_insert_request_wait()
but does not cause failures since a new I/O request can never happen
before the previous one completes.
2. Values read from PCI configuration spaces are never passed to UOS.
This patch adds the post-work for these two kinds of I/O requests. The post-work
for port I/O is invoked for PCICFG since it is essentially a port I/O and the
request structure is compatible. No post-work is needed for WP as it is only
triggered for EPT violations on writes, while post-work is mainly for reads.
v2 -> v3:
* Consistently use 0/1 (not false/true) for the ''valid'' member.
* Add comments to suggest when the hypervisor can see REQ_PCICFG and why
dm_emulate_pio_post also works in such cases.
* Rename: mark_ioreq_done -> complete_ioreq
* Rename: complete_request -> emulate_io_post
* Rename: hcall_notify_req_finish -> hcall_notify_ioreq_finish
Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
183 lines
4.1 KiB
C
183 lines
4.1 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <hypervisor.h>
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#include <hypercall.h>
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/*
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* Pass return value to SOS by register rax.
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* This function should always return 0 since we shouldn't
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* deal with hypercall error in hypervisor.
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*/
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int vmcall_vmexit_handler(struct vcpu *vcpu)
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{
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int32_t ret = -EACCES;
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struct vm *vm = vcpu->vm;
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struct run_context *cur_context =
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&vcpu->arch_vcpu.contexts[vcpu->arch_vcpu.cur_context];
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/* hypercall ID from guest*/
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uint64_t hypcall_id = cur_context->guest_cpu_regs.regs.r8;
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/* hypercall param1 from guest*/
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uint64_t param1 = cur_context->guest_cpu_regs.regs.rdi;
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/* hypercall param2 from guest*/
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uint64_t param2 = cur_context->guest_cpu_regs.regs.rsi;
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if (!is_hypercall_from_ring0()) {
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pr_err("hypercall is only allowed from RING-0!\n");
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goto out;
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}
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if (!is_vm0(vm) && hypcall_id != HC_WORLD_SWITCH &&
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hypcall_id != HC_INITIALIZE_TRUSTY) {
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pr_err("hypercall %d is only allowed from VM0!\n", hypcall_id);
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goto out;
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}
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/* Dispatch the hypercall handler */
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switch (hypcall_id) {
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case HC_SOS_OFFLINE_CPU:
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ret = hcall_sos_offline_cpu(vm, param1);
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break;
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case HC_GET_API_VERSION:
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#ifdef CONFIG_VM0_DESC
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/* vm0 will call HC_GET_API_VERSION as first hypercall, fixup
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* vm0 vcpu here.
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*/
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vm_fixup(vm);
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#endif
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ret = hcall_get_api_version(vm, param1);
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break;
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case HC_CREATE_VM:
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ret = hcall_create_vm(vm, param1);
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break;
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case HC_DESTROY_VM:
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/* param1: vmid */
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ret = hcall_destroy_vm((uint16_t)param1);
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break;
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case HC_START_VM:
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/* param1: vmid */
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ret = hcall_resume_vm((uint16_t)param1);
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break;
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case HC_PAUSE_VM:
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/* param1: vmid */
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ret = hcall_pause_vm((uint16_t)param1);
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break;
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case HC_CREATE_VCPU:
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/* param1: vmid */
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ret = hcall_create_vcpu(vm, (uint16_t)param1, param2);
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break;
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case HC_ASSERT_IRQLINE:
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/* param1: vmid */
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ret = hcall_assert_irqline(vm, (uint16_t)param1, param2);
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break;
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case HC_DEASSERT_IRQLINE:
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/* param1: vmid */
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ret = hcall_deassert_irqline(vm, (uint16_t)param1, param2);
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break;
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case HC_PULSE_IRQLINE:
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/* param1: vmid */
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ret = hcall_pulse_irqline(vm, (uint16_t)param1, param2);
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break;
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case HC_INJECT_MSI:
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/* param1: vmid */
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ret = hcall_inject_msi(vm, (uint16_t)param1, param2);
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break;
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case HC_SET_IOREQ_BUFFER:
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/* param1: vmid */
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ret = hcall_set_ioreq_buffer(vm, (uint16_t)param1, param2);
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break;
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case HC_NOTIFY_REQUEST_FINISH:
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/* param1: vmid
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* param2: vcpu_id */
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ret = hcall_notify_ioreq_finish((uint16_t)param1,
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(uint16_t)param2);
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break;
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case HC_VM_SET_MEMORY_REGION:
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/* param1: vmid */
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ret = hcall_set_vm_memory_region(vm, (uint16_t)param1, param2);
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break;
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case HC_VM_SET_MEMORY_REGIONS:
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ret = hcall_set_vm_memory_regions(vm, param1);
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break;
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case HC_VM_WRITE_PROTECT_PAGE:
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ret = hcall_write_protect_page(vm, (uint16_t)param1, param2);
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break;
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case HC_VM_PCI_MSIX_REMAP:
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/* param1: vmid */
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ret = hcall_remap_pci_msix(vm, (uint16_t)param1, param2);
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break;
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case HC_VM_GPA2HPA:
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/* param1: vmid */
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ret = hcall_gpa_to_hpa(vm, (uint16_t)param1, param2);
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break;
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case HC_ASSIGN_PTDEV:
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/* param1: vmid */
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ret = hcall_assign_ptdev(vm, (uint16_t)param1, param2);
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break;
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case HC_DEASSIGN_PTDEV:
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/* param1: vmid */
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ret = hcall_deassign_ptdev(vm, (uint16_t)param1, param2);
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break;
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case HC_SET_PTDEV_INTR_INFO:
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/* param1: vmid */
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ret = hcall_set_ptdev_intr_info(vm, (uint16_t)param1, param2);
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break;
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case HC_RESET_PTDEV_INTR_INFO:
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/* param1: vmid */
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ret = hcall_reset_ptdev_intr_info(vm, (uint16_t)param1, param2);
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break;
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case HC_SETUP_SBUF:
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ret = hcall_setup_sbuf(vm, param1);
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break;
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case HC_WORLD_SWITCH:
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ret = hcall_world_switch(vcpu);
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break;
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case HC_INITIALIZE_TRUSTY:
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ret = hcall_initialize_trusty(vcpu, param1);
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break;
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case HC_PM_GET_CPU_STATE:
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ret = hcall_get_cpu_pm_state(vm, param1, param2);
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break;
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default:
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pr_err("op %d: Invalid hypercall\n", hypcall_id);
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ret = -EPERM;
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break;
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}
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out:
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cur_context->guest_cpu_regs.regs.rax = (uint64_t)ret;
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TRACE_2L(TRACE_VMEXIT_VMCALL, vm->attr.id, hypcall_id);
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return 0;
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}
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