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hv: nested: support for VMLAUNCH and VMRESUME emulation

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Implement the VMLAUNCH and VMRESUME instructions, allowing a L1
hypervisor to run nested guests.

- merge VMCS control fields and VMCS guest fields to VMCS02
- clear shadow VMCS indicator on VMCS02 and load VMCS02 as current
- set VMCS12 launch state to "launched" in VMLAUNCH handler

Tracked-On: #5923
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
Signed-off-by: Zide Chen <zide.chen@intel.com>
Signed-off-by: Alex Merritt <alex.merritt@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Zide Chen
2021-05-10 19:03:55 -07:00
committed by wenlingz
parent ad48bf254d
commit 4c29a0bb29
3 changed files with 178 additions and 7 deletions
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10
hypervisor/arch/x86/guest/vmexit.c
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@@ -78,13 +78,13 @@ static const struct vm_exit_dispatch dispatch_table[NR_VMX_EXIT_REASONS] = {
.handler = unhandled_vmexit_handler},
[VMX_EXIT_REASON_VMCALL] = {
.handler = vmcall_vmexit_handler},
[VMX_EXIT_REASON_VMLAUNCH] = {
.handler = undefined_vmexit_handler},
[VMX_EXIT_REASON_VMPTRST] = {
.handler = undefined_vmexit_handler},
#ifndef CONFIG_NVMX_ENABLED
[VMX_EXIT_REASON_VMLAUNCH] = {
.handler = undefined_vmexit_handler},
[VMX_EXIT_REASON_VMRESUME] = {
.handler = undefined_vmexit_handler},
#ifndef CONFIG_NVMX_ENABLED
[VMX_EXIT_REASON_VMCLEAR] = {
.handler = undefined_vmexit_handler},
[VMX_EXIT_REASON_VMPTRLD] = {
@@ -98,6 +98,10 @@ static const struct vm_exit_dispatch dispatch_table[NR_VMX_EXIT_REASONS] = {
[VMX_EXIT_REASON_VMXON] = {
.handler = undefined_vmexit_handler},
#else
[VMX_EXIT_REASON_VMLAUNCH] = {
.handler = vmlaunch_vmexit_handler},
[VMX_EXIT_REASON_VMRESUME] = {
.handler = vmresume_vmexit_handler},
[VMX_EXIT_REASON_VMCLEAR] = {
.handler = vmclear_vmexit_handler,
.need_exit_qualification = 1},