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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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7
hypervisor/include/arch/x86/asm/guest/nested.h
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@@ -84,6 +84,9 @@ union value_64 {
/* refer to ISDM: Table 30-1. VM-Instruction Error Numbers */
#define VMXERR_VMCLEAR_VMXON_POINTER (3)
#define VMXERR_VMLAUNCH_NONCLEAR_VMCS (4)
#define VMXERR_VMRESUME_NONLAUNCHED_VMCS (5)
#define VMXERR_VMRESUME_AFTER_VMXOFF (6)
#define VMXERR_VMPTRLD_INVALID_ADDRESS (9)
#define VMXERR_VMPTRLD_INCORRECT_VMCS_REVISION_ID (10)
#define VMXERR_VMPTRLD_VMXON_POINTER (11)
@@ -317,6 +320,8 @@ int32_t vmptrld_vmexit_handler(struct acrn_vcpu *vcpu);
int32_t vmclear_vmexit_handler(struct acrn_vcpu *vcpu);
int32_t vmread_vmexit_handler(struct acrn_vcpu *vcpu);
int32_t vmwrite_vmexit_handler(struct acrn_vcpu *vcpu);
int32_t vmresume_vmexit_handler(struct acrn_vcpu *vcpu);
int32_t vmlaunch_vmexit_handler(struct acrn_vcpu *vcpu);
#ifdef CONFIG_NVMX_ENABLED
struct acrn_nested {
@@ -327,8 +332,10 @@ struct acrn_nested {
uint64_t current_vmcs12_ptr; /* GPA */
uint64_t vmxon_ptr; /* GPA */
bool vmxon; /* To indicate if vCPU entered VMX operation */
bool in_l2_guest; /* To indicate if vCPU is currently in Guest mode (from L1's perspective) */
bool host_state_dirty; /* To indicate need to merge VMCS12 host-state fields to VMCS01 */
bool gpa_field_dirty;
bool control_field_dirty; /* for VM-execution, VM-exit, VM-entry control fields */
} __aligned(PAGE_SIZE);
void init_nested_vmx(__unused struct acrn_vm *vm);