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hv: Add update_vm_vlapic_state API to sync the VM vLAPIC state

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This patch introduces vLAPIC state for a VM. The VM vLAPIC state can
be one of the following
 * VM_VLAPIC_X2APIC - All the vCPUs/vLAPICs (Except for those in Disabled mode) of this
	VM use x2APIC mode
 * VM_VLAPIC_XAPIC - All the vCPUs/vLAPICs (Except for those in Disabled mode) of this
	VM use xAPIC mode
 * VM_VLAPIC_DISABLED - All the vCPUs/vLAPICs of this VM are in Disabled mode
 * VM_VLAPIC_TRANSITION - Some of the vCPUs/vLAPICs of this VM (Except for those in Disabled mode)
	are in xAPIC and the others in x2APIC

Upon a vCPU updating the IA32_APIC_BASE MSR to switch LAPIC mode, this
API is called to sync the vLAPIC state of the VM. Upon VM creation and reset,
vLAPIC state is set to VM_VLAPIC_XAPIC, as ACRN starts the vCPUs vLAPIC in
XAPIC mode.

Tracked-On: #3253
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Sainath Grandhi
2019-06-10 16:54:39 -07:00
committed by wenlingz
parent a3fdc7a496
commit f3627d4839
3 changed files with 94 additions and 1 deletions
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11
hypervisor/include/arch/x86/guest/vm.h
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@@ -76,6 +76,13 @@ enum vm_state {
VM_PAUSED, /* VM paused */
};
enum vm_vlapic_state {
VM_VLAPIC_DISABLED = 0U,
VM_VLAPIC_XAPIC,
VM_VLAPIC_X2APIC,
VM_VLAPIC_TRANSITION
};
struct vm_arch {
/* I/O bitmaps A and B for this VM, MUST be 4-Kbyte aligned */
uint8_t io_bitmap[PAGE_SIZE*2];
@@ -93,6 +100,7 @@ struct vm_arch {
void *tmp_pg_array; /* Page array for tmp guest paging struct */
struct acrn_vioapic vioapic; /* Virtual IOAPIC base address */
struct acrn_vpic vpic; /* Virtual PIC */
enum vm_vlapic_state vlapic_state; /* Represents vLAPIC state across vCPUs*/
/* reference to virtual platform to come here (as needed) */
} __aligned(PAGE_SIZE);
@@ -109,7 +117,7 @@ struct acrn_vm {
struct acrn_vuart vuart[MAX_VUART_NUM_PER_VM]; /* Virtual UART */
enum vpic_wire_mode wire_mode;
struct iommu_domain *iommu; /* iommu domain of this VM */
spinlock_t spinlock; /* Spin-lock used to protect VM modifications */
spinlock_t vm_lock; /* Spin-lock used to protect VM modifications */
uint16_t emul_mmio_regions; /* Number of emulated mmio regions */
struct mem_io_node emul_mmio[CONFIG_MAX_EMULATED_MMIO_REGIONS];
@@ -218,6 +226,7 @@ bool is_lapic_pt_configured(const struct acrn_vm *vm);
bool is_rt_vm(const struct acrn_vm *vm);
bool is_highest_severity_vm(const struct acrn_vm *vm);
bool vm_hide_mtrr(const struct acrn_vm *vm);
void update_vm_vlapic_state(struct acrn_vm *vm);
#endif /* !ASSEMBLER */