Commit 44a95dae authored by Suravee Suthikulpanit's avatar Suravee Suthikulpanit Committed by Paolo Bonzini

KVM: x86: Detect and Initialize AVIC support

This patch introduces AVIC-related data structure, and AVIC
initialization code.

There are three main data structures for AVIC:
    * Virtual APIC (vAPIC) backing page (per-VCPU)
    * Physical APIC ID table (per-VM)
    * Logical APIC ID table (per-VM)

Currently, AVIC is disabled by default. Users can manually
enable AVIC via kernel boot option kvm-amd.avic=1 or during
kvm-amd module loading with parameter avic=1.
Signed-off-by: default avatarSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
[Avoid extra indentation (Boris). - Paolo]
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 3d5615e5
......@@ -773,6 +773,10 @@ struct kvm_arch {
u8 nr_reserved_ioapic_pins;
bool disabled_lapic_found;
/* Struct members for AVIC */
struct page *avic_logical_id_table_page;
struct page *avic_physical_id_table_page;
};
struct kvm_vm_stat {
......
......@@ -116,6 +116,9 @@ struct __attribute__ ((__packed__)) vmcb_control_area {
#define V_INTR_MASKING_SHIFT 24
#define V_INTR_MASKING_MASK (1 << V_INTR_MASKING_SHIFT)
#define AVIC_ENABLE_SHIFT 31
#define AVIC_ENABLE_MASK (1 << AVIC_ENABLE_SHIFT)
#define SVM_INTERRUPT_SHADOW_MASK 1
#define SVM_IOIO_STR_SHIFT 2
......
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