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svm: Introduces AVIC per-VM ID

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Introduces per-VM AVIC ID and helper functions to manage the IDs.
Currently, the ID will be used to implement 32-bit AVIC IOMMU GA tag.

The ID is 24-bit one-based indexing value, and is managed via helper
functions to get the next ID, or to free an ID once a VM is destroyed.
There should be no ID conflict for any active VMs.

Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Suravee Suthikulpanit
2016-08-23 13:52:41 -05:00
committed by Paolo Bonzini
parent 9ac7e3e815
commit 5ea11f2b31
2 changed files with 52 additions and 0 deletions
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arch/x86/include/asm/kvm_host.h
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@@ -781,6 +781,7 @@ struct kvm_arch {
bool disabled_lapic_found;
/* Struct members for AVIC */
u32 avic_vm_id;
u32 ldr_mode;
struct page *avic_logical_id_table_page;
struct page *avic_physical_id_table_page;