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KVM: VMX: Move private memory slot position

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PCI device assignment would map guest MMIO spaces as separate slot, so it is
possible that the device has more than 2 MMIO spaces and overwrite current
private memslot.

The patch move private memory slot to the top of userspace visible memory slots.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Sheng Yang 2008-10-16 17:30:58 +08:00 committed by Avi Kivity
parent 291f26bc0f
commit 6fe639792c
2 changed files with 4 additions and 3 deletions
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2
arch/x86/kvm/vmx.c
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@ -2513,7 +2513,7 @@ static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
{
int ret;
struct kvm_userspace_memory_region tss_mem = {
.slot = 8,
.slot = TSS_PRIVATE_MEMSLOT,
.guest_phys_addr = addr,
.memory_size = PAGE_SIZE * 3,
.flags = 0,

5
arch/x86/kvm/vmx.h
View file

@ -338,8 +338,9 @@ enum vmcs_field {
#define AR_RESERVD_MASK 0xfffe0f00
#define APIC_ACCESS_PAGE_PRIVATE_MEMSLOT 9
#define IDENTITY_PAGETABLE_PRIVATE_MEMSLOT 10
#define TSS_PRIVATE_MEMSLOT (KVM_MEMORY_SLOTS + 0)
#define APIC_ACCESS_PAGE_PRIVATE_MEMSLOT (KVM_MEMORY_SLOTS + 1)
#define IDENTITY_PAGETABLE_PRIVATE_MEMSLOT (KVM_MEMORY_SLOTS + 2)
#define VMX_NR_VPIDS (1 << 16)
#define VMX_VPID_EXTENT_SINGLE_CONTEXT 1