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KVM: selftests: Allocate x86's TSS at VM creation

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Allocate x86's per-VM TSS at creation of a non-barebones VM.  Like the
GDT, the TSS is needed to actually run vCPUs, i.e. every non-barebones VM
is all but guaranteed to allocate the TSS sooner or later.

Reviewed-by: Ackerley Tng <ackerleytng@google.com>
Link: https://lore.kernel.org/r/20240314232637.2538648-16-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2024-03-14 16:26:34 -07:00
parent 23ef21f58c
commit a2834e6e0b
1 changed files with 2 additions and 3 deletions
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tools/testing/selftests/kvm/lib/x86_64/processor.c
+2 -3
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@@ -520,9 +520,6 @@ vm_paddr_t addr_arch_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva)
static void kvm_setup_tss_64bit(struct kvm_vm *vm, struct kvm_segment *segp,
int selector)
{
if (!vm->arch.tss)
vm->arch.tss = __vm_vaddr_alloc_page(vm, MEM_REGION_DATA);
memset(segp, 0, sizeof(*segp));
segp->base = vm->arch.tss;
segp->limit = 0x67;
@@ -620,6 +617,8 @@ static void vm_init_descriptor_tables(struct kvm_vm *vm)
vm->arch.gdt = __vm_vaddr_alloc_page(vm, MEM_REGION_DATA);
vm->arch.idt = __vm_vaddr_alloc_page(vm, MEM_REGION_DATA);
vm->handlers = __vm_vaddr_alloc_page(vm, MEM_REGION_DATA);
vm->arch.tss = __vm_vaddr_alloc_page(vm, MEM_REGION_DATA);
/* Handlers have the same address in both address spaces.*/
for (i = 0; i < NUM_INTERRUPTS; i++)
set_idt_entry(vm, i, (unsigned long)(&idt_handlers)[i], 0,