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kvm: selftest: pass in extra memory when create vm

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This information can be used to decide the size of the default memory
slot, which will need to cover the extra pages with page tables.

Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peter Xu 2018-08-22 15:19:59 +08:00 committed by Paolo Bonzini
parent bc8eb2fe2e
commit aee41be593
7 changed files with 23 additions and 8 deletions
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2
tools/testing/selftests/kvm/cr4_cpuid_sync_test.c
View file

@ -79,7 +79,7 @@ int main(int argc, char *argv[])
setbuf(stdout, NULL);
/* Create VM */
vm = vm_create_default(VCPU_ID, guest_code);
vm = vm_create_default(VCPU_ID, 0, guest_code);
vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
run = vcpu_state(vm, VCPU_ID);

3
tools/testing/selftests/kvm/include/kvm_util.h
View file

@ -127,7 +127,8 @@ kvm_get_supported_cpuid_entry(uint32_t function)
return kvm_get_supported_cpuid_index(function, 0);
}
struct kvm_vm *vm_create_default(uint32_t vcpuid, void *guest_code);
struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_size,
void *guest_code);
void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code);
typedef void (*vmx_guest_code_t)(vm_vaddr_t vmxon_vaddr,

18
tools/testing/selftests/kvm/lib/x86.c
View file

@ -702,6 +702,9 @@ void vcpu_set_cpuid(struct kvm_vm *vm,
*
* Input Args:
* vcpuid - The id of the single VCPU to add to the VM.
* extra_mem_pages - The size of extra memories to add (this will
* decide how much extra space we will need to
* setup the page tables using mem slot 0)
* guest_code - The vCPU's entry point
*
* Output Args: None
@ -709,12 +712,23 @@ void vcpu_set_cpuid(struct kvm_vm *vm,
* Return:
* Pointer to opaque structure that describes the created VM.
*/
struct kvm_vm *vm_create_default(uint32_t vcpuid, void *guest_code)
struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages,
void *guest_code)
{
struct kvm_vm *vm;
/*
* For x86 the maximum page table size for a memory region
* will be when only 4K pages are used. In that case the
* total extra size for page tables (for extra N pages) will
* be: N/512+N/512^2+N/512^3+... which is definitely smaller
* than N/512*2.
*/
uint64_t extra_pg_pages = extra_mem_pages / 512 * 2;
/* Create VM */
vm = vm_create(VM_MODE_FLAT48PG, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
vm = vm_create(VM_MODE_FLAT48PG,
DEFAULT_GUEST_PHY_PAGES + extra_pg_pages,
O_RDWR);
/* Setup guest code */
kvm_vm_elf_load(vm, program_invocation_name, 0, 0);

2
tools/testing/selftests/kvm/set_sregs_test.c
View file

@ -36,7 +36,7 @@ int main(int argc, char *argv[])
setbuf(stdout, NULL);
/* Create VM */
vm = vm_create_default(VCPU_ID, NULL);
vm = vm_create_default(VCPU_ID, 0, NULL);
vcpu_sregs_get(vm, VCPU_ID, &sregs);
sregs.apic_base = 1 << 10;

2
tools/testing/selftests/kvm/state_test.c
View file

@ -132,7 +132,7 @@ int main(int argc, char *argv[])
struct kvm_cpuid_entry2 *entry = kvm_get_supported_cpuid_entry(1);
/* Create VM */
vm = vm_create_default(VCPU_ID, guest_code);
vm = vm_create_default(VCPU_ID, 0, guest_code);
vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
run = vcpu_state(vm, VCPU_ID);

2
tools/testing/selftests/kvm/sync_regs_test.c
View file

@ -94,7 +94,7 @@ int main(int argc, char *argv[])
}
/* Create VM */
vm = vm_create_default(VCPU_ID, guest_code);
vm = vm_create_default(VCPU_ID, 0, guest_code);
run = vcpu_state(vm, VCPU_ID);

2
tools/testing/selftests/kvm/vmx_tsc_adjust_test.c
View file

@ -137,7 +137,7 @@ int main(int argc, char *argv[])
exit(KSFT_SKIP);
}
vm = vm_create_default(VCPU_ID, (void *) l1_guest_code);
vm = vm_create_default(VCPU_ID, 0, (void *) l1_guest_code);
vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
/* Allocate VMX pages and shared descriptors (vmx_pages). */