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KVM: selftests: Drop @slot0_mem_pages from __vm_create_with_vcpus()

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All callers of __vm_create_with_vcpus() pass DEFAULT_GUEST_PHY_PAGES for
@slot_mem_pages; drop the param and just hardcode the "default" as the
base number of pages for slot0.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2022-05-02 17:25:17 -07:00 committed by Paolo Bonzini
parent 68c1b3e910
commit 3222d0264f
4 changed files with 14 additions and 26 deletions
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9
tools/testing/selftests/kvm/include/kvm_util_base.h
View File

@ -561,18 +561,15 @@ static inline struct kvm_vm *vm_create(uint64_t nr_pages)
return __vm_create(VM_MODE_DEFAULT, nr_pages);
}
/* Like vm_create_default_with_vcpus, but accepts mode and slot0 memory as a parameter */
struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus,
uint64_t slot0_mem_pages, uint64_t extra_mem_pages,
uint32_t num_percpu_pages, void *guest_code,
struct kvm_vcpu *vcpus[]);
uint64_t extra_mem_pages, uint32_t num_percpu_pages,
void *guest_code, struct kvm_vcpu *vcpus[]);
static inline struct kvm_vm *vm_create_with_vcpus(uint32_t nr_vcpus,
void *guest_code,
struct kvm_vcpu *vcpus[])
{
return __vm_create_with_vcpus(VM_MODE_DEFAULT, nr_vcpus,
DEFAULT_GUEST_PHY_PAGES, 0, 0,
return __vm_create_with_vcpus(VM_MODE_DEFAULT, nr_vcpus, 0, 0,
guest_code, vcpus);
}

5
tools/testing/selftests/kvm/kvm_page_table_test.c
View File

@ -254,9 +254,8 @@ static struct kvm_vm *pre_init_before_test(enum vm_guest_mode mode, void *arg)
/* Create a VM with enough guest pages */
guest_num_pages = test_mem_size / guest_page_size;
vm = __vm_create_with_vcpus(mode, nr_vcpus, DEFAULT_GUEST_PHY_PAGES,
guest_num_pages, 0, guest_code,
test_args.vcpus);
vm = __vm_create_with_vcpus(mode, nr_vcpus, guest_num_pages, 0,
guest_code, test_args.vcpus);
/* Align down GPA of the testing memslot */
if (!p->phys_offset)

21
tools/testing/selftests/kvm/lib/kvm_util.c
View File

@ -280,7 +280,6 @@ struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint64_t nr_pages)
* Input Args:
* mode - VM Mode (e.g. VM_MODE_P52V48_4K)
* nr_vcpus - VCPU count
* slot0_mem_pages - Slot0 physical memory size
* extra_mem_pages - Non-slot0 physical memory total size
* num_percpu_pages - Per-cpu physical memory pages
* guest_code - Guest entry point
@ -291,15 +290,13 @@ struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint64_t nr_pages)
* Return:
* Pointer to opaque structure that describes the created VM.
*
* Creates a VM with the mode specified by mode (e.g. VM_MODE_P52V48_4K),
* with customized slot0 memory size, at least 512 pages currently.
* Creates a VM with the mode specified by mode (e.g. VM_MODE_P52V48_4K).
* extra_mem_pages is only used to calculate the maximum page table size,
* no real memory allocation for non-slot0 memory in this function.
*/
struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus,
uint64_t slot0_mem_pages, uint64_t extra_mem_pages,
uint32_t num_percpu_pages, void *guest_code,
struct kvm_vcpu *vcpus[])
uint64_t extra_mem_pages, uint32_t num_percpu_pages,
void *guest_code, struct kvm_vcpu *vcpus[])
{
uint64_t vcpu_pages, extra_pg_pages, pages;
struct kvm_vm *vm;
@ -307,10 +304,6 @@ struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus
TEST_ASSERT(!nr_vcpus || vcpus, "Must provide vCPU array");
/* Force slot0 memory size not small than DEFAULT_GUEST_PHY_PAGES */
if (slot0_mem_pages < DEFAULT_GUEST_PHY_PAGES)
slot0_mem_pages = DEFAULT_GUEST_PHY_PAGES;
/* The maximum page table size for a memory region will be when the
* smallest pages are used. Considering each page contains x page
* table descriptors, the total extra size for page tables (for extra
@ -318,8 +311,8 @@ struct kvm_vm *__vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus
* than N/x*2.
*/
vcpu_pages = (DEFAULT_STACK_PGS + num_percpu_pages) * nr_vcpus;
extra_pg_pages = (slot0_mem_pages + extra_mem_pages + vcpu_pages) / PTES_PER_MIN_PAGE * 2;
pages = slot0_mem_pages + vcpu_pages + extra_pg_pages;
extra_pg_pages = (DEFAULT_GUEST_PHY_PAGES + extra_mem_pages + vcpu_pages) / PTES_PER_MIN_PAGE * 2;
pages = DEFAULT_GUEST_PHY_PAGES + vcpu_pages + extra_pg_pages;
TEST_ASSERT(nr_vcpus <= kvm_check_cap(KVM_CAP_MAX_VCPUS),
"nr_vcpus = %d too large for host, max-vcpus = %d",
@ -340,8 +333,8 @@ struct kvm_vm *__vm_create_with_one_vcpu(struct kvm_vcpu **vcpu,
struct kvm_vcpu *vcpus[1];
struct kvm_vm *vm;
vm = __vm_create_with_vcpus(VM_MODE_DEFAULT, 1, DEFAULT_GUEST_PHY_PAGES,
extra_mem_pages, 0, guest_code, vcpus);
vm = __vm_create_with_vcpus(VM_MODE_DEFAULT, 1, extra_mem_pages, 0,
guest_code, vcpus);
*vcpu = vcpus[0];
return vm;

5
tools/testing/selftests/kvm/lib/perf_test_util.c
View File

@ -113,7 +113,7 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int nr_vcpus,
{
struct perf_test_args *pta = &perf_test_args;
struct kvm_vm *vm;
uint64_t guest_num_pages, slot0_pages = DEFAULT_GUEST_PHY_PAGES;
uint64_t guest_num_pages, slot0_pages = 0;
uint64_t backing_src_pagesz = get_backing_src_pagesz(backing_src);
uint64_t region_end_gfn;
int i;
@ -152,8 +152,7 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int nr_vcpus,
* The memory is also added to memslot 0, but that's a benign side
* effect as KVM allows aliasing HVAs in meslots.
*/
vm = __vm_create_with_vcpus(mode, nr_vcpus, DEFAULT_GUEST_PHY_PAGES,
slot0_pages + guest_num_pages, 0,
vm = __vm_create_with_vcpus(mode, nr_vcpus, slot0_pages + guest_num_pages, 0,
perf_test_guest_code, vcpus);
pta->vm = vm;