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kvm: selftests: introduce new VM mode for 64K pages

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Rename VM_MODE_FLAT48PG to be more descriptive of its config and add a
new config that has the same parameters, except with 64K pages.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Andrew Jones 2018-09-18 19:54:33 +02:00 committed by Paolo Bonzini
parent 0bec140fb6
commit 81d1cca0c0
5 changed files with 47 additions and 25 deletions
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7
tools/testing/selftests/kvm/include/kvm_util.h
View file

@ -34,9 +34,14 @@ typedef uint64_t vm_vaddr_t; /* Virtual Machine (Guest) virtual address */
#define DEFAULT_STACK_PGS 5
enum vm_guest_mode {
VM_MODE_FLAT48PG,
VM_MODE_P52V48_4K,
VM_MODE_P52V48_64K,
NUM_VM_MODES,
};
#define vm_guest_mode_string(m) vm_guest_mode_string[m]
extern const char * const vm_guest_mode_string[];
enum vm_mem_backing_src_type {
VM_MEM_SRC_ANONYMOUS,
VM_MEM_SRC_ANONYMOUS_THP,

8
tools/testing/selftests/kvm/lib/aarch64/processor.c
View file

@ -226,7 +226,7 @@ struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages,
uint64_t extra_pg_pages = (extra_mem_pages / ptrs_per_4k_pte) * 2;
struct kvm_vm *vm;
vm = vm_create(VM_MODE_FLAT48PG, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages, O_RDWR);
vm = vm_create(VM_MODE_P52V48_4K, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages, O_RDWR);
kvm_vm_elf_load(vm, program_invocation_name, 0, 0);
vm_vcpu_add_default(vm, vcpuid, guest_code);
@ -267,10 +267,14 @@ void vcpu_setup(struct kvm_vm *vm, int vcpuid, int pgd_memslot, int gdt_memslot)
get_reg(vm, vcpuid, ARM64_SYS_REG(TCR_EL1), &tcr_el1);
switch (vm->mode) {
case VM_MODE_FLAT48PG:
case VM_MODE_P52V48_4K:
tcr_el1 |= 0ul << 14; /* TG0 = 4KB */
tcr_el1 |= 6ul << 32; /* IPS = 52 bits */
break;
case VM_MODE_P52V48_64K:
tcr_el1 |= 1ul << 14; /* TG0 = 64KB */
tcr_el1 |= 6ul << 32; /* IPS = 52 bits */
break;
default:
TEST_ASSERT(false, "Unknown guest mode, mode: 0x%x", vm->mode);
}

46
tools/testing/selftests/kvm/lib/kvm_util.c
View file

@ -17,7 +17,7 @@
#include <linux/kernel.h>
#define KVM_UTIL_PGS_PER_HUGEPG 512
#define KVM_UTIL_MIN_PADDR 0x2000
#define KVM_UTIL_MIN_PFN 2
/* Aligns x up to the next multiple of size. Size must be a power of 2. */
static void *align(void *x, size_t size)
@ -96,11 +96,16 @@ static void vm_open(struct kvm_vm *vm, int perm)
"rc: %i errno: %i", vm->fd, errno);
}
const char * const vm_guest_mode_string[] = {
"PA-bits:52, VA-bits:48, 4K pages",
"PA-bits:52, VA-bits:48, 64K pages",
};
/*
* VM Create
*
* Input Args:
* mode - VM Mode (e.g. VM_MODE_FLAT48PG)
* mode - VM Mode (e.g. VM_MODE_P52V48_4K)
* phy_pages - Physical memory pages
* perm - permission
*
@ -109,7 +114,7 @@ static void vm_open(struct kvm_vm *vm, int perm)
* Return:
* Pointer to opaque structure that describes the created VM.
*
* Creates a VM with the mode specified by mode (e.g. VM_MODE_FLAT48PG).
* Creates a VM with the mode specified by mode (e.g. VM_MODE_P52V48_4K).
* When phy_pages is non-zero, a memory region of phy_pages physical pages
* is created and mapped starting at guest physical address 0. The file
* descriptor to control the created VM is created with the permissions
@ -128,28 +133,34 @@ struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
/* Setup mode specific traits. */
switch (vm->mode) {
case VM_MODE_FLAT48PG:
case VM_MODE_P52V48_4K:
vm->pgtable_levels = 4;
vm->page_size = 0x1000;
vm->page_shift = 12;
vm->va_bits = 48;
/* Limit to 48-bit canonical virtual addresses. */
vm->vpages_valid = sparsebit_alloc();
sparsebit_set_num(vm->vpages_valid,
0, (1ULL << (48 - 1)) >> vm->page_shift);
sparsebit_set_num(vm->vpages_valid,
(~((1ULL << (48 - 1)) - 1)) >> vm->page_shift,
(1ULL << (48 - 1)) >> vm->page_shift);
/* Limit physical addresses to 52-bits. */
vm->max_gfn = ((1ULL << 52) >> vm->page_shift) - 1;
break;
case VM_MODE_P52V48_64K:
vm->pgtable_levels = 3;
vm->pa_bits = 52;
vm->page_size = 0x10000;
vm->page_shift = 16;
vm->va_bits = 48;
break;
default:
TEST_ASSERT(false, "Unknown guest mode, mode: 0x%x", mode);
}
/* Limit to VA-bit canonical virtual addresses. */
vm->vpages_valid = sparsebit_alloc();
sparsebit_set_num(vm->vpages_valid,
0, (1ULL << (vm->va_bits - 1)) >> vm->page_shift);
sparsebit_set_num(vm->vpages_valid,
(~((1ULL << (vm->va_bits - 1)) - 1)) >> vm->page_shift,
(1ULL << (vm->va_bits - 1)) >> vm->page_shift);
/* Limit physical addresses to PA-bits. */
vm->max_gfn = ((1ULL << vm->pa_bits) >> vm->page_shift) - 1;
/* Allocate and setup memory for guest. */
vm->vpages_mapped = sparsebit_alloc();
if (phy_pages != 0)
@ -868,7 +879,8 @@ vm_vaddr_t vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min,
pages--, vaddr += vm->page_size) {
vm_paddr_t paddr;
paddr = vm_phy_page_alloc(vm, KVM_UTIL_MIN_PADDR, data_memslot);
paddr = vm_phy_page_alloc(vm,
KVM_UTIL_MIN_PFN * vm->page_size, data_memslot);
virt_pg_map(vm, vaddr, paddr, pgd_memslot);

1
tools/testing/selftests/kvm/lib/kvm_util_internal.h
View file

@ -49,6 +49,7 @@ struct kvm_vm {
unsigned int pgtable_levels;
unsigned int page_size;
unsigned int page_shift;
unsigned int pa_bits;
unsigned int va_bits;
uint64_t max_gfn;
struct vcpu *vcpu_head;

10
tools/testing/selftests/kvm/lib/x86_64/processor.c
View file

@ -231,7 +231,7 @@ void virt_pgd_alloc(struct kvm_vm *vm, uint32_t pgd_memslot)
{
int rc;
TEST_ASSERT(vm->mode == VM_MODE_FLAT48PG, "Attempt to use "
TEST_ASSERT(vm->mode == VM_MODE_P52V48_4K, "Attempt to use "
"unknown or unsupported guest mode, mode: 0x%x", vm->mode);
/* If needed, create page map l4 table. */
@ -264,7 +264,7 @@ void virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr,
uint16_t index[4];
struct pageMapL4Entry *pml4e;
TEST_ASSERT(vm->mode == VM_MODE_FLAT48PG, "Attempt to use "
TEST_ASSERT(vm->mode == VM_MODE_P52V48_4K, "Attempt to use "
"unknown or unsupported guest mode, mode: 0x%x", vm->mode);
TEST_ASSERT((vaddr % vm->page_size) == 0,
@ -551,7 +551,7 @@ vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva)
struct pageTableEntry *pte;
void *hva;
TEST_ASSERT(vm->mode == VM_MODE_FLAT48PG, "Attempt to use "
TEST_ASSERT(vm->mode == VM_MODE_P52V48_4K, "Attempt to use "
"unknown or unsupported guest mode, mode: 0x%x", vm->mode);
index[0] = (gva >> 12) & 0x1ffu;
@ -624,7 +624,7 @@ void vcpu_setup(struct kvm_vm *vm, int vcpuid, int pgd_memslot, int gdt_memslot)
kvm_setup_gdt(vm, &sregs.gdt, gdt_memslot, pgd_memslot);
switch (vm->mode) {
case VM_MODE_FLAT48PG:
case VM_MODE_P52V48_4K:
sregs.cr0 = X86_CR0_PE | X86_CR0_NE | X86_CR0_PG;
sregs.cr4 |= X86_CR4_PAE | X86_CR4_OSFXSR;
sregs.efer |= (EFER_LME | EFER_LMA | EFER_NX);
@ -823,7 +823,7 @@ struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages,
uint64_t extra_pg_pages = extra_mem_pages / 512 * 2;
/* Create VM */
vm = vm_create(VM_MODE_FLAT48PG,
vm = vm_create(VM_MODE_P52V48_4K,
DEFAULT_GUEST_PHY_PAGES + extra_pg_pages,
O_RDWR);