kvm: selftests: introduce new VM mode for 64K pages
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>hifive-unleashed-5.1
Andrew Jones
Paolo Bonzini
parent
0bec140fb6
commit
81d1cca0c0
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@ -34,9 +34,14 @@ typedef uint64_t vm_vaddr_t; /* Virtual Machine (Guest) virtual address */
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#define DEFAULT_STACK_PGS 5
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enum vm_guest_mode {
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VM_MODE_FLAT48PG,
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VM_MODE_P52V48_4K,
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VM_MODE_P52V48_64K,
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NUM_VM_MODES,
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};
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#define vm_guest_mode_string(m) vm_guest_mode_string[m]
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extern const char * const vm_guest_mode_string[];
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enum vm_mem_backing_src_type {
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VM_MEM_SRC_ANONYMOUS,
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VM_MEM_SRC_ANONYMOUS_THP,
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@ -226,7 +226,7 @@ struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages,
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uint64_t extra_pg_pages = (extra_mem_pages / ptrs_per_4k_pte) * 2;
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struct kvm_vm *vm;
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vm = vm_create(VM_MODE_FLAT48PG, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages, O_RDWR);
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vm = vm_create(VM_MODE_P52V48_4K, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages, O_RDWR);
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kvm_vm_elf_load(vm, program_invocation_name, 0, 0);
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vm_vcpu_add_default(vm, vcpuid, guest_code);
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@ -267,10 +267,14 @@ void vcpu_setup(struct kvm_vm *vm, int vcpuid, int pgd_memslot, int gdt_memslot)
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get_reg(vm, vcpuid, ARM64_SYS_REG(TCR_EL1), &tcr_el1);
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switch (vm->mode) {
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case VM_MODE_FLAT48PG:
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case VM_MODE_P52V48_4K:
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tcr_el1 |= 0ul << 14; /* TG0 = 4KB */
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tcr_el1 |= 6ul << 32; /* IPS = 52 bits */
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break;
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case VM_MODE_P52V48_64K:
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tcr_el1 |= 1ul << 14; /* TG0 = 64KB */
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tcr_el1 |= 6ul << 32; /* IPS = 52 bits */
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break;
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default:
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TEST_ASSERT(false, "Unknown guest mode, mode: 0x%x", vm->mode);
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}
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@ -17,7 +17,7 @@
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#include <linux/kernel.h>
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#define KVM_UTIL_PGS_PER_HUGEPG 512
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#define KVM_UTIL_MIN_PADDR 0x2000
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#define KVM_UTIL_MIN_PFN 2
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/* Aligns x up to the next multiple of size. Size must be a power of 2. */
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static void *align(void *x, size_t size)
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@ -96,11 +96,16 @@ static void vm_open(struct kvm_vm *vm, int perm)
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"rc: %i errno: %i", vm->fd, errno);
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}
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const char * const vm_guest_mode_string[] = {
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"PA-bits:52, VA-bits:48, 4K pages",
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"PA-bits:52, VA-bits:48, 64K pages",
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};
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/*
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* VM Create
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*
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* Input Args:
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* mode - VM Mode (e.g. VM_MODE_FLAT48PG)
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* mode - VM Mode (e.g. VM_MODE_P52V48_4K)
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* phy_pages - Physical memory pages
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* perm - permission
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*
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@ -109,7 +114,7 @@ static void vm_open(struct kvm_vm *vm, int perm)
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* Return:
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* Pointer to opaque structure that describes the created VM.
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*
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* Creates a VM with the mode specified by mode (e.g. VM_MODE_FLAT48PG).
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* Creates a VM with the mode specified by mode (e.g. VM_MODE_P52V48_4K).
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* When phy_pages is non-zero, a memory region of phy_pages physical pages
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* is created and mapped starting at guest physical address 0. The file
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* descriptor to control the created VM is created with the permissions
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@ -128,28 +133,34 @@ struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
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/* Setup mode specific traits. */
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switch (vm->mode) {
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case VM_MODE_FLAT48PG:
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case VM_MODE_P52V48_4K:
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vm->pgtable_levels = 4;
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vm->page_size = 0x1000;
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vm->page_shift = 12;
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vm->va_bits = 48;
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/* Limit to 48-bit canonical virtual addresses. */
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vm->vpages_valid = sparsebit_alloc();
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sparsebit_set_num(vm->vpages_valid,
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0, (1ULL << (48 - 1)) >> vm->page_shift);
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sparsebit_set_num(vm->vpages_valid,
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(~((1ULL << (48 - 1)) - 1)) >> vm->page_shift,
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(1ULL << (48 - 1)) >> vm->page_shift);
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/* Limit physical addresses to 52-bits. */
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vm->max_gfn = ((1ULL << 52) >> vm->page_shift) - 1;
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break;
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case VM_MODE_P52V48_64K:
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vm->pgtable_levels = 3;
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vm->pa_bits = 52;
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vm->page_size = 0x10000;
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vm->page_shift = 16;
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vm->va_bits = 48;
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break;
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default:
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TEST_ASSERT(false, "Unknown guest mode, mode: 0x%x", mode);
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}
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/* Limit to VA-bit canonical virtual addresses. */
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vm->vpages_valid = sparsebit_alloc();
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sparsebit_set_num(vm->vpages_valid,
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0, (1ULL << (vm->va_bits - 1)) >> vm->page_shift);
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sparsebit_set_num(vm->vpages_valid,
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(~((1ULL << (vm->va_bits - 1)) - 1)) >> vm->page_shift,
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(1ULL << (vm->va_bits - 1)) >> vm->page_shift);
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/* Limit physical addresses to PA-bits. */
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vm->max_gfn = ((1ULL << vm->pa_bits) >> vm->page_shift) - 1;
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/* Allocate and setup memory for guest. */
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vm->vpages_mapped = sparsebit_alloc();
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if (phy_pages != 0)
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@ -868,7 +879,8 @@ vm_vaddr_t vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min,
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pages--, vaddr += vm->page_size) {
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vm_paddr_t paddr;
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paddr = vm_phy_page_alloc(vm, KVM_UTIL_MIN_PADDR, data_memslot);
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paddr = vm_phy_page_alloc(vm,
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KVM_UTIL_MIN_PFN * vm->page_size, data_memslot);
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virt_pg_map(vm, vaddr, paddr, pgd_memslot);
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@ -49,6 +49,7 @@ struct kvm_vm {
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unsigned int pgtable_levels;
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unsigned int page_size;
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unsigned int page_shift;
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unsigned int pa_bits;
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unsigned int va_bits;
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uint64_t max_gfn;
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struct vcpu *vcpu_head;
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@ -231,7 +231,7 @@ void virt_pgd_alloc(struct kvm_vm *vm, uint32_t pgd_memslot)
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{
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int rc;
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TEST_ASSERT(vm->mode == VM_MODE_FLAT48PG, "Attempt to use "
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TEST_ASSERT(vm->mode == VM_MODE_P52V48_4K, "Attempt to use "
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"unknown or unsupported guest mode, mode: 0x%x", vm->mode);
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/* If needed, create page map l4 table. */
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@ -264,7 +264,7 @@ void virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr,
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uint16_t index[4];
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struct pageMapL4Entry *pml4e;
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TEST_ASSERT(vm->mode == VM_MODE_FLAT48PG, "Attempt to use "
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TEST_ASSERT(vm->mode == VM_MODE_P52V48_4K, "Attempt to use "
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"unknown or unsupported guest mode, mode: 0x%x", vm->mode);
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TEST_ASSERT((vaddr % vm->page_size) == 0,
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@ -551,7 +551,7 @@ vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva)
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struct pageTableEntry *pte;
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void *hva;
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TEST_ASSERT(vm->mode == VM_MODE_FLAT48PG, "Attempt to use "
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TEST_ASSERT(vm->mode == VM_MODE_P52V48_4K, "Attempt to use "
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"unknown or unsupported guest mode, mode: 0x%x", vm->mode);
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index[0] = (gva >> 12) & 0x1ffu;
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@ -624,7 +624,7 @@ void vcpu_setup(struct kvm_vm *vm, int vcpuid, int pgd_memslot, int gdt_memslot)
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kvm_setup_gdt(vm, &sregs.gdt, gdt_memslot, pgd_memslot);
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switch (vm->mode) {
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case VM_MODE_FLAT48PG:
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case VM_MODE_P52V48_4K:
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sregs.cr0 = X86_CR0_PE | X86_CR0_NE | X86_CR0_PG;
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sregs.cr4 |= X86_CR4_PAE | X86_CR4_OSFXSR;
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sregs.efer |= (EFER_LME | EFER_LMA | EFER_NX);
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@ -823,7 +823,7 @@ struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages,
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uint64_t extra_pg_pages = extra_mem_pages / 512 * 2;
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/* Create VM */
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vm = vm_create(VM_MODE_FLAT48PG,
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vm = vm_create(VM_MODE_P52V48_4K,
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DEFAULT_GUEST_PHY_PAGES + extra_pg_pages,
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O_RDWR);
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