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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/kvm/lib/s390x | |
parent | Initial commit. (diff) | |
download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/kvm/lib/s390x')
-rw-r--r-- | tools/testing/selftests/kvm/lib/s390x/processor.c | 247 | ||||
-rw-r--r-- | tools/testing/selftests/kvm/lib/s390x/ucall.c | 59 |
2 files changed, 306 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/lib/s390x/processor.c b/tools/testing/selftests/kvm/lib/s390x/processor.c new file mode 100644 index 000000000..7349bb2e1 --- /dev/null +++ b/tools/testing/selftests/kvm/lib/s390x/processor.c @@ -0,0 +1,247 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * KVM selftest s390x library code - CPU-related functions (page tables...) + * + * Copyright (C) 2019, Red Hat, Inc. + */ + +#define _GNU_SOURCE /* for program_invocation_name */ + +#include "processor.h" +#include "kvm_util.h" +#include "../kvm_util_internal.h" + +#define KVM_GUEST_PAGE_TABLE_MIN_PADDR 0x180000 + +#define PAGES_PER_REGION 4 + +void virt_pgd_alloc(struct kvm_vm *vm, uint32_t memslot) +{ + vm_paddr_t paddr; + + TEST_ASSERT(vm->page_size == 4096, "Unsupported page size: 0x%x", + vm->page_size); + + if (vm->pgd_created) + return; + + paddr = vm_phy_pages_alloc(vm, PAGES_PER_REGION, + KVM_GUEST_PAGE_TABLE_MIN_PADDR, memslot); + memset(addr_gpa2hva(vm, paddr), 0xff, PAGES_PER_REGION * vm->page_size); + + vm->pgd = paddr; + vm->pgd_created = true; +} + +/* + * Allocate 4 pages for a region/segment table (ri < 4), or one page for + * a page table (ri == 4). Returns a suitable region/segment table entry + * which points to the freshly allocated pages. + */ +static uint64_t virt_alloc_region(struct kvm_vm *vm, int ri, uint32_t memslot) +{ + uint64_t taddr; + + taddr = vm_phy_pages_alloc(vm, ri < 4 ? PAGES_PER_REGION : 1, + KVM_GUEST_PAGE_TABLE_MIN_PADDR, memslot); + memset(addr_gpa2hva(vm, taddr), 0xff, PAGES_PER_REGION * vm->page_size); + + return (taddr & REGION_ENTRY_ORIGIN) + | (((4 - ri) << 2) & REGION_ENTRY_TYPE) + | ((ri < 4 ? (PAGES_PER_REGION - 1) : 0) & REGION_ENTRY_LENGTH); +} + +void virt_pg_map(struct kvm_vm *vm, uint64_t gva, uint64_t gpa, + uint32_t memslot) +{ + int ri, idx; + uint64_t *entry; + + TEST_ASSERT((gva % vm->page_size) == 0, + "Virtual address not on page boundary,\n" + " vaddr: 0x%lx vm->page_size: 0x%x", + gva, vm->page_size); + TEST_ASSERT(sparsebit_is_set(vm->vpages_valid, + (gva >> vm->page_shift)), + "Invalid virtual address, vaddr: 0x%lx", + gva); + TEST_ASSERT((gpa % vm->page_size) == 0, + "Physical address not on page boundary,\n" + " paddr: 0x%lx vm->page_size: 0x%x", + gva, vm->page_size); + TEST_ASSERT((gpa >> vm->page_shift) <= vm->max_gfn, + "Physical address beyond beyond maximum supported,\n" + " paddr: 0x%lx vm->max_gfn: 0x%lx vm->page_size: 0x%x", + gva, vm->max_gfn, vm->page_size); + + /* Walk through region and segment tables */ + entry = addr_gpa2hva(vm, vm->pgd); + for (ri = 1; ri <= 4; ri++) { + idx = (gva >> (64 - 11 * ri)) & 0x7ffu; + if (entry[idx] & REGION_ENTRY_INVALID) + entry[idx] = virt_alloc_region(vm, ri, memslot); + entry = addr_gpa2hva(vm, entry[idx] & REGION_ENTRY_ORIGIN); + } + + /* Fill in page table entry */ + idx = (gva >> 12) & 0x0ffu; /* page index */ + if (!(entry[idx] & PAGE_INVALID)) + fprintf(stderr, + "WARNING: PTE for gpa=0x%"PRIx64" already set!\n", gpa); + entry[idx] = gpa; +} + +vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva) +{ + int ri, idx; + uint64_t *entry; + + TEST_ASSERT(vm->page_size == 4096, "Unsupported page size: 0x%x", + vm->page_size); + + entry = addr_gpa2hva(vm, vm->pgd); + for (ri = 1; ri <= 4; ri++) { + idx = (gva >> (64 - 11 * ri)) & 0x7ffu; + TEST_ASSERT(!(entry[idx] & REGION_ENTRY_INVALID), + "No region mapping for vm virtual address 0x%lx", + gva); + entry = addr_gpa2hva(vm, entry[idx] & REGION_ENTRY_ORIGIN); + } + + idx = (gva >> 12) & 0x0ffu; /* page index */ + + TEST_ASSERT(!(entry[idx] & PAGE_INVALID), + "No page mapping for vm virtual address 0x%lx", gva); + + return (entry[idx] & ~0xffful) + (gva & 0xffful); +} + +static void virt_dump_ptes(FILE *stream, struct kvm_vm *vm, uint8_t indent, + uint64_t ptea_start) +{ + uint64_t *pte, ptea; + + for (ptea = ptea_start; ptea < ptea_start + 0x100 * 8; ptea += 8) { + pte = addr_gpa2hva(vm, ptea); + if (*pte & PAGE_INVALID) + continue; + fprintf(stream, "%*spte @ 0x%lx: 0x%016lx\n", + indent, "", ptea, *pte); + } +} + +static void virt_dump_region(FILE *stream, struct kvm_vm *vm, uint8_t indent, + uint64_t reg_tab_addr) +{ + uint64_t addr, *entry; + + for (addr = reg_tab_addr; addr < reg_tab_addr + 0x400 * 8; addr += 8) { + entry = addr_gpa2hva(vm, addr); + if (*entry & REGION_ENTRY_INVALID) + continue; + fprintf(stream, "%*srt%lde @ 0x%lx: 0x%016lx\n", + indent, "", 4 - ((*entry & REGION_ENTRY_TYPE) >> 2), + addr, *entry); + if (*entry & REGION_ENTRY_TYPE) { + virt_dump_region(stream, vm, indent + 2, + *entry & REGION_ENTRY_ORIGIN); + } else { + virt_dump_ptes(stream, vm, indent + 2, + *entry & REGION_ENTRY_ORIGIN); + } + } +} + +void virt_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent) +{ + if (!vm->pgd_created) + return; + + virt_dump_region(stream, vm, indent, vm->pgd); +} + +struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages, + void *guest_code) +{ + /* + * The additional amount of pages required for the page tables is: + * 1 * n / 256 + 4 * (n / 256) / 2048 + 4 * (n / 256) / 2048^2 + ... + * which is definitely smaller than (n / 256) * 2. + */ + uint64_t extra_pg_pages = extra_mem_pages / 256 * 2; + struct kvm_vm *vm; + + vm = vm_create(VM_MODE_DEFAULT, + 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); + + return vm; +} + +void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code) +{ + size_t stack_size = DEFAULT_STACK_PGS * getpagesize(); + uint64_t stack_vaddr; + struct kvm_regs regs; + struct kvm_sregs sregs; + struct kvm_run *run; + + TEST_ASSERT(vm->page_size == 4096, "Unsupported page size: 0x%x", + vm->page_size); + + stack_vaddr = vm_vaddr_alloc(vm, stack_size, + DEFAULT_GUEST_STACK_VADDR_MIN, 0, 0); + + vm_vcpu_add(vm, vcpuid); + + /* Setup guest registers */ + vcpu_regs_get(vm, vcpuid, ®s); + regs.gprs[15] = stack_vaddr + (DEFAULT_STACK_PGS * getpagesize()) - 160; + vcpu_regs_set(vm, vcpuid, ®s); + + vcpu_sregs_get(vm, vcpuid, &sregs); + sregs.crs[0] |= 0x00040000; /* Enable floating point regs */ + sregs.crs[1] = vm->pgd | 0xf; /* Primary region table */ + vcpu_sregs_set(vm, vcpuid, &sregs); + + run = vcpu_state(vm, vcpuid); + run->psw_mask = 0x0400000180000000ULL; /* DAT enabled + 64 bit mode */ + run->psw_addr = (uintptr_t)guest_code; +} + +void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...) +{ + va_list ap; + struct kvm_regs regs; + int i; + + TEST_ASSERT(num >= 1 && num <= 5, "Unsupported number of args,\n" + " num: %u\n", + num); + + va_start(ap, num); + vcpu_regs_get(vm, vcpuid, ®s); + + for (i = 0; i < num; i++) + regs.gprs[i + 2] = va_arg(ap, uint64_t); + + vcpu_regs_set(vm, vcpuid, ®s); + va_end(ap); +} + +void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid, uint8_t indent) +{ + struct vcpu *vcpu = vcpu_find(vm, vcpuid); + + if (!vcpu) + return; + + fprintf(stream, "%*spstate: psw: 0x%.16llx:0x%.16llx\n", + indent, "", vcpu->state->psw_mask, vcpu->state->psw_addr); +} + +void assert_on_unhandled_exception(struct kvm_vm *vm, uint32_t vcpuid) +{ +} diff --git a/tools/testing/selftests/kvm/lib/s390x/ucall.c b/tools/testing/selftests/kvm/lib/s390x/ucall.c new file mode 100644 index 000000000..9d3b0f152 --- /dev/null +++ b/tools/testing/selftests/kvm/lib/s390x/ucall.c @@ -0,0 +1,59 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ucall support. A ucall is a "hypercall to userspace". + * + * Copyright (C) 2019 Red Hat, Inc. + */ +#include "kvm_util.h" + +void ucall_init(struct kvm_vm *vm, void *arg) +{ +} + +void ucall_uninit(struct kvm_vm *vm) +{ +} + +void ucall(uint64_t cmd, int nargs, ...) +{ + struct ucall uc = { + .cmd = cmd, + }; + va_list va; + int i; + + nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS; + + va_start(va, nargs); + for (i = 0; i < nargs; ++i) + uc.args[i] = va_arg(va, uint64_t); + va_end(va); + + /* Exit via DIAGNOSE 0x501 (normally used for breakpoints) */ + asm volatile ("diag 0,%0,0x501" : : "a"(&uc) : "memory"); +} + +uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc) +{ + struct kvm_run *run = vcpu_state(vm, vcpu_id); + struct ucall ucall = {}; + + if (uc) + memset(uc, 0, sizeof(*uc)); + + if (run->exit_reason == KVM_EXIT_S390_SIEIC && + run->s390_sieic.icptcode == 4 && + (run->s390_sieic.ipa >> 8) == 0x83 && /* 0x83 means DIAGNOSE */ + (run->s390_sieic.ipb >> 16) == 0x501) { + int reg = run->s390_sieic.ipa & 0xf; + + memcpy(&ucall, addr_gva2hva(vm, run->s.regs.gprs[reg]), + sizeof(ucall)); + + vcpu_run_complete_io(vm, vcpu_id); + if (uc) + memcpy(uc, &ucall, sizeof(ucall)); + } + + return ucall.cmd; +} |