diff options
Diffstat (limited to 'tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c')
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c | 690 |
1 files changed, 690 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c new file mode 100644 index 000000000000..68f97ff720a7 --- /dev/null +++ b/tools/testing/selftests/kvm/x86_64/hyperv_tlb_flush.c @@ -0,0 +1,690 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Hyper-V HvFlushVirtualAddress{List,Space}{,Ex} tests + * + * Copyright (C) 2022, Red Hat, Inc. + * + */ + +#define _GNU_SOURCE /* for program_invocation_short_name */ +#include <asm/barrier.h> +#include <pthread.h> +#include <inttypes.h> + +#include "kvm_util.h" +#include "processor.h" +#include "hyperv.h" +#include "test_util.h" +#include "vmx.h" + +#define WORKER_VCPU_ID_1 2 +#define WORKER_VCPU_ID_2 65 + +#define NTRY 100 +#define NTEST_PAGES 2 + +struct hv_vpset { + u64 format; + u64 valid_bank_mask; + u64 bank_contents[]; +}; + +enum HV_GENERIC_SET_FORMAT { + HV_GENERIC_SET_SPARSE_4K, + HV_GENERIC_SET_ALL, +}; + +#define HV_FLUSH_ALL_PROCESSORS BIT(0) +#define HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES BIT(1) +#define HV_FLUSH_NON_GLOBAL_MAPPINGS_ONLY BIT(2) +#define HV_FLUSH_USE_EXTENDED_RANGE_FORMAT BIT(3) + +/* HvFlushVirtualAddressSpace, HvFlushVirtualAddressList hypercalls */ +struct hv_tlb_flush { + u64 address_space; + u64 flags; + u64 processor_mask; + u64 gva_list[]; +} __packed; + +/* HvFlushVirtualAddressSpaceEx, HvFlushVirtualAddressListEx hypercalls */ +struct hv_tlb_flush_ex { + u64 address_space; + u64 flags; + struct hv_vpset hv_vp_set; + u64 gva_list[]; +} __packed; + +/* + * Pass the following info to 'workers' and 'sender' + * - Hypercall page's GVA + * - Hypercall page's GPA + * - Test pages GVA + * - GVAs of the test pages' PTEs + */ +struct test_data { + vm_vaddr_t hcall_gva; + vm_paddr_t hcall_gpa; + vm_vaddr_t test_pages; + vm_vaddr_t test_pages_pte[NTEST_PAGES]; +}; + +/* 'Worker' vCPU code checking the contents of the test page */ +static void worker_guest_code(vm_vaddr_t test_data) +{ + struct test_data *data = (struct test_data *)test_data; + u32 vcpu_id = rdmsr(HV_X64_MSR_VP_INDEX); + void *exp_page = (void *)data->test_pages + PAGE_SIZE * NTEST_PAGES; + u64 *this_cpu = (u64 *)(exp_page + vcpu_id * sizeof(u64)); + u64 expected, val; + + x2apic_enable(); + wrmsr(HV_X64_MSR_GUEST_OS_ID, HYPERV_LINUX_OS_ID); + + for (;;) { + cpu_relax(); + + expected = READ_ONCE(*this_cpu); + + /* + * Make sure the value in the test page is read after reading + * the expectation for the first time. Pairs with wmb() in + * prepare_to_test(). + */ + rmb(); + + val = READ_ONCE(*(u64 *)data->test_pages); + + /* + * Make sure the value in the test page is read after before + * reading the expectation for the second time. Pairs with wmb() + * post_test(). + */ + rmb(); + + /* + * '0' indicates the sender is between iterations, wait until + * the sender is ready for this vCPU to start checking again. + */ + if (!expected) + continue; + + /* + * Re-read the per-vCPU byte to ensure the sender didn't move + * onto a new iteration. + */ + if (expected != READ_ONCE(*this_cpu)) + continue; + + GUEST_ASSERT(val == expected); + } +} + +/* + * Write per-CPU info indicating what each 'worker' CPU is supposed to see in + * test page. '0' means don't check. + */ +static void set_expected_val(void *addr, u64 val, int vcpu_id) +{ + void *exp_page = addr + PAGE_SIZE * NTEST_PAGES; + + *(u64 *)(exp_page + vcpu_id * sizeof(u64)) = val; +} + +/* + * Update PTEs swapping two test pages. + * TODO: use swap()/xchg() when these are provided. + */ +static void swap_two_test_pages(vm_paddr_t pte_gva1, vm_paddr_t pte_gva2) +{ + uint64_t tmp = *(uint64_t *)pte_gva1; + + *(uint64_t *)pte_gva1 = *(uint64_t *)pte_gva2; + *(uint64_t *)pte_gva2 = tmp; +} + +/* + * TODO: replace the silly NOP loop with a proper udelay() implementation. + */ +static inline void do_delay(void) +{ + int i; + + for (i = 0; i < 1000000; i++) + asm volatile("nop"); +} + +/* + * Prepare to test: 'disable' workers by setting the expectation to '0', + * clear hypercall input page and then swap two test pages. + */ +static inline void prepare_to_test(struct test_data *data) +{ + /* Clear hypercall input page */ + memset((void *)data->hcall_gva, 0, PAGE_SIZE); + + /* 'Disable' workers */ + set_expected_val((void *)data->test_pages, 0x0, WORKER_VCPU_ID_1); + set_expected_val((void *)data->test_pages, 0x0, WORKER_VCPU_ID_2); + + /* Make sure workers are 'disabled' before we swap PTEs. */ + wmb(); + + /* Make sure workers have enough time to notice */ + do_delay(); + + /* Swap test page mappings */ + swap_two_test_pages(data->test_pages_pte[0], data->test_pages_pte[1]); +} + +/* + * Finalize the test: check hypercall resule set the expected val for + * 'worker' CPUs and give them some time to test. + */ +static inline void post_test(struct test_data *data, u64 exp1, u64 exp2) +{ + /* Make sure we change the expectation after swapping PTEs */ + wmb(); + + /* Set the expectation for workers, '0' means don't test */ + set_expected_val((void *)data->test_pages, exp1, WORKER_VCPU_ID_1); + set_expected_val((void *)data->test_pages, exp2, WORKER_VCPU_ID_2); + + /* Make sure workers have enough time to test */ + do_delay(); +} + +#define TESTVAL1 0x0101010101010101 +#define TESTVAL2 0x0202020202020202 + +/* Main vCPU doing the test */ +static void sender_guest_code(vm_vaddr_t test_data) +{ + struct test_data *data = (struct test_data *)test_data; + struct hv_tlb_flush *flush = (struct hv_tlb_flush *)data->hcall_gva; + struct hv_tlb_flush_ex *flush_ex = (struct hv_tlb_flush_ex *)data->hcall_gva; + vm_paddr_t hcall_gpa = data->hcall_gpa; + int i, stage = 1; + + wrmsr(HV_X64_MSR_GUEST_OS_ID, HYPERV_LINUX_OS_ID); + wrmsr(HV_X64_MSR_HYPERCALL, data->hcall_gpa); + + /* "Slow" hypercalls */ + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE for WORKER_VCPU_ID_1 */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; + flush->processor_mask = BIT(WORKER_VCPU_ID_1); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE, hcall_gpa, + hcall_gpa + PAGE_SIZE); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, 0x0); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST for WORKER_VCPU_ID_1 */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; + flush->processor_mask = BIT(WORKER_VCPU_ID_1); + flush->gva_list[0] = (u64)data->test_pages; + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST | + (1UL << HV_HYPERCALL_REP_COMP_OFFSET), + hcall_gpa, hcall_gpa + PAGE_SIZE); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, 0x0); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE for HV_FLUSH_ALL_PROCESSORS */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES | + HV_FLUSH_ALL_PROCESSORS; + flush->processor_mask = 0; + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE, hcall_gpa, + hcall_gpa + PAGE_SIZE); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST for HV_FLUSH_ALL_PROCESSORS */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES | + HV_FLUSH_ALL_PROCESSORS; + flush->gva_list[0] = (u64)data->test_pages; + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST | + (1UL << HV_HYPERCALL_REP_COMP_OFFSET), + hcall_gpa, hcall_gpa + PAGE_SIZE); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, + i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX for WORKER_VCPU_ID_2 */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; + flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; + flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_2 / 64); + flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_2 % 64); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX | + (1 << HV_HYPERCALL_VARHEAD_OFFSET), + hcall_gpa, hcall_gpa + PAGE_SIZE); + post_test(data, 0x0, i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX for WORKER_VCPU_ID_2 */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; + flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; + flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_2 / 64); + flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_2 % 64); + /* bank_contents and gva_list occupy the same space, thus [1] */ + flush_ex->gva_list[1] = (u64)data->test_pages; + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX | + (1 << HV_HYPERCALL_VARHEAD_OFFSET) | + (1UL << HV_HYPERCALL_REP_COMP_OFFSET), + hcall_gpa, hcall_gpa + PAGE_SIZE); + post_test(data, 0x0, i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX for both vCPUs */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; + flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; + flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_2 / 64) | + BIT_ULL(WORKER_VCPU_ID_1 / 64); + flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_1 % 64); + flush_ex->hv_vp_set.bank_contents[1] = BIT_ULL(WORKER_VCPU_ID_2 % 64); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX | + (2 << HV_HYPERCALL_VARHEAD_OFFSET), + hcall_gpa, hcall_gpa + PAGE_SIZE); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, + i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX for both vCPUs */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; + flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; + flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_1 / 64) | + BIT_ULL(WORKER_VCPU_ID_2 / 64); + flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_1 % 64); + flush_ex->hv_vp_set.bank_contents[1] = BIT_ULL(WORKER_VCPU_ID_2 % 64); + /* bank_contents and gva_list occupy the same space, thus [2] */ + flush_ex->gva_list[2] = (u64)data->test_pages; + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX | + (2 << HV_HYPERCALL_VARHEAD_OFFSET) | + (1UL << HV_HYPERCALL_REP_COMP_OFFSET), + hcall_gpa, hcall_gpa + PAGE_SIZE); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, + i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX for HV_GENERIC_SET_ALL */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; + flush_ex->hv_vp_set.format = HV_GENERIC_SET_ALL; + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX, + hcall_gpa, hcall_gpa + PAGE_SIZE); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, + i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX for HV_GENERIC_SET_ALL */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; + flush_ex->hv_vp_set.format = HV_GENERIC_SET_ALL; + flush_ex->gva_list[0] = (u64)data->test_pages; + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX | + (1UL << HV_HYPERCALL_REP_COMP_OFFSET), + hcall_gpa, hcall_gpa + PAGE_SIZE); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, + i % 2 ? TESTVAL1 : TESTVAL2); + } + + /* "Fast" hypercalls */ + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE for WORKER_VCPU_ID_1 */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush->processor_mask = BIT(WORKER_VCPU_ID_1); + hyperv_write_xmm_input(&flush->processor_mask, 1); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE | + HV_HYPERCALL_FAST_BIT, 0x0, + HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, 0x0); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST for WORKER_VCPU_ID_1 */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush->processor_mask = BIT(WORKER_VCPU_ID_1); + flush->gva_list[0] = (u64)data->test_pages; + hyperv_write_xmm_input(&flush->processor_mask, 1); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST | + HV_HYPERCALL_FAST_BIT | + (1UL << HV_HYPERCALL_REP_COMP_OFFSET), + 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, 0x0); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE for HV_FLUSH_ALL_PROCESSORS */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + hyperv_write_xmm_input(&flush->processor_mask, 1); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE | + HV_HYPERCALL_FAST_BIT, 0x0, + HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES | + HV_FLUSH_ALL_PROCESSORS); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, + i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST for HV_FLUSH_ALL_PROCESSORS */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush->gva_list[0] = (u64)data->test_pages; + hyperv_write_xmm_input(&flush->processor_mask, 1); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST | + HV_HYPERCALL_FAST_BIT | + (1UL << HV_HYPERCALL_REP_COMP_OFFSET), 0x0, + HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES | + HV_FLUSH_ALL_PROCESSORS); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, + i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX for WORKER_VCPU_ID_2 */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; + flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_2 / 64); + flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_2 % 64); + hyperv_write_xmm_input(&flush_ex->hv_vp_set, 2); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX | + HV_HYPERCALL_FAST_BIT | + (1 << HV_HYPERCALL_VARHEAD_OFFSET), + 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); + post_test(data, 0x0, i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX for WORKER_VCPU_ID_2 */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; + flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_2 / 64); + flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_2 % 64); + /* bank_contents and gva_list occupy the same space, thus [1] */ + flush_ex->gva_list[1] = (u64)data->test_pages; + hyperv_write_xmm_input(&flush_ex->hv_vp_set, 2); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX | + HV_HYPERCALL_FAST_BIT | + (1 << HV_HYPERCALL_VARHEAD_OFFSET) | + (1UL << HV_HYPERCALL_REP_COMP_OFFSET), + 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); + post_test(data, 0x0, i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX for both vCPUs */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; + flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_2 / 64) | + BIT_ULL(WORKER_VCPU_ID_1 / 64); + flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_1 % 64); + flush_ex->hv_vp_set.bank_contents[1] = BIT_ULL(WORKER_VCPU_ID_2 % 64); + hyperv_write_xmm_input(&flush_ex->hv_vp_set, 2); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX | + HV_HYPERCALL_FAST_BIT | + (2 << HV_HYPERCALL_VARHEAD_OFFSET), + 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); + post_test(data, i % 2 ? TESTVAL1 : + TESTVAL2, i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX for both vCPUs */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush_ex->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K; + flush_ex->hv_vp_set.valid_bank_mask = BIT_ULL(WORKER_VCPU_ID_1 / 64) | + BIT_ULL(WORKER_VCPU_ID_2 / 64); + flush_ex->hv_vp_set.bank_contents[0] = BIT_ULL(WORKER_VCPU_ID_1 % 64); + flush_ex->hv_vp_set.bank_contents[1] = BIT_ULL(WORKER_VCPU_ID_2 % 64); + /* bank_contents and gva_list occupy the same space, thus [2] */ + flush_ex->gva_list[2] = (u64)data->test_pages; + hyperv_write_xmm_input(&flush_ex->hv_vp_set, 3); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX | + HV_HYPERCALL_FAST_BIT | + (2 << HV_HYPERCALL_VARHEAD_OFFSET) | + (1UL << HV_HYPERCALL_REP_COMP_OFFSET), + 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, + i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX for HV_GENERIC_SET_ALL */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; + flush_ex->hv_vp_set.format = HV_GENERIC_SET_ALL; + hyperv_write_xmm_input(&flush_ex->hv_vp_set, 2); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX | + HV_HYPERCALL_FAST_BIT, + 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, + i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_SYNC(stage++); + + /* HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX for HV_GENERIC_SET_ALL */ + for (i = 0; i < NTRY; i++) { + prepare_to_test(data); + flush_ex->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; + flush_ex->hv_vp_set.format = HV_GENERIC_SET_ALL; + flush_ex->gva_list[0] = (u64)data->test_pages; + hyperv_write_xmm_input(&flush_ex->hv_vp_set, 2); + hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX | + HV_HYPERCALL_FAST_BIT | + (1UL << HV_HYPERCALL_REP_COMP_OFFSET), + 0x0, HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES); + post_test(data, i % 2 ? TESTVAL1 : TESTVAL2, + i % 2 ? TESTVAL1 : TESTVAL2); + } + + GUEST_DONE(); +} + +static void *vcpu_thread(void *arg) +{ + struct kvm_vcpu *vcpu = (struct kvm_vcpu *)arg; + struct ucall uc; + int old; + int r; + unsigned int exit_reason; + + r = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old); + TEST_ASSERT(!r, "pthread_setcanceltype failed on vcpu_id=%u with errno=%d", + vcpu->id, r); + + vcpu_run(vcpu); + exit_reason = vcpu->run->exit_reason; + + TEST_ASSERT(exit_reason == KVM_EXIT_IO, + "vCPU %u exited with unexpected exit reason %u-%s, expected KVM_EXIT_IO", + vcpu->id, exit_reason, exit_reason_str(exit_reason)); + + switch (get_ucall(vcpu, &uc)) { + case UCALL_ABORT: + REPORT_GUEST_ASSERT(uc); + /* NOT REACHED */ + default: + TEST_FAIL("Unexpected ucall %lu, vCPU %d", uc.cmd, vcpu->id); + } + + return NULL; +} + +static void cancel_join_vcpu_thread(pthread_t thread, struct kvm_vcpu *vcpu) +{ + void *retval; + int r; + + r = pthread_cancel(thread); + TEST_ASSERT(!r, "pthread_cancel on vcpu_id=%d failed with errno=%d", + vcpu->id, r); + + r = pthread_join(thread, &retval); + TEST_ASSERT(!r, "pthread_join on vcpu_id=%d failed with errno=%d", + vcpu->id, r); + TEST_ASSERT(retval == PTHREAD_CANCELED, + "expected retval=%p, got %p", PTHREAD_CANCELED, + retval); +} + +int main(int argc, char *argv[]) +{ + struct kvm_vm *vm; + struct kvm_vcpu *vcpu[3]; + unsigned int exit_reason; + pthread_t threads[2]; + vm_vaddr_t test_data_page, gva; + vm_paddr_t gpa; + uint64_t *pte; + struct test_data *data; + struct ucall uc; + int stage = 1, r, i; + + vm = vm_create_with_one_vcpu(&vcpu[0], sender_guest_code); + + /* Test data page */ + test_data_page = vm_vaddr_alloc_page(vm); + data = (struct test_data *)addr_gva2hva(vm, test_data_page); + + /* Hypercall input/output */ + data->hcall_gva = vm_vaddr_alloc_pages(vm, 2); + data->hcall_gpa = addr_gva2gpa(vm, data->hcall_gva); + memset(addr_gva2hva(vm, data->hcall_gva), 0x0, 2 * PAGE_SIZE); + + /* + * Test pages: the first one is filled with '0x01's, the second with '0x02's + * and the test will swap their mappings. The third page keeps the indication + * about the current state of mappings. + */ + data->test_pages = vm_vaddr_alloc_pages(vm, NTEST_PAGES + 1); + for (i = 0; i < NTEST_PAGES; i++) + memset(addr_gva2hva(vm, data->test_pages + PAGE_SIZE * i), + (u8)(i + 1), PAGE_SIZE); + set_expected_val(addr_gva2hva(vm, data->test_pages), 0x0, WORKER_VCPU_ID_1); + set_expected_val(addr_gva2hva(vm, data->test_pages), 0x0, WORKER_VCPU_ID_2); + + /* + * Get PTE pointers for test pages and map them inside the guest. + * Use separate page for each PTE for simplicity. + */ + gva = vm_vaddr_unused_gap(vm, NTEST_PAGES * PAGE_SIZE, KVM_UTIL_MIN_VADDR); + for (i = 0; i < NTEST_PAGES; i++) { + pte = vm_get_page_table_entry(vm, data->test_pages + i * PAGE_SIZE); + gpa = addr_hva2gpa(vm, pte); + __virt_pg_map(vm, gva + PAGE_SIZE * i, gpa & PAGE_MASK, PG_LEVEL_4K); + data->test_pages_pte[i] = gva + (gpa & ~PAGE_MASK); + } + + /* + * Sender vCPU which performs the test: swaps test pages, sets expectation + * for 'workers' and issues TLB flush hypercalls. + */ + vcpu_args_set(vcpu[0], 1, test_data_page); + vcpu_set_hv_cpuid(vcpu[0]); + + /* Create worker vCPUs which check the contents of the test pages */ + vcpu[1] = vm_vcpu_add(vm, WORKER_VCPU_ID_1, worker_guest_code); + vcpu_args_set(vcpu[1], 1, test_data_page); + vcpu_set_msr(vcpu[1], HV_X64_MSR_VP_INDEX, WORKER_VCPU_ID_1); + vcpu_set_hv_cpuid(vcpu[1]); + + vcpu[2] = vm_vcpu_add(vm, WORKER_VCPU_ID_2, worker_guest_code); + vcpu_args_set(vcpu[2], 1, test_data_page); + vcpu_set_msr(vcpu[2], HV_X64_MSR_VP_INDEX, WORKER_VCPU_ID_2); + vcpu_set_hv_cpuid(vcpu[2]); + + r = pthread_create(&threads[0], NULL, vcpu_thread, vcpu[1]); + TEST_ASSERT(!r, "pthread_create() failed"); + + r = pthread_create(&threads[1], NULL, vcpu_thread, vcpu[2]); + TEST_ASSERT(!r, "pthread_create() failed"); + + while (true) { + vcpu_run(vcpu[0]); + exit_reason = vcpu[0]->run->exit_reason; + + TEST_ASSERT(exit_reason == KVM_EXIT_IO, + "unexpected exit reason: %u (%s)", + exit_reason, exit_reason_str(exit_reason)); + + switch (get_ucall(vcpu[0], &uc)) { + case UCALL_SYNC: + TEST_ASSERT(uc.args[1] == stage, + "Unexpected stage: %ld (%d expected)\n", + uc.args[1], stage); + break; + case UCALL_ABORT: + REPORT_GUEST_ASSERT(uc); + /* NOT REACHED */ + case UCALL_DONE: + goto done; + default: + TEST_FAIL("Unknown ucall %lu", uc.cmd); + } + + stage++; + } + +done: + cancel_join_vcpu_thread(threads[0], vcpu[1]); + cancel_join_vcpu_thread(threads[1], vcpu[2]); + kvm_vm_free(vm); + + return 0; +} |