diff options
Diffstat (limited to 'tools/testing/selftests/kvm/x86_64/sync_regs_test.c')
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/sync_regs_test.c | 57 |
1 files changed, 31 insertions, 26 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c index c8478ce9ea77..11c2a70a7b87 100644 --- a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c +++ b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c @@ -1,10 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Test for x86 KVM_CAP_SYNC_REGS * * Copyright (C) 2018, Google LLC. * - * This work is licensed under the terms of the GNU GPL, version 2. - * * Verifies expected behavior of x86 KVM_CAP_SYNC_REGS functionality, * including requesting an invalid register set, updates to/from values * in kvm_run.s.regs when kvm_valid_regs and kvm_dirty_regs are toggled. @@ -25,9 +24,15 @@ void guest_code(void) { + /* + * use a callee-save register, otherwise the compiler + * saves it around the call to GUEST_SYNC. + */ + register u32 stage asm("rbx"); for (;;) { GUEST_SYNC(0); - asm volatile ("inc %r11"); + stage++; + asm volatile ("" : : "r" (stage)); } } @@ -147,7 +152,7 @@ int main(int argc, char *argv[]) compare_vcpu_events(&events, &run->s.regs.events); /* Set and verify various register values. */ - run->s.regs.regs.r11 = 0xBAD1DEA; + run->s.regs.regs.rbx = 0xBAD1DEA; run->s.regs.sregs.apic_base = 1 << 11; /* TODO run->s.regs.events.XYZ = ABC; */ @@ -158,9 +163,9 @@ int main(int argc, char *argv[]) "Unexpected exit reason: %u (%s),\n", run->exit_reason, exit_reason_str(run->exit_reason)); - TEST_ASSERT(run->s.regs.regs.r11 == 0xBAD1DEA + 1, - "r11 sync regs value incorrect 0x%llx.", - run->s.regs.regs.r11); + TEST_ASSERT(run->s.regs.regs.rbx == 0xBAD1DEA + 1, + "rbx sync regs value incorrect 0x%llx.", + run->s.regs.regs.rbx); TEST_ASSERT(run->s.regs.sregs.apic_base == 1 << 11, "apic_base sync regs value incorrect 0x%llx.", run->s.regs.sregs.apic_base); @@ -179,15 +184,15 @@ int main(int argc, char *argv[]) */ run->kvm_valid_regs = TEST_SYNC_FIELDS; run->kvm_dirty_regs = 0; - run->s.regs.regs.r11 = 0xDEADBEEF; + run->s.regs.regs.rbx = 0xDEADBEEF; rv = _vcpu_run(vm, VCPU_ID); TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, "Unexpected exit reason: %u (%s),\n", run->exit_reason, exit_reason_str(run->exit_reason)); - TEST_ASSERT(run->s.regs.regs.r11 != 0xDEADBEEF, - "r11 sync regs value incorrect 0x%llx.", - run->s.regs.regs.r11); + TEST_ASSERT(run->s.regs.regs.rbx != 0xDEADBEEF, + "rbx sync regs value incorrect 0x%llx.", + run->s.regs.regs.rbx); /* Clear kvm_valid_regs bits and kvm_dirty_bits. * Verify s.regs values are not overwritten with existing guest values @@ -195,21 +200,21 @@ int main(int argc, char *argv[]) */ run->kvm_valid_regs = 0; run->kvm_dirty_regs = 0; - run->s.regs.regs.r11 = 0xAAAA; - regs.r11 = 0xBAC0; + run->s.regs.regs.rbx = 0xAAAA; + regs.rbx = 0xBAC0; vcpu_regs_set(vm, VCPU_ID, ®s); rv = _vcpu_run(vm, VCPU_ID); TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, "Unexpected exit reason: %u (%s),\n", run->exit_reason, exit_reason_str(run->exit_reason)); - TEST_ASSERT(run->s.regs.regs.r11 == 0xAAAA, - "r11 sync regs value incorrect 0x%llx.", - run->s.regs.regs.r11); + TEST_ASSERT(run->s.regs.regs.rbx == 0xAAAA, + "rbx sync regs value incorrect 0x%llx.", + run->s.regs.regs.rbx); vcpu_regs_get(vm, VCPU_ID, ®s); - TEST_ASSERT(regs.r11 == 0xBAC0 + 1, - "r11 guest value incorrect 0x%llx.", - regs.r11); + TEST_ASSERT(regs.rbx == 0xBAC0 + 1, + "rbx guest value incorrect 0x%llx.", + regs.rbx); /* Clear kvm_valid_regs bits. Verify s.regs values are not overwritten * with existing guest values but that guest values are overwritten @@ -217,19 +222,19 @@ int main(int argc, char *argv[]) */ run->kvm_valid_regs = 0; run->kvm_dirty_regs = TEST_SYNC_FIELDS; - run->s.regs.regs.r11 = 0xBBBB; + run->s.regs.regs.rbx = 0xBBBB; rv = _vcpu_run(vm, VCPU_ID); TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, "Unexpected exit reason: %u (%s),\n", run->exit_reason, exit_reason_str(run->exit_reason)); - TEST_ASSERT(run->s.regs.regs.r11 == 0xBBBB, - "r11 sync regs value incorrect 0x%llx.", - run->s.regs.regs.r11); + TEST_ASSERT(run->s.regs.regs.rbx == 0xBBBB, + "rbx sync regs value incorrect 0x%llx.", + run->s.regs.regs.rbx); vcpu_regs_get(vm, VCPU_ID, ®s); - TEST_ASSERT(regs.r11 == 0xBBBB + 1, - "r11 guest value incorrect 0x%llx.", - regs.r11); + TEST_ASSERT(regs.rbx == 0xBBBB + 1, + "rbx guest value incorrect 0x%llx.", + regs.rbx); kvm_vm_free(vm); |