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67730e6c53
Use the kernel's canonical $(ARCH) paths instead of the raw target triple for KVM selftests directories. KVM selftests are quite nearly the only place in the entire kernel that using the target triple for directories, tools/testing/selftests/drivers/s390x being the lone holdout. Using the kernel's preferred nomenclature eliminates the minor, but annoying, friction of having to translate to KVM's selftests directories, e.g. for pattern matching, opening files, running selftests, etc. Opportunsitically delete file comments that reference the full path of the file, as they are obviously prone to becoming stale, and serve no known purpose. Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Acked-by: Andrew Jones <ajones@ventanamicro.com> Link: https://lore.kernel.org/r/20241128005547.4077116-16-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* svm_int_ctl_test
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*
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* Copyright (C) 2021, Red Hat, Inc.
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*
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* Nested SVM testing: test simultaneous use of V_IRQ from L1 and L0.
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*/
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#include "test_util.h"
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#include "kvm_util.h"
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#include "processor.h"
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#include "svm_util.h"
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#include "apic.h"
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bool vintr_irq_called;
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bool intr_irq_called;
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#define VINTR_IRQ_NUMBER 0x20
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#define INTR_IRQ_NUMBER 0x30
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static void vintr_irq_handler(struct ex_regs *regs)
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{
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vintr_irq_called = true;
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}
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static void intr_irq_handler(struct ex_regs *regs)
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{
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x2apic_write_reg(APIC_EOI, 0x00);
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intr_irq_called = true;
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}
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static void l2_guest_code(struct svm_test_data *svm)
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{
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/* This code raises interrupt INTR_IRQ_NUMBER in the L1's LAPIC,
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* and since L1 didn't enable virtual interrupt masking,
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* L2 should receive it and not L1.
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*
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* L2 also has virtual interrupt 'VINTR_IRQ_NUMBER' pending in V_IRQ
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* so it should also receive it after the following 'sti'.
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*/
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x2apic_write_reg(APIC_ICR,
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APIC_DEST_SELF | APIC_INT_ASSERT | INTR_IRQ_NUMBER);
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__asm__ __volatile__(
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"sti\n"
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"nop\n"
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);
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GUEST_ASSERT(vintr_irq_called);
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GUEST_ASSERT(intr_irq_called);
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__asm__ __volatile__(
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"vmcall\n"
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);
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}
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static void l1_guest_code(struct svm_test_data *svm)
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{
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#define L2_GUEST_STACK_SIZE 64
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unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
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struct vmcb *vmcb = svm->vmcb;
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x2apic_enable();
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/* Prepare for L2 execution. */
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generic_svm_setup(svm, l2_guest_code,
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&l2_guest_stack[L2_GUEST_STACK_SIZE]);
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/* No virtual interrupt masking */
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vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;
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/* No intercepts for real and virtual interrupts */
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vmcb->control.intercept &= ~(BIT(INTERCEPT_INTR) | BIT(INTERCEPT_VINTR));
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/* Make a virtual interrupt VINTR_IRQ_NUMBER pending */
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vmcb->control.int_ctl |= V_IRQ_MASK | (0x1 << V_INTR_PRIO_SHIFT);
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vmcb->control.int_vector = VINTR_IRQ_NUMBER;
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run_guest(vmcb, svm->vmcb_gpa);
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GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
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GUEST_DONE();
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}
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int main(int argc, char *argv[])
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{
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struct kvm_vcpu *vcpu;
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vm_vaddr_t svm_gva;
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struct kvm_vm *vm;
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struct ucall uc;
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TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SVM));
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vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);
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vm_install_exception_handler(vm, VINTR_IRQ_NUMBER, vintr_irq_handler);
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vm_install_exception_handler(vm, INTR_IRQ_NUMBER, intr_irq_handler);
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vcpu_alloc_svm(vm, &svm_gva);
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vcpu_args_set(vcpu, 1, svm_gva);
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vcpu_run(vcpu);
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TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
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switch (get_ucall(vcpu, &uc)) {
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case UCALL_ABORT:
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REPORT_GUEST_ASSERT(uc);
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break;
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/* NOT REACHED */
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case UCALL_DONE:
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goto done;
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default:
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TEST_FAIL("Unknown ucall 0x%lx.", uc.cmd);
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}
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done:
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kvm_vm_free(vm);
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return 0;
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}
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