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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>
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef SELFTEST_KVM_FLDS_EMULATION_H
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#define SELFTEST_KVM_FLDS_EMULATION_H
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#include "kvm_util.h"
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#define FLDS_MEM_EAX ".byte 0xd9, 0x00"
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/*
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* flds is an instruction that the KVM instruction emulator is known not to
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* support. This can be used in guest code along with a mechanism to force
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* KVM to emulate the instruction (e.g. by providing an MMIO address) to
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* exercise emulation failures.
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*/
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static inline void flds(uint64_t address)
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{
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__asm__ __volatile__(FLDS_MEM_EAX :: "a"(address));
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}
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static inline void handle_flds_emulation_failure_exit(struct kvm_vcpu *vcpu)
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{
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struct kvm_run *run = vcpu->run;
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struct kvm_regs regs;
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uint8_t *insn_bytes;
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uint64_t flags;
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TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_INTERNAL_ERROR);
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TEST_ASSERT(run->emulation_failure.suberror == KVM_INTERNAL_ERROR_EMULATION,
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"Unexpected suberror: %u",
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run->emulation_failure.suberror);
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flags = run->emulation_failure.flags;
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TEST_ASSERT(run->emulation_failure.ndata >= 3 &&
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flags & KVM_INTERNAL_ERROR_EMULATION_FLAG_INSTRUCTION_BYTES,
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"run->emulation_failure is missing instruction bytes");
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TEST_ASSERT(run->emulation_failure.insn_size >= 2,
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"Expected a 2-byte opcode for 'flds', got %d bytes",
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run->emulation_failure.insn_size);
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insn_bytes = run->emulation_failure.insn_bytes;
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TEST_ASSERT(insn_bytes[0] == 0xd9 && insn_bytes[1] == 0,
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"Expected 'flds [eax]', opcode '0xd9 0x00', got opcode 0x%02x 0x%02x",
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insn_bytes[0], insn_bytes[1]);
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vcpu_regs_get(vcpu, ®s);
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regs.rip += 2;
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vcpu_regs_set(vcpu, ®s);
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}
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#endif /* !SELFTEST_KVM_FLDS_EMULATION_H */
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