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6ec982b5a2
Use u8 instead of uint8_t to make the KVM selftests code more concise and more similar to the kernel (since selftests are primarily developed by kernel developers). This commit was generated with the following command: git ls-files tools/testing/selftests/kvm | xargs sed -i 's/uint8_t/u8/g' Then by manually adjusting whitespace to make checkpatch.pl happy. No functional change intended. Signed-off-by: David Matlack <dmatlack@google.com> Link: https://patch.msgid.link/20260420212004.3938325-11-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
53 lines
1.6 KiB
C
53 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(u64 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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u8 *insn_bytes;
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u64 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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