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51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2021 Intel Corporation. */
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#include <asm/sgx.h>
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#include "cpuid.h"
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#include "kvm_cache_regs.h"
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#include "sgx.h"
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#include "vmx.h"
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#include "x86.h"
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bool __read_mostly enable_sgx;
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static inline bool encls_leaf_enabled_in_guest(struct kvm_vcpu *vcpu, u32 leaf)
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{
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if (!enable_sgx || !guest_cpuid_has(vcpu, X86_FEATURE_SGX))
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return false;
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if (leaf >= ECREATE && leaf <= ETRACK)
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return guest_cpuid_has(vcpu, X86_FEATURE_SGX1);
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if (leaf >= EAUG && leaf <= EMODT)
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return guest_cpuid_has(vcpu, X86_FEATURE_SGX2);
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return false;
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}
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static inline bool sgx_enabled_in_guest_bios(struct kvm_vcpu *vcpu)
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{
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const u64 bits = FEAT_CTL_SGX_ENABLED | FEAT_CTL_LOCKED;
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return (to_vmx(vcpu)->msr_ia32_feature_control & bits) == bits;
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}
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int handle_encls(struct kvm_vcpu *vcpu)
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{
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u32 leaf = (u32)kvm_rax_read(vcpu);
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if (!encls_leaf_enabled_in_guest(vcpu, leaf)) {
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kvm_queue_exception(vcpu, UD_VECTOR);
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} else if (!sgx_enabled_in_guest_bios(vcpu)) {
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kvm_inject_gp(vcpu, 0);
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} else {
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WARN(1, "KVM: unexpected exit on ENCLS[%u]", leaf);
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vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
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vcpu->run->hw.hardware_exit_reason = EXIT_REASON_ENCLS;
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return 0;
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}
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return 1;
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}
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