x86.c (861377730aa9db4cbaa0f3bd3f4d295c152732c4) x86.c (16809ecdc1e8ab7278f1d60021ac809edd17d060)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Kernel-based Virtual Machine driver for Linux
4 *
5 * derived from drivers/kvm/kvm_main.c
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
8 * Copyright (C) 2008 Qumranet, Inc.

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875void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
876{
877 (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f));
878}
879EXPORT_SYMBOL_GPL(kvm_lmsw);
880
881void kvm_load_guest_xsave_state(struct kvm_vcpu *vcpu)
882{
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Kernel-based Virtual Machine driver for Linux
4 *
5 * derived from drivers/kvm/kvm_main.c
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
8 * Copyright (C) 2008 Qumranet, Inc.

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875void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
876{
877 (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f));
878}
879EXPORT_SYMBOL_GPL(kvm_lmsw);
880
881void kvm_load_guest_xsave_state(struct kvm_vcpu *vcpu)
882{
883 if (vcpu->arch.guest_state_protected)
884 return;
885
883 if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE)) {
884
885 if (vcpu->arch.xcr0 != host_xcr0)
886 xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0);
887
888 if (vcpu->arch.xsaves_enabled &&
889 vcpu->arch.ia32_xss != host_xss)
890 wrmsrl(MSR_IA32_XSS, vcpu->arch.ia32_xss);

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895 (vcpu->arch.xcr0 & XFEATURE_MASK_PKRU)) &&
896 vcpu->arch.pkru != vcpu->arch.host_pkru)
897 __write_pkru(vcpu->arch.pkru);
898}
899EXPORT_SYMBOL_GPL(kvm_load_guest_xsave_state);
900
901void kvm_load_host_xsave_state(struct kvm_vcpu *vcpu)
902{
886 if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE)) {
887
888 if (vcpu->arch.xcr0 != host_xcr0)
889 xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0);
890
891 if (vcpu->arch.xsaves_enabled &&
892 vcpu->arch.ia32_xss != host_xss)
893 wrmsrl(MSR_IA32_XSS, vcpu->arch.ia32_xss);

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898 (vcpu->arch.xcr0 & XFEATURE_MASK_PKRU)) &&
899 vcpu->arch.pkru != vcpu->arch.host_pkru)
900 __write_pkru(vcpu->arch.pkru);
901}
902EXPORT_SYMBOL_GPL(kvm_load_guest_xsave_state);
903
904void kvm_load_host_xsave_state(struct kvm_vcpu *vcpu)
905{
906 if (vcpu->arch.guest_state_protected)
907 return;
908
903 if (static_cpu_has(X86_FEATURE_PKU) &&
904 (kvm_read_cr4_bits(vcpu, X86_CR4_PKE) ||
905 (vcpu->arch.xcr0 & XFEATURE_MASK_PKRU))) {
906 vcpu->arch.pkru = rdpkru();
907 if (vcpu->arch.pkru != vcpu->arch.host_pkru)
908 __write_pkru(vcpu->arch.host_pkru);
909 }
910

--- 10648 unchanged lines hidden --- 		909 if (static_cpu_has(X86_FEATURE_PKU) &&
910 (kvm_read_cr4_bits(vcpu, X86_CR4_PKE) ||
911 (vcpu->arch.xcr0 & XFEATURE_MASK_PKRU))) {
912 vcpu->arch.pkru = rdpkru();
913 if (vcpu->arch.pkru != vcpu->arch.host_pkru)
914 __write_pkru(vcpu->arch.host_pkru);
915 }
916

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