C++ (Cpp) kvm_read_cr4_bitsの例

コード例 #1

ファイル: cpuid.c プロジェクト: jaehong/imx23-audio

void kvm_update_cpuid(struct kvm_vcpu *vcpu)
{
    struct kvm_cpuid_entry2 *best;
    struct kvm_lapic *apic = vcpu->arch.apic;

    best = kvm_find_cpuid_entry(vcpu, 1, 0);
    if (!best)
        return;

    /* Update OSXSAVE bit */
    if (cpu_has_xsave && best->function == 0x1) {
        best->ecx &= ~(bit(X86_FEATURE_OSXSAVE));
        if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE))
            best->ecx |= bit(X86_FEATURE_OSXSAVE);
    }

    if (apic) {
        if (best->ecx & bit(X86_FEATURE_TSC_DEADLINE_TIMER))
            apic->lapic_timer.timer_mode_mask = 3 << 17;
        else
            apic->lapic_timer.timer_mode_mask = 1 << 17;
    }

    kvm_pmu_cpuid_update(vcpu);
}

コード例 #2

ファイル: x86.c プロジェクト: rchordiya/linux

bool kvm_require_dr(struct kvm_vcpu *vcpu, int dr)
{
	if ((dr != 4 && dr != 5) || !kvm_read_cr4_bits(vcpu, X86_CR4_DE))
		return true;

	kvm_queue_exception(vcpu, UD_VECTOR);
	return false;
}

コード例 #3

ファイル: cpuid.c プロジェクト: 1800alex/linux

void kvm_update_cpuid(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;
	struct kvm_lapic *apic = vcpu->arch.apic;

	best = kvm_find_cpuid_entry(vcpu, 1, 0);
	if (!best)
		return;

	/* Update OSXSAVE bit */
	if (cpu_has_xsave && best->function == 0x1) {
		best->ecx &= ~(bit(X86_FEATURE_OSXSAVE));
		if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE))
			best->ecx |= bit(X86_FEATURE_OSXSAVE);
	}

	if (apic) {
		if (best->ecx & bit(X86_FEATURE_TSC_DEADLINE_TIMER))
			apic->lapic_timer.timer_mode_mask = 3 << 17;
		else
			apic->lapic_timer.timer_mode_mask = 1 << 17;
	}

	best = kvm_find_cpuid_entry(vcpu, 0xD, 0);
	if (!best) {
		vcpu->arch.guest_supported_xcr0 = 0;
		vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET;
	} else {
		vcpu->arch.guest_supported_xcr0 =
			(best->eax | ((u64)best->edx << 32)) &
			kvm_supported_xcr0();
		vcpu->arch.guest_xstate_size = best->ebx =
			xstate_required_size(vcpu->arch.xcr0);
	}

	kvm_pmu_cpuid_update(vcpu);
}

コード例 #4

ファイル: cpuid.c プロジェクト: Anjali05/linux

int kvm_update_cpuid(struct kvm_vcpu *vcpu)
{
	struct kvm_cpuid_entry2 *best;
	struct kvm_lapic *apic = vcpu->arch.apic;

	best = kvm_find_cpuid_entry(vcpu, 1, 0);
	if (!best)
		return 0;

	/* Update OSXSAVE bit */
	if (boot_cpu_has(X86_FEATURE_XSAVE) && best->function == 0x1) {
		best->ecx &= ~F(OSXSAVE);
		if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE))
			best->ecx |= F(OSXSAVE);
	}

	best->edx &= ~F(APIC);
	if (vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE)
		best->edx |= F(APIC);

	if (apic) {
		if (best->ecx & F(TSC_DEADLINE_TIMER))
			apic->lapic_timer.timer_mode_mask = 3 << 17;
		else
			apic->lapic_timer.timer_mode_mask = 1 << 17;
	}

	best = kvm_find_cpuid_entry(vcpu, 7, 0);
	if (best) {
		/* Update OSPKE bit */
		if (boot_cpu_has(X86_FEATURE_PKU) && best->function == 0x7) {
			best->ecx &= ~F(OSPKE);
			if (kvm_read_cr4_bits(vcpu, X86_CR4_PKE))
				best->ecx |= F(OSPKE);
		}
	}

	best = kvm_find_cpuid_entry(vcpu, 0xD, 0);
	if (!best) {
		vcpu->arch.guest_supported_xcr0 = 0;
		vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET;
	} else {
		vcpu->arch.guest_supported_xcr0 =
			(best->eax | ((u64)best->edx << 32)) &
			kvm_supported_xcr0();
		vcpu->arch.guest_xstate_size = best->ebx =
			xstate_required_size(vcpu->arch.xcr0, false);
	}

	best = kvm_find_cpuid_entry(vcpu, 0xD, 1);
	if (best && (best->eax & (F(XSAVES) | F(XSAVEC))))
		best->ebx = xstate_required_size(vcpu->arch.xcr0, true);

	/*
	 * The existing code assumes virtual address is 48-bit or 57-bit in the
	 * canonical address checks; exit if it is ever changed.
	 */
	best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0);
	if (best) {
		int vaddr_bits = (best->eax & 0xff00) >> 8;

		if (vaddr_bits != 48 && vaddr_bits != 57 && vaddr_bits != 0)
			return -EINVAL;
	}

	best = kvm_find_cpuid_entry(vcpu, KVM_CPUID_FEATURES, 0);
	if (kvm_hlt_in_guest(vcpu->kvm) && best &&
		(best->eax & (1 << KVM_FEATURE_PV_UNHALT)))
		best->eax &= ~(1 << KVM_FEATURE_PV_UNHALT);

	/* Update physical-address width */
	vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu);
	kvm_mmu_reset_context(vcpu);

	kvm_pmu_refresh(vcpu);
	return 0;
}