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Commit 2d49ec72 authored by Gleb Natapov's avatar Gleb Natapov Committed by Avi Kivity
Browse files

KVM: move segment_base() into vmx.c 



segment_base() is used only by vmx so move it there.

Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 254d4d48

arch/x86/include/asm/kvm_host.h

+0 −9
Original line number Diff line number Diff line
@@ -644,8 +644,6 @@ int emulator_write_emulated(unsigned long addr, 
			    unsigned int bytes,

			    struct kvm_vcpu *vcpu);



unsigned long segment_base(u16 selector);



void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);

void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,

		       const u8 *new, int bytes,
@@ -723,13 +721,6 @@ static inline void kvm_get_idt(struct desc_ptr *table) 
	asm("sidt %0" : "=m"(*table));

}



static inline unsigned long kvm_read_tr_base(void)

{

	u16 tr;

	asm("str %0" : "=g"(tr));

	return segment_base(tr);

}



#ifdef CONFIG_X86_64

static inline unsigned long read_msr(unsigned long msr)

{

arch/x86/kvm/vmx.c

+37 −0
Original line number Diff line number Diff line
@@ -634,6 +634,43 @@ static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset) 
	return true;

}



static unsigned long segment_base(u16 selector)

{

	struct desc_ptr gdt;

	struct desc_struct *d;

	unsigned long table_base;

	unsigned long v;



	if (!(selector & ~3))

		return 0;



	native_store_gdt(&gdt);

	table_base = gdt.address;



	if (selector & 4) {           /* from ldt */

		u16 ldt_selector = kvm_read_ldt();



		if (!(ldt_selector & ~3))

			return 0;



		table_base = segment_base(ldt_selector);

	}

	d = (struct desc_struct *)(table_base + (selector & ~7));

	v = get_desc_base(d);

#ifdef CONFIG_X86_64

       if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11))

               v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32;

#endif

	return v;

}



static inline unsigned long kvm_read_tr_base(void)

{

	u16 tr;

	asm("str %0" : "=g"(tr));

	return segment_base(tr);

}



static void vmx_save_host_state(struct kvm_vcpu *vcpu)

{

	struct vcpu_vmx *vmx = to_vmx(vcpu);

arch/x86/kvm/x86.c

+0 −30
Original line number Diff line number Diff line
@@ -223,36 +223,6 @@ static void drop_user_return_notifiers(void *ignore) 
		kvm_on_user_return(&smsr->urn);

}



unsigned long segment_base(u16 selector)

{

	struct desc_ptr gdt;

	struct desc_struct *d;

	unsigned long table_base;

	unsigned long v;



	if (!(selector & ~3))

		return 0;



	native_store_gdt(&gdt);

	table_base = gdt.address;



	if (selector & 4) {           /* from ldt */

		u16 ldt_selector = kvm_read_ldt();



		if (!(ldt_selector & ~3))

			return 0;

		table_base = segment_base(ldt_selector);

	}

	d = (struct desc_struct *)(table_base + (selector & ~7));

	v = get_desc_base(d);

#ifdef CONFIG_X86_64

	if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11))

		v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32;

#endif

	return v;

}

EXPORT_SYMBOL_GPL(segment_base);



u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)

{

	if (irqchip_in_kernel(vcpu->kvm))