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

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
......@@ -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)
{
......
......@@ -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);
......
......@@ -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))
......
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