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authorGlauber de Oliveira Costa <gcosta@redhat.com>2008-01-30 13:31:13 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:31:13 +0100
commit014b15be30c04622d130946ab7c0a9101b523a8a (patch)
tree9138df88eb59da0021a4ac10c8ce4c66f9a62e13 /arch/x86/kernel/vmi_32.c
parent18245d5b6e54ca76b60b687e43eb893f9e9dd611 (diff)
downloadlinux-linaro-android-014b15be30c04622d130946ab7c0a9101b523a8a.tar.gz
x86: change write_gdt_entry signature.
This patch changes the write_gdt_entry function signature. Instead of the old "a" and "b" parameters, it now receives a pointer to a desc_struct, and the size of the entry being handled. This is because x86_64 can have some 16-byte entries as well as 8-byte ones. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> CC: Zachary Amsden <zach@vmware.com> CC: Jeremy Fitzhardinge <Jeremy.Fitzhardinge.citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/vmi_32.c')
-rw-r--r--arch/x86/kernel/vmi_32.c21
1 files changed, 15 insertions, 6 deletions
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index a635b22de25..21edd0d6eae 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -63,6 +63,7 @@ static struct {
void (*_set_ldt)(u32 selector);
void (*set_tr)(u32 selector);
void (*write_idt_entry)(struct desc_struct *, int, u32, u32);
+ void (*write_gdt_entry)(struct desc_struct *, int, u32, u32);
void (*set_kernel_stack)(u32 selector, u32 sp0);
void (*allocate_page)(u32, u32, u32, u32, u32);
void (*release_page)(u32, u32);
@@ -187,7 +188,7 @@ static void vmi_cpuid(unsigned int *ax, unsigned int *bx,
static inline void vmi_maybe_load_tls(struct desc_struct *gdt, int nr, struct desc_struct *new)
{
if (gdt[nr].a != new->a || gdt[nr].b != new->b)
- write_gdt_entry(gdt, nr, new->a, new->b);
+ write_gdt_entry(gdt, nr, new, 0);
}
static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
@@ -201,12 +202,12 @@ static void vmi_load_tls(struct thread_struct *t, unsigned int cpu)
static void vmi_set_ldt(const void *addr, unsigned entries)
{
unsigned cpu = smp_processor_id();
- u32 low, high;
+ struct desc_struct desc;
- pack_descriptor(&low, &high, (unsigned long)addr,
+ pack_descriptor(&desc, (unsigned long)addr,
entries * sizeof(struct desc_struct) - 1,
- DESCTYPE_LDT, 0);
- write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, low, high);
+ DESC_LDT, 0);
+ write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, &desc, DESC_LDT);
vmi_ops._set_ldt(entries ? GDT_ENTRY_LDT*sizeof(struct desc_struct) : 0);
}
@@ -221,6 +222,13 @@ static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[2]);
}
+static void vmi_write_gdt_entry(struct desc_struct *dt, int entry,
+ const void *desc, int type)
+{
+ u32 *gdt_entry = (u32 *)desc;
+ vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[2]);
+}
+
static void vmi_load_sp0(struct tss_struct *tss,
struct thread_struct *thread)
{
@@ -798,7 +806,8 @@ static inline int __init activate_vmi(void)
para_fill(pv_cpu_ops.store_tr, GetTR);
pv_cpu_ops.load_tls = vmi_load_tls;
para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
- para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
+ para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry,
+ write_gdt_entry, WriteGDTEntry);
para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry,
write_idt_entry, WriteIDTEntry);
para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);