* Zachary Amsden (zach@xxxxxxxxxx) wrote:
> I noticed that. I will integrate it into my patch and send you all
> updated diffs - but I didn't see the definition for get_cpu_gdt_table()
> - could you resend me your patch?
It's below. But it's a trivial one-line macro:
#define get_cpu_gdt_table(_cpu) blah
> I have to take an SMI, so I'll get to this early tomorrow.
Yeah, same here.
Subject: descriptor table subarch headers
Index: linux-2.6.12-xen0-arch/include/asm-i386/desc.h
===================================================================
--- linux-2.6.12-xen0-arch.orig/include/asm-i386/desc.h
+++ linux-2.6.12-xen0-arch/include/asm-i386/desc.h
@@ -14,9 +14,6 @@
#include <asm/mmu.h>
-extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
-DECLARE_PER_CPU(struct desc_struct, cpu_gdt_table[GDT_ENTRIES]);
-
DECLARE_PER_CPU(unsigned char, cpu_16bit_stack[CPU_16BIT_STACK_SIZE]);
struct Xgt_desc_struct {
@@ -48,19 +45,16 @@ __asm__ __volatile__ ("movw %w3,0(%2)\n\
"rorl $16,%%eax" \
: "=m"(*(n)) : "a" (addr), "r"(n), "ir"(limit), "i"(type))
+#include <mach_desc.h>
+
static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, void *addr)
{
- _set_tssldt_desc(&per_cpu(cpu_gdt_table, cpu)[entry], (int)addr,
+ _set_tssldt_desc(&get_cpu_gdt_table(cpu)[entry], (int)addr,
offsetof(struct tss_struct, __cacheline_filler) - 1, 0x89);
}
#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
-static inline void set_ldt_desc(unsigned int cpu, void *addr, unsigned int size)
-{
- _set_tssldt_desc(&per_cpu(cpu_gdt_table, cpu)[GDT_ENTRY_LDT], (int)addr, ((size << 3)-1), 0x82);
-}
-
#define LDT_entry_a(info) \
((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
@@ -90,39 +84,6 @@ static inline void set_ldt_desc(unsigned
# error update this code.
#endif
-static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
-{
-#define C(i) per_cpu(cpu_gdt_table, cpu)[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i]
- C(0); C(1); C(2);
-#undef C
-}
-
-static inline void clear_LDT(void)
-{
- int cpu = get_cpu();
-
- set_ldt_desc(cpu, &default_ldt[0], 5);
- load_LDT_desc();
- put_cpu();
-}
-
-/*
- * load one particular LDT into the current CPU
- */
-static inline void load_LDT_nolock(mm_context_t *pc, int cpu)
-{
- void *segments = pc->ldt;
- int count = pc->size;
-
- if (likely(!count)) {
- segments = &default_ldt[0];
- count = 5;
- }
-
- set_ldt_desc(cpu, segments, count);
- load_LDT_desc();
-}
-
static inline void load_LDT(mm_context_t *pc)
{
int cpu = get_cpu();
Index: linux-2.6.12-xen0-arch/include/asm-i386/mach-default/mach_desc.h
===================================================================
--- /dev/null
+++ linux-2.6.12-xen0-arch/include/asm-i386/mach-default/mach_desc.h
@@ -0,0 +1,46 @@
+#ifndef __ASM_MACH_DESC_H
+#define __ASM_MACH_DESC_H
+
+extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
+DECLARE_PER_CPU(struct desc_struct, cpu_gdt_table[GDT_ENTRIES]);
+#define get_cpu_gdt_table(_cpu) per_cpu(cpu_gdt_table, cpu)
+
+static inline void set_ldt_desc(unsigned int cpu, void *addr, unsigned int size)
+{
+ _set_tssldt_desc(&get_cpu_gdt_table(cpu)[GDT_ENTRY_LDT], (int)addr, ((size << 3)-1), 0x82);
+}
+
+static inline void load_TLS(struct thread_struct *t, unsigned int cpu)
+{
+#define C(i) get_cpu_gdt_table(cpu)[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i]
+ C(0); C(1); C(2);
+#undef C
+}
+
+static inline void clear_LDT(void)
+{
+ int cpu = get_cpu();
+
+ set_ldt_desc(cpu, &default_ldt[0], 5);
+ load_LDT_desc();
+ put_cpu();
+}
+
+/*
+ * load one particular LDT into the current CPU
+ */
+static inline void load_LDT_nolock(mm_context_t *pc, int cpu)
+{
+ void *segments = pc->ldt;
+ int count = pc->size;
+
+ if (likely(!count)) {
+ segments = &default_ldt[0];
+ count = 5;
+ }
+
+ set_ldt_desc(cpu, segments, count);
+ load_LDT_desc();
+}
+
+#endif
