x86: unify set_tss_desc

This patch unifies the set_tss_desc between i386 and x86_64,
which can now have a common implementation. After the old
functions are removed from desc_{32,64}.h, nothing important is
left, and the files can be removed.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 33 insertions, 6 deletions

diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index d75bc0634313..c31715cf2218 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -165,6 +165,39 @@ static inline void pack_ldt(ldt_desc *ldt, unsigned long addr,
 #endif
 }
 
+static inline void pack_tss(tss_desc *tss, unsigned long addr,
+                           unsigned size, unsigned entry)
+{
+#ifdef CONFIG_X86_64
+                set_tssldt_descriptor(tss,
+                             addr, entry, size);
+#else
+                pack_descriptor(tss, (unsigned long)addr,
+                                size,
+                                0x80 | entry, 0);
+#endif
+}
+
+static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr)
+{
+        struct desc_struct *d = get_cpu_gdt_table(cpu);
+        tss_desc tss;
+
+        /*
+         * sizeof(unsigned long) coming from an extra "long" at the end
+         * of the iobitmap. See tss_struct definition in processor.h
+         *
+         * -1? seg base+limit should be pointing to the address of the
+         * last valid byte
+         */
+        pack_tss(&tss, (unsigned long)addr,
+                IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1,
+                DESC_TSS);
+        write_gdt_entry(d, entry, &tss, DESC_TSS);
+}
+
+#define set_tss_desc(cpu, addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
         if (likely(entries == 0))
@@ -222,12 +255,6 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
                 gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
 }
 
-#ifdef CONFIG_X86_32
-# include "desc_32.h"
-#else
-# include "desc_64.h"
-#endif
-
 #define _LDT_empty(info) (\
         (info)->base_addr       == 0    && \
         (info)->limit           == 0    && \