x64, x2apic/intr-remap: Interrupt-remapping and x2apic support, fix

[linux-2.6-omap-h63xx.git] / arch / x86 / kernel / vsyscall_64.c

diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index 3f82427745802f0e30ff19ff5ed5aee7e50d7fa2..c87cbd84c3e521ca92a567c751bc852a74239122 100644 (file)
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -44,11 +44,6 @@
 
 #define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
 #define __syscall_clobber "r11","cx","memory"
-#define __pa_vsymbol(x)                        \
-       ({unsigned long v;              \
-       extern char __vsyscall_0;       \
-         asm("" : "=r" (v) : "0" (x)); \
-         ((v - VSYSCALL_START) + __pa_symbol(&__vsyscall_0)); })
 
 /*
  * vsyscall_gtod_data contains data that is :
@@ -102,7 +97,7 @@ static __always_inline void do_get_tz(struct timezone * tz)
 static __always_inline int gettimeofday(struct timeval *tv, struct timezone *tz)
 {
        int ret;
-       asm volatile("vsysc2: syscall"
+       asm volatile("syscall"
                : "=a" (ret)
                : "0" (__NR_gettimeofday),"D" (tv),"S" (tz)
                : __syscall_clobber );
@@ -112,7 +107,7 @@ static __always_inline int gettimeofday(struct timeval *tv, struct timezone *tz)
 static __always_inline long time_syscall(long *t)
 {
        long secs;
-       asm volatile("vsysc1: syscall"
+       asm volatile("syscall"
                : "=a" (secs)
                : "0" (__NR_time),"D" (t) : __syscall_clobber);
        return secs;
@@ -221,49 +216,18 @@ vgetcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
        return 0;
 }
 
-long __vsyscall(3) venosys_1(void)
+static long __vsyscall(3) venosys_1(void)
 {
        return -ENOSYS;
 }
 
 #ifdef CONFIG_SYSCTL
 
-#define SYSCALL 0x050f
-#define NOP2    0x9090
-
-/*
- * NOP out syscall in vsyscall page when not needed.
- */
-static int vsyscall_sysctl_change(ctl_table *ctl, int write, struct file * filp,
-                        void __user *buffer, size_t *lenp, loff_t *ppos)
+static int
+vsyscall_sysctl_change(ctl_table *ctl, int write, struct file * filp,
+                      void __user *buffer, size_t *lenp, loff_t *ppos)
 {
-       extern u16 vsysc1, vsysc2;
-       u16 __iomem *map1;
-       u16 __iomem *map2;
-       int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
-       if (!write)
-               return ret;
-       /* gcc has some trouble with __va(__pa()), so just do it this
-          way. */
-       map1 = ioremap(__pa_vsymbol(&vsysc1), 2);
-       if (!map1)
-               return -ENOMEM;
-       map2 = ioremap(__pa_vsymbol(&vsysc2), 2);
-       if (!map2) {
-               ret = -ENOMEM;
-               goto out;
-       }
-       if (!vsyscall_gtod_data.sysctl_enabled) {
-               writew(SYSCALL, map1);
-               writew(SYSCALL, map2);
-       } else {
-               writew(NOP2, map1);
-               writew(NOP2, map2);
-       }
-       iounmap(map2);
-out:
-       iounmap(map1);
-       return ret;
+       return proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
 }
 
 static ctl_table kernel_table2[] = {
@@ -279,14 +243,13 @@ static ctl_table kernel_root_table2[] = {
          .child = kernel_table2 },
        {}
 };
-
 #endif
 
 /* Assume __initcall executes before all user space. Hopefully kmod
    doesn't violate that. We'll find out if it does. */
 static void __cpuinit vsyscall_set_cpu(int cpu)
 {
-       unsigned long *d;
+       unsigned long d;
        unsigned long node = 0;
 #ifdef CONFIG_NUMA
        node = cpu_to_node(cpu);
@@ -297,11 +260,11 @@ static void __cpuinit vsyscall_set_cpu(int cpu)
        /* Store cpu number in limit so that it can be loaded quickly
           in user space in vgetcpu.
           12 bits for the CPU and 8 bits for the node. */
-       d = (unsigned long *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_PER_CPU);
-       *d = 0x0f40000000000ULL;
-       *d |= cpu;
-       *d |= (node & 0xf) << 12;
-       *d |= (node >> 4) << 48;
+       d = 0x0f40000000000ULL;
+       d |= cpu;
+       d |= (node & 0xf) << 12;
+       d |= (node >> 4) << 48;
+       write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_PER_CPU, &d, DESCTYPE_S);
 }
 
 static void __cpuinit cpu_vsyscall_init(void *arg)