x86_64: Fix paravirt compilation

[linux-2.6] / arch / i386 / kernel / paravirt.c

diff --git a/arch/i386/kernel/paravirt.c b/arch/i386/kernel/paravirt.c
index 5c10f376bce1e36b437c6a76ba28e5a6c4eb0026..ea962c0667d50edb07df04e43a3ab1884dd7df1d 100644 (file)
--- a/arch/i386/kernel/paravirt.c
+++ b/arch/i386/kernel/paravirt.c
@@ -19,7 +19,6 @@
 #include <linux/module.h>
 #include <linux/efi.h>
 #include <linux/bcd.h>
-#include <linux/start_kernel.h>
 #include <linux/highmem.h>
 
 #include <asm/bug.h>
@@ -125,20 +124,28 @@ unsigned paravirt_patch_ignore(unsigned len)
        return len;
 }
 
+struct branch {
+       unsigned char opcode;
+       u32 delta;
+} __attribute__((packed));
+
 unsigned paravirt_patch_call(void *target, u16 tgt_clobbers,
                             void *site, u16 site_clobbers,
                             unsigned len)
 {
        unsigned char *call = site;
        unsigned long delta = (unsigned long)target - (unsigned long)(call+5);
+       struct branch b;
 
        if (tgt_clobbers & ~site_clobbers)
                return len;     /* target would clobber too much for this site */
        if (len < 5)
                return len;     /* call too long for patch site */
 
-       *call++ = 0xe8;         /* call */
-       *(unsigned long *)call = delta;
+       b.opcode = 0xe8; /* call */
+       b.delta = delta;
+       BUILD_BUG_ON(sizeof(b) != 5);
+       text_poke(call, (unsigned char *)&b, 5);
 
        return 5;
 }
@@ -147,12 +154,14 @@ unsigned paravirt_patch_jmp(void *target, void *site, unsigned len)
 {
        unsigned char *jmp = site;
        unsigned long delta = (unsigned long)target - (unsigned long)(jmp+5);
+       struct branch b;
 
        if (len < 5)
                return len;     /* call too long for patch site */
 
-       *jmp++ = 0xe9;          /* jmp */
-       *(unsigned long *)jmp = delta;
+       b.opcode = 0xe9;        /* jmp */
+       b.delta = delta;
+       text_poke(jmp, (unsigned char *)&b, 5);
 
        return 5;
 }
@@ -229,6 +238,41 @@ static int __init print_banner(void)
 }
 core_initcall(print_banner);
 
+static struct resource reserve_ioports = {
+       .start = 0,
+       .end = IO_SPACE_LIMIT,
+       .name = "paravirt-ioport",
+       .flags = IORESOURCE_IO | IORESOURCE_BUSY,
+};
+
+static struct resource reserve_iomem = {
+       .start = 0,
+       .end = -1,
+       .name = "paravirt-iomem",
+       .flags = IORESOURCE_MEM | IORESOURCE_BUSY,
+};
+
+/*
+ * Reserve the whole legacy IO space to prevent any legacy drivers
+ * from wasting time probing for their hardware.  This is a fairly
+ * brute-force approach to disabling all non-virtual drivers.
+ *
+ * Note that this must be called very early to have any effect.
+ */
+int paravirt_disable_iospace(void)
+{
+       int ret;
+
+       ret = request_resource(&ioport_resource, &reserve_ioports);
+       if (ret == 0) {
+               ret = request_resource(&iomem_resource, &reserve_iomem);
+               if (ret)
+                       release_resource(&reserve_ioports);
+       }
+
+       return ret;
+}
+
 struct paravirt_ops paravirt_ops = {
        .name = "bare hardware",
        .paravirt_enabled = 0,
@@ -268,7 +312,7 @@ struct paravirt_ops paravirt_ops = {
        .write_msr = native_write_msr_safe,
        .read_tsc = native_read_tsc,
        .read_pmc = native_read_pmc,
-       .get_scheduled_cycles = native_read_tsc,
+       .sched_clock = native_sched_clock,
        .get_cpu_khz = native_calculate_cpu_khz,
        .load_tr_desc = native_load_tr_desc,
        .set_ldt = native_set_ldt,