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ia64/pv_ops: add hooks to paravirtualize fsyscall implementation.

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Add two hooks, paravirt_get_fsyscall_table() and
paravirt_get_fsys_bubble_doen() to paravirtualize fsyscall implementation.
This patch just add the hooks fsyscall and don't paravirtualize it.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Isaku Yamahata
2009-03-04 21:05:34 +09:00
committed by Tony Luck
parent ac93925acb
commit dd97d5cb54
6 changed files with 54 additions and 14 deletions
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26
arch/ia64/kernel/patch.c
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@@ -7,6 +7,7 @@
#include <linux/init.h>
#include <linux/string.h>
#include <asm/paravirt.h>
#include <asm/patch.h>
#include <asm/processor.h>
#include <asm/sections.h>
@@ -169,16 +170,35 @@ ia64_patch_mckinley_e9 (unsigned long start, unsigned long end)
ia64_srlz_i();
}
extern unsigned long ia64_native_fsyscall_table[NR_syscalls];
extern char ia64_native_fsys_bubble_down[];
struct pv_fsys_data pv_fsys_data __initdata = {
.fsyscall_table = (unsigned long *)ia64_native_fsyscall_table,
.fsys_bubble_down = (void *)ia64_native_fsys_bubble_down,
};
unsigned long * __init
paravirt_get_fsyscall_table(void)
{
return pv_fsys_data.fsyscall_table;
}
char * __init
paravirt_get_fsys_bubble_down(void)
{
return pv_fsys_data.fsys_bubble_down;
}
static void __init
patch_fsyscall_table (unsigned long start, unsigned long end)
{
extern unsigned long fsyscall_table[NR_syscalls];
u64 fsyscall_table = (u64)paravirt_get_fsyscall_table();
s32 *offp = (s32 *) start;
u64 ip;
while (offp < (s32 *) end) {
ip = (u64) ia64_imva((char *) offp + *offp);
ia64_patch_imm64(ip, (u64) fsyscall_table);
ia64_patch_imm64(ip, fsyscall_table);
ia64_fc((void *) ip);
++offp;
}
@@ -189,7 +209,7 @@ patch_fsyscall_table (unsigned long start, unsigned long end)
static void __init
patch_brl_fsys_bubble_down (unsigned long start, unsigned long end)
{
extern char fsys_bubble_down[];
u64 fsys_bubble_down = (u64)paravirt_get_fsys_bubble_down();
s32 *offp = (s32 *) start;
u64 ip;