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author | Isaku Yamahata <yamahata@valinux.co.jp> | 2009-03-04 12:05:42 (GMT) |
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committer | Tony Luck <tony.luck@intel.com> | 2009-03-26 17:51:02 (GMT) |
commit | e4ff5b8f545811008123dd9556a51d814f562fcf (patch) | |
tree | 2c308a3b1cc002f0d345ed64dd94a395678543bb /arch/ia64/kernel/paravirt_patchlist.c | |
parent | 1aec1c558a797512e922581b21a178a05438bfc9 (diff) | |
download | linux-fsl-qoriq-e4ff5b8f545811008123dd9556a51d814f562fcf.tar.xz |
ia64/pv_ops: gate page paravirtualization.
paravirtualize gate page by allowing each pv_ops instances
to define its own gate page.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/paravirt_patchlist.c')
-rw-r--r-- | arch/ia64/kernel/paravirt_patchlist.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/arch/ia64/kernel/paravirt_patchlist.c b/arch/ia64/kernel/paravirt_patchlist.c new file mode 100644 index 0000000..b28082a --- /dev/null +++ b/arch/ia64/kernel/paravirt_patchlist.c @@ -0,0 +1,79 @@ +/****************************************************************************** + * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp> + * VA Linux Systems Japan K.K. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/bug.h> +#include <asm/paravirt.h> + +#define DECLARE(name) \ + extern unsigned long \ + __ia64_native_start_gate_##name##_patchlist[]; \ + extern unsigned long \ + __ia64_native_end_gate_##name##_patchlist[] + +DECLARE(fsyscall); +DECLARE(brl_fsys_bubble_down); +DECLARE(vtop); +DECLARE(mckinley_e9); + +extern unsigned long __start_gate_section[]; + +#define ASSIGN(name) \ + .start_##name##_patchlist = \ + (unsigned long)__ia64_native_start_gate_##name##_patchlist, \ + .end_##name##_patchlist = \ + (unsigned long)__ia64_native_end_gate_##name##_patchlist + +struct pv_patchdata pv_patchdata __initdata = { + ASSIGN(fsyscall), + ASSIGN(brl_fsys_bubble_down), + ASSIGN(vtop), + ASSIGN(mckinley_e9), + + .gate_section = (void*)__start_gate_section, +}; + + +unsigned long __init +paravirt_get_gate_patchlist(enum pv_gate_patchlist type) +{ + +#define CASE(NAME, name) \ + case PV_GATE_START_##NAME: \ + return pv_patchdata.start_##name##_patchlist; \ + case PV_GATE_END_##NAME: \ + return pv_patchdata.end_##name##_patchlist; \ + + switch (type) { + CASE(FSYSCALL, fsyscall); + CASE(BRL_FSYS_BUBBLE_DOWN, brl_fsys_bubble_down); + CASE(VTOP, vtop); + CASE(MCKINLEY_E9, mckinley_e9); + default: + BUG(); + break; + } + return 0; +} + +void * __init +paravirt_get_gate_section(void) +{ + return pv_patchdata.gate_section; +} |