diff options
author | Isaku Yamahata <yamahata@valinux.co.jp> | 2009-03-04 15:06:51 +0300 |
---|---|---|
committer | Tony Luck <tony.luck@intel.com> | 2009-03-26 21:02:31 +0300 |
commit | bf7ab02f620c1020c869fc71a2c855918b6a5375 (patch) | |
tree | 9b6ac860fc762869069d9605f5c52c0199e642e5 /arch/ia64/include/asm/paravirt_patch.h | |
parent | f8de2ec678fa09276cf7ad02838eb80e86c73097 (diff) | |
download | linux-bf7ab02f620c1020c869fc71a2c855918b6a5375.tar.xz |
ia64/pv_op/binarypatch: add helper functions to support binary patching for paravirt_ops.
add helper functions to support binary patching for paravirt_ops.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/include/asm/paravirt_patch.h')
-rw-r--r-- | arch/ia64/include/asm/paravirt_patch.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/paravirt_patch.h b/arch/ia64/include/asm/paravirt_patch.h new file mode 100644 index 000000000000..128ff5db6e67 --- /dev/null +++ b/arch/ia64/include/asm/paravirt_patch.h @@ -0,0 +1,143 @@ +/****************************************************************************** + * 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 + * + */ + +#ifndef __ASM_PARAVIRT_PATCH_H +#define __ASM_PARAVIRT_PATCH_H + +#ifdef __ASSEMBLY__ + + .section .paravirt_branches, "a" + .previous +#define PARAVIRT_PATCH_SITE_BR(type) \ + { \ + [1:] ; \ + br.cond.sptk.many 2f ; \ + nop.b 0 ; \ + nop.b 0;; ; \ + } ; \ + 2: \ + .xdata8 ".paravirt_branches", 1b, type + +#else + +#include <linux/stringify.h> +#include <asm/intrinsics.h> + +/* for binary patch */ +struct paravirt_patch_site_bundle { + void *sbundle; + void *ebundle; + unsigned long type; +}; + +/* label means the beginning of new bundle */ +#define paravirt_alt_bundle(instr, privop) \ + "\t998:\n" \ + "\t" instr "\n" \ + "\t999:\n" \ + "\t.pushsection .paravirt_bundles, \"a\"\n" \ + "\t.popsection\n" \ + "\t.xdata8 \".paravirt_bundles\", 998b, 999b, " \ + __stringify(privop) "\n" + + +struct paravirt_patch_bundle_elem { + const void *sbundle; + const void *ebundle; + unsigned long type; +}; + + +struct paravirt_patch_site_inst { + unsigned long stag; + unsigned long etag; + unsigned long type; +}; + +#define paravirt_alt_inst(instr, privop) \ + "\t[998:]\n" \ + "\t" instr "\n" \ + "\t[999:]\n" \ + "\t.pushsection .paravirt_insts, \"a\"\n" \ + "\t.popsection\n" \ + "\t.xdata8 \".paravirt_insts\", 998b, 999b, " \ + __stringify(privop) "\n" + +struct paravirt_patch_site_branch { + unsigned long tag; + unsigned long type; +}; + +struct paravirt_patch_branch_target { + const void *entry; + unsigned long type; +}; + +void +__paravirt_patch_apply_branch( + unsigned long tag, unsigned long type, + const struct paravirt_patch_branch_target *entries, + unsigned int nr_entries); + +void +paravirt_patch_reloc_br(unsigned long tag, const void *target); + +void +paravirt_patch_reloc_brl(unsigned long tag, const void *target); + + +#if defined(ASM_SUPPORTED) && defined(CONFIG_PARAVIRT) +unsigned long +ia64_native_patch_bundle(void *sbundle, void *ebundle, unsigned long type); + +unsigned long +__paravirt_patch_apply_bundle(void *sbundle, void *ebundle, unsigned long type, + const struct paravirt_patch_bundle_elem *elems, + unsigned long nelems, + const struct paravirt_patch_bundle_elem **found); + +void +paravirt_patch_apply_bundle(const struct paravirt_patch_site_bundle *start, + const struct paravirt_patch_site_bundle *end); + +void +paravirt_patch_apply_inst(const struct paravirt_patch_site_inst *start, + const struct paravirt_patch_site_inst *end); + +void paravirt_patch_apply(void); +#else +#define paravirt_patch_apply_bundle(start, end) do { } while (0) +#define paravirt_patch_apply_inst(start, end) do { } while (0) +#define paravirt_patch_apply() do { } while (0) +#endif + +#endif /* !__ASSEMBLEY__ */ + +#endif /* __ASM_PARAVIRT_PATCH_H */ + +/* + * Local variables: + * mode: C + * c-set-style: "linux" + * c-basic-offset: 8 + * tab-width: 8 + * indent-tabs-mode: t + * End: + */ |