diff options
| author |   Isaku Yamahata <yamahata@valinux.co.jp> | 2009-03-04 21:05:39 +0900 |
|---|---|---|
| committer |   Tony Luck <tony.luck@intel.com> | 2009-03-26 10:50:32 -0700 |
| commit | 496203b15b7249599712525c2b6aafe231b4628d (patch) | |
| tree | ee8c5dbe02b820ac208fe6f3b7982a49a502cc28 /arch/ia64/include/asm/xen/minstate.h | |
| parent | ia64/pv_ops: paravirtualize mov = ar.itc. (diff) | |
| download | linux-dev-496203b15b7249599712525c2b6aafe231b4628d.tar.xz linux-dev-496203b15b7249599712525c2b6aafe231b4628d.zip | |
ia64/pv_ops/xen: paravirtualize read/write ar.itc and ar.itm
paravirtualize ar.itc and ar.itm in order to support save/restore.
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/xen/minstate.h')
| -rw-r--r-- | arch/ia64/include/asm/xen/minstate.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/ia64/include/asm/xen/minstate.h b/arch/ia64/include/asm/xen/minstate.h index 4d92d9bbda7b..c57fa910f2c9 100644 --- a/arch/ia64/include/asm/xen/minstate.h +++ b/arch/ia64/include/asm/xen/minstate.h @@ -1,3 +1,12 @@ + +#ifdef CONFIG_VIRT_CPU_ACCOUNTING +/* read ar.itc in advance, and use it before leaving bank 0 */ +#define XEN_ACCOUNT_GET_STAMP \ + MOV_FROM_ITC(pUStk, p6, r20, r2); +#else +#define XEN_ACCOUNT_GET_STAMP +#endif + /* * DO_SAVE_MIN switches to the kernel stacks (if necessary) and saves * the minimum state necessary that allows us to turn psr.ic back @@ -123,7 +132,7 @@ ;; \ .mem.offset 0,0; st8.spill [r16]=r2,16; \ .mem.offset 8,0; st8.spill [r17]=r3,16; \ - ACCOUNT_GET_STAMP \ + XEN_ACCOUNT_GET_STAMP \ adds r2=IA64_PT_REGS_R16_OFFSET,r1; \ ;; \ EXTRA; \ |