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authorIsaku Yamahata <yamahata@valinux.co.jp>2009-03-04 15:05:45 +0300
committerTony Luck <tony.luck@intel.com>2009-03-26 21:01:46 +0300
commitc4312511ba1f3a08f2f64ca8335882ef56ff9bdd (patch)
tree28f7daee469542573399da64157b12b8a8345d02
parent53129c5c553f8d0c45f12f15742ac112e8605ab5 (diff)
downloadlinux-c4312511ba1f3a08f2f64ca8335882ef56ff9bdd.tar.xz
ia64/pv_ops: paravirtualize gate.S.
paravirtualize gate.S. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
-rw-r--r--arch/ia64/include/asm/native/inst.h5
-rw-r--r--arch/ia64/include/asm/native/pvchk_inst.h3
-rw-r--r--arch/ia64/kernel/gate.S17
3 files changed, 21 insertions, 4 deletions
diff --git a/arch/ia64/include/asm/native/inst.h b/arch/ia64/include/asm/native/inst.h
index ad59fc6a6134..d2d46efb3e6e 100644
--- a/arch/ia64/include/asm/native/inst.h
+++ b/arch/ia64/include/asm/native/inst.h
@@ -166,6 +166,11 @@
#define RSM_PSR_DT \
rsm psr.dt
+#define RSM_PSR_BE_I(clob0, clob1) \
+ rsm psr.be | psr.i \
+ CLOBBER(clob0) \
+ CLOBBER(clob1)
+
#define SSM_PSR_DT_AND_SRLZ_I \
ssm psr.dt \
;; \
diff --git a/arch/ia64/include/asm/native/pvchk_inst.h b/arch/ia64/include/asm/native/pvchk_inst.h
index 13b289ea6173..8d72962ec838 100644
--- a/arch/ia64/include/asm/native/pvchk_inst.h
+++ b/arch/ia64/include/asm/native/pvchk_inst.h
@@ -251,6 +251,9 @@
IS_RREG_CLOB(clob2)
#define RSM_PSR_DT \
nop 0
+#define RSM_PSR_BE_I(clob0, clob1) \
+ IS_RREG_CLOB(clob0) \
+ IS_RREG_CLOB(clob1)
#define SSM_PSR_DT_AND_SRLZ_I \
nop 0
#define BSW_0(clob0, clob1, clob2) \
diff --git a/arch/ia64/kernel/gate.S b/arch/ia64/kernel/gate.S
index c957228e3f1d..cf5e0a105e16 100644
--- a/arch/ia64/kernel/gate.S
+++ b/arch/ia64/kernel/gate.S
@@ -13,6 +13,7 @@
#include <asm/sigcontext.h>
#include <asm/system.h>
#include <asm/unistd.h>
+#include "paravirt_inst.h"
/*
* We can't easily refer to symbols inside the kernel. To avoid full runtime relocation,
@@ -323,7 +324,7 @@ GLOBAL_ENTRY(__kernel_syscall_via_epc)
epc // B causes split-issue
}
;;
- rsm psr.be | psr.i // M2 (5 cyc to srlz.d)
+ RSM_PSR_BE_I(r20, r22) // M2 (5 cyc to srlz.d)
LOAD_FSYSCALL_TABLE(r14) // X
;;
mov r16=IA64_KR(CURRENT) // M2 (12 cyc)
@@ -331,7 +332,7 @@ GLOBAL_ENTRY(__kernel_syscall_via_epc)
mov r19=NR_syscalls-1 // A
;;
lfetch [r18] // M0|1
- mov r29=psr // M2 (12 cyc)
+ MOV_FROM_PSR(p0, r29, r8) // M2 (12 cyc)
// If r17 is a NaT, p6 will be zero
cmp.geu p6,p7=r19,r17 // A (sysnr > 0 && sysnr < 1024+NR_syscalls)?
;;
@@ -347,7 +348,7 @@ GLOBAL_ENTRY(__kernel_syscall_via_epc)
(p6) tbit.z.unc p8,p0=r18,0 // I0 (dual-issues with "mov b7=r18"!)
nop.i 0
;;
-(p8) ssm psr.i
+ SSM_PSR_I(p8, p14, r25)
(p6) mov b7=r18 // I0
(p8) br.dptk.many b7 // B
@@ -368,9 +369,17 @@ GLOBAL_ENTRY(__kernel_syscall_via_epc)
#else
BRL_COND_FSYS_BUBBLE_DOWN(p6)
#endif
- ssm psr.i
+ SSM_PSR_I(p0, p14, r10)
mov r10=-1
(p10) mov r8=EINVAL
(p9) mov r8=ENOSYS
FSYS_RETURN
+
+#ifdef CONFIG_PARAVIRT
+ /*
+ * padd to make the size of this symbol constant
+ * independent of paravirtualization.
+ */
+ .align PAGE_SIZE / 8
+#endif
END(__kernel_syscall_via_epc)