WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-ia64-devel

[Xen-ia64-devel] [PATCH 14/15] ia64/pv_ops: paravirtualize gate.S.

paravirtualize gate.S.

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
 arch/ia64/include/asm/native/inst.h       |    5 +++++
 arch/ia64/include/asm/native/pvchk_inst.h |    3 +++
 arch/ia64/kernel/gate.S                   |   17 +++++++++++++----
 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 ad59fc6..d2d46ef 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 13b289e..8d72962 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 c957228..cf5e0a1 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)
-- 
1.6.0.2


_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel

<Prev in Thread] Current Thread [Next in Thread>