[Xen-ia64-devel] [PATCH 10/17] ia64/pv_ops: paravirtualize minstate.h.

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

paravirtualize minstate.h which are hand written assembly code.
They include sensitive or performance critical privileged
instructions. So that they are appropriate for paravirtualization.

Cc: Keith Owens <kaos@xxxxxxxxxx>
Cc: Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@xxxxxxxxx>
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
 arch/ia64/kernel/minstate.h      |   13 +++++++------
 arch/ia64/kernel/paravirt_inst.h |   29 +++++++++++++++++++++++++++++
 include/asm-ia64/native/inst.h   |    2 ++
 3 files changed, 38 insertions(+), 6 deletions(-)
 create mode 100644 arch/ia64/kernel/paravirt_inst.h

diff --git a/arch/ia64/kernel/minstate.h b/arch/ia64/kernel/minstate.h
index 7c548ac..9db53cf 100644
--- a/arch/ia64/kernel/minstate.h
+++ b/arch/ia64/kernel/minstate.h
@@ -2,6 +2,7 @@
 #include <asm/cache.h>
 
 #include "entry.h"
+#include "paravirt_inst.h"
 
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
 /* read ar.itc in advance, and use it before leaving bank 0 */
@@ -40,16 +41,16 @@
  * Note that psr.ic is NOT turned on by this macro.  This is so that
  * we can pass interruption state as arguments to a handler.
  */
-#define DO_SAVE_MIN(COVER,SAVE_IFS,EXTRA)                                      
                \
+#define IA64_NATIVE_DO_SAVE_MIN(__COVER,SAVE_IFS,EXTRA)                        
                        \
        mov r16=IA64_KR(CURRENT);       /* M */                                 
                \
        mov r27=ar.rsc;                 /* M */                                 
                \
        mov r20=r1;                     /* A */                                 
                \
        mov r25=ar.unat;                /* M */                                 
                \
-       mov r29=cr.ipsr;                /* M */                                 
                \
+       MOV_FROM_IPSR(p0,r29);          /* M */                                 
                \
        mov r26=ar.pfs;                 /* I */                                 
                \
-       mov r28=cr.iip;                 /* M */                                 
                \
+       MOV_FROM_IIP(r28);              /* M */                                 
                \
        mov r21=ar.fpsr;                /* M */                                 
                \
-       COVER;                          /* B;; (or nothing) */                  
                \
+       __COVER;                        /* B;; (or nothing) */                  
                \
        ;;                                                                      
                \
        adds r16=IA64_TASK_THREAD_ON_USTACK_OFFSET,r16;                         
                \
        ;;                                                                      
                \
@@ -206,6 +207,6 @@
        st8 [r25]=r10;          /* ar.ssd */    \
        ;;
 
-#define SAVE_MIN_WITH_COVER    DO_SAVE_MIN(cover, mov r30=cr.ifs,)
-#define SAVE_MIN_WITH_COVER_R19        DO_SAVE_MIN(cover, mov r30=cr.ifs, mov 
r15=r19)
+#define SAVE_MIN_WITH_COVER    DO_SAVE_MIN(COVER, mov r30=cr.ifs,)
+#define SAVE_MIN_WITH_COVER_R19        DO_SAVE_MIN(COVER, mov r30=cr.ifs, mov 
r15=r19)
 #define SAVE_MIN               DO_SAVE_MIN(     , mov r30=r0, )
diff --git a/arch/ia64/kernel/paravirt_inst.h b/arch/ia64/kernel/paravirt_inst.h
new file mode 100644
index 0000000..5cad6fb
--- /dev/null
+++ b/arch/ia64/kernel/paravirt_inst.h
@@ -0,0 +1,29 @@
+/******************************************************************************
+ * linux/arch/ia64/xen/paravirt_inst.h
+ *
+ * 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
+ *
+ */
+
+#ifdef __IA64_ASM_PARAVIRTUALIZED_XEN
+#include <asm/xen/inst.h>
+#include <asm/xen/minstate.h>
+#else
+#include <asm/native/inst.h>
+#endif
+
diff --git a/include/asm-ia64/native/inst.h b/include/asm-ia64/native/inst.h
index 2a50b70..f1072ac 100644
--- a/include/asm-ia64/native/inst.h
+++ b/include/asm-ia64/native/inst.h
@@ -20,6 +20,8 @@
  *
  */
 
+#define DO_SAVE_MIN            IA64_NATIVE_DO_SAVE_MIN
+
 #ifdef CONFIG_PARAVIRT_GUEST_ASM_CLOBBER_CHECK
 # define PARAVIRT_POISON       0xdeadbeefbaadf00d
 # define CLOBBER(clob)                         \
-- 
1.5.3


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