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[IA64] pvops: paravirtualize minstate.h.

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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@ocs.com.au>
Cc: Akio Takebe <takebe_akio@jp.fujitsu.com>
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Isaku Yamahata
2008-05-19 22:13:37 +09:00
committed by Tony Luck
parent e92e8c68a6
commit 02e32e36f4
3 changed files with 38 additions and 6 deletions
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13
arch/ia64/kernel/minstate.h
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@@ -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 */
@@ -43,16 +44,16 @@
* 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,WORKAROUND) \
#define IA64_NATIVE_DO_SAVE_MIN(__COVER,SAVE_IFS,EXTRA,WORKAROUND) \
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; \
;; \
@@ -244,6 +245,6 @@
1: \
.pred.rel "mutex", pKStk, pUStk
#define SAVE_MIN_WITH_COVER DO_SAVE_MIN(cover, mov r30=cr.ifs, , RSE_WORKAROUND)
#define SAVE_MIN_WITH_COVER_R19 DO_SAVE_MIN(cover, mov r30=cr.ifs, mov r15=r19, RSE_WORKAROUND)
#define SAVE_MIN_WITH_COVER DO_SAVE_MIN(COVER, mov r30=cr.ifs, , RSE_WORKAROUND)
#define SAVE_MIN_WITH_COVER_R19 DO_SAVE_MIN(COVER, mov r30=cr.ifs, mov r15=r19, RSE_WORKAROUND)
#define SAVE_MIN DO_SAVE_MIN( , mov r30=r0, , )