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ia64/pv_ops: paravirtualize gate.S.

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paravirtualize gate.S.

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 2009-03-04 21:05:45 +09:00 committed by Tony Luck
parent 53129c5c55
commit c4312511ba
3 changed files with 21 additions and 4 deletions
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5
arch/ia64/include/asm/native/inst.h
View file

@ -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 \
;; \

3
arch/ia64/include/asm/native/pvchk_inst.h
View file

@ -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) \

17
arch/ia64/kernel/gate.S
View file

@ -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)