aboutsummaryrefslogtreecommitdiff
path: root/arch/ia64/kernel/minstate.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ia64/kernel/minstate.h')
-rw-r--r--arch/ia64/kernel/minstate.h148
1 files changed, 74 insertions, 74 deletions
diff --git a/arch/ia64/kernel/minstate.h b/arch/ia64/kernel/minstate.h
index f6d8a010d99..cc82a7d744c 100644
--- a/arch/ia64/kernel/minstate.h
+++ b/arch/ia64/kernel/minstate.h
@@ -1,75 +1,23 @@
-#include <linux/config.h>
#include <asm/cache.h>
#include "entry.h"
+#include "paravirt_inst.h"
-/*
- * For ivt.s we want to access the stack virtually so we don't have to disable translation
- * on interrupts.
- *
- * On entry:
- * r1: pointer to current task (ar.k6)
- */
-#define MINSTATE_START_SAVE_MIN_VIRT \
-(pUStk) mov ar.rsc=0; /* set enforced lazy mode, pl 0, little-endian, loadrs=0 */ \
- ;; \
-(pUStk) mov.m r24=ar.rnat; \
-(pUStk) addl r22=IA64_RBS_OFFSET,r1; /* compute base of RBS */ \
-(pKStk) mov r1=sp; /* get sp */ \
- ;; \
-(pUStk) lfetch.fault.excl.nt1 [r22]; \
-(pUStk) addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r1; /* compute base of memory stack */ \
-(pUStk) mov r23=ar.bspstore; /* save ar.bspstore */ \
- ;; \
-(pUStk) mov ar.bspstore=r22; /* switch to kernel RBS */ \
-(pKStk) addl r1=-IA64_PT_REGS_SIZE,r1; /* if in kernel mode, use sp (r12) */ \
- ;; \
-(pUStk) mov r18=ar.bsp; \
-(pUStk) mov ar.rsc=0x3; /* set eager mode, pl 0, little-endian, loadrs=0 */
-
-#define MINSTATE_END_SAVE_MIN_VIRT \
- bsw.1; /* switch back to bank 1 (must be last in insn group) */ \
- ;;
-
-/*
- * For mca_asm.S we want to access the stack physically since the state is saved before we
- * go virtual and don't want to destroy the iip or ipsr.
- */
-#define MINSTATE_START_SAVE_MIN_PHYS \
-(pKStk) mov r3=IA64_KR(PER_CPU_DATA);; \
-(pKStk) addl r3=THIS_CPU(ia64_mca_data),r3;; \
-(pKStk) ld8 r3 = [r3];; \
-(pKStk) addl r3=IA64_MCA_CPU_INIT_STACK_OFFSET,r3;; \
-(pKStk) addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r3; \
-(pUStk) mov ar.rsc=0; /* set enforced lazy mode, pl 0, little-endian, loadrs=0 */ \
-(pUStk) addl r22=IA64_RBS_OFFSET,r1; /* compute base of register backing store */ \
- ;; \
-(pUStk) mov r24=ar.rnat; \
-(pUStk) addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r1; /* compute base of memory stack */ \
-(pUStk) mov r23=ar.bspstore; /* save ar.bspstore */ \
-(pUStk) dep r22=-1,r22,61,3; /* compute kernel virtual addr of RBS */ \
- ;; \
-(pUStk) mov ar.bspstore=r22; /* switch to kernel RBS */ \
- ;; \
-(pUStk) mov r18=ar.bsp; \
-(pUStk) mov ar.rsc=0x3; /* set eager mode, pl 0, little-endian, loadrs=0 */ \
-
-#define MINSTATE_END_SAVE_MIN_PHYS \
- dep r12=-1,r12,61,3; /* make sp a kernel virtual address */ \
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
+/* read ar.itc in advance, and use it before leaving bank 0 */
+#define ACCOUNT_GET_STAMP \
+(pUStk) mov.m r20=ar.itc;
+#define ACCOUNT_SYS_ENTER \
+(pUStk) br.call.spnt rp=account_sys_enter \
;;
-
-#ifdef MINSTATE_VIRT
-# define MINSTATE_GET_CURRENT(reg) mov reg=IA64_KR(CURRENT)
-# define MINSTATE_START_SAVE_MIN MINSTATE_START_SAVE_MIN_VIRT
-# define MINSTATE_END_SAVE_MIN MINSTATE_END_SAVE_MIN_VIRT
+#else
+#define ACCOUNT_GET_STAMP
+#define ACCOUNT_SYS_ENTER
#endif
-#ifdef MINSTATE_PHYS
-# define MINSTATE_GET_CURRENT(reg) mov reg=IA64_KR(CURRENT);; tpa reg=reg
-# define MINSTATE_START_SAVE_MIN MINSTATE_START_SAVE_MIN_PHYS
-# define MINSTATE_END_SAVE_MIN MINSTATE_END_SAVE_MIN_PHYS
-#endif
+.section ".data..patch.rse", "a"
+.previous
/*
* DO_SAVE_MIN switches to the kernel stacks (if necessary) and saves
@@ -96,16 +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) \
- MINSTATE_GET_CURRENT(r16); /* M (or M;;I) */ \
+#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; \
;; \
@@ -118,7 +66,21 @@
SAVE_IFS; \
cmp.eq pKStk,pUStk=r0,r17; /* are we in kernel mode already? */ \
;; \
- MINSTATE_START_SAVE_MIN \
+(pUStk) mov ar.rsc=0; /* set enforced lazy mode, pl 0, little-endian, loadrs=0 */ \
+ ;; \
+(pUStk) mov.m r24=ar.rnat; \
+(pUStk) addl r22=IA64_RBS_OFFSET,r1; /* compute base of RBS */ \
+(pKStk) mov r1=sp; /* get sp */ \
+ ;; \
+(pUStk) lfetch.fault.excl.nt1 [r22]; \
+(pUStk) addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r1; /* compute base of memory stack */ \
+(pUStk) mov r23=ar.bspstore; /* save ar.bspstore */ \
+ ;; \
+(pUStk) mov ar.bspstore=r22; /* switch to kernel RBS */ \
+(pKStk) addl r1=-IA64_PT_REGS_SIZE,r1; /* if in kernel mode, use sp (r12) */ \
+ ;; \
+(pUStk) mov r18=ar.bsp; \
+(pUStk) mov ar.rsc=0x3; /* set eager mode, pl 0, little-endian, loadrs=0 */ \
adds r17=2*L1_CACHE_BYTES,r1; /* really: biggest cache-line size */ \
adds r16=PT(CR_IPSR),r1; \
;; \
@@ -129,6 +91,7 @@
tbit.nz p15,p0=r29,IA64_PSR_I_BIT; \
mov r29=b0 \
;; \
+ WORKAROUND; \
adds r16=PT(R8),r1; /* initialize first base pointer */ \
adds r17=PT(R9),r1; /* initialize second base pointer */ \
(pKStk) mov r18=r0; /* make sure r18 isn't NaT */ \
@@ -176,12 +139,15 @@
;; \
.mem.offset 0,0; st8.spill [r16]=r2,16; \
.mem.offset 8,0; st8.spill [r17]=r3,16; \
+ ACCOUNT_GET_STAMP \
adds r2=IA64_PT_REGS_R16_OFFSET,r1; \
;; \
EXTRA; \
movl r1=__gp; /* establish kernel global pointer */ \
;; \
- MINSTATE_END_SAVE_MIN
+ ACCOUNT_SYS_ENTER \
+ bsw.1; /* switch back to bank 1 (must be last in insn group) */ \
+ ;;
/*
* SAVE_REST saves the remainder of pt_regs (with psr.ic on).
@@ -245,6 +211,40 @@
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 DO_SAVE_MIN( , mov r30=r0, )
+#define RSE_WORKAROUND \
+(pUStk) extr.u r17=r18,3,6; \
+(pUStk) sub r16=r18,r22; \
+[1:](pKStk) br.cond.sptk.many 1f; \
+ .xdata4 ".data..patch.rse",1b-. \
+ ;; \
+ cmp.ge p6,p7 = 33,r17; \
+ ;; \
+(p6) mov r17=0x310; \
+(p7) mov r17=0x308; \
+ ;; \
+ cmp.leu p1,p0=r16,r17; \
+(p1) br.cond.sptk.many 1f; \
+ dep.z r17=r26,0,62; \
+ movl r16=2f; \
+ ;; \
+ mov ar.pfs=r17; \
+ dep r27=r0,r27,16,14; \
+ mov b0=r16; \
+ ;; \
+ br.ret.sptk b0; \
+ ;; \
+2: \
+ mov ar.rsc=r0 \
+ ;; \
+ flushrs; \
+ ;; \
+ mov ar.bspstore=r22 \
+ ;; \
+ mov r18=ar.bsp; \
+ ;; \
+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 DO_SAVE_MIN( , mov r30=r0, , )
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-08 10:53:24 +0000