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s390/entry: remove mcck clock

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In the past machine checks where accounted as irq time. With the conversion
to generic entry, it was decided to account machine checks to the current
context. The stckf at the beginning of the machine check handler and the
lowcore member is no longer required, therefore remove it.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Sven Schnelle 2023-06-29 08:59:43 +02:00 committed by Alexander Gordeev
parent cada938a01
commit efccd4e0f3
3 changed files with 2 additions and 4 deletions
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4
arch/s390/include/asm/lowcore.h
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@ -118,8 +118,8 @@ struct lowcore {
__u64 avg_steal_timer; /* 0x0300 */
__u64 last_update_timer; /* 0x0308 */
__u64 last_update_clock; /* 0x0310 */
__u64 int_clock; /* 0x0318*/
__u64 mcck_clock; /* 0x0320 */
__u64 int_clock; /* 0x0318 */
__u8 pad_0x0320[0x0328-0x0320]; /* 0x0320 */
__u64 clock_comparator; /* 0x0328 */
__u64 boot_clock[2]; /* 0x0330 */

1
arch/s390/kernel/asm-offsets.c
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@ -122,7 +122,6 @@ int main(void)
OFFSET(__LC_LAST_UPDATE_TIMER, lowcore, last_update_timer);
OFFSET(__LC_LAST_UPDATE_CLOCK, lowcore, last_update_clock);
OFFSET(__LC_INT_CLOCK, lowcore, int_clock);
OFFSET(__LC_MCCK_CLOCK, lowcore, mcck_clock);
OFFSET(__LC_BOOT_CLOCK, lowcore, boot_clock);
OFFSET(__LC_CURRENT, lowcore, current_task);
OFFSET(__LC_KERNEL_STACK, lowcore, kernel_stack);

1
arch/s390/kernel/entry.S
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@ -488,7 +488,6 @@ SYM_FUNC_END(psw_idle)
* Machine check handler routines
*/
SYM_CODE_START(mcck_int_handler)
stckf __LC_MCCK_CLOCK
BPOFF
la %r1,4095 # validate r1
spt __LC_CPU_TIMER_SAVE_AREA-4095(%r1) # validate cpu timer