Commit 5b409ed1 authored by Martin Schwidefsky's avatar Martin Schwidefsky
Browse files

[S390] cpu hotplug and accounting values 



Reset the cpu timer to the maximum value and correctly initialize the
cpu accounting values in the lowcore when the cpu is started.

Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent b86ccca4

arch/s390/kernel/asm-offsets.c

+2 −0
Original line number Diff line number Diff line
@@ -27,6 +27,8 @@ int main(void) 
	DEFINE(__TI_flags, offsetof(struct thread_info, flags));

	DEFINE(__TI_cpu, offsetof(struct thread_info, cpu));

	DEFINE(__TI_precount, offsetof(struct thread_info, preempt_count));

	DEFINE(__TI_user_timer, offsetof(struct thread_info, user_timer));

	DEFINE(__TI_system_timer, offsetof(struct thread_info, system_timer));

	BLANK();

	DEFINE(__PT_ARGS, offsetof(struct pt_regs, args));

	DEFINE(__PT_PSW, offsetof(struct pt_regs, psw));

arch/s390/kernel/entry.S

+13 −0
Original line number Diff line number Diff line
@@ -837,16 +837,29 @@ mcck_return: 
	__CPUINIT

	.globl restart_int_handler

restart_int_handler:

	basr	%r1,0

restart_base:

	spt	restart_vtime-restart_base(%r1)

	stck	__LC_LAST_UPDATE_CLOCK

	mvc	__LC_LAST_UPDATE_TIMER(8),restart_vtime-restart_base(%r1)

	mvc	__LC_EXIT_TIMER(8),restart_vtime-restart_base(%r1)

	l	%r15,__LC_SAVE_AREA+60	# load ksp

	lctl	%c0,%c15,__LC_CREGS_SAVE_AREA # get new ctl regs

	lam	%a0,%a15,__LC_AREGS_SAVE_AREA

	lm	%r6,%r15,__SF_GPRS(%r15) # load registers from clone

	l	%r1,__LC_THREAD_INFO

	mvc	__LC_USER_TIMER(8),__TI_user_timer(%r1)

	mvc	__LC_SYSTEM_TIMER(8),__TI_system_timer(%r1)

	xc	__LC_STEAL_TIMER(8),__LC_STEAL_TIMER

	stosm	__SF_EMPTY(%r15),0x04	# now we can turn dat on

	basr	%r14,0

	l	%r14,restart_addr-.(%r14)

	br	%r14			# branch to start_secondary

restart_addr:

	.long	start_secondary

	.align	8

restart_vtime:

	.long	0x7fffffff,0xffffffff

	.previous

#else

/*

arch/s390/kernel/entry64.S

+13 −0
Original line number Diff line number Diff line
@@ -831,14 +831,27 @@ mcck_return: 
	__CPUINIT

	.globl restart_int_handler

restart_int_handler:

	basr	%r1,0

restart_base:

	spt	restart_vtime-restart_base(%r1)

	stck	__LC_LAST_UPDATE_CLOCK

	mvc	__LC_LAST_UPDATE_TIMER(8),restart_vtime-restart_base(%r1)

	mvc	__LC_EXIT_TIMER(8),restart_vtime-restart_base(%r1)

	lg	%r15,__LC_SAVE_AREA+120 # load ksp

	lghi	%r10,__LC_CREGS_SAVE_AREA

	lctlg	%c0,%c15,0(%r10) # get new ctl regs

	lghi	%r10,__LC_AREGS_SAVE_AREA

	lam	%a0,%a15,0(%r10)

	lmg	%r6,%r15,__SF_GPRS(%r15) # load registers from clone

	lg	%r1,__LC_THREAD_INFO

	mvc	__LC_USER_TIMER(8),__TI_user_timer(%r1)

	mvc	__LC_SYSTEM_TIMER(8),__TI_system_timer(%r1)

	xc	__LC_STEAL_TIMER(8),__LC_STEAL_TIMER

	stosm	__SF_EMPTY(%r15),0x04	# now we can turn dat on

	jg	start_secondary

	.align	8

restart_vtime:

	.long	0x7fffffff,0xffffffff

	.previous

#else

/*