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[v3,07/10] s390x: smp: Use full PSW to bringup new cpu

Message ID 20200429143518.1360468-8-frankja@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series s390x: smp: Improve smp code part 2 | expand

Commit Message

Janosch Frank April 29, 2020, 2:35 p.m. UTC 
Up to now we ignored the psw mask and only used the psw address when
bringing up a new cpu. For DAT we need to also load the mask, so let's
do that.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
---
 lib/s390x/smp.c  | 2 ++
 s390x/cstart64.S | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/lib/s390x/smp.c b/lib/s390x/smp.c
index 3f86243..6ef0335 100644
--- a/lib/s390x/smp.c
+++ b/lib/s390x/smp.c
@@ -202,6 +202,8 @@  int smp_cpu_setup(uint16_t addr, struct psw psw)
 	cpu->stack = (uint64_t *)alloc_pages(2);
 
 	/* Start without DAT and any other mask bits. */
+	cpu->lowcore->sw_int_psw.mask = psw.mask;
+	cpu->lowcore->sw_int_psw.addr = psw.addr;
 	cpu->lowcore->sw_int_grs[14] = psw.addr;
 	cpu->lowcore->sw_int_grs[15] = (uint64_t)cpu->stack + (PAGE_SIZE * 4);
 	lc->restart_new_psw.mask = 0x0000000180000000UL;
diff --git a/s390x/cstart64.S b/s390x/cstart64.S
index ecffbe0..e084f13 100644
--- a/s390x/cstart64.S
+++ b/s390x/cstart64.S
@@ -161,7 +161,8 @@  smp_cpu_setup_state:
 	lctlg   %c0, %c0, GEN_LC_SW_INT_CRS
 	/* We should only go once through cpu setup and not for every restart */
 	stg	%r14, GEN_LC_RESTART_NEW_PSW + 8
-	brasl	%r14, %r14
+	larl	%r14, 0f
+	lpswe	GEN_LC_SW_INT_PSW
 	/* If the function returns, just loop here */
 0:	j	0