[kvm-unit-tests PATCH 1/2] s390x: smp: Use full PSW to bringup new cpu

Janosch Frank
2019-12-11T11:59:36Z

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>
---
lib/s390x/smp.c | 2 ++
s390x/cstart64.S | 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/s390x/smp.c b/lib/s390x/smp.c
index f57f420..e17751a 100644
--- a/lib/s390x/smp.c
+++ b/lib/s390x/smp.c
@@ -185,6 +185,8 @@ 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 86dd4c4..e6a6bdb 100644
--- a/s390x/cstart64.S
+++ b/s390x/cstart64.S
@@ -159,7 +159,7 @@ smp_cpu_setup_state:
xgr %r1, %r1
lmg %r0, %r15, GEN_LC_SW_INT_GRS
lctlg %c0, %c0, GEN_LC_SW_INT_CRS
- br %r14
+ lpswe GEN_LC_SW_INT_PSW

pgm_int:
SAVE_REGS
--
2.20.1