[v11,10/16] s390x: protvirt: Set guest IPL PSW

Commit Message

Janosch Frank March 19, 2020, 1:19 p.m. UTC

Handling of CPU reset and setting of the IPL psw from guest storage at
offset 0 is done by a Ultravisor call. Let's only fetch it if
necessary.

Signed-off-by: Janosch Frank <[e-mail]>
Reviewed-by: Thomas Huth <[e-mail]>
Reviewed-by: David Hildenbrand <[e-mail]>
Reviewed-by: Christian Borntraeger <[e-mail]>
Reviewed-by: Claudio Imbrenda <[e-mail]>
Reviewed-by: Cornelia Huck <[e-mail]>
---
 target/s390x/cpu.c | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

Patch

diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
index 961e3ebdc530cfab..71a0c9b3e55d0cbf 100644
--- a/target/s390x/cpu.c
+++ b/target/s390x/cpu.c
@@ -77,16 +77,24 @@  static bool s390_cpu_has_work(CPUState *cs)
 static void s390_cpu_load_normal(CPUState *s)
 {
     S390CPU *cpu = S390_CPU(s);
-    uint64_t spsw = ldq_phys(s->as, 0);
-
-    cpu->env.psw.mask = spsw & PSW_MASK_SHORT_CTRL;
-    /*
-     * Invert short psw indication, so SIE will report a specification
-     * exception if it was not set.
-     */
-    cpu->env.psw.mask ^= PSW_MASK_SHORTPSW;
-    cpu->env.psw.addr = spsw & PSW_MASK_SHORT_ADDR;
+    uint64_t spsw;
 
+    if (!s390_is_pv()) {
+        spsw = ldq_phys(s->as, 0);
+        cpu->env.psw.mask = spsw & PSW_MASK_SHORT_CTRL;
+        /*
+         * Invert short psw indication, so SIE will report a specification
+         * exception if it was not set.
+         */
+        cpu->env.psw.mask ^= PSW_MASK_SHORTPSW;
+        cpu->env.psw.addr = spsw & PSW_MASK_SHORT_ADDR;
+    } else {
+        /*
+         * Firmware requires us to set the load state before we set
+         * the cpu to operating on protected guests.
+         */
+        s390_cpu_set_state(S390_CPU_STATE_LOAD, cpu);
+    }
     s390_cpu_set_state(S390_CPU_STATE_OPERATING, cpu);
 }
 #endif