From 536b6081c0739bebbb33583370f62116d0cb42da Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Fri, 29 May 2020 05:54:01 -0400
Subject: [PATCH 19/42] s390x: ipl: Consolidate iplb validity check into one
 function
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RH-Author: Thomas Huth <thuth@redhat.com>
Message-id: <20200529055420.16855-20-thuth@redhat.com>
Patchwork-id: 97038
O-Subject: [RHEL-8.3.0 qemu-kvm PATCH v2 19/38] s390x: ipl: Consolidate iplb validity check into one function
Bugzilla: 1828317
RH-Acked-by: Claudio Imbrenda <cimbrend@redhat.com>
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: David Hildenbrand <david@redhat.com>

From: Janosch Frank <frankja@linux.ibm.com>

It's nicer to just call one function than calling a function for each
possible iplb type.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200310090950.61172-1-frankja@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
(cherry picked from commit 94c21436e5a89143f8b9cb4d089d1a2f3f4fd377)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 hw/s390x/ipl.h      | 18 +++++++++---------
 target/s390x/diag.c |  2 +-
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/hw/s390x/ipl.h b/hw/s390x/ipl.h
index d4813105db..3e44abe1c6 100644
--- a/hw/s390x/ipl.h
+++ b/hw/s390x/ipl.h
@@ -173,16 +173,16 @@ static inline bool iplb_valid_len(IplParameterBlock *iplb)
     return be32_to_cpu(iplb->len) <= sizeof(IplParameterBlock);
 }
 
-static inline bool iplb_valid_ccw(IplParameterBlock *iplb)
+static inline bool iplb_valid(IplParameterBlock *iplb)
 {
-    return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_CCW_LEN &&
-           iplb->pbt == S390_IPL_TYPE_CCW;
-}
-
-static inline bool iplb_valid_fcp(IplParameterBlock *iplb)
-{
-    return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_FCP_LEN &&
-           iplb->pbt == S390_IPL_TYPE_FCP;
+    switch (iplb->pbt) {
+    case S390_IPL_TYPE_FCP:
+        return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_FCP_LEN;
+    case S390_IPL_TYPE_CCW:
+        return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_CCW_LEN;
+    default:
+        return false;
+    }
 }
 
 #endif
diff --git a/target/s390x/diag.c b/target/s390x/diag.c
index b5aec06d6b..54e5670b3f 100644
--- a/target/s390x/diag.c
+++ b/target/s390x/diag.c
@@ -117,7 +117,7 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra)
 
         cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len));
 
-        if (!iplb_valid_ccw(iplb) && !iplb_valid_fcp(iplb)) {
+        if (!iplb_valid(iplb)) {
             env->regs[r1 + 1] = DIAG_308_RC_INVALID;
             goto out;
         }
-- 
2.27.0

