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[PULL,3/8] s390x/pci: use a reserved ID for the default PCI group

Message ID 20211216094447.58496-4-thuth@redhat.com
State New
Headers show
Series [PULL,1/8] s390: kvm: adjust diag318 resets to retain data | expand

Commit Message

Thomas Huth Dec. 16, 2021, 9:44 a.m. UTC 
From: Matthew Rosato <mjrosato@linux.ibm.com>

The current default PCI group being used can technically collide with a
real group ID passed from a hostdev.  Let's instead use a group ID that
comes from a special pool (0xF0-0xFF) that is architected to be reserved
for simulated devices.

Fixes: 28dc86a072 ("s390x/pci: use a PCI Group structure")
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20211203142706.427279-2-mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 include/hw/s390x/s390-pci-bus.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h
index aa891c178d..2727e7bdef 100644
--- a/include/hw/s390x/s390-pci-bus.h
+++ b/include/hw/s390x/s390-pci-bus.h
@@ -313,7 +313,7 @@  typedef struct ZpciFmb {
 } ZpciFmb;
 QEMU_BUILD_BUG_MSG(offsetof(ZpciFmb, fmt0) != 48, "padding in ZpciFmb");
 
-#define ZPCI_DEFAULT_FN_GRP 0x20
+#define ZPCI_DEFAULT_FN_GRP 0xFF
 typedef struct S390PCIGroup {
     ClpRspQueryPciGrp zpci_group;
     int id;