[Qemu-devel] [PULL 18/25] s390x/pci: enable uid-checking

[Cornelia Huck <cornelia.huck@de.ibm.com>]

From: Yi Min Zhao <zyimin@linux.vnet.ibm.com>

The uid-checking facility guarantees uniqueness of the uid within the
vm and exposes the real uid to the guest when listing pci devices.
Let's always enable it and present it to the guest in the response to
the list pci clp command.

Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
 hw/s390x/s390-pci-bus.h  | 1 +
 hw/s390x/s390-pci-inst.c | 7 +++----
 hw/s390x/s390-pci-inst.h | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/hw/s390x/s390-pci-bus.h b/hw/s390x/s390-pci-bus.h
index 658bda5..2d9150c 100644
--- a/hw/s390x/s390-pci-bus.h
+++ b/hw/s390x/s390-pci-bus.h
@@ -33,6 +33,7 @@
 #define ZPCI_MAX_FID 0xffffffff
 #define ZPCI_MAX_UID 0xffff
 #define UID_UNDEFINED 0
+#define UID_CHECKING_ENABLED 0x01
 
 #define S390_PCI_HOST_BRIDGE(obj) \
     OBJECT_CHECK(S390pciState, (obj), TYPE_S390_PCI_HOST_BRIDGE)
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index 744f435..c84d0eb 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -56,8 +56,7 @@ static int list_pci(ClpReqRspListPci *rrb, uint8_t *cc)
     }
 
     if ((ldl_p(&rrb->request.fmt) & ~CLP_MASK_FMT) != 0 ||
-        ldq_p(&rrb->request.reserved1) != 0 ||
-        ldq_p(&rrb->request.reserved2) != 0) {
+        ldq_p(&rrb->request.reserved1) != 0) {
         res_code = CLP_RC_RESNOT0;
         rc = -EINVAL;
         goto out;
@@ -91,9 +90,9 @@ static int list_pci(ClpReqRspListPci *rrb, uint8_t *cc)
 
     stl_p(&rrb->response.fmt, 0);
     stq_p(&rrb->response.reserved1, 0);
-    stq_p(&rrb->response.reserved2, 0);
     stl_p(&rrb->response.mdd, FH_MASK_SHM);
     stw_p(&rrb->response.max_fn, PCI_MAX_FUNCTIONS);
+    rrb->response.flags = UID_CHECKING_ENABLED;
     rrb->response.entry_size = sizeof(ClpFhListEntry);
     finish = 0;
     idx = resume_token;
@@ -260,7 +259,7 @@ int clp_service_call(S390CPU *cpu, uint8_t r2)
         stl_p(&resquery->fid, pbdev->fid);
         stw_p(&resquery->pchid, 0);
         stw_p(&resquery->ug, 1);
-        stl_p(&resquery->uid, pbdev->fid);
+        stl_p(&resquery->uid, pbdev->uid);
         stw_p(&resquery->hdr.rsp, CLP_RC_OK);
         break;
     }
diff --git a/hw/s390x/s390-pci-inst.h b/hw/s390x/s390-pci-inst.h
index c35f337..e1c2ee1 100644
--- a/hw/s390x/s390-pci-inst.h
+++ b/hw/s390x/s390-pci-inst.h
@@ -104,7 +104,7 @@ typedef struct ClpRspListPci {
     uint64_t resume_token;
     uint32_t mdd;
     uint16_t max_fn;
-    uint8_t reserved2;
+    uint8_t flags;
     uint8_t entry_size;
     ClpFhListEntry fh_list[CLP_FH_LIST_NR_ENTRIES];
 } QEMU_PACKED ClpRspListPci;
-- 
2.9.0