Merge tag 's390-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Martin Schwidefsky:

 - Support for kernel address space layout randomization

 - Add support for kernel image signature verification

 - Convert s390 to the generic get_user_pages_fast code

 - Convert s390 to the stack unwind API analog to x86

 - Add support for CPU directed interrupts for PCI devices

 - Provide support for MIO instructions to the PCI base layer, this will
   allow the use of direct PCI mappings in user space code

 - Add the basic KVM guest ultravisor interface for protected VMs

 - Add AT_HWCAP bits for several new hardware capabilities

 - Update the CPU measurement facility counter definitions to SVN 6

 - Arnds cleanup patches for his quest to get LLVM compiles working

 - A vfio-ccw update with bug fixes and support for halt and clear

 - Improvements for the hardware TRNG code

 - Another round of cleanup for the QDIO layer

 - Numerous cleanups and bug fixes

* tag 's390-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (98 commits)
  s390/vdso: drop unnecessary cc-ldoption
  s390: fix clang -Wpointer-sign warnigns in boot code
  s390: drop CONFIG_VIRT_TO_BUS
  s390: boot, purgatory: pass $(CLANG_FLAGS) where needed
  s390: only build for new CPUs with clang
  s390: simplify disabled_wait
  s390/ftrace: use HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
  s390/unwind: introduce stack unwind API
  s390/opcodes: add missing instructions to the disassembler
  s390/bug: add entry size to the __bug_table section
  s390: use proper expoline sections for .dma code
  s390/nospec: rename assembler generated expoline thunks
  s390: add missing ENDPROC statements to assembler functions
  locking/lockdep: check for freed initmem in static_obj()
  s390/kernel: add support for kernel address space layout randomization (KASLR)
  s390/kernel: introduce .dma sections
  s390/sclp: do not use static sccbs
  s390/kprobes: use static buffer for insn_page
  s390/kernel: convert SYSCALL and PGM_CHECK handlers to .quad
  s390/kernel: build a relocatable kernel
  ...

1 files changed, 19 insertions, 6 deletions

diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c
index eeb7450db18c..3a36b07a5571 100644
--- a/arch/s390/pci/pci_clp.c
+++ b/arch/s390/pci/pci_clp.c
@@ -163,7 +163,14 @@ static int clp_store_query_pci_fn(struct zpci_dev *zdev,
 		memcpy(zdev->util_str, response->util_str,
 		       sizeof(zdev->util_str));
 	}
+	zdev->mio_capable = response->mio_addr_avail;
+	for (i = 0; i < PCI_BAR_COUNT; i++) {
+		if (!(response->mio_valid & (1 << (PCI_BAR_COUNT - i - 1))))
+			continue;
 
+		zdev->bars[i].mio_wb = (void __iomem *) response->addr[i].wb;
+		zdev->bars[i].mio_wt = (void __iomem *) response->addr[i].wt;
+	}
 	return 0;
 }
 
@@ -279,11 +286,18 @@ int clp_enable_fh(struct zpci_dev *zdev, u8 nr_dma_as)
 	int rc;
 
 	rc = clp_set_pci_fn(&fh, nr_dma_as, CLP_SET_ENABLE_PCI_FN);
-	if (!rc)
-		/* Success -> store enabled handle in zdev */
-		zdev->fh = fh;
+	zpci_dbg(3, "ena fid:%x, fh:%x, rc:%d\n", zdev->fid, fh, rc);
+	if (rc)
+		goto out;
 
-	zpci_dbg(3, "ena fid:%x, fh:%x, rc:%d\n", zdev->fid, zdev->fh, rc);
+	zdev->fh = fh;
+	if (zdev->mio_capable) {
+		rc = clp_set_pci_fn(&fh, nr_dma_as, CLP_SET_ENABLE_MIO);
+		zpci_dbg(3, "ena mio fid:%x, fh:%x, rc:%d\n", zdev->fid, fh, rc);
+		if (rc)
+			clp_disable_fh(zdev);
+	}
+out:
 	return rc;
 }
 
@@ -296,11 +310,10 @@ int clp_disable_fh(struct zpci_dev *zdev)
 		return 0;
 
 	rc = clp_set_pci_fn(&fh, 0, CLP_SET_DISABLE_PCI_FN);
+	zpci_dbg(3, "dis fid:%x, fh:%x, rc:%d\n", zdev->fid, fh, rc);
 	if (!rc)
-		/* Success -> store disabled handle in zdev */
 		zdev->fh = fh;
 
-	zpci_dbg(3, "dis fid:%x, fh:%x, rc:%d\n", zdev->fid, zdev->fh, rc);
 	return rc;
 }