[PATCH v5 14/31] KVM: s390: Move s390 kvm code into a subdirectory

From: Steffen Eiden

Date: Fri Jul 31 2026 - 09:26:59 EST

Move all the code required to run s390 KVM guests on s390 to a s390
subdirectory. Move gmap related code into a gmap directory to later
share gmap code between KVM implementations.

Update S390 VFIO-PCI MAINTAINERS filepath.

No functional change.

Signed-off-by: Steffen Eiden <seiden@xxxxxxxxxxxxx>
---
MAINTAINERS | 2 +-
arch/s390/kvm/Kconfig | 37 +--------------------------
arch/s390/kvm/Makefile | 11 +-------
arch/s390/kvm/gmap/Makefile | 5 ++++
arch/s390/kvm/{ => gmap}/dat.c | 0
arch/s390/kvm/{ => gmap}/dat.h | 0
arch/s390/kvm/{ => gmap}/faultin.c | 0
arch/s390/kvm/{ => gmap}/faultin.h | 0
arch/s390/kvm/{ => gmap}/gmap.c | 0
arch/s390/kvm/{ => gmap}/gmap.h | 0
arch/s390/kvm/{ => gmap}/trace-gmap.h | 2 +-
arch/s390/kvm/{ => s390}/Kconfig | 18 -------------
arch/s390/kvm/{ => s390}/Makefile | 9 +++----
arch/s390/kvm/{ => s390}/diag.c | 0
arch/s390/kvm/{ => s390}/gaccess.c | 0
arch/s390/kvm/{ => s390}/gaccess.h | 0
arch/s390/kvm/{ => s390}/guestdbg.c | 0
arch/s390/kvm/{ => s390}/intercept.c | 0
arch/s390/kvm/{ => s390}/interrupt.c | 0
arch/s390/kvm/{ => s390}/pci.c | 0
arch/s390/kvm/{ => s390}/pci.h | 0
arch/s390/kvm/{ => s390}/priv.c | 0
arch/s390/kvm/{ => s390}/pv.c | 0
arch/s390/kvm/{ => s390}/s390.c | 0
arch/s390/kvm/{ => s390}/s390.h | 0
arch/s390/kvm/{ => s390}/sigp.c | 0
arch/s390/kvm/{ => s390}/trace-s390.h | 0
arch/s390/kvm/{ => s390}/trace.h | 0
arch/s390/kvm/{ => s390}/vsie.c | 0
29 files changed, 13 insertions(+), 71 deletions(-)
create mode 100644 arch/s390/kvm/gmap/Makefile
rename arch/s390/kvm/{ => gmap}/dat.c (100%)
rename arch/s390/kvm/{ => gmap}/dat.h (100%)
rename arch/s390/kvm/{ => gmap}/faultin.c (100%)
rename arch/s390/kvm/{ => gmap}/faultin.h (100%)
rename arch/s390/kvm/{ => gmap}/gmap.c (100%)
rename arch/s390/kvm/{ => gmap}/gmap.h (100%)
rename arch/s390/kvm/{ => gmap}/trace-gmap.h (96%)
copy arch/s390/kvm/{ => s390}/Kconfig (71%)
copy arch/s390/kvm/{ => s390}/Makefile (65%)
rename arch/s390/kvm/{ => s390}/diag.c (100%)
rename arch/s390/kvm/{ => s390}/gaccess.c (100%)
rename arch/s390/kvm/{ => s390}/gaccess.h (100%)
rename arch/s390/kvm/{ => s390}/guestdbg.c (100%)
rename arch/s390/kvm/{ => s390}/intercept.c (100%)
rename arch/s390/kvm/{ => s390}/interrupt.c (100%)
rename arch/s390/kvm/{ => s390}/pci.c (100%)
rename arch/s390/kvm/{ => s390}/pci.h (100%)
rename arch/s390/kvm/{ => s390}/priv.c (100%)
rename arch/s390/kvm/{ => s390}/pv.c (100%)
rename arch/s390/kvm/{ => s390}/s390.c (100%)
rename arch/s390/kvm/{ => s390}/s390.h (100%)
rename arch/s390/kvm/{ => s390}/sigp.c (100%)
rename arch/s390/kvm/{ => s390}/trace-s390.h (100%)
rename arch/s390/kvm/{ => s390}/trace.h (100%)
rename arch/s390/kvm/{ => s390}/vsie.c (100%)

diff --git a/MAINTAINERS b/MAINTAINERS
index 0d7987278c07..c7ef6c0163a9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -23918,7 +23918,7 @@ R: Eric Farman <farman@xxxxxxxxxxxxx>
L: linux-s390@xxxxxxxxxxxxxxx
L: kvm@xxxxxxxxxxxxxxx
S: Supported
-F: arch/s390/kvm/pci*
+F: arch/s390/kvm/s390/pci*
F: drivers/vfio/pci/vfio_pci_zdev.c
F: include/uapi/linux/vfio_zdev.h

diff --git a/arch/s390/kvm/Kconfig b/arch/s390/kvm/Kconfig
index e9d2ca797907..51646b067935 100644
--- a/arch/s390/kvm/Kconfig
+++ b/arch/s390/kvm/Kconfig
@@ -16,41 +16,6 @@ menuconfig VIRTUALIZATION

if VIRTUALIZATION

-config KVM
- def_tristate y
- prompt "Kernel-based Virtual Machine (KVM) support (s390)"
- select HAVE_KVM_CPU_RELAX_INTERCEPT
- select KVM_ASYNC_PF
- select KVM_ASYNC_PF_SYNC
- select KVM_COMMON
- select HAVE_KVM_IRQCHIP
- select HAVE_KVM_IRQ_ROUTING
- select HAVE_KVM_INVALID_WAKEUPS
- select HAVE_KVM_NO_POLL
- select KVM_VFIO
- select VIRT_XFER_TO_GUEST_WORK
- select KVM_MMU_LOCKLESS_AGING
- select KVM_GENERIC_PRE_FAULT_MEMORY
- help
- Support hosting paravirtualized s390 guest machines using the SIE
- virtualization capability on the mainframe. This should work
- on any 64bit machine.
-
- This module provides access to the hardware capabilities through
- a character device node named /dev/kvm.
-
- To compile this as a module, choose M here: the module
- will be called kvm.
-
- If unsure, say N.
-
-config KVM_S390_UCONTROL
- bool "Userspace controlled virtual machines"
- depends on KVM
- help
- Allow CAP_SYS_ADMIN users to create KVM virtual machines that are
- controlled by userspace.
-
- If unsure, say N.
+source "arch/s390/kvm/s390/Kconfig"

endif # VIRTUALIZATION
diff --git a/arch/s390/kvm/Makefile b/arch/s390/kvm/Makefile
index 961de97b8e80..a4e3875b5bdd 100644
--- a/arch/s390/kvm/Makefile
+++ b/arch/s390/kvm/Makefile
@@ -3,13 +3,4 @@
#
# Copyright IBM Corp. 2008

-include $(srctree)/virt/kvm/Makefile.kvm
-
-ccflags-y := -I$(src)
-
-kvm-y += s390.o intercept.o interrupt.o priv.o sigp.o
-kvm-y += diag.o gaccess.o guestdbg.o vsie.o pv.o
-kvm-y += dat.o gmap.o faultin.o
-
-kvm-$(CONFIG_VFIO_PCI_ZDEV_KVM) += pci.o
-obj-$(CONFIG_KVM) += kvm.o
+obj-$(CONFIG_KVM) += s390/
diff --git a/arch/s390/kvm/gmap/Makefile b/arch/s390/kvm/gmap/Makefile
new file mode 100644
index 000000000000..21967ed88877
--- /dev/null
+++ b/arch/s390/kvm/gmap/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+
+GMAP ?= ../gmap
+
+kvm-y += $(GMAP)/dat.o $(GMAP)/gmap.o $(GMAP)/faultin.o
diff --git a/arch/s390/kvm/dat.c b/arch/s390/kvm/gmap/dat.c
similarity index 100%
rename from arch/s390/kvm/dat.c
rename to arch/s390/kvm/gmap/dat.c
diff --git a/arch/s390/kvm/dat.h b/arch/s390/kvm/gmap/dat.h
similarity index 100%
rename from arch/s390/kvm/dat.h
rename to arch/s390/kvm/gmap/dat.h
diff --git a/arch/s390/kvm/faultin.c b/arch/s390/kvm/gmap/faultin.c
similarity index 100%
rename from arch/s390/kvm/faultin.c
rename to arch/s390/kvm/gmap/faultin.c
diff --git a/arch/s390/kvm/faultin.h b/arch/s390/kvm/gmap/faultin.h
similarity index 100%
rename from arch/s390/kvm/faultin.h
rename to arch/s390/kvm/gmap/faultin.h
diff --git a/arch/s390/kvm/gmap.c b/arch/s390/kvm/gmap/gmap.c
similarity index 100%
rename from arch/s390/kvm/gmap.c
rename to arch/s390/kvm/gmap/gmap.c
diff --git a/arch/s390/kvm/gmap.h b/arch/s390/kvm/gmap/gmap.h
similarity index 100%
rename from arch/s390/kvm/gmap.h
rename to arch/s390/kvm/gmap/gmap.h
diff --git a/arch/s390/kvm/trace-gmap.h b/arch/s390/kvm/gmap/trace-gmap.h
similarity index 96%
rename from arch/s390/kvm/trace-gmap.h
rename to arch/s390/kvm/gmap/trace-gmap.h
index c139b4ef75f6..78559298932c 100644
--- a/arch/s390/kvm/trace-gmap.h
+++ b/arch/s390/kvm/gmap/trace-gmap.h
@@ -6,7 +6,7 @@

#undef TRACE_SYSTEM
#define TRACE_SYSTEM kvm
-#define TRACE_INCLUDE_PATH .
+#define TRACE_INCLUDE_PATH ../gmap
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE trace-gmap

diff --git a/arch/s390/kvm/Kconfig b/arch/s390/kvm/s390/Kconfig
similarity index 71%
copy from arch/s390/kvm/Kconfig
copy to arch/s390/kvm/s390/Kconfig
index e9d2ca797907..62d65de3878d 100644
--- a/arch/s390/kvm/Kconfig
+++ b/arch/s390/kvm/s390/Kconfig
@@ -1,20 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
-#
-# KVM configuration
-#
-source "virt/kvm/Kconfig"
-
-menuconfig VIRTUALIZATION
- def_bool y
- prompt "KVM"
- help
- Say Y here to get to see options for using your Linux host to run other
- operating systems inside virtual machines (guests).
- This option alone does not add any kernel code.
-
- If you say N, all options in this submenu will be skipped and disabled.
-
-if VIRTUALIZATION

config KVM
def_tristate y
@@ -52,5 +36,3 @@ config KVM_S390_UCONTROL
controlled by userspace.

If unsure, say N.
-
-endif # VIRTUALIZATION
diff --git a/arch/s390/kvm/Makefile b/arch/s390/kvm/s390/Makefile
similarity index 65%
copy from arch/s390/kvm/Makefile
copy to arch/s390/kvm/s390/Makefile
index 961de97b8e80..de7deb81e655 100644
--- a/arch/s390/kvm/Makefile
+++ b/arch/s390/kvm/s390/Makefile
@@ -1,15 +1,14 @@
# SPDX-License-Identifier: GPL-2.0
-# Makefile for kernel virtual machines on s390
-#
-# Copyright IBM Corp. 2008

+KVM := ../../../../virt/kvm
include $(srctree)/virt/kvm/Makefile.kvm
+include $(srctree)/arch/s390/kvm/gmap/Makefile

-ccflags-y := -I$(src)
+ccflags-y := -I$(src) -I$(srctree)/arch/s390/kvm/gmap

kvm-y += s390.o intercept.o interrupt.o priv.o sigp.o
kvm-y += diag.o gaccess.o guestdbg.o vsie.o pv.o
-kvm-y += dat.o gmap.o faultin.o

kvm-$(CONFIG_VFIO_PCI_ZDEV_KVM) += pci.o
+
obj-$(CONFIG_KVM) += kvm.o
diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/s390/diag.c
similarity index 100%
rename from arch/s390/kvm/diag.c
rename to arch/s390/kvm/s390/diag.c
diff --git a/arch/s390/kvm/gaccess.c b/arch/s390/kvm/s390/gaccess.c
similarity index 100%
rename from arch/s390/kvm/gaccess.c
rename to arch/s390/kvm/s390/gaccess.c
diff --git a/arch/s390/kvm/gaccess.h b/arch/s390/kvm/s390/gaccess.h
similarity index 100%
rename from arch/s390/kvm/gaccess.h
rename to arch/s390/kvm/s390/gaccess.h
diff --git a/arch/s390/kvm/guestdbg.c b/arch/s390/kvm/s390/guestdbg.c
similarity index 100%
rename from arch/s390/kvm/guestdbg.c
rename to arch/s390/kvm/s390/guestdbg.c
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/s390/intercept.c
similarity index 100%
rename from arch/s390/kvm/intercept.c
rename to arch/s390/kvm/s390/intercept.c
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/s390/interrupt.c
similarity index 100%
rename from arch/s390/kvm/interrupt.c
rename to arch/s390/kvm/s390/interrupt.c
diff --git a/arch/s390/kvm/pci.c b/arch/s390/kvm/s390/pci.c
similarity index 100%
rename from arch/s390/kvm/pci.c
rename to arch/s390/kvm/s390/pci.c
diff --git a/arch/s390/kvm/pci.h b/arch/s390/kvm/s390/pci.h
similarity index 100%
rename from arch/s390/kvm/pci.h
rename to arch/s390/kvm/s390/pci.h
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/s390/priv.c
similarity index 100%
rename from arch/s390/kvm/priv.c
rename to arch/s390/kvm/s390/priv.c
diff --git a/arch/s390/kvm/pv.c b/arch/s390/kvm/s390/pv.c
similarity index 100%
rename from arch/s390/kvm/pv.c
rename to arch/s390/kvm/s390/pv.c
diff --git a/arch/s390/kvm/s390.c b/arch/s390/kvm/s390/s390.c
similarity index 100%
rename from arch/s390/kvm/s390.c
rename to arch/s390/kvm/s390/s390.c
diff --git a/arch/s390/kvm/s390.h b/arch/s390/kvm/s390/s390.h
similarity index 100%
rename from arch/s390/kvm/s390.h
rename to arch/s390/kvm/s390/s390.h
diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/s390/sigp.c
similarity index 100%
rename from arch/s390/kvm/sigp.c
rename to arch/s390/kvm/s390/sigp.c
diff --git a/arch/s390/kvm/trace-s390.h b/arch/s390/kvm/s390/trace-s390.h
similarity index 100%
rename from arch/s390/kvm/trace-s390.h
rename to arch/s390/kvm/s390/trace-s390.h
diff --git a/arch/s390/kvm/trace.h b/arch/s390/kvm/s390/trace.h
similarity index 100%
rename from arch/s390/kvm/trace.h
rename to arch/s390/kvm/s390/trace.h
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/s390/vsie.c
similarity index 100%
rename from arch/s390/kvm/vsie.c
rename to arch/s390/kvm/s390/vsie.c
--
2.53.0