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authorSteffen Eiden <seiden@linux.ibm.com>2022-05-16 13:33:35 +0200
committerJanosch Frank <frankja@linux.ibm.com>2022-05-20 16:38:35 +0200
commit4689752c79fa30e91b49b39a9fba93c4d1f3e20c (patch)
treee76b156702241c464684e2f0a5f0a07409b0318f /MAINTAINERS
parentLinux 5.18-rc2 (diff)
downloadlinux-4689752c79fa30e91b49b39a9fba93c4d1f3e20c.tar.xz
linux-4689752c79fa30e91b49b39a9fba93c4d1f3e20c.zip
drivers/s390/char: Add Ultravisor io device
This patch adds a new miscdevice to expose some Ultravisor functions to userspace. Userspace can send IOCTLs to the uvdevice that will then emit a corresponding Ultravisor Call and hands the result over to userspace. The uvdevice is available if the Ultravisor Call facility is present. Userspace can call the Retrieve Attestation Measurement Ultravisor Call using IOCTLs on the uvdevice. The uvdevice will do some sanity checks first. Then, copy the request data to kernel space, build the UVCB, perform the UV call, and copy the result back to userspace. Signed-off-by: Steffen Eiden <seiden@linux.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Link: https://lore.kernel.org/kvm/20220516113335.338212-1-seiden@linux.ibm.com/ Message-Id: <20220516113335.338212-1-seiden@linux.ibm.com> Signed-off-by: Janosch Frank <frankja@linux.ibm.com> (whitespace and tristate fixes, pick)
Diffstat (limited to 'MAINTAINERS')
-rw-r--r--MAINTAINERS2
1 files changed, 2 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index 61d9f114c37f..a74488b7bb7c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10779,9 +10779,11 @@ F: Documentation/virt/kvm/s390*
F: arch/s390/include/asm/gmap.h
F: arch/s390/include/asm/kvm*
F: arch/s390/include/uapi/asm/kvm*
+F: arch/s390/include/uapi/asm/uvdevice.h
F: arch/s390/kernel/uv.c
F: arch/s390/kvm/
F: arch/s390/mm/gmap.c
+F: drivers/s390/char/uvdevice.c
F: tools/testing/selftests/kvm/*/s390x/
F: tools/testing/selftests/kvm/s390x/