wireguard-linux/arch/s390/kernel/setup.c, branch jd/unified-crypt-queue

Merge tag 's390-5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2020-04-04T16:45:50Z

Pull s390 updates from Vasily Gorbik: - Update maintainers. Niklas Schnelle takes over zpci and Vineeth Vijayan common io code. - Extend cpuinfo to include topology information. - Add new extended counters for IBM z15 and sampling buffer allocation rework in perf code. - Add control over zeroing out memory during system restart. - CCA protected key block version 2 support and other fixes/improvements in crypto code. - Convert to new fallthrough; annotations. - Replace zero-length arrays with flexible-arrays. - QDIO debugfs and other small improvements. - Drop 2-level paging support optimization for compat tasks. Varios mm cleanups. - Remove broken and unused hibernate / power management support. - Remove fake numa support which does not bring any benefits. - Exclude offline CPUs from CPU topology masks to be more consistent with other architectures. - Prevent last branching instruction address leaking to userspace. - Other small various fixes and improvements all over the code. * tag 's390-5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (57 commits) s390/mm: cleanup init_new_context() callback s390/mm: cleanup virtual memory constants usage s390/mm: remove page table downgrade support s390/qdio: set qdio_irq->cdev at allocation time s390/qdio: remove unused function declarations s390/ccwgroup: remove pm support s390/ap: remove power management code from ap bus and drivers s390/zcrypt: use kvmalloc instead of kmalloc for 256k alloc s390/mm: cleanup arch_get_unmapped_area() and friends s390/ism: remove pm support s390/cio: use fallthrough; s390/vfio: use fallthrough; s390/zcrypt: use fallthrough; s390: use fallthrough; s390/cpum_sf: Fix wrong page count in error message s390/diag: fix display of diagnose call statistics s390/ap: Remove ap device suspend and resume callbacks s390/pci: Improve handling of unset UID s390/pci: Fix zpci_alloc_domain() over allocation s390/qdio: pass ISC as parameter to chsc_sadc() ...

s390: prevent leaking kernel address in BEAR

2020-03-10T14:16:25Z

When userspace executes a syscall or gets interrupted, BEAR contains a kernel address when returning to userspace. This make it pretty easy to figure out where the kernel is mapped even with KASLR enabled. To fix this, add lpswe to lowcore and always execute it there, so userspace sees only the lowcore address of lpswe. For this we have to extend both critical_cleanup and the SWITCH_ASYNC macro to also check for lpswe addresses in lowcore. Fixes: b2d24b97b2a9 ("s390/kernel: add support for kernel address space layout randomization (KASLR)") Cc: # v5.2+ Reviewed-by: Gerald Schaefer Signed-off-by: Sven Schnelle Signed-off-by: Vasily Gorbik

s390/protvirt: add ultravisor initialization

2020-02-27T18:44:40Z

Before being able to host protected virtual machines, donate some of the memory to the ultravisor. Besides that the ultravisor might impose addressing limitations for memory used to back protected VM storage. Treat that limit as protected virtualization host's virtual memory limit. Signed-off-by: Vasily Gorbik Reviewed-by: Christian Borntraeger Reviewed-by: Cornelia Huck Reviewed-by: Thomas Huth Reviewed-by: David Hildenbrand [borntraeger@de.ibm.com: patch merging, splitting, fixing] Signed-off-by: Christian Borntraeger

s390/protvirt: introduce host side setup

2020-02-27T18:44:40Z

Add "prot_virt" command line option which controls if the kernel protected VMs support is enabled at early boot time. This has to be done early, because it needs large amounts of memory and will disable some features like STP time sync for the lpar. Extend ultravisor info definitions and expose it via uv_info struct filled in during startup. Signed-off-by: Vasily Gorbik Reviewed-by: Thomas Huth Acked-by: David Hildenbrand Reviewed-by: Cornelia Huck Acked-by: Christian Borntraeger [borntraeger@de.ibm.com: patch merging, splitting, fixing] Signed-off-by: Christian Borntraeger

s390/mm: remove fake numa support

2020-02-27T15:02:21Z

It turned out that fake numa support is rather useless on s390, since there are no scenarios where there is any performance or other benefit when used. However it does provide maintenance cost and breaks from time to time. Therefore remove it. CONFIG_NUMA is still supported with a very small backend and only one node. This way userspace applications which require NUMA interfaces continue to work. Note that NODES_SHIFT is set to 1 (= 2 nodes) instead of 0 (= 1 node), since there is quite a bit of kernel code which assumes that more than one node is possible if CONFIG_NUMA is enabled. Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/boot: add dfltcc= kernel command line parameter

2020-01-31T18:30:40Z

Add the new kernel command line parameter 'dfltcc=' to configure s390 zlib hardware support. Format: { on | off | def_only | inf_only | always } on: s390 zlib hardware support for compression on level 1 and decompression (default) off: No s390 zlib hardware support def_only: s390 zlib hardware support for deflate only (compression on level 1) inf_only: s390 zlib hardware support for inflate only (decompression) always: Same as 'on' but ignores the selected compression level always using hardware support (used for debugging) Link: http://lkml.kernel.org/r/20200103223334.20669-5-zaslonko@linux.ibm.com Signed-off-by: Mikhail Zaslonko Cc: Chris Mason Cc: Christian Borntraeger Cc: David Sterba Cc: Eduard Shishkin Cc: Heiko Carstens Cc: Ilya Leoshkevich Cc: Josef Bacik Cc: Richard Purdie Cc: Vasily Gorbik Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm/memblock: define memblock_physmem_add()

2020-01-31T18:30:38Z

On the s390 platform memblock.physmem array is being built by directly calling into memblock_add_range() which is a low level function not intended to be used outside of memblock. Hence lets conditionally add helper functions for physmem array when HAVE_MEMBLOCK_PHYS_MAP is enabled. Also use MAX_NUMNODES instead of 0 as node ID similar to memblock_add() and memblock_reserve(). Make memblock_add_range() a static function as it is no longer getting used outside of memblock. Link: http://lkml.kernel.org/r/1578283835-21969-1-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Reviewed-by: Mike Rapoport Acked-by: Heiko Carstens Cc: Vasily Gorbik Cc: Christian Borntraeger Cc: Martin Schwidefsky Cc: Collin Walling Cc: Gerald Schaefer Cc: Philipp Rudo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge tag 'tty-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2020-01-29T18:13:27Z

Pull tty/serial driver updates from Greg KH: "Here are the big set of tty and serial driver updates for 5.6-rc1 Included in here are: - dummy_con cleanups (touches lots of arch code) - sysrq logic cleanups (touches lots of serial drivers) - samsung driver fixes (wasn't really being built) - conmakeshash move to tty subdir out of scripts - lots of small tty/serial driver updates All of these have been in linux-next for a while with no reported issues" * tag 'tty-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (140 commits) tty: n_hdlc: Use flexible-array member and struct_size() helper tty: baudrate: SPARC supports few more baud rates tty: baudrate: Synchronise baud_table[] and baud_bits[] tty: serial: meson_uart: Add support for kernel debugger serial: imx: fix a race condition in receive path serial: 8250_bcm2835aux: Document struct bcm2835aux_data serial: 8250_bcm2835aux: Use generic remapping code serial: 8250_bcm2835aux: Allocate uart_8250_port on stack serial: 8250_bcm2835aux: Suppress register_port error on -EPROBE_DEFER serial: 8250_bcm2835aux: Suppress clk_get error on -EPROBE_DEFER serial: 8250_bcm2835aux: Fix line mismatch on driver unbind serial_core: Remove unused member in uart_port vt: Correct comment documenting do_take_over_console() vt: Delete comment referencing non-existent unbind_con_driver() arch/xtensa/setup: Drop dummy_con initialization arch/x86/setup: Drop dummy_con initialization arch/unicore32/setup: Drop dummy_con initialization arch/sparc/setup: Drop dummy_con initialization arch/sh/setup: Drop dummy_con initialization arch/s390/setup: Drop dummy_con initialization ...

arch/s390/setup: Drop dummy_con initialization

2020-01-14T14:29:18Z

con_init in tty/vt.c will now set conswitchp to dummy_con if it's unset. Drop it from arch setup code. Signed-off-by: Arvind Sankar Link: https://lore.kernel.org/r/20191218214506.49252-20-nivedita@alum.mit.edu Signed-off-by: Greg Kroah-Hartman

s390/setup: Fix secure ipl message

2020-01-09T15:59:18Z

The new machine loader on z15 always creates an IPL Report block and thus sets the IPL_PL_FLAG_IPLSR even when secure boot is disabled. This causes the wrong message being printed at boot. Fix this by checking for IPL_PL_FLAG_SIPL instead. Fixes: 9641b8cc733f ("s390/ipl: read IPL report at early boot") Signed-off-by: Philipp Rudo Signed-off-by: Vasily Gorbik