linux_dsm_epyc7002

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Daniel Borkmann b0a0c2566f bpf, s390: fix jit branch offset related to ldimm64 While testing some other work that required JIT modifications, I run into test_bpf causing a hang when JIT enabled on s390. The problematic test case was the one from `ddc665a4bb` (bpf, arm64: fix jit branch offset related to ldimm64), and turns out that we do have a similar issue on s390 as well. In bpf_jit_prog() we update next instruction address after returning from bpf_jit_insn() with an insn_count. bpf_jit_insn() returns either -1 in case of error (e.g. unsupported insn), 1 or 2. The latter is only the case for ldimm64 due to spanning 2 insns, however, next address is only set to i + 1 not taking actual insn_count into account, thus fix is to use insn_count instead of 1. bpf_jit_enable in mode 2 provides also disasm on s390: Before fix: 000003ff800349b6: a7f40003 brc 15,3ff800349bc ; target 000003ff800349ba: 0000 unknown 000003ff800349bc: e3b0f0700024 stg %r11,112(%r15) 000003ff800349c2: e3e0f0880024 stg %r14,136(%r15) 000003ff800349c8: 0db0 basr %r11,%r0 000003ff800349ca: c0ef00000000 llilf %r14,0 000003ff800349d0: e320b0360004 lg %r2,54(%r11) 000003ff800349d6: e330b03e0004 lg %r3,62(%r11) 000003ff800349dc: ec23ffeda065 clgrj %r2,%r3,10,3ff800349b6 ; jmp 000003ff800349e2: e3e0b0460004 lg %r14,70(%r11) 000003ff800349e8: e3e0b04e0004 lg %r14,78(%r11) 000003ff800349ee: b904002e lgr %r2,%r14 000003ff800349f2: e3b0f0700004 lg %r11,112(%r15) 000003ff800349f8: e3e0f0880004 lg %r14,136(%r15) 000003ff800349fe: 07fe bcr 15,%r14 After fix: 000003ff80ef3db4: a7f40003 brc 15,3ff80ef3dba 000003ff80ef3db8: 0000 unknown 000003ff80ef3dba: e3b0f0700024 stg %r11,112(%r15) 000003ff80ef3dc0: e3e0f0880024 stg %r14,136(%r15) 000003ff80ef3dc6: 0db0 basr %r11,%r0 000003ff80ef3dc8: c0ef00000000 llilf %r14,0 000003ff80ef3dce: e320b0360004 lg %r2,54(%r11) 000003ff80ef3dd4: e330b03e0004 lg %r3,62(%r11) 000003ff80ef3dda: ec230006a065 clgrj %r2,%r3,10,3ff80ef3de6 ; jmp 000003ff80ef3de0: e3e0b0460004 lg %r14,70(%r11) 000003ff80ef3de6: e3e0b04e0004 lg %r14,78(%r11) ; target 000003ff80ef3dec: b904002e lgr %r2,%r14 000003ff80ef3df0: e3b0f0700004 lg %r11,112(%r15) 000003ff80ef3df6: e3e0f0880004 lg %r14,136(%r15) 000003ff80ef3dfc: 07fe bcr 15,%r14 test_bpf.ko suite runs fine after the fix. Fixes: `0546231057` ("s390/bpf: Add s390x eBPF JIT compiler backend") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Tested-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-08-04 11:18:01 -07:00
arch	bpf, s390: fix jit branch offset related to ldimm64	2017-08-04 11:18:01 -07:00
block	blk-mq: map queues to all present CPUs	2017-07-24 10:01:31 -06:00
certs	modsign: add markers to endif-statements in certs/Makefile	2017-07-14 11:01:37 +10:00
crypto	crypto: authencesn - Fix digest_null crash	2017-07-18 17:01:11 +08:00
Documentation	Merge branch 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata	2017-07-31 13:33:21 -07:00
drivers	mlxsw: spectrum_switchdev: Release multicast groups during fini	2017-08-04 11:15:07 -07:00
firmware	firmware/Makefile: force recompilation if makefile changes	2017-05-08 17:15:10 -07:00
fs	More NFS client bugfixes for 4.13	2017-07-28 14:44:56 -07:00
include	tcp: introduce tcp_rto_delta_us() helper for xmit timer fix	2017-08-03 15:38:30 -07:00
init	random: do not ignore early device randomness	2017-07-12 16:26:00 -07:00
ipc	ipc/util.h: update documentation for ipc_getref() and ipc_putref()	2017-07-12 16:26:02 -07:00
kernel	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-07-31 22:36:42 -07:00
lib	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-07-31 22:36:42 -07:00
mm	Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-07-15 12:00:42 -07:00
net	tcp: fix xmit timer to only be reset if data ACKed/SACKed	2017-08-03 15:38:31 -07:00
samples	samples/bpf: fix bpf tunnel cleanup	2017-07-31 22:02:47 -07:00
scripts	DeviceTree fixes for 4.13:	2017-07-28 17:21:41 -07:00
security	Now that IPC and other changes have landed, enable manual markings for	2017-07-19 08:55:18 -07:00
sound	sound fixes for 4.13-rc3	2017-07-27 10:44:28 -07:00
tools	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-07-31 22:36:42 -07:00
usr	ramfs: clarify help text that compression applies to ramfs as well as legacy ramdisk.	2017-07-06 16:24:30 -07:00
virt	KVM: make pid available for uevents without debugfs	2017-07-26 18:57:44 +02:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.get_maintainer.ignore	Add hch to .get_maintainer.ignore	2015-08-21 14:30:10 -07:00
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	kbuild: Add support to generate LLVM assembly files	2017-04-25 08:13:52 +09:00
.mailmap	power supply and reset changes for the v4.12 series (part 2)	2017-05-12 12:02:21 -07:00
COPYING
CREDITS	avr32: remove support for AVR32 architecture	2017-05-01 09:27:15 +02:00
Kbuild	kbuild: Consolidate header generation from ASM offset information	2017-04-13 05:43:37 +09:00
Kconfig	kbuild: migrate all arch to the kconfig mainmenu upgrade	2010-09-19 22:54:11 -04:00
MAINTAINERS	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-07-31 22:36:42 -07:00
Makefile	Linux 4.13-rc3	2017-07-30 12:40:36 -07:00
README	README: add a new README file, pointing to the Documentation/	2016-10-24 08:12:35 -02:00

README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.