kernel/linux.git/arch/s390/tools, branch v6.6.131

KVM: s390: Add facility 197 to the allow list

2022-07-13T13:25:25+00:00

z16 also provides facility 197 (The processor-activity-instrumentation extension 1). Let's add it to KVM. Signed-off-by: Christian Borntraeger Link: https://lore.kernel.org/r/20220711115108.6494-1-borntraeger@linux.ibm.com Acked-by: Thomas Huth Reviewed-by: Claudio Imbrenda

s390: raise minimum supported machine generation to z10

2022-03-10T14:58:17+00:00

Machine generations up to z9 (released in May 2006) have been officially out of service for several years now (z9 end of service - January 31, 2019). No distributions build kernels supporting those old machine generations anymore, except Debian, which seems to pick the oldest supported generation. The team supporting Debian on s390 has been notified about the change. Raising minimum supported machine generation to z10 helps to reduce maintenance cost and effectively remove code, which is not getting enough testing coverage due to lack of older hardware and distributions support. Besides that this unblocks some optimization opportunities and allows to use wider instruction set in asm files for future features implementation. Due to this change spectre mitigation and usercopy implementations could be drastically simplified and many newer instructions could be converted from ".insn" encoding to instruction names. Acked-by: Ilya Leoshkevich Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/nospec: add an option to use thunk-extern

2022-03-10T14:58:17+00:00

Currently with -mindirect-branch=thunk and -mfunction-return=thunk compiler options expoline thunks are put into individual COMDAT group sections. s390 is the only architecture which has group sections and it has implications for kpatch and objtool tools support. Using -mindirect-branch=thunk-extern and -mfunction-return=thunk-extern is an alternative, which comes with a need to generate all required expoline thunks manually. Unfortunately modules area is too far away from the kernel image, and expolines from the kernel image cannon be used. But since all new distributions (except Debian) build kernels for machine generations newer than z10, where "exrl" instruction is available, that leaves only 16 expolines thunks possible. Provide an option to build the kernel with -mindirect-branch=thunk-extern and -mfunction-return=thunk-extern for z10 or newer. This also requires to postlink expoline thunks into all modules explicitly. Currently modules already contain most expolines anyhow. Unfortunately -mindirect-branch=thunk-extern and -mfunction-return=thunk-extern options support is broken in gcc <= 11.2. Additional compile test is required to verify proper gcc support. Acked-by: Ilya Leoshkevich Co-developed-by: Sumanth Korikkar Signed-off-by: Sumanth Korikkar Signed-off-by: Vasily Gorbik

s390/disassembler: update opcode table

2021-12-16T18:58:07+00:00

Sync with binutils: update opcode table to reflect the instruction format update of the lpswey instruction, and add the qpaci instruction. Signed-off-by: Heiko Carstens

s390/disassembler: add instructions

2021-07-27T07:39:19+00:00

Add more instructions to the kernel disassembler. Signed-off-by: Heiko Carstens

KVM: s390: gen_facilities: allow facilities 165, 193, 194 and 196

2021-06-23T07:35:03+00:00

This enables the NNPA, BEAR enhancement,reset DAT protection and processor activity counter facilities via the cpu model. Reviewed-by: Claudio Imbrenda Reviewed-by: Janosch Frank Acked-by: Cornelia Huck Signed-off-by: Christian Borntraeger

s390/opcodes: rename selhhhr to selfhr

2021-02-23T23:31:22+00:00

Provide correct mnemonic for selfhr. Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

.gitignore: add SPDX License Identifier

2020-03-25T10:50:48+00:00

Add SPDX License Identifier to all .gitignore files. Signed-off-by: Masahiro Yamada Signed-off-by: Greg Kroah-Hartman

kbuild: rename hostprogs-y/always to hostprogs/always-y

2020-02-03T16:53:07+00:00

In old days, the "host-progs" syntax was used for specifying host programs. It was renamed to the current "hostprogs-y" in 2004. It is typically useful in scripts/Makefile because it allows Kbuild to selectively compile host programs based on the kernel configuration. This commit renames like follows: always -> always-y hostprogs-y -> hostprogs So, scripts/Makefile will look like this: always-$(CONFIG_BUILD_BIN2C) += ... always-$(CONFIG_KALLSYMS) += ... ... hostprogs := $(always-y) $(always-m) I think this makes more sense because a host program is always a host program, irrespective of the kernel configuration. We want to specify which ones to compile by CONFIG options, so always-y will be handier. The "always", "hostprogs-y", "hostprogs-m" will be kept for backward compatibility for a while. Signed-off-by: Masahiro Yamada

s390: add support for IBM z15 machines

2019-09-13T10:19:14+00:00

Add detection for machine types 0x8562 and 8x8561 and set the ELF platform name to z15. Add the miscellaneous-instruction-extension 3 facility to the list of facilities for z15. And allow to generate code that only runs on a z15 machine. Reviewed-by: Christian Borntraeger Signed-off-by: Martin Schwidefsky Signed-off-by: Heiko Carstens