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Alexandru Elisei 7733306bd5 KVM: arm64: Annotate hyp NMI-related functions as __always_inline 
The "inline" keyword is a hint for the compiler to inline a function.  The
functions system_uses_irq_prio_masking() and gic_write_pmr() are used by
the code running at EL2 on a non-VHE system, so mark them as
__always_inline to make sure they'll always be part of the .hyp.text
section.

This fixes the following splat when trying to run a VM:

[   47.625273] Kernel panic - not syncing: HYP panic:
[   47.625273] PS:a00003c9 PC:0000ca0b42049fc4 ESR:86000006
[   47.625273] FAR:0000ca0b42049fc4 HPFAR:0000000010001000 PAR:0000000000000000
[   47.625273] VCPU:0000000000000000
[   47.647261] CPU: 1 PID: 217 Comm: kvm-vcpu-0 Not tainted 5.8.0-rc1-ARCH+ #61
[   47.654508] Hardware name: Globalscale Marvell ESPRESSOBin Board (DT)
[   47.661139] Call trace:
[   47.663659]  dump_backtrace+0x0/0x1cc
[   47.667413]  show_stack+0x18/0x24
[   47.670822]  dump_stack+0xb8/0x108
[   47.674312]  panic+0x124/0x2f4
[   47.677446]  panic+0x0/0x2f4
[   47.680407] SMP: stopping secondary CPUs
[   47.684439] Kernel Offset: disabled
[   47.688018] CPU features: 0x240402,20002008
[   47.692318] Memory Limit: none
[   47.695465] ---[ end Kernel panic - not syncing: HYP panic:
[   47.695465] PS:a00003c9 PC:0000ca0b42049fc4 ESR:86000006
[   47.695465] FAR:0000ca0b42049fc4 HPFAR:0000000010001000 PAR:0000000000000000
[   47.695465] VCPU:0000000000000000 ]---

The instruction abort was caused by the code running at EL2 trying to fetch
an instruction which wasn't mapped in the EL2 translation tables. Using
objdump showed the two functions as separate symbols in the .text section.

Fixes: 85738e05dc ("arm64: kvm: Unmask PMR before entering guest")
Cc: stable@vger.kernel.org
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: James Morse <james.morse@arm.com>
Link: https://lore.kernel.org/r/20200618171254.1596055-1-alexandru.elisei@arm.com
History 2020-06-22 14:39:45 +01:00
arch KVM: arm64: Annotate hyp NMI-related functions as __always_inline 2020-06-22 14:39:45 +01:00
block Kbuild updates for v5.8 (2nd) 2020-06-13 13:29:16 -07:00
certs .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
crypto Merge branch 'rwonce/rework' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux 2020-06-10 14:46:54 -07:00
Documentation Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-06-13 16:27:13 -07:00
drivers Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-06-13 16:27:13 -07:00
fs for-5.8-part2-tag 2020-06-14 09:47:25 -07:00
include Add additional LSM hooks for SafeSetID 2020-06-14 11:39:31 -07:00
init Kbuild updates for v5.8 (2nd) 2020-06-13 13:29:16 -07:00
ipc mmap locking API: use coccinelle to convert mmap_sem rwsem call sites 2020-06-09 09:39:14 -07:00
kernel Add additional LSM hooks for SafeSetID 2020-06-14 11:39:31 -07:00
lib Kbuild updates for v5.8 (2nd) 2020-06-13 13:29:16 -07:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
mm Kbuild updates for v5.8 (2nd) 2020-06-13 13:29:16 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-06-13 16:27:13 -07:00
samples binderfs: add gitignore for generated sample program 2020-06-13 13:41:24 -07:00
scripts Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-06-13 16:27:13 -07:00
security Add additional LSM hooks for SafeSetID 2020-06-14 11:39:31 -07:00
sound Kbuild updates for v5.8 (2nd) 2020-06-13 13:29:16 -07:00
tools Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-06-13 16:27:13 -07:00
usr bpfilter: match bit size of bpfilter_umh to that of the kernel 2020-05-17 18:52:01 +09:00
virt MIPS: 2020-06-12 11:05:52 -07:00
.clang-format block: add bio_for_each_bvec_all() 2020-05-25 11:25:24 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore modpost: generate vmlinux.symvers and reuse it for the second modpost 2020-06-06 23:38:12 +09:00
.mailmap A fair amount of stuff this time around, dominated by yet another massive 2020-06-01 15:45:27 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS mailmap: change email for Ricardo Ribalda 2020-05-25 18:59:59 -06:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Merge branch 'i2c/for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2020-06-13 13:12:38 -07:00
Makefile Linux 5.8-rc1 2020-06-14 12:45:04 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

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

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

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.