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Oliver Upton f90f9360c3 KVM: arm64: Rewrite IMPDEF PMU version as NI 
KVM allows userspace to write an IMPDEF PMU version to the corresponding
32bit and 64bit ID register fields for the sake of backwards
compatibility with kernels that lacked commit 3d0dba5764 ("KVM: arm64:
PMU: Move the ID_AA64DFR0_EL1.PMUver limit to VM creation"). Plumbing
that IMPDEF PMU version through to the gues is getting in the way of
progress, and really doesn't any sense in the first place.

Bite the bullet and reinterpret the IMPDEF PMU version as NI (0) for
userspace writes. Additionally, spill the dirty details into a comment.

Link: https://lore.kernel.org/r/20230609190054.1542113-5-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
2023-06-12 23:08:33 +00:00
arch KVM: arm64: Rewrite IMPDEF PMU version as NI 2023-06-12 23:08:33 +00:00
block block: Deny writable memory mapping if block is read-only 2023-05-19 20:17:10 -06:00
certs
crypto This push fixes the following problems: 2023-05-07 10:57:14 -07:00
Documentation ata fixes for 6.4-rc3 2023-05-21 11:46:23 -07:00
drivers fbdev fixes for kernel 6.4-rc3: 2023-05-21 11:13:23 -07:00
fs four ksmbd server fixes 2023-05-21 10:55:31 -07:00
include KVM: arm64: Rewrite IMPDEF PMU version as NI 2023-06-12 23:08:33 +00:00
init
io_uring for-6.4/io_uring-2023-05-07 2023-05-07 10:00:09 -07:00
ipc
kernel Probes fixes for 6.4-rc1: 2023-05-18 09:04:45 -07:00
lib Eight hotfixes. Four are cc:stable, the other four are for post-6.4 2023-05-18 17:06:04 -07:00
LICENSES
mm mm: fix zswap writeback race condition 2023-05-17 15:24:33 -07:00
net Networking fixes for 6.4-rc3, including fixes from can, xfrm, 2023-05-18 08:52:14 -07:00
rust
samples LoongArch changes for v6.4 2023-05-04 12:40:16 -07:00
scripts Locking changes in v6.4: 2023-05-05 12:56:55 -07:00
security
sound ALSA: hda: Add NVIDIA codec IDs a3 through a7 to patch table 2023-05-17 16:57:43 +02:00
tools perf tools fixes for v6.4: 2023-05-21 13:24:59 -07:00
usr
virt KVM: Fix vcpu_array[0] races 2023-05-19 13:56:26 -04:00
.clang-format cxl for v6.4 2023-04-30 11:51:51 -07:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap mailmap: add entries for Nikolay Aleksandrov 2023-05-17 09:35:05 +01:00
.rustfmt.toml
COPYING
CREDITS MAINTAINERS: sctp: move Neil to CREDITS 2023-05-12 08:51:32 +01:00
Kbuild
Kconfig
MAINTAINERS sound fixes for 6.4-rc3 2023-05-19 10:55:55 -07:00
Makefile Linux 6.4-rc3 2023-05-21 14:05:48 -07:00
README

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.