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Douglas Anderson 1d816ba168 arm64: Move MediaTek GIC quirk handling from irqchip to core In commit `44bd78dd2b` ("irqchip/gic-v3: Disable pseudo NMIs on MediaTek devices w/ firmware issues") we added a method for detecting MediaTek devices with broken firmware and disabled pseudo-NMI. While that worked, it didn't address the problem at a deep enough level. The fundamental issue with this broken firmware is that it's not saving and restoring several important GICR registers. The current list is believed to be: * GICR_NUM_IPRIORITYR * GICR_CTLR * GICR_ISPENDR0 * GICR_ISACTIVER0 * GICR_NSACR Pseudo-NMI didn't work because it was the only thing (currently) in the kernel that relied on the broken registers, so forcing pseudo-NMI off was an effective fix. However, it could be observed that calling system_uses_irq_prio_masking() on these systems still returned "true". That caused confusion and led to the need for commit `a07a594152` ("arm64: smp: avoid NMI IPIs with broken MediaTek FW"). It's worried that the incorrect value returned by system_uses_irq_prio_masking() on these systems will continue to confuse future developers. Let's fix the issue a little more completely by disabling IRQ priorities at a deeper level in the kernel. Once we do this we can revert some of the other bits of code dealing with this quirk. This includes a partial revert of commit `44bd78dd2b` ("irqchip/gic-v3: Disable pseudo NMIs on MediaTek devices w/ firmware issues"). This isn't a full revert because it leaves some of the changes to the "quirks" structure around in case future code needs it. Suggested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20231107072651.v2.1.Ide945748593cffd8ff0feb9ae22b795935b944d6@changeid Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2023-11-08 15:37:29 +00:00
arch	arm64: Move MediaTek GIC quirk handling from irqchip to core	2023-11-08 15:37:29 +00:00
block	blk-mq: fix tags UAF when shrinking q->nr_hw_queues	2023-09-11 16:17:34 -06:00
certs	certs: Reference revocation list for all keyrings	2023-08-17 20:12:41 +00:00
crypto	crypto: sm2 - Fix crash caused by uninitialized context	2023-09-20 13:10:10 +08:00
Documentation	Documentation/arm64: Fix typos in elf_hwcaps	2023-11-07 11:00:28 +00:00
drivers	arm64: Move MediaTek GIC quirk handling from irqchip to core	2023-11-08 15:37:29 +00:00
fs	Tracing fixes for 6.6-rc2:	2023-09-24 13:55:34 -07:00
include	Merge branch 'for-next/cpus_have_const_cap' into for-next/core	2023-10-26 17:10:18 +01:00
init	workqueue: Changes for v6.6	2023-09-01 16:06:32 -07:00
io_uring	io_uring/net: fix iter retargeting for selected buf	2023-09-14 10:12:55 -06:00
ipc	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
kernel	Tracing fixes for 6.6-rc2:	2023-09-24 13:55:34 -07:00
lib	argv_split: fix kernel-doc warnings	2023-09-19 13:21:33 -07:00
LICENSES	LICENSES: Add the copyleft-next-0.3.1 license	2022-11-08 15:44:01 +01:00
mm	13 hotfixes, 10 of which pertain to post-6.5 issues. The other 3 are	2023-09-23 11:51:16 -07:00
net	Networking fixes for 6.6-rc2, including fixes from netfilter and bpf	2023-09-21 11:28:16 -07:00
rust	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
samples	VFIO updates for v6.6-rc1	2023-08-30 20:36:01 -07:00
scripts	13 hotfixes, 10 of which pertain to post-6.5 issues. The other 3 are	2023-09-23 11:51:16 -07:00
security	selinux: fix handling of empty opts in selinux_fs_context_submount()	2023-09-12 17:31:08 -04:00
sound	ASoC: Fixes for v6.6	2023-09-20 15:02:16 +02:00
tools	Merge branch 'for-next/feat_lse128' into for-next/core	2023-10-26 17:10:07 +01:00
usr	initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP	2023-06-06 17:54:49 +09:00
virt	ARM:	2023-09-07 13:52:20 -07:00
.clang-format	iommu: Add for_each_group_device()	2023-05-23 08:15:51 +02:00
.cocciconfig
.get_maintainer.ignore	get_maintainer: add Alan to .get_maintainer.ignore	2022-08-20 15:17:44 -07:00
.gitattributes	.gitattributes: set diff driver for Rust source code files	2023-05-31 17:48:25 +02:00
.gitignore	kbuild: rpm-pkg: rename binkernel.spec to kernel.spec	2023-07-25 00:59:33 +09:00
.mailmap	for-linus-2023083101	2023-09-01 12:31:44 -07:00
.rustfmt.toml	rust: add `.rustfmt.toml`	2022-09-28 09:02:20 +02:00
COPYING
CREDITS	USB: Remove Wireless USB and UWB documentation	2023-08-09 14:17:32 +02:00
Kbuild	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	gpio fixes for v6.6-rc3	2023-09-23 11:56:57 -07:00
Makefile	Linux 6.6-rc3	2023-09-24 14:31:13 -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.