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Hui Li c864815933 LoongArch: Fix watchpoint setting error commit `f63a47b34b` upstream. In the current code, when debugging the following code using gdb, "invalid argument ..." message will be displayed. lihui@bogon:~$ cat test.c #include <stdio.h> int a = 0; int main() { a = 1; return 0; } lihui@bogon:~$ gcc -g test.c -o test lihui@bogon:~$ gdb test ... (gdb) watch a Hardware watchpoint 1: a (gdb) r ... Invalid argument setting hardware debug registers There are mainly two types of issues. 1. Some incorrect judgment condition existed in user_watch_state argument parsing, causing -EINVAL to be returned. When setting up a watchpoint, gdb uses the ptrace interface, ptrace(PTRACE_SETREGSET, tid, NT_LOONGARCH_HW_WATCH, (void *) &iov)). Register values in user_watch_state as follows: addr[0] = 0x0, mask[0] = 0x0, ctrl[0] = 0x0 addr[1] = 0x0, mask[1] = 0x0, ctrl[1] = 0x0 addr[2] = 0x0, mask[2] = 0x0, ctrl[2] = 0x0 addr[3] = 0x0, mask[3] = 0x0, ctrl[3] = 0x0 addr[4] = 0x0, mask[4] = 0x0, ctrl[4] = 0x0 addr[5] = 0x0, mask[5] = 0x0, ctrl[5] = 0x0 addr[6] = 0x0, mask[6] = 0x0, ctrl[6] = 0x0 addr[7] = 0x12000803c, mask[7] = 0x0, ctrl[7] = 0x610 In arch_bp_generic_fields(), return -EINVAL when ctrl.len is LOONGARCH_BREAKPOINT_LEN_8(0b00). So delete the incorrect judgment here. In ptrace_hbp_fill_attr_ctrl(), when note_type is NT_LOONGARCH_HW_WATCH and ctrl[0] == 0x0, if ((type & HW_BREAKPOINT_RW) != type) will return -EINVAL. Here ctrl.type should be set based on note_type, and unnecessary judgments can be removed. 2. The watchpoint argument was not set correctly due to unnecessary offset and alignment_mask. Modify ptrace_hbp_fill_attr_ctrl() and hw_breakpoint_arch_parse(), which ensure the watchpont argument is set correctly. All changes according to the LoongArch Reference Manual: https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#control-and-status-registers-related-to-watchpoints Cc: stable@vger.kernel.org Signed-off-by: Hui Li <lihui@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-06-27 13:52:27 +02:00
arch	LoongArch: Fix watchpoint setting error	2024-06-27 13:52:27 +02:00
block	block/ioctl: prefer different overflow check	2024-06-27 13:52:12 +02:00
certs	This update includes the following changes:	2023-11-02 16:15:30 -10:00
crypto	crypto: ecrdsa - Fix module auto-load on add_key	2024-06-16 13:51:03 +02:00
Documentation	dt-bindings: usb: realtek,rts5411: Add missing "additionalProperties" on child nodes	2024-06-21 14:40:39 +02:00
drivers	scsi: ufs: core: Free memory allocated for model before reinit	2024-06-27 13:52:27 +02:00
fs	cifs: fix typo in module parameter enable_gcm_256	2024-06-27 13:52:27 +02:00
include	ACPI: EC: Evaluate orphan _REG under EC device	2024-06-27 13:52:26 +02:00
init	printk: Fix LOG_CPU_MAX_BUF_SHIFT when BASE_SMALL is enabled	2024-06-12 11:39:35 +02:00
io_uring	io_uring/rsrc: fix incorrect assignment of iter->nr_segs in io_import_fixed	2024-06-27 13:52:25 +02:00
ipc	sysctl changes for v6.9-rc1	2024-03-18 14:59:13 -07:00
kernel	bpf: Fix reg_set_min_max corruption of fake_reg	2024-06-27 13:52:20 +02:00
lib	ubsan: Avoid i386 UBSAN handler crashes with Clang	2024-06-27 13:52:12 +02:00
LICENSES
mm	mm/huge_memory: don't unpoison huge_zero_folio	2024-06-21 14:40:38 +02:00
net	net: do not leave a dangling sk pointer, when socket creation fails	2024-06-27 13:52:27 +02:00
rust	rust: remove `params` from `module` macro example	2024-04-25 17:34:33 +02:00
samples	samples/landlock: Fix incorrect free in populate_ruleset_net	2024-05-30 09:45:01 +02:00
scripts	locking/atomic: scripts: fix ${atomic}_sub_and_test() kerneldoc	2024-06-21 14:40:31 +02:00
security	ima: Fix use-after-free on a dentry's dname.name	2024-06-21 14:40:38 +02:00
sound	ALSA: hda/realtek: Enable headset mic on IdeaPad 330-17IKB 81DM	2024-06-27 13:52:21 +02:00
tools	selftests: openvswitch: Use bash as interpreter	2024-06-27 13:52:22 +02:00
usr	Kbuild updates for v6.8	2024-01-18 17:57:07 -08:00
virt	KVM: Drop unused @may_block param from gfn_to_pfn_cache_invalidate_start()	2024-04-11 12:58:53 -07:00
.clang-format	clang-format: Update with v6.7-rc4's `for_each` macro list	2023-12-08 23:54:38 +01:00
.cocciconfig
.editorconfig	.editorconfig: remove trim_trailing_whitespace option	2024-06-21 14:40:11 +02:00
.get_maintainer.ignore	Add Jeff Kirsher to .get_maintainer.ignore	2024-03-08 11:36:54 +00:00
.gitattributes
.gitignore	kbuild: create a list of all built DTB files	2024-02-19 18:20:39 +09:00
.mailmap	18 hotfixes, 7 of which are cc:stable.	2024-05-10 14:16:03 -07:00
.rustfmt.toml
COPYING
CREDITS	MAINTAINERS: Drop Gustavo Pimentel as PCI DWC Maintainer	2024-03-27 13:41:02 -05:00
Kbuild
Kconfig
MAINTAINERS	cpufreq: amd-pstate: remove global header file	2024-06-21 14:40:00 +02:00
Makefile	Linux 6.9.6	2024-06-21 14:40:40 +02:00
README	README: Fix spelling	2024-03-18 03:36:32 -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 reStructuredText 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.