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Jason Wang
ceea1cd0ae virtio: switch to use vring_virtqueue for virtqueue_get variants
Those variants are used internally so let's switch to use
vring_virtqueue as parameter to be consistent with other internal
virtqueue helpers.

Acked-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20251230064649.55597-8-jasowang@redhat.com>
2025-12-31 05:39:17 -05:00
Jason Wang
4a0fa90b10 virtio_ring: switch to use vring_virtqueue for virtqueue_add variants
Those variants are used internally so let's switch to use
vring_virtqueue as parameter to be consistent with other internal
virtqueue helpers.

Acked-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20251230064649.55597-7-jasowang@redhat.com>
2025-12-31 05:39:17 -05:00
Jason Wang
8b8590b708 virtio_ring: switch to use vring_virtqueue for virtqueue_kick_prepare variants
Those variants are used internally so let's switch to use
vring_virtqueue as parameter to be consistent with other internal
virtqueue helpers.

Acked-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20251230064649.55597-6-jasowang@redhat.com>
2025-12-31 05:39:17 -05:00
Jason Wang
9552bc0581 virtio_ring: switch to use vring_virtqueue for virtqueue resize variants
Those variants are used internally so let's switch to use
vring_virtqueue as parameter to be consistent with other internal
virtqueue helpers.

Acked-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20251230064649.55597-5-jasowang@redhat.com>
2025-12-31 05:39:17 -05:00
Jason Wang
40da006f13 virtio_ring: unify logic of virtqueue_poll() and more_used()
This patch unifies the logic of virtqueue_poll() and more_used() for
better code reusing and ease the future in order implementation.

Acked-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20251230064649.55597-4-jasowang@redhat.com>
2025-12-31 05:39:17 -05:00
Jason Wang
79f6d68293 virtio_ring: switch to use vring_virtqueue in virtqueue_poll variants
Those variants are used internally so let's switch to use
vring_virtqueue as parameter to be consistent with other internal
virtqueue helpers.

Acked-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20251230064649.55597-3-jasowang@redhat.com>
2025-12-31 05:39:17 -05:00
Jason Wang
8ce8e3e558 virtio_ring: rename virtqueue_reinit_xxx to virtqueue_reset_xxx()
To be consistent with virtqueue_reset().

Acked-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20251230064649.55597-2-jasowang@redhat.com>
2025-12-31 05:39:17 -05:00
Lianfa Weng
8818ffb04b RDMA/hns: Introduce limit_bank mode with better performance
In limit_bank mode, QPs/CQs are restricted to using half of the banks.
HW concentrates resources on these banks, thereby improving performance
compared to the default mode.

Switch between limit_bank mode and default mode by setting the cap
flag in FW. Since the number of QPs and CQs will be halved, this mode
is suitable for scenarios where fewer QPs and CQs are required.

Signed-off-by: Lianfa Weng <wenglianfa@huawei.com>
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Link: https://patch.msgid.link/20251230154911.3397584-1-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
2025-12-31 05:33:34 -05:00
Krzysztof Niemiec
4fe2bd1954 drm/i915/gem: Zero-initialize the eb.vma array in i915_gem_do_execbuffer
Initialize the eb.vma array with values of 0 when the eb structure is
first set up. In particular, this sets the eb->vma[i].vma pointers to
NULL, simplifying cleanup and getting rid of the bug described below.

During the execution of eb_lookup_vmas(), the eb->vma array is
successively filled up with struct eb_vma objects. This process includes
calling eb_add_vma(), which might fail; however, even in the event of
failure, eb->vma[i].vma is set for the currently processed buffer.

If eb_add_vma() fails, eb_lookup_vmas() returns with an error, which
prompts a call to eb_release_vmas() to clean up the mess. Since
eb_lookup_vmas() might fail during processing any (possibly not first)
buffer, eb_release_vmas() checks whether a buffer's vma is NULL to know
at what point did the lookup function fail.

In eb_lookup_vmas(), eb->vma[i].vma is set to NULL if either the helper
function eb_lookup_vma() or eb_validate_vma() fails. eb->vma[i+1].vma is
set to NULL in case i915_gem_object_userptr_submit_init() fails; the
current one needs to be cleaned up by eb_release_vmas() at this point,
so the next one is set. If eb_add_vma() fails, neither the current nor
the next vma is set to NULL, which is a source of a NULL deref bug
described in the issue linked in the Closes tag.

When entering eb_lookup_vmas(), the vma pointers are set to the slab
poison value, instead of NULL. This doesn't matter for the actual
lookup, since it gets overwritten anyway, however the eb_release_vmas()
function only recognizes NULL as the stopping value, hence the pointers
are being set to NULL as they go in case of intermediate failure. This
patch changes the approach to filling them all with NULL at the start
instead, rather than handling that manually during failure.

Reported-by: Gangmin Kim <km.kim1503@gmail.com>
Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/15062
Fixes: 544460c338 ("drm/i915: Multi-BB execbuf")
Cc: stable@vger.kernel.org # 5.16.x
Signed-off-by: Krzysztof Niemiec <krzysztof.niemiec@intel.com>
Reviewed-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20251216180900.54294-2-krzysztof.niemiec@intel.com
(cherry picked from commit 08889b706d)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-12-31 11:19:47 +02:00
Dian-Syuan Yang
6a0b7392a6 wifi: rtw89: enhance connection stability when triggering beacon loss
If the driver supports ack status reports of TX frames, mac80211 allows it
to detect AP if it's alive and determine whether the client can maintain
the connection by sending null-data. Therefore, refine the flow to let
driver inform mac80211 to enable beacon loss work to track AP's status
upon receiving beacon loss event.

Signed-off-by: Dian-Syuan Yang <dian_syuan0116@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-13-pkshih@realtek.com
2025-12-31 16:27:04 +08:00
Zong-Zhe Yang
8c96752d99 wifi: rtw89: regd: 6 GHz power type marks default when inactive
When inactive, 6 GHz power type has been assigned to the default one,
but missed to mark the local control variable, dflt, true. Then, this
might let some 6 GHz power info of disconnected APs keep being taken
into account under certain cases.

So, mark default when inactive.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-12-pkshih@realtek.com
2025-12-31 16:26:55 +08:00
Chih-Kang Chang
9587ffbbd9 wifi: rtw89: 8922a: configure FW version for SCAN_OFFLOAD_EXTRA_OP feature
8922a supports SCAN_OFFLOAD_EXTRA_OP feature. Enable it, FW can do
back-op and TX NULL frames on the second connection.

Signed-off-by: Chih-Kang Chang <gary.chang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-11-pkshih@realtek.com
2025-12-31 16:26:40 +08:00
Chih-Kang Chang
fe17b1852f wifi: rtw89: refine TX nulldata judgement when scan with 2 OP channels
When scan with 2 OP channels, for the case like
not-connect(macid 0) + GO(macid 1) or not-connect(macid 0) + GC(macid 1),
the macid 0 doesn't offload NULL data packet to FW. Therefore, refine the
NULL data judgement to let interfaces that only connected and non-AP mode
need to TX nulldata.

Signed-off-by: Chih-Kang Chang <gary.chang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-10-pkshih@realtek.com
2025-12-31 16:25:22 +08:00
Ping-Ke Shih
8cb147e237 wifi: rtw89: add default quirks as features to chip_info
The coming chip will support thermal protection by default, so add default
quirks to chip_info.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-9-pkshih@realtek.com
2025-12-31 16:23:36 +08:00
Ping-Ke Shih
d57ec29478 wifi: rtw89: read chip ID for RTL8922D variants
The coming RTL8922D has many kinds of hardware variants. Read chips ID
ahead, so we can configure proper hardware settings accordingly.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-8-pkshih@realtek.com
2025-12-31 16:21:57 +08:00
Ping-Ke Shih
9e389ad5d1 wifi: rtw89: efuse: read hardware version from efuse for WiFi 7 chips
Hardware version from efuse prioritizes to the version from register.
For WiFi 7 chips, this becomes required, so implement this in common flow.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-7-pkshih@realtek.com
2025-12-31 16:20:38 +08:00
Kuan-Chung Chen
040af1ac80 wifi: rtw89: define TX/RX aggregation and MPDU capability per chip
Since TX/RX aggregation is different from chip to chip, define individual
number according to hardware ability. Also the coming chip RTL8922DE
can get expected performance.

Signed-off-by: Kuan-Chung Chen <damon.chen@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-6-pkshih@realtek.com
2025-12-31 16:18:55 +08:00
Chin-Yen Lee
cfa262efab wifi: rtw89: wow: abstract DMA check register for RTL8922DE
The coming RTL8922DE use different register and its bit to poll if DMA
becomes idle before entering WoWLAN. Abstract to share common flow.

Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-5-pkshih@realtek.com
2025-12-31 16:18:46 +08:00
Chin-Yen Lee
295c47806b wifi: rtw89: wow: add WOW_CAM update function for 8922D
For WOW_CAM update function, 8922DE use different H2C command from 8922AE.
Use chip to distinguish them.

Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-4-pkshih@realtek.com
2025-12-31 16:16:57 +08:00
Ping-Ke Shih
355f38849e wifi: rtw89: wow: change type of WoWLAN pattern mask to __le32
The WoWLAN pattern mask is generated in byte stream, and actually firmware
expects to see the same byte stream too. Since these byte stream is sent
to firmware with 32-bit stream in little-endian order. Change to mask
to __le32, and just do assignment instead of le32 conversion to wkfm fields
of H2C command.

For little-endian machine, it doesn't change logic at all.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-3-pkshih@realtek.com
2025-12-31 16:15:19 +08:00
Chin-Yen Lee
0b92c2cc48 wifi: rtw89: wow: use struct style to fill WOW CAM H2C command
The WOW CAM H2C command is used to tell firmware the content
of pattern match. Use struct instead of macros to fill the data.

Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251229030926.27004-2-pkshih@realtek.com
2025-12-31 16:14:07 +08:00
Ali Tariq
86c946bcc0 wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add
The driver does not set hw->sta_data_size, which causes mac80211 to
allocate insufficient space for driver private station data in
__sta_info_alloc(). When rtl8xxxu_sta_add() accesses members of
struct rtl8xxxu_sta_info through sta->drv_priv, this results in a
slab-out-of-bounds write.

KASAN report on RISC-V (VisionFive 2) with RTL8192EU adapter:

  BUG: KASAN: slab-out-of-bounds in rtl8xxxu_sta_add+0x31c/0x346
  Write of size 8 at addr ffffffd6d3e9ae88 by task kworker/u16:0/12

Set hw->sta_data_size to sizeof(struct rtl8xxxu_sta_info) during
probe, similar to how hw->vif_data_size is configured. This ensures
mac80211 allocates sufficient space for the driver's per-station
private data.

Tested on StarFive VisionFive 2 v1.2A board.

Fixes: eef55f1545 ("wifi: rtl8xxxu: support multiple interfaces in {add,remove}_interface()")
Cc: stable@vger.kernel.org
Signed-off-by: Ali Tariq <alitariq45892@gmail.com>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20251225115430.13011-1-alitariq45892@gmail.com
2025-12-31 16:00:21 +08:00
Chenghao Duan
bb85d206be samples/ftrace: Adjust LoongArch register restore order in direct calls
Ensure that in the ftrace direct call logic, the CPU register state
(with ra = parent return address) is restored to the correct state after
the execution of the custom trampoline function and before returning to
the traced function. Additionally, guarantee the correctness of the jump
logic for jr t0 (traced function address).

Cc: stable@vger.kernel.org
Fixes: 9cdc3b6a29 ("LoongArch: ftrace: Add direct call support")
Reported-by: Youling Tang <tangyouling@kylinos.cn>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Chenghao Duan <duanchenghao@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:25 +08:00
Chenghao Duan
73721d8676 LoongArch: BPF: Enhance the bpf_arch_text_poke() function
Enhance the bpf_arch_text_poke() function to enable accurate location
of BPF program entry points.

When modifying the entry point of a BPF program, skip the "move t0, ra"
instruction to ensure the correct logic and copy of the jump address.

Cc: stable@vger.kernel.org
Fixes: 677e6123e3 ("LoongArch: BPF: Disable trampoline for kernel module function trace")
Signed-off-by: Chenghao Duan <duanchenghao@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:21 +08:00
Chenghao Duan
26138762d9 LoongArch: BPF: Enable trampoline-based tracing for module functions
Remove the previous restrictions that blocked the tracing of kernel
module functions. Fix the issue that previously caused kernel lockups
when attempting to trace module functions.

Before entering the trampoline code, the return address register ra
shall store the address of the next assembly instruction after the
'bl trampoline' instruction, which is the traced function address, and
the register t0 shall store the parent function return address. Refine
the trampoline return logic to ensure that register data remains correct
when returning to both the traced function and the parent function.

Before this patch was applied, the module_attach test in selftests/bpf
encountered a deadlock issue. This was caused by an incorrect jump
address after the trampoline execution, which resulted in an infinite
loop within the module function.

Cc: stable@vger.kernel.org
Fixes: 677e6123e3 ("LoongArch: BPF: Disable trampoline for kernel module function trace")
Signed-off-by: Chenghao Duan <duanchenghao@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:21 +08:00
Chenghao Duan
61319d15a5 LoongArch: BPF: Adjust the jump offset of tail calls
Call the next bpf prog and skip the first instruction of TCC
initialization.

A total of 7 instructions are skipped:
'move t0, ra'			1 inst
'move_imm + jirl'		5 inst
'addid REG_TCC, zero, 0'	1 inst

Relevant test cases: the tailcalls test item in selftests/bpf.

Cc: stable@vger.kernel.org
Fixes: 677e6123e3 ("LoongArch: BPF: Disable trampoline for kernel module function trace")
Signed-off-by: Chenghao Duan <duanchenghao@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:21 +08:00
Chenghao Duan
d314e1f482 LoongArch: BPF: Save return address register ra to t0 before trampoline
Modify the build_prologue() function to ensure the return address
register ra is saved to t0 before entering trampoline operations.
This change ensures the accurate return address handling when a BPF
program calls another BPF program, preventing errors in the BPF-to-BPF
call chain.

Cc: stable@vger.kernel.org
Fixes: 677e6123e3 ("LoongArch: BPF: Disable trampoline for kernel module function trace")
Signed-off-by: Chenghao Duan <duanchenghao@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:20 +08:00
Hengqi Chen
eb71f5c433 LoongArch: BPF: Zero-extend bpf_tail_call() index
The bpf_tail_call() index should be treated as a u32 value. Let's
zero-extend it to avoid calling wrong BPF progs. See similar fixes
for x86 [1]) and arm64 ([2]) for more details.

  [1]: 90caccdd8c
  [2]: 16338a9b3a

Cc: stable@vger.kernel.org
Fixes: 5dc615520c ("LoongArch: Add BPF JIT support")
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:20 +08:00
Hengqi Chen
3f5a238f24 LoongArch: BPF: Sign extend kfunc call arguments
The kfunc calls are native calls so they should follow LoongArch calling
conventions. Sign extend its arguments properly to avoid kernel panic.
This is done by adding a new emit_abi_ext() helper. The emit_abi_ext()
helper performs extension in place meaning a value already store in the
target register (Note: this is different from the existing sign_extend()
helper and thus we can't reuse it).

Cc: stable@vger.kernel.org
Fixes: 5dc615520c ("LoongArch: Add BPF JIT support")
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:20 +08:00
Chenghao Duan
45cb47c628 LoongArch: Refactor register restoration in ftrace_common_return
Refactor the register restoration sequence in the ftrace_common_return
function to clearly distinguish between the logic of normal returns and
direct call returns in function tracing scenarios. The logic is as
follows:

1. In the case of a normal return, the execution flow returns to the
traced function, and ftrace must ensure that the register data is
consistent with the state when the function was entered.

ra = parent return address; t0 = traced function return address.

2. In the case of a direct call return, the execution flow jumps to the
custom trampoline function, and ftrace must ensure that the register
data is consistent with the state when ftrace was entered.

ra = traced function return address; t0 = parent return address.

Cc: stable@vger.kernel.org
Fixes: 9cdc3b6a29 ("LoongArch: ftrace: Add direct call support")
Signed-off-by: Chenghao Duan <duanchenghao@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:20 +08:00
Chenghao Duan
9bdc1ab5e4 LoongArch: Enable exception fixup for specific ADE subcode
This patch allows the LoongArch BPF JIT to handle recoverable memory
access errors generated by BPF_PROBE_MEM* instructions.

When a BPF program performs memory access operations, the instructions
it executes may trigger ADEM exceptions. The kernel’s built-in BPF
exception table mechanism (EX_TYPE_BPF) will generate corresponding
exception fixup entries in the JIT compilation phase; however, the
architecture-specific trap handling function needs to proactively call
the common fixup routine to achieve exception recovery.

do_ade(): fix EX_TYPE_BPF memory access exceptions for BPF programs,
ensure safe execution.

Relevant test cases: illegal address access tests in module_attach and
subprogs_extable of selftests/bpf.

Signed-off-by: Chenghao Duan <duanchenghao@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:20 +08:00
Tiezhu Yang
4cd641a79e LoongArch: Remove unnecessary checks for ORC unwinder
According to the following function definitions, __kernel_text_address()
already checks __module_text_address(), so it should remove the check of
__module_text_address() in bt_address() at least.

int __kernel_text_address(unsigned long addr)
{
	if (kernel_text_address(addr))
		return 1;
	...
	return 0;
}

int kernel_text_address(unsigned long addr)
{
	bool no_rcu;
	int ret = 1;
	...
	if (is_module_text_address(addr))
		goto out;
	...
	return ret;
}

bool is_module_text_address(unsigned long addr)
{
	guard(rcu)();
	return __module_text_address(addr) != NULL;
}

Furthermore, there are two checks of __kernel_text_address(), one is in
bt_address() and the other is after calling bt_address(), it looks like
redundant.

Handle the exception address first and then use __kernel_text_address()
to validate the calculated address for exception or the normal address
in bt_address(), then it can remove the check of __kernel_text_address()
after calling bt_address().

Just remove unnecessary checks, no functional changes intended.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:19 +08:00
Tiezhu Yang
6e5416d63b LoongArch: Remove is_entry_func() and kernel_entry_end
For now, the related code of is_entry_func() is useless, so they can be
removed. Then the symbol kernel_entry_end is not used any more, so it can
be removed too.

Link: https://lore.kernel.org/lkml/kjiyla6qj3l7ezspitulrdoc5laj2e6hoecvd254hssnpddczm@g6nkaombh6va/
Suggested-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
2025-12-31 15:19:10 +08:00
Tiezhu Yang
1b2f4706c6 LoongArch: Use UNWIND_HINT_END_OF_STACK for entry points
kernel_entry() and smpboot_entry() are the last frames for ORC unwinder,
so it is proper to use the annotation UNWIND_HINT_END_OF_STACK for them.

Link: https://lore.kernel.org/lkml/ots6w2ntyudj5ucs5eowncta2vmfssatpcqwzpar3ekk577hxi@j45dd4dmwx6x/
Suggested-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:10 +08:00
Huacai Chen
d5be446948 LoongArch: Set correct protection_map[] for VM_NONE/VM_SHARED
For 32BIT platform _PAGE_PROTNONE is 0, so set a VMA to be VM_NONE or
VM_SHARED will make pages non-present, then cause Oops with kernel page
fault.

Fix it by set correct protection_map[] for VM_NONE/VM_SHARED, replacing
_PAGE_PROTNONE with _PAGE_PRESENT.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:10 +08:00
Huacai Chen
807e5d383c LoongArch: Complete CPUCFG registers definition
According to the "LoongArch Reference Manual Volume 1: Basic
Architecture", begin with LA664 CPU core there are more features
supported which are indicated in CPUCFG2 and CPUCFG3. This patch
completes the definitions of them so as to match the architecture
specification.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2025-12-31 15:19:10 +08:00
Jiakai Xu
641ecc8900 riscv: fix KUnit test_kprobes crash when building with Clang
Clang misinterprets the placement of test_kprobes_addresses and
test_kprobes_functions arrays when they are not explicitly assigned
to a data section. This can lead to kmalloc_array() allocation
errors and KUnit failures.

When testing the Clang-compiled code in QEMU, this warning was emitted:

WARNING: CPU: 1 PID: 3000 at mm/page_alloc.c:5159 __alloc_frozen_pages_noprof+0xe6/0x2fc mm/page_alloc.c:5159

Further investigation revealed that the test_kprobes_addresses array
appeared to have over 100,000 elements, including invalid addresses;
whereas, according to test-kprobes-asm.S, test_kprobes_addresses
should only have 25 elements.

When compiling the kernel with GCC, the kernel boots correctly.

This patch fixes the issue by adding .section .rodata to explicitly
place arrays in the read-only data segment.

For detailed debug and analysis, see:
https://github.com/j1akai/temp/blob/main/20251113/readme.md

v1 -> v2:
- Drop changes to .align, and .globl.

Signed-off-by: Jiakai Xu <xujiakai2025@iscas.ac.cn>
Signed-off-by: Jiakai Xu <jiakaiPeanut@gmail.com>
Link: https://patch.msgid.link/738dd4e2.ff73.19a7cd7b4d5.Coremail.xujiakai2025@iscas.ac.cn
Link: https://github.com/llvm/llvm-project/issues/168308
Link: https://patch.msgid.link/20251226032317.1523764-1-jiakaiPeanut@gmail.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>
2025-12-30 20:10:52 -07:00
Joseph Guo
b4bf5e5589 arm64: dts: freescale: Add FRDM-IMX91 basic support
The FRDM i.MX 91 development board is a low-cost and
compact developmentboard featuring the i.MX 91 applications processor:
https://www.nxp.com/design/design-center/development-boards-and-designs/FRDM-IMX91

Add FRDM-IMX91 board dts support.
- Enable ADC1.
- Enable lpuart1 and lpuart5.
- Enable network eqos and fec.
- Enable I2C bus and children nodes under I2C bus.
- Enable USB and related nodes.
- Enable uSDHC1, uSDHC2 and uSDHC3.
- Enable MU1 and MU2.
- Enable Watchdog3.
- Enable MQS

Co-developed-by: Tom Zheng <haidong.zheng@nxp.com>
Signed-off-by: Tom Zheng <haidong.zheng@nxp.com>
Co-developed-by: Steven Yang <steven.yang@nxp.com>
Signed-off-by: Steven Yang <steven.yang@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Francesco Valla <francesco@valla.it>
Tested-by: Francesco Valla <francesco@valla.it>
Signed-off-by: Joseph Guo <qijian.guo@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2025-12-31 11:03:05 +08:00
Joseph Guo
77e18c63a3 dt-bindings: arm: fsl: Add FRDM-IMX91 board
Add the board FRDM-IMX91 in the binding document.

Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Francesco Valla <francesco@valla.it>
Tested-by: Francesco Valla <francesco@valla.it>
Signed-off-by: Joseph Guo <qijian.guo@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2025-12-31 11:02:20 +08:00
Lukas Gerlach
25fd7ee7bf riscv: Sanitize syscall table indexing under speculation
The syscall number is a user-controlled value used to index into the
syscall table. Use array_index_nospec() to clamp this value after the
bounds check to prevent speculative out-of-bounds access and subsequent
data leakage via cache side channels.

Signed-off-by: Lukas Gerlach <lukas.gerlach@cispa.de>
Link: https://patch.msgid.link/20251218191332.35849-3-lukas.gerlach@cispa.de
Signed-off-by: Paul Walmsley <pjw@kernel.org>
2025-12-30 19:57:55 -07:00
Vivian Wang
66562b66dc riscv: boot: Always make Image from vmlinux, not vmlinux.unstripped
Since commit 4b47a3aefb ("kbuild: Restore pattern to avoid stripping
.rela.dyn from vmlinux") vmlinux has .rel*.dyn preserved. Therefore, use
vmlinux to produce Image, not vmlinux.unstripped.

Doing so fixes booting a RELOCATABLE=y Image with kexec. The problem is
caused by this chain of events:

- Since commit 3e86e4d74c ("kbuild: keep .modinfo section in
  vmlinux.unstripped"), vmlinux.unstripped gets a .modinfo section.
- The .modinfo section has SHF_ALLOC, so it ends up in Image, at the end
  of it.
- The Image header's image_size field does not expect to include
  .modinfo and does not account for it, since it should not be in Image.
- If .modinfo is large enough, the file size of Image ends up larger
  than image_size, which eventually leads to it failing
  sanity_check_segment_list().

Using vmlinux instead of vmlinux.unstripped means that the unexpected
.modinfo section is gone from Image, fixing the file size problem.

Cc: stable@vger.kernel.org
Fixes: 3e86e4d74c ("kbuild: keep .modinfo section in vmlinux.unstripped")
Signed-off-by: Vivian Wang <wangruikang@iscas.ac.cn>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Han Gao <gaohan@iscas.ac.cn>
Link: https://patch.msgid.link/20251230-riscv-vmlinux-not-unstripped-v1-1-15f49df880df@iscas.ac.cn
Signed-off-by: Paul Walmsley <pjw@kernel.org>
2025-12-30 19:57:55 -07:00
Marek Vasut
00398481e0 arm64: dts: imx8mp: Update Data Modul i.MX8M Plus eDM SBC DT to rev.903
Update the DT to match newest Data Modul i.MX8M Plus eDM SBC rev.903
board which implements significant changes. Keep some of the rev.900
and rev.902 nodes in the DT so that a DTO can be used to support old
rev.900 and rev.902 boards easily.

The changes from rev.900 to rev.902 are:
- Both ethernet PHYs replaced from AR8031 to BCM54213PE
- Both ethernet PHYs MDIO address changed
- PCIe WiFi now comes with dedicated regulator
- I2C TPM chip address
- Additional GPIO expander for LVDS panel control added
- Current EEPROM I2C address changed
- Another optional EEPROM added onto another I2C bus

The changes from rev.902 to rev.903 are:
- Additional GPIO expander for WiFi and LVDS panel control added
- Multiple GPIOs are reassigned

Signed-off-by: Marek Vasut <marek.vasut@mailbox.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2025-12-31 10:25:22 +08:00
Marek Vasut
1e78a43ec0 dt-bindings: tpm: Add st,st33tphf2ei2c
Add the ST chip st33tphf2ei2c to the supported compatible strings of the
TPM TIS I2C schema. The chip is compliant with the TCG PC Client TPM
Profile specification.

For reference, a databrief is available at:
https://www.st.com/resource/en/data_brief/st33tphf2ei2c.pdf

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Marek Vasut <marek.vasut@mailbox.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2025-12-31 10:25:08 +08:00
Frank Li
6f6c18cba1 arm64: dts: imx8mp-evk: add camera ov5640 and related nodes
Add camera ov5640 and related nodes.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2025-12-31 10:17:55 +08:00
Philippe Schenker
abc8424e7f arm64: dts: colibri-imx8x: Add cma memory
Add CMA in device tree and set its size to 416MiB for all
Colibri iMX8X.
The size is tuned to be enough to play full HD video using gst-play
and to fit in the SKU with the lowest amount of RAM (1GB).

Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2025-12-31 10:12:08 +08:00
Max Krummenacher
d4dc56d822 arm64: dts: colibri-imx8x: Add wi-fi 32kHz clock
The Wi-Fi module requires a 32kHz clock to support Wi-Fi/BT low power
operation.
Setting the pinmuxing option on the connected pin to 32kHz is all
needed to generated the signal.

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2025-12-31 10:12:08 +08:00
Philippe Schenker
d703856872 arm64: dts: colibri-imx8x: Add backlight
Add a backlight node to colibri-imx8x. The node can be enabled from
an overlay once display output is implemented.

Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2025-12-31 10:12:08 +08:00
Linus Torvalds
c8ebd43345 nfsd-6.19 fixes:
A set of NFSD fixes that arrived just a bit late for the 6.19 merge
 window.
 
 Issues reported with v6.19-rc:
 - Avoid unnecessarily breaking a timestamp delegation
 
 Issues that need expedient stable backports:
 - Fix a crasher in nlm4svc_proc_test()
 - Fix nfsd_file reference leak during write delegation
 - Fix error flow in client_states_open()
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Merge tag 'nfsd-6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fixes from Chuck Lever:
 "A set of NFSD fixes that arrived just a bit late for the 6.19 merge
  window.

  Regression fix:
   - Avoid unnecessarily breaking a timestamp delegation

  Stable fixes:
   - Fix a crasher in nlm4svc_proc_test()
   - Fix nfsd_file reference leak during write delegation
   - Fix error flow in client_states_open()"

* tag 'nfsd-6.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  nfsd: Drop the client reference in client_states_open()
  nfsd: use ATTR_DELEG in nfsd4_finalize_deleg_timestamps()
  nfsd: fix nfsd_file reference leak in nfsd4_add_rdaccess_to_wrdeleg()
  lockd: fix vfs_test_lock() calls
2025-12-30 17:56:26 -08:00
Alexandre Negrel
fc5ff25009 io_uring: use GFP_NOWAIT for overflow CQEs on legacy rings
Allocate the overflowing CQE with GFP_NOWAIT instead of GFP_ATOMIC. This
changes causes allocations to fail earlier in out-of-memory situations,
rather than being deferred. Using GFP_ATOMIC allows a process to exceed
memory limits.

Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220794
Signed-off-by: Alexandre Negrel <alexandre@negrel.dev>
Link: https://lore.kernel.org/io-uring/20251229201933.515797-1-alexandre@negrel.dev/
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-12-30 18:49:31 -07:00
Alexei Starovoitov
ccaa6d2c96 Merge branch 'bpf-calls-to-bpf_loop-should-have-an-scc-and-accumulate-backedges'
Eduard Zingerman says:

====================
bpf: calls to bpf_loop() should have an SCC and accumulate backedges

This is a correctness fix for the verification of BPF programs that
work with callback-calling functions. The problem is the same as the
issue fixed by series [1] for iterator-based loops: some of the states
created while processing the callback function body might have
incomplete read or precision marks.

An example of an unsafe program that is accepted without this fix can
be found in patch #2.

There is some impact on verification performance:

File                             Program               Insns (A)  Insns (B)  Insns      (DIFF)
-------------------------------  --------------------  ---------  ---------  -----------------
pyperf600_bpf_loop.bpf.o         on_event                   4247       9985   +5738 (+135.11%)
setget_sockopt.bpf.o             skops_sockopt              5719       7446    +1727 (+30.20%)
setget_sockopt.bpf.o             socket_post_create         1253       1603     +350 (+27.93%)
strobemeta_bpf_loop.bpf.o        on_event                   3424       7224   +3800 (+110.98%)
test_tcp_custom_syncookie.bpf.o  tcp_custom_syncookie      11929      38307  +26378 (+221.12%)
xdp_synproxy_kern.bpf.o          syncookie_tc              13986      23035    +9049 (+64.70%)
xdp_synproxy_kern.bpf.o          syncookie_xdp             13881      21022    +7141 (+51.44%)

Total progs: 4172
Old success: 2520
New success: 2520
total_insns diff min:    0.00%
total_insns diff max:  221.12%
0 -> value: 0
value -> 0: 0
total_insns abs max old: 837,487
total_insns abs max new: 837,487
   0 .. 5    %: 4163
   5 .. 15   %: 2
  25 .. 35   %: 2
  50 .. 60   %: 1
  60 .. 70   %: 1
 110 .. 120  %: 1
 135 .. 145  %: 1
 220 .. 225  %: 1

[1] https://lore.kernel.org/bpf/174968344350.3524559.14906547029551737094.git-patchwork-notify@kernel.org/
---
====================

Link: https://patch.msgid.link/20251229-scc-for-callbacks-v1-0-ceadfe679900@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-12-30 15:42:42 -08:00