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Vivian Wang 2b29be967a riscv: cpu_ops_sbi: Use static array for boot_data Since commit `6b9f29b81b` ("riscv: Enable pcpu page first chunk allocator"), if NUMA is enabled, the page percpu allocator may be used on very sparse configurations, or when requested on boot with percpu_alloc=page. In that case, percpu data gets put in the vmalloc area. However, sbi_hsm_hart_start() needs the physical address of a sbi_hart_boot_data, and simply assumes that __pa() would work. This causes the just started hart to immediately access an invalid address and hang. Fortunately, struct sbi_hart_boot_data is not too large, so we can simply allocate an array for boot_data statically, putting it in the kernel image. This fixes NUMA=y SMP boot on Sophgo SG2042. To reproduce on QEMU: Set CONFIG_NUMA=y and CONFIG_DEBUG_VIRTUAL=y, then run with: qemu-system-riscv64 -M virt -smp 2 -nographic \ -kernel arch/riscv/boot/Image \ -append "percpu_alloc=page" Kernel output: [ 0.000000] Booting Linux on hartid 0 [ 0.000000] Linux version 6.16.0-rc1 (dram@sakuya) (riscv64-unknown-linux-gnu-gcc (GCC) 14.2.1 20250322, GNU ld (GNU Binutils) 2.44) #11 SMP Tue Jun 24 14:56:22 CST 2025 ... [ 0.000000] percpu: 28 4K pages/cpu s85784 r8192 d20712 ... [ 0.083192] smp: Bringing up secondary CPUs ... [ 0.086722] ------------[ cut here ]------------ [ 0.086849] virt_to_phys used for non-linear address: (____ptrval____) (0xff2000000001d080) [ 0.088001] WARNING: CPU: 0 PID: 1 at arch/riscv/mm/physaddr.c:14 __virt_to_phys+0xae/0xe8 [ 0.088376] Modules linked in: [ 0.088656] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.16.0-rc1 #11 NONE [ 0.088833] Hardware name: riscv-virtio,qemu (DT) [ 0.088948] epc : __virt_to_phys+0xae/0xe8 [ 0.089001] ra : __virt_to_phys+0xae/0xe8 [ 0.089037] epc : ffffffff80021eaa ra : ffffffff80021eaa sp : ff2000000004bbc0 [ 0.089057] gp : ffffffff817f49c0 tp : ff60000001d60000 t0 : 5f6f745f74726976 [ 0.089076] t1 : 0000000000000076 t2 : 705f6f745f747269 s0 : ff2000000004bbe0 [ 0.089095] s1 : ff2000000001d080 a0 : 0000000000000000 a1 : 0000000000000000 [ 0.089113] a2 : 0000000000000000 a3 : 0000000000000000 a4 : 0000000000000000 [ 0.089131] a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000000000000 [ 0.089155] s2 : ffffffff8130dc00 s3 : 0000000000000001 s4 : 0000000000000001 [ 0.089174] s5 : ffffffff8185eff8 s6 : ff2000007f1eb000 s7 : ffffffff8002a2ec [ 0.089193] s8 : 0000000000000001 s9 : 0000000000000001 s10: 0000000000000000 [ 0.089211] s11: 0000000000000000 t3 : ffffffff8180a9f7 t4 : ffffffff8180a9f7 [ 0.089960] t5 : ffffffff8180a9f8 t6 : ff2000000004b9d8 [ 0.089984] status: 0000000200000120 badaddr: ffffffff80021eaa cause: 0000000000000003 [ 0.090101] [<ffffffff80021eaa>] __virt_to_phys+0xae/0xe8 [ 0.090228] [<ffffffff8001d796>] sbi_cpu_start+0x6e/0xe8 [ 0.090247] [<ffffffff8001a5da>] __cpu_up+0x1e/0x8c [ 0.090260] [<ffffffff8002a32e>] bringup_cpu+0x42/0x258 [ 0.090277] [<ffffffff8002914c>] cpuhp_invoke_callback+0xe0/0x40c [ 0.090292] [<ffffffff800294e0>] __cpuhp_invoke_callback_range+0x68/0xfc [ 0.090320] [<ffffffff8002a96a>] _cpu_up+0x11a/0x244 [ 0.090334] [<ffffffff8002aae6>] cpu_up+0x52/0x90 [ 0.090384] [<ffffffff80c09350>] bringup_nonboot_cpus+0x78/0x118 [ 0.090411] [<ffffffff80c11060>] smp_init+0x34/0xb8 [ 0.090425] [<ffffffff80c01220>] kernel_init_freeable+0x148/0x2e4 [ 0.090442] [<ffffffff80b83802>] kernel_init+0x1e/0x14c [ 0.090455] [<ffffffff800124ca>] ret_from_fork_kernel+0xe/0xf0 [ 0.090471] [<ffffffff80b8d9c2>] ret_from_fork_kernel_asm+0x16/0x18 [ 0.090560] ---[ end trace 0000000000000000 ]--- [ 1.179875] CPU1: failed to come online [ 1.190324] smp: Brought up 1 node, 1 CPU Cc: stable@vger.kernel.org Reported-by: Han Gao <rabenda.cn@gmail.com> Fixes: `6b9f29b81b` ("riscv: Enable pcpu page first chunk allocator") Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com> Tested-by: Alexandre Ghiti <alexghiti@rivosinc.com> Signed-off-by: Vivian Wang <wangruikang@iscas.ac.cn> Link: https://lore.kernel.org/r/20250624-riscv-hsm-boot-data-array-v1-1-50b5eeafbe61@iscas.ac.cn Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>		2025-06-30 06:58:11 +00:00
arch	riscv: cpu_ops_sbi: Use static array for boot_data	2025-06-30 06:58:11 +00:00
block	block-6.16-20250626	2025-06-27 09:02:33 -07:00
certs	sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3	2024-09-20 19:52:48 +03:00
crypto	crypto: wp512 - Use API partial block handling	2025-06-23 16:56:56 +08:00
Documentation	TTY/Serial driver fixes for 6.16-rc4	2025-06-29 09:21:27 -07:00
drivers	Staging driver fix for 6.16-rc4	2025-06-29 09:25:55 -07:00
fs	six smb3 client fixes	2025-06-27 20:38:05 -07:00
include	- Make sure the new futex phash is not copied during fork in order to	2025-06-29 08:09:13 -07:00
init	init: fix build warnings about export.h	2025-06-11 22:42:36 -07:00
io_uring	io_uring-6.16-20250626	2025-06-27 08:55:57 -07:00
ipc	- The 3 patch series "hung_task: extend blocking task stacktrace dump to	2025-05-31 19:12:53 -07:00
kernel	- Make sure an AUX perf event is really disabled when it overruns	2025-06-29 08:16:02 -07:00
lib	16 hotfixes. 6 are cc:stable and the remainder address post-6.15 issues	2025-06-27 20:34:10 -07:00
LICENSES	LICENSES: add CC0-1.0 license text	2025-05-21 14:54:17 +02:00
mm	mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write	2025-06-25 15:55:03 -07:00
net	Including fixes from bluetooth and wireless.	2025-06-26 09:13:27 -07:00
rust	Driver core fixes for 6.16-rc3	2025-06-18 14:31:16 -07:00
samples	- The 3 patch series "hung_task: extend blocking task stacktrace dump to	2025-05-31 19:12:53 -07:00
scripts	scripts/gdb: fix dentry_name() lookup	2025-06-25 15:55:03 -07:00
security	selinux: change security_compute_sid to return the ssid or tsid on match	2025-06-19 16:13:16 -04:00
sound	ALSA: hda/realtek: Fix built-in mic on ASUS VivoBook X507UAR	2025-06-26 08:02:44 +02:00
tools	LoongArch fixes for v6.16-rc4	2025-06-28 11:35:11 -07:00
usr	usr/include: openrisc: don't HDRTEST bpf_perf_event.h	2025-05-12 15:03:17 +09:00
virt	Merge branch 'kvm-lockdep-common' into HEAD	2025-05-28 06:29:17 -04:00
.clang-format	Linux 6.15-rc5	2025-05-06 16:39:25 +10:00
.clippy.toml	rust: clean Rust 1.88.0's warning about `clippy::disallowed_macros` configuration	2025-05-07 00:11:47 +02:00
.cocciconfig
.editorconfig	.editorconfig: remove trim_trailing_whitespace option	2024-06-13 16:47:52 +02:00
.get_maintainer.ignore	MAINTAINERS: Retire Ralf Baechle	2024-11-12 15:48:59 +01:00
.gitattributes	.gitattributes: set diff driver for Rust source code files	2023-05-31 17:48:25 +02:00
.gitignore	.gitignore: ignore Python compiled bytecode	2025-04-24 10:12:46 -06:00
.mailmap	16 hotfixes. 6 are cc:stable and the remainder address post-6.15 issues	2025-06-27 20:34:10 -07:00
.pylintrc	docs: add a .pylintrc file with sys path for docs scripts	2025-04-09 12:10:33 -06:00
.rustfmt.toml	rust: add `.rustfmt.toml`	2022-09-28 09:02:20 +02:00
COPYING
CREDITS	CREDITS: Add entry for Shannon Nelson	2025-06-21 07:34:28 -07:00
Kbuild	drm: ensure drm headers are self-contained and pass kernel-doc	2025-02-12 10:44:43 +02:00
Kconfig	io_uring: Rename KConfig to Kconfig	2025-02-19 14:53:27 -07:00
MAINTAINERS	i2c-for-6.16-rc4	2025-06-28 15:23:17 -07:00
Makefile	Linux 6.16-rc4	2025-06-29 13:09:04 -07:00
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.