linux.git/arch/riscv/kernel, branch v6.12

Merge commit 'bf40167d54d5' into fixes

2024-10-25T13:18:43+00:00

This fix is part of a series on for-next, but it fixes broken builds so
I'm picking it up as a fix.

* commit 'bf40167d54d5':
  riscv: vdso: Prevent the compiler from inserting calls to memset()

riscv: Remove duplicated GET_RM

2024-10-25T13:18:42+00:00

The macro GET_RM defined twice in this file, one can be removed.

Reviewed-by: Alexandre Ghiti 
Signed-off-by: Chunyan Zhang 
Fixes: 956d705dd279 ("riscv: Unaligned load/store handling for M_MODE")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20241008094141.549248-3-zhangchunyan@iscas.ac.cn
Signed-off-by: Palmer Dabbelt

riscv: Remove unused GENERATING_ASM_OFFSETS

2024-10-25T13:18:41+00:00

The macro is not used in the current version of kernel, it looks like
can be removed to avoid a build warning:

../arch/riscv/kernel/asm-offsets.c: At top level:
../arch/riscv/kernel/asm-offsets.c:7: warning: macro "GENERATING_ASM_OFFSETS" is not used [-Wunused-macros]
    7 | #define GENERATING_ASM_OFFSETS

Fixes: 9639a44394b9 ("RISC-V: Provide a cleaner raw_smp_processor_id()")
Cc: stable@vger.kernel.org
Reviewed-by: Alexandre Ghiti 
Tested-by: Alexandre Ghiti 
Signed-off-by: Chunyan Zhang 
Link: https://lore.kernel.org/r/20241008094141.549248-2-zhangchunyan@iscas.ac.cn
Signed-off-by: Palmer Dabbelt

riscv: Use '%u' to format the output of 'cpu'

2024-10-25T13:18:40+00:00

'cpu' is an unsigned integer, so its conversion specifier should
be %u, not %d.

Suggested-by: Wentao Guan 
Suggested-by: Maciej W. Rozycki 
Link: https://lore.kernel.org/all/alpine.DEB.2.21.2409122309090.40372@angie.orcam.me.uk/
Signed-off-by: WangYuli 
Reviewed-by: Charlie Jenkins 
Tested-by: Charlie Jenkins 
Fixes: f1e58583b9c7 ("RISC-V: Support cpu hotplug")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/4C127DEECDA287C8+20241017032010.96772-1-wangyuli@uniontech.com
Signed-off-by: Palmer Dabbelt

riscv: Prevent a bad reference count on CPU nodes

2024-10-25T13:18:39+00:00

When populating cache leaves we previously fetched the CPU device node
at the very beginning. But when ACPI is enabled we go through a
specific branch which returns early and does not call 'of_node_put' for
the node that was acquired.

Since we are not using a CPU device node for the ACPI code anyways, we
can simply move the initialization of it just passed the ACPI block, and
we are guaranteed to have an 'of_node_put' call for the acquired node.
This prevents a bad reference count of the CPU device node.

Moreover, the previous function did not check for errors when acquiring
the device node, so a return -ENOENT has been added for that case.

Signed-off-by: Miquel Sabaté Solà 
Reviewed-by: Sudeep Holla 
Reviewed-by: Sunil V L 
Reviewed-by: Alexandre Ghiti 
Fixes: 604f32ea6909 ("riscv: cacheinfo: initialize cacheinfo's level and  type from ACPI PPTT")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240913080053.36636-1-mikisabate@gmail.com
Signed-off-by: Palmer Dabbelt

riscv: efi: Set NX compat flag in PE/COFF header

2024-10-25T13:18:38+00:00

The IMAGE_DLLCHARACTERISTICS_NX_COMPAT informs the firmware that the
EFI binary does not rely on pages that are both executable and
writable.

The flag is used by some distro versions of GRUB to decide if the EFI
binary may be executed.

As the Linux kernel neither has RWX sections nor needs RWX pages for
relocation we should set the flag.

Cc: Ard Biesheuvel 
Cc: 
Signed-off-by: Heinrich Schuchardt 
Reviewed-by: Emil Renner Berthing 
Fixes: cb7d2dd5612a ("RISC-V: Add PE/COFF header for EFI stub")
Acked-by: Ard Biesheuvel 
Link: https://lore.kernel.org/r/20240929140233.211800-1-heinrich.schuchardt@canonical.com
Signed-off-by: Palmer Dabbelt

riscv: Do not use fortify in early code

2024-10-25T13:18:36+00:00

Early code designates the code executed when the MMU is not yet enabled,
and this comes with some limitations (see
Documentation/arch/riscv/boot.rst, section "Pre-MMU execution").

FORTIFY_SOURCE must be disabled then since it can trigger kernel panics
as reported in [1].

Reported-by: Jason Montleon 
Closes: https://lore.kernel.org/linux-riscv/CAJD_bPJes4QhmXY5f63GHV9B9HFkSCoaZjk-qCT2NGS7Q9HODg@mail.gmail.com/ [1]
Fixes: a35707c3d850 ("riscv: add memory-type errata for T-Head")
Fixes: 26e7aacb83df ("riscv: Allow to downgrade paging mode from the command line")
Cc: stable@vger.kernel.org
Signed-off-by: Alexandre Ghiti 
Link: https://lore.kernel.org/r/20241009072749.45006-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt

RISC-V: ACPI: fix early_ioremap to early_memremap

2024-10-25T13:18:31+00:00

When SVPBMT is enabled, __acpi_map_table() will directly access the
data in DDR through the IO attribute, rather than through hardware
cache consistency, resulting in incorrect data in the obtained ACPI
table.

The log: ACPI: [ACPI:0x18] Invalid zero length.

We do not assume whether the bootloader flushes or not. We should
access in a cacheable way instead of maintaining cache consistency
by software.

Fixes: 3b426d4b5b14 ("RISC-V: ACPI : Fix for usage of pointers in different address space")
Cc: stable@vger.kernel.org
Reviewed-by: Alexandre Ghiti 
Signed-off-by: Yunhui Cui 
Reviewed-by: Sunil V L 
Link: https://lore.kernel.org/r/20241014130141.86426-1-cuiyunhui@bytedance.com
Signed-off-by: Palmer Dabbelt

riscv: vdso: Prevent the compiler from inserting calls to memset()

2024-10-24T17:52:52+00:00

The compiler is smart enough to insert a call to memset() in
riscv_vdso_get_cpus(), which generates a dynamic relocation.

So prevent this by using -fno-builtin option.

Fixes: e2c0cdfba7f6 ("RISC-V: User-facing API")
Cc: stable@vger.kernel.org
Signed-off-by: Alexandre Ghiti 
Reviewed-by: Guo Ren 
Link: https://lore.kernel.org/r/20241016083625.136311-2-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt

Merge tag 'riscv-for-linus-6.12-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2024-09-24T17:59:17+00:00

Pull RISC-V updates from Palmer Dabbelt:

 - Support using Zkr to seed KASLR

 - Support IPI-triggered CPU backtracing

 - Support for generic CPU vulnerabilities reporting to userspace

 - A few cleanups for missing licenses

 - The size limit on the XIP kernel has been removed

 - Support for tracing userspace stacks

 - Support for the Svvptc extension

 - Various cleanups and fixes throughout the tree

* tag 'riscv-for-linus-6.12-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (47 commits)
  crash: Fix riscv64 crash memory reserve dead loop
  perf/riscv-sbi: Add platform specific firmware event handling
  tools: Optimize ring buffer for riscv
  tools: Add riscv barrier implementation
  RISC-V: Don't have MAX_PHYSMEM_BITS exceed phys_addr_t
  ACPI: NUMA: initialize all values of acpi_early_node_map to NUMA_NO_NODE
  riscv: Enable bitops instrumentation
  riscv: Omit optimized string routines when using KASAN
  ACPI: RISCV: Make acpi_numa_get_nid() to be static
  riscv: Randomize lower bits of stack address
  selftests: riscv: Allow mmap test to compile on 32-bit
  riscv: Make riscv_isa_vendor_ext_andes array static
  riscv: Use LIST_HEAD() to simplify code
  riscv: defconfig: Disable RZ/Five peripheral support
  RISC-V: Implement kgdb_roundup_cpus() to enable future NMI Roundup
  riscv: avoid Imbalance in RAS
  riscv: cacheinfo: Add back init_cache_level() function
  riscv: Remove unused _TIF_WORK_MASK
  drivers/perf: riscv: Remove redundant macro check
  riscv: define ILLEGAL_POINTER_VALUE for 64bit
  ...