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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
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
...
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The RINTC subtype structure in MADT also has information about other
interrupt controllers. Save this information and provide interfaces to
retrieve them when required by corresponding drivers.
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://patch.msgid.link/20240812005929.113499-14-sunilvl@ventanamicro.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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RISC-V has PLIC and APLIC in MADT as well as namespace devices.
Initialize the list of those structures using MADT and namespace devices
to create mapping between the ACPI handle and the GSI ranges. This will
be used later to add dependencies.
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://patch.msgid.link/20240812005929.113499-12-sunilvl@ventanamicro.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Add arch_trigger_cpumask_backtrace() which is a generic infrastructure
for sampling other CPUs' backtrace using IPI.
The feature is used when lockups are detected or in case of oops/panic
if parameters are set accordingly.
Below is the case of oops with the oops_all_cpu_backtrace enabled.
$ sysctl kernel.oops_all_cpu_backtrace=1
triggering oops shows:
[ 212.214237] NMI backtrace for cpu 1
[ 212.214390] CPU: 1 PID: 610 Comm: in:imklog Tainted: G OE 6.10.0-rc6 #1
[ 212.214570] Hardware name: riscv-virtio,qemu (DT)
[ 212.214690] epc : fallback_scalar_usercopy+0x8/0xdc
[ 212.214809] ra : _copy_to_user+0x20/0x40
[ 212.214913] epc : ffffffff80c3a930 ra : ffffffff8059ba7e sp : ff20000000eabb50
[ 212.215061] gp : ffffffff82066f90 tp : ff6000008e958000 t0 : 3463303866660000
[ 212.215210] t1 : 000000000000005b t2 : 3463303866666666 s0 : ff20000000eabb60
[ 212.215358] s1 : 0000000000000386 a0 : 00007ff6e81df926 a1 : ff600000824df800
[ 212.215505] a2 : 000000000000003f a3 : 7fffffffffffffc0 a4 : 0000000000000000
[ 212.215651] a5 : 000000000000003f a6 : 0000000000000000 a7 : 0000000000000000
[ 212.215857] s2 : ff600000824df800 s3 : ffffffff82066cc0 s4 : 0000000000001c1a
[ 212.216074] s5 : ffffffff8206a5a8 s6 : 00007ff6e81df926 s7 : ffffffff8206a5a0
[ 212.216278] s8 : ff600000824df800 s9 : ffffffff81e25de0 s10: 000000000000003f
[ 212.216471] s11: ffffffff8206a59d t3 : ff600000824df812 t4 : ff600000824df812
[ 212.216651] t5 : ff600000824df818 t6 : 0000000000040000
[ 212.216796] status: 0000000000040120 badaddr: 0000000000000000 cause: 8000000000000001
[ 212.217035] [<ffffffff80c3a930>] fallback_scalar_usercopy+0x8/0xdc
[ 212.217207] [<ffffffff80095f56>] syslog_print+0x1f4/0x2b2
[ 212.217362] [<ffffffff80096e5c>] do_syslog.part.0+0x94/0x2d8
[ 212.217502] [<ffffffff800979e8>] do_syslog+0x66/0x88
[ 212.217636] [<ffffffff803a5dda>] kmsg_read+0x44/0x5c
[ 212.217764] [<ffffffff80392dbe>] proc_reg_read+0x7a/0xa8
[ 212.217952] [<ffffffff802ff726>] vfs_read+0xb0/0x24e
[ 212.218090] [<ffffffff803001ba>] ksys_read+0x64/0xe4
[ 212.218264] [<ffffffff8030025a>] __riscv_sys_read+0x20/0x2c
[ 212.218453] [<ffffffff80c4af9a>] do_trap_ecall_u+0x60/0x1d4
[ 212.218664] [<ffffffff80c56998>] ret_from_exception+0x0/0x64
Signed-off-by: Ryo Takakura <takakura@valinux.co.jp>
Link: https://lore.kernel.org/r/20240718093659.158912-1-takakura@valinux.co.jp
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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The init/main.c file contains some extern declarations for functions
defined in architecture code, and it defines some other functions that are
called from architecture code with a custom prototype. Both of those
result in warnings with 'make W=1':
init/calibrate.c:261:37: error: no previous prototype for 'calibrate_delay_is_known' [-Werror=missing-prototypes]
init/main.c:790:20: error: no previous prototype for 'mem_encrypt_init' [-Werror=missing-prototypes]
init/main.c:792:20: error: no previous prototype for 'poking_init' [-Werror=missing-prototypes]
arch/arm64/kernel/irq.c:122:13: error: no previous prototype for 'init_IRQ' [-Werror=missing-prototypes]
arch/arm64/kernel/time.c:55:13: error: no previous prototype for 'time_init' [-Werror=missing-prototypes]
arch/x86/kernel/process.c:935:13: error: no previous prototype for 'arch_post_acpi_subsys_init' [-Werror=missing-prototypes]
init/calibrate.c:261:37: error: no previous prototype for 'calibrate_delay_is_known' [-Werror=missing-prototypes]
kernel/fork.c:991:20: error: no previous prototype for 'arch_task_cache_init' [-Werror=missing-prototypes]
Add prototypes for all of these in include/linux/init.h or another
appropriate header, and remove the duplicate declarations from
architecture specific code.
[sfr@canb.auug.org.au: declare time_init_early()]
Link: https://lkml.kernel.org/r/20230519124311.5167221c@canb.auug.org.au
Link: https://lkml.kernel.org/r/20230517131102.934196-12-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Eric Paris <eparis@redhat.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Various RISC-V drivers (such as SBI IPI, SBI Timer, SBI PMU, and
KVM RISC-V) don't have associated DT node but these drivers need
standard per-CPU (local) interrupts defined by the RISC-V privileged
specification.
We add riscv_get_intc_hwnode() in arch/riscv which allows RISC-V
drivers not having DT node to discover INTC hwnode which in-turn
helps these drivers to map per-CPU (local) interrupts provided
by the INTC driver.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230328035223.1480939-3-apatel@ventanamicro.com
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Fix the following W=1 kernel compilation warning:
arch/riscv/kernel/irq.c:19:13: warning: no previous prototype for ‘init_IRQ’ [-Wmissing-prototypes]
19 | void __init init_IRQ(void)
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Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
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Instead of directly calling RISC-V timer interrupt handler from
RISC-V local interrupt conntroller driver, this patch implements
RISC-V timer interrupt as a per-CPU interrupt using per-CPU APIs
of Linux IRQ subsystem.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
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The RISC-V per-HART local interrupt controller manages software
interrupts, timer interrupts, external interrupts (which are routed
via the platform level interrupt controller) and other per-HART
local interrupts.
We add a driver for the RISC-V local interrupt controller, which
eventually replaces the RISC-V architecture code, allowing for a
better split between arch code and drivers.
The driver is compliant with RISC-V Hart-Level Interrupt Controller
DT bindings located at:
Documentation/devicetree/bindings/interrupt-controller/riscv,cpu-intc.txt
Co-developed-by: Palmer Dabbelt <palmer@dabbelt.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
[Palmer: Cleaned up warnings]
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
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Currently, the IPI handling routine riscv_software_interrupt() does
not take any argument and also does not perform irq_enter()/irq_exit().
This patch makes IPI handling routine more self-contained by:
1. Passing "pt_regs *" argument
2. Explicitly doing irq_enter()/irq_exit()
3. Explicitly save/restore "pt_regs *" using set_irq_regs()
With above changes, IPI handling routine does not depend on caller
function to perform irq_enter()/irq_exit() and save/restore of
"pt_regs *" hence its more self-contained. This also enables us
to call IPI handling routine from IRQCHIP drivers.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
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sparse identifies several missing prototypes caused by missing
preprocessor include directives:
arch/riscv/kernel/cpufeature.c:16:6: warning: symbol 'has_fpu' was not declared. Should it be static?
arch/riscv/kernel/process.c:26:6: warning: symbol 'arch_cpu_idle' was not declared. Should it be static?
arch/riscv/kernel/reset.c:15:6: warning: symbol 'pm_power_off' was not declared. Should it be static?
arch/riscv/kernel/syscall_table.c:15:6: warning: symbol 'sys_call_table' was not declared. Should it be static?
arch/riscv/kernel/traps.c:149:13: warning: symbol 'trap_init' was not declared. Should it be static?
arch/riscv/kernel/vdso.c:54:5: warning: symbol 'arch_setup_additional_pages' was not declared. Should it be static?
arch/riscv/kernel/smp.c:64:6: warning: symbol 'arch_match_cpu_phys_id' was not declared. Should it be static?
arch/riscv/kernel/module-sections.c:89:5: warning: symbol 'module_frob_arch_sections' was not declared. Should it be static?
arch/riscv/mm/context.c:42:6: warning: symbol 'switch_mm' was not declared. Should it be static?
Fix by including the appropriate header files in the appropriate
source files.
This patch should have no functional impact.
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation version 2 this program is distributed
in the hope that it will be useful but without any warranty without
even the implied warranty of merchantability or fitness for a
particular purpose see the gnu general public license for more
details
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 97 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141901.025053186@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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These are only of use to the local irq controller driver, so add them in
that driver implementation instead, which will be submitted soon.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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Rename handle_ipi to riscv_software_interrupt, drop the unused return
value and move the prototype to irq.h together with riscv_timer_interupt.
This allows simplifying the upcoming interrupt handling support.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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This patch contains code that interfaces with devices that are mandated
by the RISC-V supervisor specification and that don't have explicit
drivers anywhere else in the tree. This includes the staticly defined
interrupts, the CSR-mapped timer, and virtualized SBI devices.
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
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