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mirror-linux/arch/riscv/kernel
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Alexandre Ghiti 1ff95eb2be
riscv: Fix RISCV_ALTERNATIVE_EARLY 
RISCV_ALTERNATIVE_EARLY will issue sbi_ecall() very early in the boot
process, before the first memory mapping is setup so we can't have any
instrumentation happening here.

In addition, when the kernel is relocatable, we must also not issue any
relocation this early since they would have been patched virtually only.

So, instead of disabling instrumentation for the whole kernel/sbi.c file
and compiling it with -fno-pie, simply move __sbi_ecall() and
__sbi_base_ecall() into their own file where this is fixed.

Reported-by: Conor Dooley <conor.dooley@microchip.com>
Closes: https://lore.kernel.org/linux-riscv/20240813-pony-truck-3e7a83e9759e@spud/
Reported-by: syzbot+cfbcb82adf6d7279fd35@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/linux-riscv/00000000000065062c061fcec37b@google.com/
Fixes: 1745cfafeb ("riscv: don't use global static vars to store alternative data")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20240829165048.49756-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
 		2024-09-03 07:57:55 -07:00
..
compat_vdso Makefile: remove redundant tool coverage variables 2024-05-14 23:35:48 +09:00
pi Makefile: remove redundant tool coverage variables 2024-05-14 23:35:48 +09:00
probes trace: riscv: Remove deprecated kprobe on ftrace support 2024-07-24 06:14:05 -07:00
tests treewide: replace or remove redundant def_bool in Kconfig files 2024-02-20 20:47:45 +09:00
vdso Makefile: remove redundant tool coverage variables 2024-05-14 23:35:48 +09:00
vendor_extensions riscv: Extend cpufeature.c to detect vendor extensions 2024-07-22 15:36:54 -07:00
.gitignore
…
Makefile riscv: Fix RISCV_ALTERNATIVE_EARLY 2024-09-03 07:57:55 -07:00
Makefile.syscalls syscalls: fix syscall macros for newfstat/newfstatat 2024-08-02 15:20:47 +02:00
acpi.c Merge patch "Enable SPCR table for console output on RISC-V" 2024-07-26 05:50:48 -07:00
acpi_numa.c RISC-V: ACPI: NUMA: initialize all values of acpi_early_node_map to NUMA_NO_NODE 2024-08-14 13:12:41 -07:00
alternative.c riscv: errata: Rename defines for Andes 2024-03-12 07:13:12 -07:00
asm-offsets.c ftrace: riscv: move from REGS to ARGS 2024-05-22 16:12:48 -07:00
cacheinfo.c riscv: cacheinfo: initialize cacheinfo's level and type from ACPI PPTT 2024-07-24 07:39:36 -07:00
cfi.c bpf, riscv64/cfi: Support kCFI + BPF on riscv64 2024-03-06 15:18:16 -08:00
compat_signal.c
…
compat_syscall_table.c riscv: convert to generic syscall table 2024-07-10 14:23:38 +02:00
copy-unaligned.S riscv: Use SYM_*() assembly macros instead of deprecated ones 2023-11-06 09:42:47 -08:00
copy-unaligned.h RISC-V: Probe for unaligned access speed 2023-09-01 09:06:25 -07:00
cpu-hotplug.c riscv: Use the same CPU operations for all CPUs 2024-01-04 15:03:07 -08:00
cpu.c riscv: Add vendor extensions to /proc/cpuinfo 2024-07-22 15:36:55 -07:00
cpu_ops.c riscv: Use the same CPU operations for all CPUs 2024-01-04 15:03:07 -08:00
cpu_ops_sbi.c riscv: prevent pt_regs corruption for secondary idle threads 2024-05-30 09:42:51 -07:00
cpu_ops_spinwait.c riscv: prevent pt_regs corruption for secondary idle threads 2024-05-30 09:42:51 -07:00
cpufeature.c riscv: cpufeature: Do not drop Linux-internal extensions 2024-07-31 09:53:13 -07:00
crash_dump.c
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crash_save_regs.S
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efi-header.S
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efi.c riscv: Use accessors to page table entries instead of direct dereference 2023-12-20 10:48:15 -08:00
elf_kexec.c fix missing vmalloc.h includes 2024-04-25 20:55:49 -07:00
entry.S riscv: enable HAVE_ARCH_STACKLEAK 2024-07-26 05:50:47 -07:00
fpu.S riscv: typo in comment for get_f64_reg 2024-05-22 16:12:53 -07:00
ftrace.c riscv: patch: Flush the icache right after patching to avoid illegal insns 2024-06-26 07:37:27 -07:00
head.S riscv: set trap vector earlier 2024-07-12 08:55:31 -07:00
head.h
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hibernate-asm.S riscv: Use SYM_*() assembly macros instead of deprecated ones 2023-11-06 09:42:47 -08:00
hibernate.c riscv: hibernate: remove WARN_ON in save_processor_state 2023-06-23 10:06:22 -07:00
image-vars.h efi: move screen_info into efi init code 2023-10-17 16:33:39 +02:00
irq.c Merge patch "drivers: perf: Do not broadcast to other cpus when starting a counter" 2023-11-09 06:44:13 -08:00
jump_label.c riscv: jump_label: Batch icache maintenance 2024-06-26 07:36:27 -07:00
kernel_mode_fpu.c riscv: add support for kernel-mode FPU 2024-05-19 14:36:19 -07:00
kernel_mode_vector.c riscv: vector: allow kernel-mode Vector with preemption 2024-01-16 07:14:02 -08:00
kexec_relocate.S riscv: kexec: Cleanup riscv_kexec_relocate 2023-09-20 02:53:29 -07:00
kgdb.c
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machine_kexec.c riscv: kexec: Avoid deadlock in kexec crash path 2024-07-03 13:11:30 -07:00
machine_kexec_file.c
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mcount-dyn.S ftrace: riscv: move from REGS to ARGS 2024-05-22 16:12:48 -07:00
mcount.S riscv: remove MCOUNT_NAME workaround 2024-02-22 15:38:54 -08:00
module-sections.c
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module.c arch: make execmem setup available regardless of CONFIG_MODULES 2024-05-14 00:31:44 -07:00
paravirt.c RISC-V: KVM: Rename the SBI_STA_SHMEM_DISABLE to a generic name 2024-04-22 11:13:52 +05:30
patch.c riscv: Re-introduce global icache flush in patch_text_XXX() 2024-08-06 06:49:14 -07:00
perf_callchain.c
…
perf_regs.c
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process.c riscv: process: Fix kernel gp leakage 2024-04-04 12:35:05 -07:00
ptrace.c Merge patch series "riscv: Introduce compat-mode helpers & improve arch_get_mmap_end()" 2024-03-20 08:56:05 -07:00
reset.c
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return_address.c riscv: add CALLER_ADDRx support 2024-02-22 12:17:47 -08:00
riscv_ksyms.c
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sbi-ipi.c RISC-V: Enable the IPI before workqueue_online_cpu() 2024-08-01 07:15:43 -07:00
sbi.c riscv: Fix RISCV_ALTERNATIVE_EARLY 2024-09-03 07:57:55 -07:00
sbi_ecall.c riscv: Fix RISCV_ALTERNATIVE_EARLY 2024-09-03 07:57:55 -07:00
setup.c ACPI: RISCV: Add NUMA support based on SRAT and SLIT 2024-07-22 07:13:06 -07:00
signal.c riscv: signal: Remove unlikely() from WARN_ON() condition 2024-07-26 05:50:46 -07:00
smp.c riscv: Use IPIs for remote cache/TLB flushes by default 2024-04-29 10:49:26 -07:00
smpboot.c Merge patch series "Add ACPI NUMA support for RISC-V" 2024-07-22 10:31:51 -07:00
soc.c
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stacktrace.c riscv: Improve exception and system call latency 2024-07-26 05:50:45 -07:00
suspend.c riscv: Do not save the scratch CSR during suspend 2024-04-28 14:50:36 -07:00
suspend_entry.S riscv: Use SYM_*() assembly macros instead of deprecated ones 2023-11-06 09:42:47 -08:00
sys_hwprobe.c RISC-V: hwprobe: Add SCALAR to misaligned perf defines 2024-08-14 13:13:24 -07:00
sys_riscv.c syscalls: mmap(): use unsigned offset type consistently 2024-06-25 15:57:38 +02:00
syscall_table.c riscv: convert to generic syscall table 2024-07-10 14:23:38 +02:00
time.c RISC-V: paravirt: Add skeleton for pv-time support 2023-12-30 11:25:03 +05:30
traps.c riscv: entry: always initialize regs->a0 to -ENOSYS 2024-08-14 13:12:22 -07:00
traps_misaligned.c riscv: misaligned: Restrict user access to kernel memory 2024-08-31 17:43:38 -07:00
unaligned_access_speed.c RISC-V: hwprobe: Add SCALAR to misaligned perf defines 2024-08-14 13:13:24 -07:00
vdso.c riscv: vdso: Use generic union vdso_data_store 2024-02-20 20:56:00 +01:00
vector.c riscv: vector: adjust minimum Vector requirement to ZVE32X 2024-05-30 14:33:10 -07:00
vendor_extensions.c riscv: Fix out-of-bounds when accessing Andes per hart vendor extension array 2024-08-15 13:12:16 -07:00
vmcore_info.c crash: split vmcoreinfo exporting code out from crash_core.c 2024-02-23 17:48:22 -08:00
vmlinux-xip.lds.S riscv: Check if the code to patch lies in the exit section 2024-01-09 10:58:59 -08:00
vmlinux.lds.S riscv: Check if the code to patch lies in the exit section 2024-01-09 10:58:59 -08:00