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linux/arch/riscv/include/asm
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Alexandre Ghiti 1d84afaf02 riscv: Fix fully ordered LR/SC xchg[8|16]() implementations 
The fully ordered versions of xchg[8|16]() using LR/SC lack the
necessary memory barriers to guarantee the order.

Fix this by matching what is already implemented in the fully ordered
versions of cmpxchg() using LR/SC.

Suggested-by: Andrea Parri <parri.andrea@gmail.com>
Reported-by: Andrea Parri <parri.andrea@gmail.com>
Closes: https://lore.kernel.org/linux-riscv/ZlYbupL5XgzgA0MX@andrea/T/#u
Fixes: a8ed2b7a2c ("riscv/cmpxchg: Implement xchg for variables of size 1 and 2")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Andrea Parri <parri.andrea@gmail.com>
Link: https://lore.kernel.org/r/20240530145546.394248-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2024-05-30 09:43:14 -07:00
..
vdso
riscv: Using TOOLCHAIN_HAS_ZIHINTPAUSE marco replace zihintpause
2023-10-31 19:15:54 -07:00
acenv.h
RISC-V: Add support to build the ACPI core
2023-06-01 08:45:01 -07:00
acpi.h
RISC-V: ACPI: RHCT: Add function to get CBO block sizes
2023-10-26 09:40:33 -07:00
alternative-macros.h
riscv: alternatives: fix a typo in comment
2023-08-02 13:49:07 -07:00
alternative.h
Merge patch series "Add non-coherent DMA support for AX45MP"
2023-09-08 11:24:34 -07:00
arch_hweight.h
work around gcc bugs with 'asm goto' with outputs
2024-02-09 15:57:48 -08:00
archrandom.h
RISC-V: Implement archrandom when Zkr is available
2024-01-17 18:20:49 -08:00
asm-extable.h
riscv: select DCACHE_WORD_ACCESS for efficient unaligned access HW
2024-01-09 20:18:20 -08:00
asm-offsets.h
…
asm-prototypes.h
riscv: vector: allow kernel-mode Vector with preemption
2024-01-16 07:14:02 -08:00
asm.h
riscv: blacklist assembly symbols for kprobe
2024-01-24 15:59:42 -08:00
assembler.h
RISC-V: Add arch functions to support hibernation/suspend-to-disk
2023-04-29 11:25:13 -07:00
atomic.h
Merge patch series "Rework & improve riscv cmpxchg.h and atomic.h"
2024-04-28 14:50:33 -07:00
barrier.h
riscv/barrier: Add missing space after ','
2024-03-19 18:52:25 -07:00
bitops.h
Merge tag 'riscv-for-linus-6.9-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2024-03-22 10:41:13 -07:00
bug.h
bug: Use normal relative pointers in 'struct bug_entry'
2022-05-19 23:46:10 +02:00
cache.h
riscv: mm: still create swiotlb buffer for kmalloc() bouncing if required
2024-04-30 10:35:45 -07:00
cacheflush.h
riscv: Fix early ftrace nop patching
2024-05-23 08:22:17 -07:00
cacheinfo.h
…
cfi.h
bpf, riscv64/cfi: Support kCFI + BPF on riscv64
2024-03-06 15:18:16 -08:00
checksum.h
work around gcc bugs with 'asm goto' with outputs
2024-02-09 15:57:48 -08:00
clint.h
…
clocksource.h
…
cmpxchg.h
riscv: Fix fully ordered LR/SC xchg[8|16]() implementations
2024-05-30 09:43:14 -07:00
compat.h
riscv: Introduce set_compat_task() in asm/compat.h
2024-03-19 16:39:40 -07:00
cpu_ops_sbi.h
riscv: ensure cpu_ops_sbi is declared
2022-08-11 13:46:51 -07:00
cpu_ops.h
riscv: Use the same CPU operations for all CPUs
2024-01-04 15:03:07 -08:00
cpu.h
RISC-V: Add support to build the ACPI core
2023-06-01 08:45:01 -07:00
cpufeature.h
Merge tag 'riscv-for-linus-6.9-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2024-03-22 10:41:13 -07:00
cpuidle.h
RISC-V: Enable CPU_IDLE drivers
2022-03-10 09:29:21 -08:00
crash_reserve.h
kexec: split crashkernel reservation code out from crash_core.c
2024-02-23 17:48:21 -08:00
csr.h
RISC-V: KVM: Add perf sampling support for guests
2024-04-26 13:13:50 +05:30
current.h
riscv: Rename "sp_in_global" to "current_stack_pointer"
2022-03-30 15:15:27 -07:00
delay.h
…
dma-noncoherent.h
riscv: mm: dma-noncoherent: nonstandard cache operations support
2023-09-01 09:08:57 -07:00
efi.h
Merge patch series "riscv: Introduce KASLR"
2023-09-08 11:25:13 -07:00
elf.h
riscv: Introduce set_compat_task() in asm/compat.h
2024-03-19 16:39:40 -07:00
entry-common.h
riscv: vector: do not pass task_struct into riscv_v_vstate_{save,restore}()
2024-01-16 07:13:59 -08:00
errata_list.h
Merge tag 'riscv-for-linus-6.10-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2024-05-22 09:56:00 -07:00
extable.h
riscv: mm: stub extable related functions/macros for !MMU
2023-06-14 07:17:45 -07:00
fence.h
riscv/barrier: Consolidate fence definitions
2024-03-19 18:52:24 -07:00
fixmap.h
riscv: Move early dtb mapping into the fixmap region
2023-04-13 18:14:26 -07:00
fpu.h
riscv: add support for kernel-mode FPU
2024-05-19 14:36:19 -07:00
ftrace.h
ftrace: riscv: move from REGS to ARGS
2024-05-22 16:12:48 -07:00
futex.h
riscv: extable: add a dedicated uaccess handler
2022-01-05 17:53:29 -08:00
gdb_xml.h
…
gpr-num.h
riscv: Add X register names to gpr-nums
2022-10-02 10:17:58 +05:30
hugetlb.h
mm: convert arch_clear_hugepage_flags to take a folio
2024-04-25 20:56:15 -07:00
hwcap.h
Merge tag 'riscv-for-linus-6.9-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2024-03-22 10:41:13 -07:00
hwprobe.h
RISC-V: hwprobe: Introduce which-cpus flag
2024-01-03 03:36:49 -08:00
image.h
…
insn-def.h
RISC-V: capitalise CMO op macros
2023-11-05 09:11:23 -08:00
insn.h
Merge tag 'riscv-for-linus-6.6-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2023-09-01 08:09:48 -07:00
io.h
riscv/barrier: Consolidate fence definitions
2024-03-19 18:52:24 -07:00
irq_stack.h
riscv: Deduplicate IRQ stack switching
2023-10-27 14:43:06 -07:00
irq_work.h
arch: consolidate arch_irq_work_raise prototypes
2023-11-23 11:32:29 +01:00
irq.h
init: consolidate prototypes in linux/init.h
2023-06-09 17:44:16 -07:00
irqflags.h
riscv: Remove unnecessary irqflags processor.h include
2024-04-16 18:50:52 -07:00
jump_label.h
work around gcc bugs with 'asm goto' with outputs
2024-02-09 15:57:48 -08:00
kasan.h
riscv: Implement sv48 support
2022-01-19 17:54:09 -08:00
Kbuild
RISC-V: Move to queued RW locks
2022-05-11 11:50:10 -07:00
kdebug.h
…
kexec.h
RISC-V: kexec: Fix memory leak of fdt buffer
2022-12-05 10:59:51 -08:00
kfence.h
riscv: Use accessors to page table entries instead of direct dereference
2023-12-20 10:48:15 -08:00
kgdb.h
…
kprobes.h
riscv: Only consider swbp/ss handlers for correct privileged mode
2023-09-20 06:45:27 -07:00
kvm_aia_aplic.h
RISC-V: KVM: Add APLIC related defines
2023-06-18 21:24:36 +05:30
kvm_aia_imsic.h
RISC-V: KVM: Add IMSIC related defines
2023-06-18 21:24:34 +05:30
kvm_aia.h
RISC-V: KVM: Expose IMSIC registers as attributes of AIA irqchip
2023-06-19 22:27:58 +05:30
kvm_host.h
RISCV: KVM: Introduce vcpu->reset_cntx_lock
2024-04-22 10:39:03 +05:30
kvm_types.h
KVM: RISC-V: Use common KVM implementation of MMU memory caches
2022-01-06 14:38:50 +05:30
kvm_vcpu_fp.h
RISC-V: KVM: Improve ISA extension by using a bitmap
2022-07-29 17:14:11 +05:30
kvm_vcpu_insn.h
RISC-V: KVM: Add extensible CSR emulation framework
2022-07-29 17:14:53 +05:30
kvm_vcpu_pmu.h
RISC-V: KVM: Improve firmware counter read function
2024-04-26 13:13:54 +05:30
kvm_vcpu_sbi.h
RISC-V: KVM: Add support for SBI STA registers
2023-12-30 11:26:35 +05:30
kvm_vcpu_timer.h
RISC-V: KVM: Fix kvm_riscv_vcpu_timer_pending() for Sstc
2022-10-21 11:52:45 +05:30
kvm_vcpu_vector.h
RISC-V: KVM: Improve vector save/restore functions
2023-08-08 17:26:05 +05:30
linkage.h
…
membarrier.h
membarrier: riscv: Provide core serializing command
2024-02-15 08:04:14 -08:00
mmio.h
riscv/barrier: Consolidate fence definitions
2024-03-19 18:52:24 -07:00
mmiowb.h
riscv/barrier: Consolidate fence definitions
2024-03-19 18:52:24 -07:00
mmu_context.h
…
mmu.h
Merge patch series "riscv: ASID-related and UP-related TLB flush enhancements"
2024-04-30 10:35:48 -07:00
mmzone.h
…
module.h
riscv: module: move find_section to module.h
2023-01-31 23:29:39 -08:00
module.lds.h
riscv module: remove (NOLOAD)
2022-03-29 14:31:07 -07:00
numa.h
…
page.h
Merge patch series "riscv: 64-bit NOMMU fixes and enhancements"
2024-04-28 14:50:35 -07:00
paravirt_api_clock.h
RISC-V: paravirt: Add skeleton for pv-time support
2023-12-30 11:25:03 +05:30
paravirt.h
RISC-V: paravirt: Add skeleton for pv-time support
2023-12-30 11:25:03 +05:30
patch.h
riscv: Fix text patching when IPI are used
2024-04-16 18:27:47 -07:00
pci.h
Merge tag 'riscv-for-linus-5.20-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2022-08-06 15:04:48 -07:00
perf_event.h
riscv: perf: Fix callchain parse error with kernel tracepoint events
2023-06-01 10:09:22 -07:00
pgalloc.h
riscv: Use IPIs for remote cache/TLB flushes by default
2024-04-29 10:49:26 -07:00
pgtable-32.h
RISC-V: Provide pgtable_l5_enabled on rv32
2023-10-31 19:15:50 -07:00
pgtable-64.h
riscv: Remove PGDIR_SIZE_L3 and TASK_SIZE_MIN
2024-05-16 12:59:57 -07:00
pgtable-bits.h
riscv: Improve PTDUMP to show RSW with non-zero value
2023-11-05 09:41:53 -08:00
pgtable.h
Merge patch series "riscv: access_ok() optimization"
2024-05-22 16:12:47 -07:00
probes.h
…
processor.h
Merge patch series "riscv: Create and document PR_RISCV_SET_ICACHE_FLUSH_CTX prctl"
2024-04-30 10:35:42 -07:00
ptrace.h
riscv: entry: Convert to generic entry
2023-03-23 08:47:00 -07:00
sbi.h
Merge patch series "riscv: Extension parsing fixes"
2024-05-22 16:12:58 -07:00
scs.h
riscv: Use separate IRQ shadow call stacks
2023-10-27 14:43:09 -07:00
seccomp.h
…
sections.h
riscv: Check if the code to patch lies in the exit section
2024-01-09 10:58:59 -08:00
semihost.h
riscv: Implement semihost.h for earlycon semihost driver
2023-01-19 14:58:19 +01:00
set_memory.h
riscv: Prepare EFI header for relocatable kernels
2023-04-19 07:46:28 -07:00
signal32.h
riscv: compat: signal: Add rt_frame implementation
2022-05-17 16:37:21 -07:00
simd.h
riscv: vector: Fix a typo of preempt_v
2024-03-15 10:17:38 -07:00
smp.h
riscv: Use IPIs for remote cache/TLB flushes by default
2024-04-29 10:49:26 -07:00
soc.h
…
sparsemem.h
riscv: Allow to dynamically define VA_BITS
2022-01-19 17:54:07 -08:00
stackprotector.h
stackprotector: actually use get_random_canary()
2022-11-18 02:18:10 +01:00
stacktrace.h
riscv: declare overflow_stack as exported from traps.c
2024-02-07 09:55:27 -08:00
string.h
RISC-V: add infrastructure to allow different str* implementations
2023-01-31 11:43:23 -08:00
suspend.h
riscv: Do not save the scratch CSR during suspend
2024-04-28 14:50:36 -07:00
switch_to.h
riscv: Include riscv_set_icache_flush_ctx prctl
2024-04-18 08:10:58 -07:00
sync_core.h
membarrier: riscv: Provide core serializing command
2024-02-15 08:04:14 -08:00
syscall_wrapper.h
riscv: Mark __se_sys_* functions __used
2024-03-26 14:11:03 -07:00
syscall.h
riscv: Implement syscall wrappers
2023-08-23 14:16:36 -07:00
thread_info.h
Merge patch series "riscv: support kernel-mode Vector"
2024-01-16 07:14:04 -08:00
timex.h
init: consolidate prototypes in linux/init.h
2023-06-09 17:44:16 -07:00
tlb.h
Merge tag 'riscv-for-linus-6.9-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2024-03-22 10:41:13 -07:00
tlbbatch.h
riscv: Add support for BATCHED_UNMAP_TLB_FLUSH
2024-01-11 08:01:53 -08:00
tlbflush.h
riscv: mm: Use a fixed layout for the MM context ID
2024-04-29 10:49:33 -07:00
topology.h
sched/topology: Add a new arch_scale_freq_ref() method
2023-12-23 15:52:34 +01:00
uaccess.h
riscv: Fix spurious errors from __get/put_kernel_nofault
2024-03-26 08:34:48 -07:00
unistd.h
riscv: Wire up memfd_secret in UAPI header
2022-06-01 21:46:36 -07:00
uprobes.h
riscv: Only consider swbp/ss handlers for correct privileged mode
2023-09-20 06:45:27 -07:00
vdso.h
riscv: alternative: patch alternatives in the vDSO
2023-01-31 23:29:42 -08:00
vector.h
RISC-V: add helper function to read the vector VLEN
2024-01-22 17:55:15 -08:00
vendorid_list.h
riscv: errata: Rename defines for Andes
2024-03-12 07:13:12 -07:00
vermagic.h
…
vmalloc.h
Revert "riscv: mm: support Svnapot in huge vmap"
2024-02-29 10:21:22 -08:00
word-at-a-time.h
kernel.h: removed REPEAT_BYTE from kernel.h
2024-02-01 09:47:59 -08:00
xip_fixup.h
riscv: Fixed wrong register in XIP_FIXUP_FLASH_OFFSET macro
2024-01-09 19:33:21 -08:00
xor.h
riscv: Add vector extension XOR implementation
2024-01-16 07:13:55 -08:00