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linux-bredos/arch/riscv/include/asm
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Alexandre Ghiti 6f796a6a39 riscv: Fix IPIs usage in kfence_protect_page() 
commit b3431a8bb3 upstream.

flush_tlb_kernel_range() may use IPIs to flush the TLBs of all the
cores, which triggers the following warning when the irqs are disabled:

[    3.455330] WARNING: CPU: 1 PID: 0 at kernel/smp.c:815 smp_call_function_many_cond+0x452/0x520
[    3.456647] Modules linked in:
[    3.457218] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.12.0-rc7-00010-g91d3de7240b8 #1
[    3.457416] Hardware name: QEMU QEMU Virtual Machine, BIOS
[    3.457633] epc : smp_call_function_many_cond+0x452/0x520
[    3.457736]  ra : on_each_cpu_cond_mask+0x1e/0x30
[    3.457786] epc : ffffffff800b669a ra : ffffffff800b67c2 sp : ff2000000000bb50
[    3.457824]  gp : ffffffff815212b8 tp : ff6000008014f080 t0 : 000000000000003f
[    3.457859]  t1 : ffffffff815221e0 t2 : 000000000000000f s0 : ff2000000000bc10
[    3.457920]  s1 : 0000000000000040 a0 : ffffffff815221e0 a1 : 0000000000000001
[    3.457953]  a2 : 0000000000010000 a3 : 0000000000000003 a4 : 0000000000000000
[    3.458006]  a5 : 0000000000000000 a6 : ffffffffffffffff a7 : 0000000000000000
[    3.458042]  s2 : ffffffff815223be s3 : 00fffffffffff000 s4 : ff600001ffe38fc0
[    3.458076]  s5 : ff600001ff950d00 s6 : 0000000200000120 s7 : 0000000000000001
[    3.458109]  s8 : 0000000000000001 s9 : ff60000080841ef0 s10: 0000000000000001
[    3.458141]  s11: ffffffff81524812 t3 : 0000000000000001 t4 : ff60000080092bc0
[    3.458172]  t5 : 0000000000000000 t6 : ff200000000236d0
[    3.458203] status: 0000000200000100 badaddr: ffffffff800b669a cause: 0000000000000003
[    3.458373] [<ffffffff800b669a>] smp_call_function_many_cond+0x452/0x520
[    3.458593] [<ffffffff800b67c2>] on_each_cpu_cond_mask+0x1e/0x30
[    3.458625] [<ffffffff8000e4ca>] __flush_tlb_range+0x118/0x1ca
[    3.458656] [<ffffffff8000e6b2>] flush_tlb_kernel_range+0x1e/0x26
[    3.458683] [<ffffffff801ea56a>] kfence_protect+0xc0/0xce
[    3.458717] [<ffffffff801e9456>] kfence_guarded_free+0xc6/0x1c0
[    3.458742] [<ffffffff801e9d6c>] __kfence_free+0x62/0xc6
[    3.458764] [<ffffffff801c57d8>] kfree+0x106/0x32c
[    3.458786] [<ffffffff80588cf2>] detach_buf_split+0x188/0x1a8
[    3.458816] [<ffffffff8058708c>] virtqueue_get_buf_ctx+0xb6/0x1f6
[    3.458839] [<ffffffff805871da>] virtqueue_get_buf+0xe/0x16
[    3.458880] [<ffffffff80613d6a>] virtblk_done+0x5c/0xe2
[    3.458908] [<ffffffff8058766e>] vring_interrupt+0x6a/0x74
[    3.458930] [<ffffffff800747d8>] __handle_irq_event_percpu+0x7c/0xe2
[    3.458956] [<ffffffff800748f0>] handle_irq_event+0x3c/0x86
[    3.458978] [<ffffffff800786cc>] handle_simple_irq+0x9e/0xbe
[    3.459004] [<ffffffff80073934>] generic_handle_domain_irq+0x1c/0x2a
[    3.459027] [<ffffffff804bf87c>] imsic_handle_irq+0xba/0x120
[    3.459056] [<ffffffff80073934>] generic_handle_domain_irq+0x1c/0x2a
[    3.459080] [<ffffffff804bdb76>] riscv_intc_aia_irq+0x24/0x34
[    3.459103] [<ffffffff809d0452>] handle_riscv_irq+0x2e/0x4c
[    3.459133] [<ffffffff809d923e>] call_on_irq_stack+0x32/0x40

So only flush the local TLB and let the lazy kfence page fault handling
deal with the faults which could happen when a core has an old protected
pte version cached in its TLB. That leads to potential inaccuracies which
can be tolerated when using kfence.

Fixes: 47513f243b ("riscv: Enable KFENCE for riscv64")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20241209074125.52322-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-12-19 18:11:22 +01:00
..
vdso
riscv: Using TOOLCHAIN_HAS_ZIHINTPAUSE marco replace zihintpause
2023-11-28 17:20:13 +00:00
acenv.h
RISC-V: Add support to build the ACPI core
2023-06-01 08:45:01 -07:00
acpi.h
RISC-V: ACPI: Fix acpi_os_ioremap to return iomem address
2023-08-02 13:49:43 -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
asm-extable.h
riscv: mm: stub extable related functions/macros for !MMU
2023-06-14 07:17:45 -07:00
asm-offsets.h
…
asm-prototypes.h
riscv: VMAP_STACK overflow detection thread-safe
2023-11-28 17:19:47 +00:00
asm.h
riscv: blacklist assembly symbols for kprobe
2024-08-29 17:33:33 +02:00
assembler.h
RISC-V: Add arch functions to support hibernation/suspend-to-disk
2023-04-29 11:25:13 -07:00
atomic.h
locking/atomic: make atomic*_{cmp,}xchg optional
2023-06-05 09:57:14 +02:00
barrier.h
riscv: introduce nops and __nops macros for NOP sequences
2022-07-21 17:17:29 -07:00
bitops.h
…
bug.h
…
cache.h
riscv: allow kmalloc() caches aligned to the smallest value
2023-08-23 14:22:00 -07:00
cacheflush.h
mm: Introduce flush_cache_vmap_early()
2024-02-16 19:10:52 +01:00
cacheinfo.h
…
cfi.h
riscv: Add CFI error handling
2023-08-23 14:16:39 -07:00
clint.h
…
clocksource.h
…
cmpxchg.h
locking/arch: Rename all internal __xchg() names to __arch_xchg()
2023-04-29 09:08:44 +02:00
compat.h
…
cpu_ops_sbi.h
riscv: ensure cpu_ops_sbi is declared
2022-08-11 13:46:51 -07:00
cpu_ops.h
RISC-V: Declare cpu_ops_spinwait in <asm/cpu_ops.h>
2022-08-11 13:06:47 -07:00
cpu.h
RISC-V: Add support to build the ACPI core
2023-06-01 08:45:01 -07:00
cpufeature.h
RISC-V: Probe for unaligned access speed
2023-09-01 09:06:25 -07:00
cpuidle.h
…
csr.h
RISC-V: KVM: provide UAPI for host SATP mode
2023-08-08 17:25:40 +05:30
current.h
…
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
Merge patch series "RISC-V: mm: Make SV48 the default address space"
2023-08-31 00:18:36 -07:00
entry-common.h
riscv: entry: Convert to generic entry
2023-03-23 08:47:00 -07:00
errata_list.h
riscv: Apply SiFive CIP-1200 workaround to single-ASID sfence.vma
2024-07-11 12:49:06 +02:00
extable.h
riscv: mm: stub extable related functions/macros for !MMU
2023-06-14 07:17:45 -07:00
fence.h
…
fixmap.h
riscv: Move early dtb mapping into the fixmap region
2023-04-13 18:14:26 -07:00
ftrace.h
riscv: add CALLER_ADDRx support
2024-03-06 14:48:41 +00:00
futex.h
…
gdb_xml.h
…
gpr-num.h
riscv: Add X register names to gpr-nums
2022-10-02 10:17:58 +05:30
hugetlb.h
riscv: Fix build error if !CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
2024-03-06 14:48:37 +00:00
hwcap.h
work around gcc bugs with 'asm goto' with outputs
2024-02-23 09:24:47 +01:00
hwprobe.h
RISC-V: hwprobe: Fix vDSO SIGSEGV
2023-11-28 17:19:49 +00:00
image.h
…
insn-def.h
RISC-V: Use Zicboz in clear_page when available
2023-03-14 21:26:06 -07:00
insn.h
RISC-V: fix vector insn load/store width mask
2024-07-05 09:33:53 +02:00
io.h
RISC-V: Fix MEMREMAP_WB for systems with Svpbmt
2022-12-08 15:43:58 -08:00
irq_stack.h
riscv: stack: Support HAVE_IRQ_EXIT_ON_IRQ_STACK
2023-06-22 10:38:35 -07:00
irq_work.h
arch: consolidate arch_irq_work_raise prototypes
2024-02-05 20:14:17 +00:00
irq.h
init: consolidate prototypes in linux/init.h
2023-06-09 17:44:16 -07:00
irqflags.h
…
jump_label.h
work around gcc bugs with 'asm goto' with outputs
2024-02-23 09:24:47 +01:00
kasan.h
…
Kbuild
…
kdebug.h
…
kexec.h
RISC-V: kexec: Fix memory leak of fdt buffer
2022-12-05 10:59:51 -08:00
kfence.h
riscv: Fix IPIs usage in kfence_protect_page()
2024-12-19 18:11:22 +01:00
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
KVM: riscv: Add KVM_GET_REG_LIST API support
2023-08-09 12:15:25 +05:30
kvm_types.h
…
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: Fix to allow hpmcounter31 from the guest
2024-10-04 16:28:51 +02:00
kvm_vcpu_sbi.h
riscv: kvm: define vcpu_sbi_ext_pmu in header
2023-06-19 22:28:00 +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: Add full memory barrier in switch_mm()
2024-09-12 11:11:45 +02:00
mmio.h
riscv,mmio: Fix readX()-to-delay() ordering
2023-08-08 15:28:37 -07:00
mmiowb.h
…
mmu_context.h
…
mmu.h
riscv: support the elf-fdpic binfmt loader
2023-08-23 14:17:43 -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
…
numa.h
…
page.h
riscv: Fix loading 64-bit NOMMU kernels past the start of RAM
2024-05-02 16:32:49 +02:00
patch.h
riscv: implement a memset like function for text
2023-09-06 06:26:06 -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: convert alloc_{pmd, pte}_late() to use ptdescs
2023-08-21 13:37:57 -07:00
pgtable-32.h
…
pgtable-64.h
riscv: Use accessors to page table entries instead of direct dereference
2024-09-12 11:11:40 +02:00
pgtable-bits.h
riscv/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE
2023-02-02 22:33:09 -08:00
pgtable.h
riscv: Use accessors to page table entries instead of direct dereference
2024-09-12 11:11:40 +02:00
probes.h
…
processor.h
riscv: mm: Fixup compat arch_get_mmap_end
2024-01-31 16:18:55 -08:00
ptdump.h
…
ptrace.h
riscv: entry: Convert to generic entry
2023-03-23 08:47:00 -07:00
sbi.h
riscv: cpufeature: Fix thead vector hwcap removal
2024-10-17 15:24:11 +02:00
seccomp.h
…
sections.h
riscv: Check if the code to patch lies in the exit section
2024-01-25 15:35:50 -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
…
signal.h
RISC-V: Fix do_notify_resume / do_work_pending prototype
2023-01-24 22:13:15 -08:00
smp.h
riscv: Switch to hotplug core state synchronization
2023-05-15 13:44:59 +02:00
soc.h
…
sparsemem.h
RISC-V: Don't have MAX_PHYSMEM_BITS exceed phys_addr_t
2024-10-17 15:24:17 +02:00
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
2024-02-16 19:10:53 +01:00
string.h
RISC-V: add infrastructure to allow different str* implementations
2023-01-31 11:43:23 -08:00
suspend.h
RISC-V: Add arch functions to support hibernation/suspend-to-disk
2023-04-29 11:25:13 -07:00
switch_to.h
riscv: Add task switch support for vector
2023-06-08 07:16:43 -07:00
syscall_wrapper.h
posix-timers: Get rid of [COMPAT_]SYS_NI() uses
2024-01-20 11:51:46 +01:00
syscall.h
riscv: Implement syscall wrappers
2023-08-23 14:16:36 -07:00
thread_info.h
riscv: Remove SHADOW_OVERFLOW_STACK_SIZE macro
2024-10-17 15:24:08 +02:00
timex.h
init: consolidate prototypes in linux/init.h
2023-06-09 17:44:16 -07:00
tlb.h
riscv: Flush the tlb when a page directory is freed
2024-02-16 19:10:53 +01:00
tlbflush.h
riscv: Apply SiFive CIP-1200 workaround to single-ASID sfence.vma
2024-07-11 12:49:06 +02:00
topology.h
Merge patch series "Introduce 64b relocatable kernel"
2023-04-19 07:47:45 -07:00
uaccess.h
riscv: Fix spurious errors from __get/put_kernel_nofault
2024-04-10 16:36:04 +02:00
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: vector: export VLENB csr in __sc_riscv_v_state
2023-08-22 13:55:12 -07:00
vendorid_list.h
riscv: asm: vendorid_list: Add Andes Technology to the vendors list
2023-09-01 09:08:55 -07:00
vermagic.h
…
vmalloc.h
Revert "riscv: mm: support Svnapot in huge vmap"
2024-03-06 14:48:38 +00:00
word-at-a-time.h
…
xip_fixup.h
riscv: Fixed wrong register in XIP_FIXUP_FLASH_OFFSET macro
2024-01-25 15:35:50 -08:00