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linux-stable/arch/riscv/include/asm
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Palmer Dabbelt 6beb6bc5a8
Merge patch series "RISC-V: Test th.sxstatus.MAEE bit before enabling MAEE" 
Christoph Müllner <christoph.muellner@vrull.eu> says:

Currently, the Linux kernel suffers from a boot regression when running
on the c906 QEMU emulation. Details have been reported here by Björn Töpel:
  https://lists.gnu.org/archive/html/qemu-devel/2024-01/msg04766.html

The main issue is, that Linux enables XTheadMae for CPUs that have a T-Head
mvendorid but QEMU maintainers don't want to emulate a CPU that uses
reserved bits in PTEs. See also the following discussion for more
context:
  https://lists.gnu.org/archive/html/qemu-devel/2024-02/msg00775.html

This series renames "T-Head PBMT" to "MAE"/"XTheadMae" and only enables
it if the th.sxstatus.MAEE bit is set.

The th.sxstatus CSR is documented here:
  https://github.com/T-head-Semi/thead-extension-spec/blob/master/xtheadsxstatus.adoc

XTheadMae is documented here:
  https://github.com/T-head-Semi/thead-extension-spec/blob/master/xtheadmae.adoc

The QEMU patch to emulate th.sxstatus with the MAEE bit not set is here:
  https://lore.kernel.org/all/20240329120427.684677-1-christoph.muellner@vrull.eu/

After applying the referenced QEMU patch, this patchset allows to
successfully boot a C906 QEMU system emulation ("-cpu thead-c906").

* b4-shazam-lts:
  riscv: T-Head: Test availability bit before enabling MAE errata
  riscv: thead: Rename T-Head PBMT to MAE

Link: https://lore.kernel.org/r/20240407213236.2121592-1-christoph.muellner@vrull.eu
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
 		2024-04-26 10:21:57 -07:00
..
vdso riscv: Using TOOLCHAIN_HAS_ZIHINTPAUSE marco replace zihintpause 2023-10-31 19:15:54 -07:00
Kbuild
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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
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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 riscv/barrier: Consolidate fence definitions 2024-03-19 18:52:24 -07:00
barrier.h riscv/barrier: Add missing space after ',' 2024-03-19 18:52:25 -07:00
bitops.h RISC-V Patches for the 6.9 Merge Window 2024-03-22 10:41:13 -07:00
bug.h
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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() 2023-12-14 00:23:17 -08:00
cacheinfo.h
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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
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clocksource.h
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cmpxchg.h riscv/barrier: Consolidate fence definitions 2024-03-19 18:52:24 -07:00
compat.h riscv: Introduce set_compat_task() in asm/compat.h 2024-03-19 16:39:40 -07:00
cpu.h RISC-V: Add support to build the ACPI core 2023-06-01 08:45:01 -07:00
cpu_ops.h riscv: Use the same CPU operations for all CPUs 2024-01-04 15:03:07 -08:00
cpu_ops_sbi.h
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cpufeature.h RISC-V Patches for the 6.9 Merge Window 2024-03-22 10:41:13 -07:00
cpuidle.h
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crash_reserve.h kexec: split crashkernel reservation code out from crash_core.c 2024-02-23 17:48:21 -08:00
csr.h riscv: Fix enabling cbo.zero when running in M-mode 2024-02-29 10:20:16 -08:00
current.h
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delay.h
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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 patch series "RISC-V: Test th.sxstatus.MAEE bit before enabling MAEE" 2024-04-26 10:21:57 -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
ftrace.h - Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min 2024-03-14 18:03:09 -07:00
futex.h
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gdb_xml.h
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gpr-num.h
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hugetlb.h riscv: Fix build error if !CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION 2024-02-22 12:28:25 -08:00
hwcap.h RISC-V Patches for the 6.9 Merge Window 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
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insn-def.h RISC-V: capitalise CMO op macros 2023-11-05 09:11:23 -08:00
insn.h RISC-V Patches for the 6.6 Merge Window, Part 1 2023-09-01 08:09:48 -07:00
io.h riscv/barrier: Consolidate fence definitions 2024-03-19 18:52:24 -07:00
irq.h init: consolidate prototypes in linux/init.h 2023-06-09 17:44:16 -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
irqflags.h
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jump_label.h work around gcc bugs with 'asm goto' with outputs 2024-02-09 15:57:48 -08:00
kasan.h
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kdebug.h
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kexec.h
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kfence.h riscv: Use accessors to page table entries instead of direct dereference 2023-12-20 10:48:15 -08:00
kgdb.h
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kprobes.h riscv: Only consider swbp/ss handlers for correct privileged mode 2023-09-20 06:45:27 -07:00
kvm_aia.h RISC-V: KVM: Expose IMSIC registers as attributes of AIA irqchip 2023-06-19 22:27:58 +05:30
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_host.h KVM/riscv changes for 6.8 part #1 2024-01-02 13:19:40 -05:00
kvm_types.h
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kvm_vcpu_fp.h
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kvm_vcpu_insn.h
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kvm_vcpu_pmu.h RISC-V: KVM: Support firmware events 2023-02-07 20:36:06 +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
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kvm_vcpu_vector.h RISC-V: KVM: Improve vector save/restore functions 2023-08-08 17:26:05 +05:30
linkage.h
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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.h riscv: support the elf-fdpic binfmt loader 2023-08-23 14:17:43 -07:00
mmu_context.h
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mmzone.h
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module.h
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module.lds.h
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numa.h
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page.h Merge patch the fixes from "riscv: 64-bit NOMMU fixes and enhancements" 2024-04-09 11:41:01 -07:00
paravirt.h RISC-V: paravirt: Add skeleton for pv-time support 2023-12-30 11:25:03 +05:30
paravirt_api_clock.h RISC-V: paravirt: Add skeleton for pv-time support 2023-12-30 11:25:03 +05:30
patch.h riscv: implement a memset like function for text 2023-09-06 06:26:06 -07:00
pci.h
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perf_event.h riscv: perf: Fix callchain parse error with kernel tracepoint events 2023-06-01 10:09:22 -07:00
pgalloc.h riscv: enable MMU_GATHER_RCU_TABLE_FREE for SMP && MMU 2024-01-24 15:55:55 -08:00
pgtable-32.h RISC-V: Provide pgtable_l5_enabled on rv32 2023-10-31 19:15:50 -07:00
pgtable-64.h - Sumanth Korikkar has taught s390 to allocate hotplug-time page frames 2024-03-14 17:43:30 -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 the fixes from "riscv: 64-bit NOMMU fixes and enhancements" 2024-04-09 11:41:01 -07:00
probes.h
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processor.h Merge patch series "riscv: Introduce compat-mode helpers & improve arch_get_mmap_end()" 2024-03-20 08:56:05 -07:00
ptrace.h riscv: entry: Convert to generic entry 2023-03-23 08:47:00 -07:00
sbi.h RISC-V Patches for the 6.8 Merge Window, Part 4 2024-01-20 11:06:04 -08:00
scs.h riscv: Use separate IRQ shadow call stacks 2023-10-27 14:43:09 -07:00
seccomp.h
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sections.h riscv: Check if the code to patch lies in the exit section 2024-01-09 10:58:59 -08:00
semihost.h
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set_memory.h riscv: Prepare EFI header for relocatable kernels 2023-04-19 07:46:28 -07:00
signal.h
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signal32.h
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simd.h riscv: vector: Fix a typo of preempt_v 2024-03-15 10:17:38 -07:00
smp.h riscv: Switch to hotplug core state synchronization 2023-05-15 13:44:59 +02:00
soc.h
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sparsemem.h
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stackprotector.h
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stacktrace.h riscv: declare overflow_stack as exported from traps.c 2024-02-07 09:55:27 -08:00
string.h
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suspend.h RISC-V Patches for the 6.9 Merge Window 2024-03-22 10:41:13 -07:00
switch_to.h riscv: fpu: drop SR_SD bit checking 2024-01-16 07:13:58 -08:00
sync_core.h membarrier: riscv: Provide core serializing command 2024-02-15 08:04:14 -08:00
syscall.h riscv: Implement syscall wrappers 2023-08-23 14:16:36 -07:00
syscall_wrapper.h riscv: Mark __se_sys_* functions __used 2024-03-26 14:11:03 -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 RISC-V Patches for the 6.9 Merge Window 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: execute local TLB flush after populating vmemmap 2024-01-31 12:37:26 -08:00
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
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uprobes.h riscv: Only consider swbp/ss handlers for correct privileged mode 2023-09-20 06:45:27 -07:00
vdso.h
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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
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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