[PATCH RFC 0/4] Add support for Microwatt-based SoCs

[PATCH RFC 0/4] Add support for Microwatt-based SoCs

[Paul Mackerras]

This patch series adds support for running Linux on a Microwatt SoC
(system on chip) implementation on an FPGA.  Microwatt is a small
Power ISA implementation, targetted at FPGAs, aiming for PowerISA
v3.0B compliance.  It does not currently implement any floating-point
or vector instructions, hypervisor mode, big-endian mode, 32-bit mode,
or the HPT/SLB MMU facilities.  However, it does support enough to run
Linux (as of my "mmu" branch plus Ben's "litedram" branch").

Paul.

[PATCH RFC 1/4] powerpc/radix: Fix compilation for radix with CONFIG_SMP=n

[Paul Mackerras]

This fixes the compile errors we currently get with CONFIG_SMP=n and
CONFIG_PPC_RADIX_MMU=y.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
---
 arch/powerpc/include/asm/book3s/64/tlbflush-radix.h | 2 ++
 arch/powerpc/mm/book3s64/radix_tlb.c                | 2 --
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/64/tlbflush-radix.h b/arch/powerpc/include/asm/book3s/64/tlbflush-radix.h
index ca8db193ae38..adcc6114d170 100644
--- a/arch/powerpc/include/asm/book3s/64/tlbflush-radix.h
+++ b/arch/powerpc/include/asm/book3s/64/tlbflush-radix.h
@@ -68,6 +68,8 @@ extern void radix__flush_tlb_page_psize(struct mm_struct *mm, unsigned long vmad
 #define radix__flush_all_mm(mm)		radix__local_flush_all_mm(mm)
 #define radix__flush_tlb_page(vma,addr)	radix__local_flush_tlb_page(vma,addr)
 #define radix__flush_tlb_page_psize(mm,addr,p) radix__local_flush_tlb_page_psize(mm,addr,p)
+#define exit_flush_lazy_tlbs(mm)	do { } while (0)
+#define __flush_all_mm(mm, fullmm)	radix__local_flush_all_mm(mm)
 #endif
 extern void radix__flush_tlb_pwc(struct mmu_gather *tlb, unsigned long addr);
 extern void radix__flush_tlb_collapsed_pmd(struct mm_struct *mm, unsigned long addr);
diff --git a/arch/powerpc/mm/book3s64/radix_tlb.c b/arch/powerpc/mm/book3s64/radix_tlb.c
index 03f43c924e00..e3ea026cf91e 100644
--- a/arch/powerpc/mm/book3s64/radix_tlb.c
+++ b/arch/powerpc/mm/book3s64/radix_tlb.c
@@ -776,8 +776,6 @@ void radix__flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
 }
 EXPORT_SYMBOL(radix__flush_tlb_page);
 
-#else /* CONFIG_SMP */
-#define radix__flush_all_mm radix__local_flush_all_mm
 #endif /* CONFIG_SMP */
 
 static void do_tlbiel_kernel(void *info)
-- 
2.25.3

Re: [PATCH RFC 1/4] powerpc/radix: Fix compilation for radix with CONFIG_SMP=n

[Nicholas Piggin]

Excerpts from Paul Mackerras's message of May 9, 2020 3:02 pm:
> This fixes the compile errors we currently get with CONFIG_SMP=n and
> CONFIG_PPC_RADIX_MMU=y.

Did I already fix this, or does it keep getting broken?! :(

Anyway fine by me if it's required.

Thanks,
Nick

Re: [PATCH RFC 1/4] powerpc/radix: Fix compilation for radix with CONFIG_SMP=n

[Joel Stanley]

On Sat, 9 May 2020 at 07:52, Nicholas Piggin <npiggin@gmail.com> wrote:
>
> Excerpts from Paul Mackerras's message of May 9, 2020 3:02 pm:
> > This fixes the compile errors we currently get with CONFIG_SMP=n and
> > CONFIG_PPC_RADIX_MMU=y.
>
> Did I already fix this, or does it keep getting broken?! :(
>
> Anyway fine by me if it's required.

You're right, your fix was merged in 5.7-rc1.

Cheers,

Joel

[PATCH RFC 2/4] powerpc: Add Microwatt platform

[Paul Mackerras]

Microwatt is a FPGA-based implementation of the Power ISA.  It
currently only implements little-endian 64-bit mode, and does
not (yet) support SMP.

This adds a new machine type to support FPGA-based SoCs with a
Microwatt core.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
---
 arch/powerpc/Kconfig                      |    2 +-
 arch/powerpc/configs/microwatt_defconfig  | 1418 +++++++++++++++++++++
 arch/powerpc/platforms/Kconfig            |    1 +
 arch/powerpc/platforms/Makefile           |    1 +
 arch/powerpc/platforms/microwatt/Kconfig  |    9 +
 arch/powerpc/platforms/microwatt/Makefile |    1 +
 arch/powerpc/platforms/microwatt/setup.c  |   40 +
 7 files changed, 1471 insertions(+), 1 deletion(-)
 create mode 100644 arch/powerpc/configs/microwatt_defconfig
 create mode 100644 arch/powerpc/platforms/microwatt/Kconfig
 create mode 100644 arch/powerpc/platforms/microwatt/Makefile
 create mode 100644 arch/powerpc/platforms/microwatt/setup.c

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 497b7d0b2d7e..97286b8312f5 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -407,7 +407,7 @@ config HUGETLB_PAGE_SIZE_VARIABLE
 
 config MATH_EMULATION
 	bool "Math emulation"
-	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE
+	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
 	help
 	  Some PowerPC chips designed for embedded applications do not have
 	  a floating-point unit and therefore do not implement the
diff --git a/arch/powerpc/configs/microwatt_defconfig b/arch/powerpc/configs/microwatt_defconfig
new file mode 100644
index 000000000000..f4f4c965a786
--- /dev/null
+++ b/arch/powerpc/configs/microwatt_defconfig
@@ -0,0 +1,1418 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Linux/powerpc 5.6.0 Kernel Configuration
+#
+
+#
+# Compiler: powerpc64le-linux-gnu-gcc (GCC) 9.2.1 20190827 (Red Hat Cross 9.2.1-1)
+#
+CONFIG_CC_IS_GCC=y
+CONFIG_GCC_VERSION=90201
+CONFIG_CLANG_VERSION=0
+CONFIG_CC_HAS_ASM_GOTO=y
+CONFIG_CC_HAS_ASM_INLINE=y
+CONFIG_CC_HAS_WARN_MAYBE_UNINITIALIZED=y
+CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED=y
+CONFIG_IRQ_WORK=y
+CONFIG_BUILDTIME_TABLE_SORT=y
+CONFIG_THREAD_INFO_IN_TASK=y
+
+#
+# General setup
+#
+CONFIG_BROKEN_ON_SMP=y
+CONFIG_INIT_ENV_ARG_LIMIT=32
+# CONFIG_COMPILE_TEST is not set
+CONFIG_LOCALVERSION=""
+CONFIG_LOCALVERSION_AUTO=y
+CONFIG_BUILD_SALT=""
+CONFIG_HAVE_KERNEL_GZIP=y
+CONFIG_HAVE_KERNEL_XZ=y
+# CONFIG_KERNEL_GZIP is not set
+CONFIG_KERNEL_XZ=y
+CONFIG_DEFAULT_HOSTNAME="arty"
+# CONFIG_SWAP is not set
+# CONFIG_SYSVIPC is not set
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+# CONFIG_USELIB is not set
+CONFIG_HAVE_ARCH_AUDITSYSCALL=y
+
+#
+# IRQ subsystem
+#
+CONFIG_GENERIC_IRQ_SHOW=y
+CONFIG_GENERIC_IRQ_SHOW_LEVEL=y
+CONFIG_HARDIRQS_SW_RESEND=y
+CONFIG_IRQ_DOMAIN=y
+CONFIG_IRQ_FORCED_THREADING=y
+CONFIG_SPARSE_IRQ=y
+# end of IRQ subsystem
+
+CONFIG_GENERIC_TIME_VSYSCALL=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_CMOS_UPDATE=y
+
+#
+# Timers subsystem
+#
+CONFIG_TICK_ONESHOT=y
+CONFIG_HZ_PERIODIC=y
+# CONFIG_NO_HZ_IDLE is not set
+# CONFIG_NO_HZ is not set
+CONFIG_HIGH_RES_TIMERS=y
+# end of Timers subsystem
+
+# CONFIG_PREEMPT_NONE is not set
+CONFIG_PREEMPT_VOLUNTARY=y
+# CONFIG_PREEMPT is not set
+
+#
+# CPU/Task time and stats accounting
+#
+CONFIG_TICK_CPU_ACCOUNTING=y
+# CONFIG_VIRT_CPU_ACCOUNTING_NATIVE is not set
+# CONFIG_VIRT_CPU_ACCOUNTING_GEN is not set
+# CONFIG_IRQ_TIME_ACCOUNTING is not set
+# CONFIG_BSD_PROCESS_ACCT is not set
+# CONFIG_PSI is not set
+# end of CPU/Task time and stats accounting
+
+#
+# RCU Subsystem
+#
+CONFIG_TINY_RCU=y
+# CONFIG_RCU_EXPERT is not set
+CONFIG_SRCU=y
+CONFIG_TINY_SRCU=y
+# end of RCU Subsystem
+
+# CONFIG_IKCONFIG is not set
+# CONFIG_IKHEADERS is not set
+CONFIG_LOG_BUF_SHIFT=16
+CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=12
+
+#
+# Scheduler features
+#
+# end of Scheduler features
+
+CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
+CONFIG_CC_HAS_INT128=y
+# CONFIG_CGROUPS is not set
+# CONFIG_NAMESPACES is not set
+# CONFIG_CHECKPOINT_RESTORE is not set
+# CONFIG_SCHED_AUTOGROUP is not set
+# CONFIG_SYSFS_DEPRECATED is not set
+# CONFIG_RELAY is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="rootfs.cpio"
+CONFIG_INITRAMFS_ROOT_UID=0
+CONFIG_INITRAMFS_ROOT_GID=0
+# CONFIG_RD_GZIP is not set
+# CONFIG_RD_BZIP2 is not set
+# CONFIG_RD_LZMA is not set
+CONFIG_RD_XZ=y
+# CONFIG_RD_LZO is not set
+# CONFIG_RD_LZ4 is not set
+CONFIG_INITRAMFS_COMPRESSION_XZ=y
+# CONFIG_INITRAMFS_COMPRESSION_NONE is not set
+# CONFIG_BOOT_CONFIG is not set
+# CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE is not set
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_HAVE_LD_DEAD_CODE_DATA_ELIMINATION=y
+# CONFIG_LD_DEAD_CODE_DATA_ELIMINATION is not set
+CONFIG_SYSCTL=y
+CONFIG_SYSCTL_EXCEPTION_TRACE=y
+CONFIG_EXPERT=y
+CONFIG_MULTIUSER=y
+# CONFIG_SGETMASK_SYSCALL is not set
+# CONFIG_SYSFS_SYSCALL is not set
+# CONFIG_FHANDLE is not set
+CONFIG_POSIX_TIMERS=y
+CONFIG_PRINTK=y
+CONFIG_PRINTK_NMI=y
+CONFIG_BUG=y
+# CONFIG_BASE_FULL is not set
+CONFIG_FUTEX=y
+CONFIG_FUTEX_PI=y
+# CONFIG_EPOLL is not set
+# CONFIG_SIGNALFD is not set
+# CONFIG_TIMERFD is not set
+# CONFIG_EVENTFD is not set
+# CONFIG_SHMEM is not set
+# CONFIG_AIO is not set
+# CONFIG_IO_URING is not set
+# CONFIG_ADVISE_SYSCALLS is not set
+# CONFIG_MEMBARRIER is not set
+CONFIG_KALLSYMS=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_KALLSYMS_BASE_RELATIVE=y
+# CONFIG_BPF_SYSCALL is not set
+# CONFIG_USERFAULTFD is not set
+CONFIG_ARCH_HAS_MEMBARRIER_CALLBACKS=y
+# CONFIG_RSEQ is not set
+CONFIG_EMBEDDED=y
+CONFIG_HAVE_PERF_EVENTS=y
+# CONFIG_PC104 is not set
+
+#
+# Kernel Performance Events And Counters
+#
+# CONFIG_PERF_EVENTS is not set
+# end of Kernel Performance Events And Counters
+
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_SLUB_DEBUG is not set
+# CONFIG_COMPAT_BRK is not set
+# CONFIG_SLAB is not set
+CONFIG_SLUB=y
+# CONFIG_SLOB is not set
+# CONFIG_SLAB_MERGE_DEFAULT is not set
+# CONFIG_SLAB_FREELIST_RANDOM is not set
+# CONFIG_SLAB_FREELIST_HARDENED is not set
+# CONFIG_SHUFFLE_PAGE_ALLOCATOR is not set
+# CONFIG_PROFILING is not set
+# end of General setup
+
+CONFIG_PPC64=y
+
+#
+# Processor support
+#
+CONFIG_PPC_BOOK3S_64=y
+# CONFIG_PPC_BOOK3E_64 is not set
+CONFIG_GENERIC_CPU=y
+# CONFIG_POWER7_CPU is not set
+# CONFIG_POWER8_CPU is not set
+# CONFIG_POWER9_CPU is not set
+CONFIG_PPC_BOOK3S=y
+CONFIG_PPC_FPU=y
+# CONFIG_ALTIVEC is not set
+CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y
+CONFIG_PPC_RADIX_MMU=y
+CONFIG_PPC_RADIX_MMU_DEFAULT=y
+CONFIG_PPC_HAVE_KUEP=y
+# CONFIG_PPC_KUEP is not set
+CONFIG_PPC_HAVE_KUAP=y
+# CONFIG_PPC_KUAP is not set
+# CONFIG_PPC_KUAP_DEBUG is not set
+CONFIG_PPC_MM_SLICES=y
+CONFIG_PPC_HAVE_PMU_SUPPORT=y
+# CONFIG_SMP is not set
+# end of Processor support
+
+# CONFIG_CPU_BIG_ENDIAN is not set
+CONFIG_CPU_LITTLE_ENDIAN=y
+CONFIG_PPC64_BOOT_WRAPPER=y
+CONFIG_64BIT=y
+CONFIG_MMU=y
+CONFIG_ARCH_MMAP_RND_BITS_MAX=33
+CONFIG_ARCH_MMAP_RND_BITS_MIN=18
+CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=17
+CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MIN=11
+CONFIG_HAVE_SETUP_PER_CPU_AREA=y
+CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
+CONFIG_NR_IRQS=64
+CONFIG_STACKTRACE_SUPPORT=y
+CONFIG_TRACE_IRQFLAGS_SUPPORT=y
+CONFIG_LOCKDEP_SUPPORT=y
+CONFIG_GENERIC_HWEIGHT=y
+CONFIG_PPC=y
+CONFIG_PPC_BARRIER_NOSPEC=y
+CONFIG_EARLY_PRINTK=y
+CONFIG_PANIC_TIMEOUT=10
+CONFIG_COMPAT=y
+CONFIG_SCHED_OMIT_FRAME_POINTER=y
+CONFIG_AUDIT_ARCH=y
+CONFIG_GENERIC_BUG=y
+CONFIG_ARCH_HIBERNATION_POSSIBLE=y
+CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
+CONFIG_ARCH_SUPPORTS_UPROBES=y
+CONFIG_PPC_DAWR=y
+CONFIG_PGTABLE_LEVELS=4
+CONFIG_PPC_XICS=y
+
+#
+# Platform support
+#
+# CONFIG_PPC_POWERNV is not set
+# CONFIG_PPC_PSERIES is not set
+CONFIG_PPC_MICROWATT=y
+# CONFIG_KVM_GUEST is not set
+# CONFIG_EPAPR_PARAVIRT is not set
+CONFIG_PPC_NATIVE=y
+# CONFIG_PPC_OF_BOOT_TRAMPOLINE is not set
+CONFIG_PPC_DT_CPU_FTRS=y
+CONFIG_PPC_SMP_MUXED_IPI=y
+
+#
+# CPU Frequency scaling
+#
+CONFIG_CPU_FREQ=y
+# CONFIG_CPU_FREQ_STAT is not set
+CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
+# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
+# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
+# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
+# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
+CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
+# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
+# CONFIG_CPU_FREQ_GOV_USERSPACE is not set
+# CONFIG_CPU_FREQ_GOV_ONDEMAND is not set
+# CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set
+
+#
+# CPU frequency scaling drivers
+#
+# end of CPU Frequency scaling
+
+#
+# CPUIdle driver
+#
+
+#
+# CPU Idle
+#
+# CONFIG_CPU_IDLE is not set
+# end of CPU Idle
+# end of CPUIdle driver
+
+# CONFIG_GEN_RTC is not set
+# end of Platform support
+
+#
+# Kernel options
+#
+CONFIG_HZ_100=y
+# CONFIG_HZ_250 is not set
+# CONFIG_HZ_300 is not set
+# CONFIG_HZ_1000 is not set
+CONFIG_HZ=100
+CONFIG_SCHED_HRTICK=y
+CONFIG_MATH_EMULATION=y
+CONFIG_MATH_EMULATION_FULL=y
+# CONFIG_MATH_EMULATION_HW_UNIMPLEMENTED is not set
+# CONFIG_LD_HEAD_STUB_CATCH is not set
+CONFIG_MPROFILE_KERNEL=y
+CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
+CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
+# CONFIG_PPC64_SUPPORTS_MEMORY_FAILURE is not set
+# CONFIG_KEXEC is not set
+# CONFIG_RELOCATABLE is not set
+# CONFIG_CRASH_DUMP is not set
+# CONFIG_NUMA is not set
+CONFIG_ARCH_SELECT_MEMORY_MODEL=y
+CONFIG_ARCH_FLATMEM_ENABLE=y
+CONFIG_ARCH_SPARSEMEM_ENABLE=y
+CONFIG_ARCH_SPARSEMEM_DEFAULT=y
+CONFIG_SYS_SUPPORTS_HUGETLBFS=y
+CONFIG_ILLEGAL_POINTER_VALUE=0x5deadbeef0000000
+CONFIG_PPC_4K_PAGES=y
+# CONFIG_PPC_64K_PAGES is not set
+CONFIG_PPC_PAGE_SHIFT=12
+CONFIG_THREAD_SHIFT=14
+CONFIG_ETEXT_SHIFT=12
+CONFIG_DATA_SHIFT=12
+CONFIG_FORCE_MAX_ZONEORDER=13
+# CONFIG_PPC_DENORMALISATION is not set
+# CONFIG_CMDLINE_BOOL is not set
+CONFIG_CMDLINE=""
+CONFIG_EXTRA_TARGETS=""
+# CONFIG_PM is not set
+# CONFIG_SECCOMP is not set
+# CONFIG_PPC_MEM_KEYS is not set
+# end of Kernel options
+
+#
+# Bus options
+#
+# CONFIG_FSL_LBC is not set
+# end of Bus options
+
+CONFIG_PAGE_OFFSET=0xc000000000000000
+CONFIG_KERNEL_START=0xc000000000000000
+CONFIG_PHYSICAL_START=0x00000000
+# CONFIG_VIRTUALIZATION is not set
+CONFIG_HAVE_LIVEPATCH=y
+
+#
+# General architecture-dependent options
+#
+CONFIG_HAVE_OPROFILE=y
+# CONFIG_JUMP_LABEL is not set
+CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
+CONFIG_ARCH_USE_BUILTIN_BSWAP=y
+CONFIG_HAVE_IOREMAP_PROT=y
+CONFIG_HAVE_KPROBES=y
+CONFIG_HAVE_KRETPROBES=y
+CONFIG_HAVE_OPTPROBES=y
+CONFIG_HAVE_KPROBES_ON_FTRACE=y
+CONFIG_HAVE_FUNCTION_ERROR_INJECTION=y
+CONFIG_HAVE_NMI=y
+CONFIG_HAVE_ARCH_TRACEHOOK=y
+CONFIG_GENERIC_SMP_IDLE_THREAD=y
+CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
+CONFIG_HAVE_ASM_MODVERSIONS=y
+CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
+CONFIG_HAVE_RSEQ=y
+CONFIG_HAVE_PERF_EVENTS_NMI=y
+CONFIG_HAVE_NMI_WATCHDOG=y
+CONFIG_HAVE_HARDLOCKUP_DETECTOR_ARCH=y
+CONFIG_HAVE_PERF_REGS=y
+CONFIG_HAVE_PERF_USER_STACK_DUMP=y
+CONFIG_HAVE_ARCH_JUMP_LABEL=y
+CONFIG_MMU_GATHER_TABLE_FREE=y
+CONFIG_MMU_GATHER_RCU_TABLE_FREE=y
+CONFIG_MMU_GATHER_PAGE_SIZE=y
+CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y
+CONFIG_ARCH_WEAK_RELEASE_ACQUIRE=y
+CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
+CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION=y
+CONFIG_ARCH_WANT_OLD_COMPAT_IPC=y
+CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
+CONFIG_HAVE_STACKPROTECTOR=y
+CONFIG_CC_HAS_STACKPROTECTOR_NONE=y
+# CONFIG_STACKPROTECTOR is not set
+CONFIG_HAVE_CONTEXT_TRACKING=y
+CONFIG_HAVE_VIRT_CPU_ACCOUNTING=y
+CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
+CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
+CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
+CONFIG_HAVE_ARCH_HUGE_VMAP=y
+CONFIG_HAVE_ARCH_SOFT_DIRTY=y
+CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
+CONFIG_MODULES_USE_ELF_RELA=y
+CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
+CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
+CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
+CONFIG_ARCH_MMAP_RND_BITS=18
+CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS=y
+CONFIG_ARCH_MMAP_RND_COMPAT_BITS=11
+CONFIG_HAVE_COPY_THREAD_TLS=y
+CONFIG_HAVE_RELIABLE_STACKTRACE=y
+CONFIG_HAVE_ARCH_NVRAM_OPS=y
+CONFIG_CLONE_BACKWARDS=y
+CONFIG_OLD_SIGSUSPEND=y
+CONFIG_COMPAT_OLD_SIGACTION=y
+CONFIG_COMPAT_32BIT_TIME=y
+CONFIG_ARCH_OPTIONAL_KERNEL_RWX=y
+CONFIG_ARCH_HAS_STRICT_KERNEL_RWX=y
+# CONFIG_STRICT_KERNEL_RWX is not set
+CONFIG_ARCH_HAS_PHYS_TO_DMA=y
+
+#
+# GCOV-based kernel profiling
+#
+CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
+# end of GCOV-based kernel profiling
+
+CONFIG_PLUGIN_HOSTCC=""
+CONFIG_HAVE_GCC_PLUGINS=y
+# end of General architecture-dependent options
+
+CONFIG_RT_MUTEXES=y
+CONFIG_BASE_SMALL=1
+# CONFIG_MODULES is not set
+CONFIG_BLOCK=y
+CONFIG_BLK_SCSI_REQUEST=y
+CONFIG_BLK_DEV_BSG=y
+# CONFIG_BLK_DEV_BSGLIB is not set
+# CONFIG_BLK_DEV_INTEGRITY is not set
+# CONFIG_BLK_DEV_ZONED is not set
+# CONFIG_BLK_CMDLINE_PARSER is not set
+# CONFIG_BLK_WBT is not set
+# CONFIG_BLK_SED_OPAL is not set
+
+#
+# Partition Types
+#
+# CONFIG_PARTITION_ADVANCED is not set
+CONFIG_MSDOS_PARTITION=y
+CONFIG_EFI_PARTITION=y
+# end of Partition Types
+
+CONFIG_BLOCK_COMPAT=y
+
+#
+# IO Schedulers
+#
+CONFIG_MQ_IOSCHED_DEADLINE=y
+# CONFIG_MQ_IOSCHED_KYBER is not set
+# CONFIG_IOSCHED_BFQ is not set
+# end of IO Schedulers
+
+CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
+CONFIG_INLINE_READ_UNLOCK=y
+CONFIG_INLINE_READ_UNLOCK_IRQ=y
+CONFIG_INLINE_WRITE_UNLOCK=y
+CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
+CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
+CONFIG_ARCH_HAS_MMIOWB=y
+
+#
+# Executable file formats
+#
+CONFIG_BINFMT_ELF=y
+CONFIG_COMPAT_BINFMT_ELF=y
+CONFIG_ELFCORE=y
+CONFIG_BINFMT_SCRIPT=y
+# CONFIG_BINFMT_MISC is not set
+# CONFIG_COREDUMP is not set
+# end of Executable file formats
+
+#
+# Memory Management options
+#
+CONFIG_SELECT_MEMORY_MODEL=y
+# CONFIG_FLATMEM_MANUAL is not set
+CONFIG_SPARSEMEM_MANUAL=y
+CONFIG_SPARSEMEM=y
+CONFIG_HAVE_MEMORY_PRESENT=y
+CONFIG_SPARSEMEM_EXTREME=y
+CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
+CONFIG_SPARSEMEM_VMEMMAP=y
+CONFIG_HAVE_MEMBLOCK_NODE_MAP=y
+CONFIG_HAVE_FAST_GUP=y
+CONFIG_ARCH_KEEP_MEMBLOCK=y
+# CONFIG_MEMORY_HOTPLUG is not set
+CONFIG_SPLIT_PTLOCK_CPUS=4
+# CONFIG_COMPACTION is not set
+# CONFIG_MIGRATION is not set
+CONFIG_PHYS_ADDR_T_64BIT=y
+# CONFIG_KSM is not set
+CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
+# CONFIG_TRANSPARENT_HUGEPAGE is not set
+CONFIG_NEED_PER_CPU_KM=y
+# CONFIG_CLEANCACHE is not set
+# CONFIG_CMA is not set
+# CONFIG_ZPOOL is not set
+# CONFIG_ZBUD is not set
+# CONFIG_ZSMALLOC is not set
+CONFIG_GENERIC_EARLY_IOREMAP=y
+# CONFIG_IDLE_PAGE_TRACKING is not set
+CONFIG_ARCH_HAS_PTE_DEVMAP=y
+# CONFIG_PERCPU_STATS is not set
+# CONFIG_GUP_BENCHMARK is not set
+CONFIG_ARCH_HAS_PTE_SPECIAL=y
+# end of Memory Management options
+
+# CONFIG_NET is not set
+CONFIG_HAVE_EBPF_JIT=y
+
+#
+# Device Drivers
+#
+# CONFIG_PCCARD is not set
+
+#
+# Generic Driver Options
+#
+# CONFIG_UEVENT_HELPER is not set
+# CONFIG_DEVTMPFS is not set
+# CONFIG_STANDALONE is not set
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+
+#
+# Firmware loader
+#
+# CONFIG_FW_LOADER is not set
+# end of Firmware loader
+
+# CONFIG_ALLOW_DEV_COREDUMP is not set
+# CONFIG_DEBUG_DRIVER is not set
+# CONFIG_DEBUG_DEVRES is not set
+# CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set
+CONFIG_GENERIC_CPU_AUTOPROBE=y
+CONFIG_GENERIC_CPU_VULNERABILITIES=y
+# end of Generic Driver Options
+
+#
+# Bus devices
+#
+# end of Bus devices
+
+# CONFIG_GNSS is not set
+# CONFIG_MTD is not set
+CONFIG_DTC=y
+CONFIG_OF=y
+# CONFIG_OF_UNITTEST is not set
+CONFIG_OF_FLATTREE=y
+CONFIG_OF_EARLY_FLATTREE=y
+CONFIG_OF_KOBJ=y
+CONFIG_OF_ADDRESS=y
+CONFIG_OF_IRQ=y
+CONFIG_OF_RESERVED_MEM=y
+# CONFIG_OF_OVERLAY is not set
+CONFIG_OF_DMA_DEFAULT_COHERENT=y
+CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
+# CONFIG_PARPORT is not set
+CONFIG_BLK_DEV=y
+# CONFIG_BLK_DEV_NULL_BLK is not set
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_LOOP_MIN_COUNT=8
+# CONFIG_BLK_DEV_CRYPTOLOOP is not set
+
+#
+# DRBD disabled because PROC_FS or INET not selected
+#
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_COUNT=16
+CONFIG_BLK_DEV_RAM_SIZE=4096
+# CONFIG_CDROM_PKTCDVD is not set
+
+#
+# NVME Support
+#
+# CONFIG_NVME_FC is not set
+# end of NVME Support
+
+#
+# Misc devices
+#
+# CONFIG_DUMMY_IRQ is not set
+# CONFIG_ENCLOSURE_SERVICES is not set
+# CONFIG_SRAM is not set
+# CONFIG_XILINX_SDFEC is not set
+# CONFIG_PVPANIC is not set
+# CONFIG_C2PORT is not set
+
+#
+# EEPROM support
+#
+# CONFIG_EEPROM_93CX6 is not set
+# end of EEPROM support
+
+#
+# Texas Instruments shared transport line discipline
+#
+# end of Texas Instruments shared transport line discipline
+
+#
+# Altera FPGA firmware download module (requires I2C)
+#
+
+#
+# Intel MIC & related support
+#
+# CONFIG_VOP_BUS is not set
+# end of Intel MIC & related support
+
+# CONFIG_ECHO is not set
+# end of Misc devices
+
+CONFIG_HAVE_IDE=y
+# CONFIG_IDE is not set
+
+#
+# SCSI device support
+#
+CONFIG_SCSI_MOD=y
+# CONFIG_RAID_ATTRS is not set
+# CONFIG_SCSI is not set
+# end of SCSI device support
+
+# CONFIG_ATA is not set
+# CONFIG_MD is not set
+# CONFIG_TARGET_CORE is not set
+# CONFIG_MACINTOSH_DRIVERS is not set
+# CONFIG_NVM is not set
+
+#
+# Input device support
+#
+# CONFIG_INPUT is not set
+
+#
+# Hardware I/O ports
+#
+# CONFIG_SERIO is not set
+CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y
+# CONFIG_GAMEPORT is not set
+# end of Hardware I/O ports
+# end of Input device support
+
+#
+# Character devices
+#
+CONFIG_TTY=y
+# CONFIG_VT is not set
+CONFIG_UNIX98_PTYS=y
+CONFIG_LEGACY_PTYS=y
+CONFIG_LEGACY_PTY_COUNT=256
+CONFIG_SERIAL_NONSTANDARD=y
+# CONFIG_N_HDLC is not set
+# CONFIG_TRACE_SINK is not set
+# CONFIG_PPC_EPAPR_HV_BYTECHAN is not set
+# CONFIG_NULL_TTY is not set
+CONFIG_LDISC_AUTOLOAD=y
+CONFIG_DEVMEM=y
+# CONFIG_DEVKMEM is not set
+
+#
+# Serial drivers
+#
+# CONFIG_SERIAL_8250 is not set
+
+#
+# Non-8250 serial port support
+#
+# CONFIG_SERIAL_UARTLITE is not set
+# CONFIG_SERIAL_SIFIVE is not set
+# CONFIG_SERIAL_SCCNXP is not set
+# CONFIG_SERIAL_ALTERA_JTAGUART is not set
+# CONFIG_SERIAL_ALTERA_UART is not set
+# CONFIG_SERIAL_XILINX_PS_UART is not set
+# CONFIG_SERIAL_ARC is not set
+# CONFIG_SERIAL_FSL_LPUART is not set
+# CONFIG_SERIAL_FSL_LINFLEXUART is not set
+# CONFIG_SERIAL_CONEXANT_DIGICOLOR is not set
+# end of Serial drivers
+
+# CONFIG_SERIAL_DEV_BUS is not set
+# CONFIG_TTY_PRINTK is not set
+CONFIG_HVC_DRIVER=y
+CONFIG_HVC_UDBG=y
+# CONFIG_IPMI_HANDLER is not set
+# CONFIG_HW_RANDOM is not set
+# CONFIG_NVRAM is not set
+# CONFIG_RAW_DRIVER is not set
+# CONFIG_HANGCHECK_TIMER is not set
+# CONFIG_TCG_TPM is not set
+# CONFIG_XILLYBUS is not set
+# end of Character devices
+
+# CONFIG_RANDOM_TRUST_CPU is not set
+# CONFIG_RANDOM_TRUST_BOOTLOADER is not set
+
+#
+# I2C support
+#
+# CONFIG_I2C is not set
+# end of I2C support
+
+# CONFIG_I3C is not set
+# CONFIG_SPI is not set
+# CONFIG_SPMI is not set
+# CONFIG_HSI is not set
+# CONFIG_PPS is not set
+
+#
+# PTP clock support
+#
+
+#
+# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
+#
+# end of PTP clock support
+
+# CONFIG_PINCTRL is not set
+# CONFIG_GPIOLIB is not set
+# CONFIG_W1 is not set
+# CONFIG_POWER_AVS is not set
+# CONFIG_POWER_RESET is not set
+# CONFIG_POWER_SUPPLY is not set
+# CONFIG_HWMON is not set
+# CONFIG_THERMAL is not set
+# CONFIG_WATCHDOG is not set
+CONFIG_SSB_POSSIBLE=y
+# CONFIG_SSB is not set
+CONFIG_BCMA_POSSIBLE=y
+# CONFIG_BCMA is not set
+
+#
+# Multifunction device drivers
+#
+# CONFIG_MFD_ATMEL_FLEXCOM is not set
+# CONFIG_MFD_ATMEL_HLCDC is not set
+# CONFIG_MFD_MADERA is not set
+# CONFIG_MFD_HI6421_PMIC is not set
+# CONFIG_HTC_PASIC3 is not set
+# CONFIG_MFD_KEMPLD is not set
+# CONFIG_MFD_MT6397 is not set
+# CONFIG_MFD_SM501 is not set
+# CONFIG_ABX500_CORE is not set
+# CONFIG_MFD_SYSCON is not set
+# CONFIG_MFD_TI_AM335X_TSCADC is not set
+# CONFIG_MFD_TQMX86 is not set
+# end of Multifunction device drivers
+
+# CONFIG_REGULATOR is not set
+# CONFIG_MEDIA_SUPPORT is not set
+
+#
+# Graphics support
+#
+# CONFIG_DRM is not set
+
+#
+# ARM devices
+#
+# end of ARM devices
+
+#
+# ACP (Audio CoProcessor) Configuration
+#
+# end of ACP (Audio CoProcessor) Configuration
+
+#
+# Frame buffer Devices
+#
+# CONFIG_FB is not set
+# end of Frame buffer Devices
+
+#
+# Backlight & LCD device support
+#
+# CONFIG_LCD_CLASS_DEVICE is not set
+# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
+# end of Backlight & LCD device support
+# end of Graphics support
+
+# CONFIG_SOUND is not set
+CONFIG_USB_OHCI_LITTLE_ENDIAN=y
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_MMC is not set
+# CONFIG_MEMSTICK is not set
+# CONFIG_NEW_LEDS is not set
+# CONFIG_ACCESSIBILITY is not set
+CONFIG_EDAC_ATOMIC_SCRUB=y
+CONFIG_EDAC_SUPPORT=y
+CONFIG_RTC_LIB=y
+# CONFIG_RTC_CLASS is not set
+# CONFIG_DMADEVICES is not set
+
+#
+# DMABUF options
+#
+# CONFIG_SYNC_FILE is not set
+# CONFIG_DMABUF_HEAPS is not set
+# end of DMABUF options
+
+# CONFIG_AUXDISPLAY is not set
+# CONFIG_UIO is not set
+# CONFIG_VIRT_DRIVERS is not set
+# CONFIG_VIRTIO_MENU is not set
+
+#
+# Microsoft Hyper-V guest support
+#
+# end of Microsoft Hyper-V guest support
+
+# CONFIG_GREYBUS is not set
+# CONFIG_STAGING is not set
+# CONFIG_GOLDFISH is not set
+# CONFIG_HWSPINLOCK is not set
+
+#
+# Clock Source drivers
+#
+# CONFIG_MICROCHIP_PIT64B is not set
+# end of Clock Source drivers
+
+# CONFIG_MAILBOX is not set
+# CONFIG_IOMMU_SUPPORT is not set
+
+#
+# Remoteproc drivers
+#
+# CONFIG_REMOTEPROC is not set
+# end of Remoteproc drivers
+
+#
+# Rpmsg drivers
+#
+# CONFIG_RPMSG_VIRTIO is not set
+# end of Rpmsg drivers
+
+# CONFIG_SOUNDWIRE is not set
+
+#
+# SOC (System On Chip) specific Drivers
+#
+
+#
+# Amlogic SoC drivers
+#
+# end of Amlogic SoC drivers
+
+#
+# Aspeed SoC drivers
+#
+# end of Aspeed SoC drivers
+
+#
+# Broadcom SoC drivers
+#
+# end of Broadcom SoC drivers
+
+#
+# NXP/Freescale QorIQ SoC drivers
+#
+# CONFIG_QUICC_ENGINE is not set
+# end of NXP/Freescale QorIQ SoC drivers
+
+#
+# i.MX SoC drivers
+#
+# end of i.MX SoC drivers
+
+#
+# Qualcomm SoC drivers
+#
+# end of Qualcomm SoC drivers
+
+# CONFIG_SOC_TI is not set
+
+#
+# Xilinx SoC drivers
+#
+# CONFIG_XILINX_VCU is not set
+# end of Xilinx SoC drivers
+# end of SOC (System On Chip) specific Drivers
+
+# CONFIG_PM_DEVFREQ is not set
+# CONFIG_EXTCON is not set
+# CONFIG_MEMORY is not set
+# CONFIG_IIO is not set
+# CONFIG_PWM is not set
+
+#
+# IRQ chip support
+#
+CONFIG_IRQCHIP=y
+# CONFIG_AL_FIC is not set
+# end of IRQ chip support
+
+# CONFIG_IPACK_BUS is not set
+# CONFIG_RESET_CONTROLLER is not set
+
+#
+# PHY Subsystem
+#
+# CONFIG_GENERIC_PHY is not set
+# CONFIG_BCM_KONA_USB2_PHY is not set
+# CONFIG_PHY_CADENCE_DP is not set
+# CONFIG_PHY_CADENCE_DPHY is not set
+# CONFIG_PHY_FSL_IMX8MQ_USB is not set
+# CONFIG_PHY_MIXEL_MIPI_DPHY is not set
+# CONFIG_PHY_PXA_28NM_HSIC is not set
+# CONFIG_PHY_PXA_28NM_USB2 is not set
+# CONFIG_PHY_INTEL_EMMC is not set
+# end of PHY Subsystem
+
+# CONFIG_POWERCAP is not set
+# CONFIG_MCB is not set
+# CONFIG_RAS is not set
+
+#
+# Android
+#
+# CONFIG_ANDROID is not set
+# end of Android
+
+# CONFIG_LIBNVDIMM is not set
+# CONFIG_DAX is not set
+# CONFIG_NVMEM is not set
+
+#
+# HW tracing support
+#
+# CONFIG_STM is not set
+# CONFIG_INTEL_TH is not set
+# end of HW tracing support
+
+# CONFIG_FPGA is not set
+# CONFIG_FSI is not set
+# CONFIG_SIOX is not set
+# CONFIG_SLIMBUS is not set
+# CONFIG_INTERCONNECT is not set
+# CONFIG_COUNTER is not set
+# end of Device Drivers
+
+#
+# File systems
+#
+CONFIG_DCACHE_WORD_ACCESS=y
+# CONFIG_VALIDATE_FS_PARSER is not set
+CONFIG_FS_IOMAP=y
+# CONFIG_EXT2_FS is not set
+# CONFIG_EXT3_FS is not set
+CONFIG_EXT4_FS=y
+CONFIG_EXT4_USE_FOR_EXT2=y
+# CONFIG_EXT4_FS_POSIX_ACL is not set
+# CONFIG_EXT4_FS_SECURITY is not set
+# CONFIG_EXT4_DEBUG is not set
+CONFIG_JBD2=y
+# CONFIG_JBD2_DEBUG is not set
+CONFIG_FS_MBCACHE=y
+# CONFIG_REISERFS_FS is not set
+# CONFIG_JFS_FS is not set
+# CONFIG_XFS_FS is not set
+# CONFIG_GFS2_FS is not set
+# CONFIG_BTRFS_FS is not set
+# CONFIG_NILFS2_FS is not set
+# CONFIG_F2FS_FS is not set
+# CONFIG_FS_DAX is not set
+# CONFIG_EXPORTFS_BLOCK_OPS is not set
+# CONFIG_FILE_LOCKING is not set
+# CONFIG_FS_ENCRYPTION is not set
+# CONFIG_FS_VERITY is not set
+# CONFIG_DNOTIFY is not set
+# CONFIG_INOTIFY_USER is not set
+# CONFIG_FANOTIFY is not set
+# CONFIG_QUOTA is not set
+# CONFIG_AUTOFS4_FS is not set
+# CONFIG_AUTOFS_FS is not set
+# CONFIG_FUSE_FS is not set
+# CONFIG_OVERLAY_FS is not set
+
+#
+# Caches
+#
+# CONFIG_FSCACHE is not set
+# end of Caches
+
+#
+# CD-ROM/DVD Filesystems
+#
+# CONFIG_ISO9660_FS is not set
+# CONFIG_UDF_FS is not set
+# end of CD-ROM/DVD Filesystems
+
+#
+# DOS/FAT/NT Filesystems
+#
+# CONFIG_MSDOS_FS is not set
+# CONFIG_VFAT_FS is not set
+# CONFIG_NTFS_FS is not set
+# end of DOS/FAT/NT Filesystems
+
+#
+# Pseudo filesystems
+#
+CONFIG_PROC_FS=y
+# CONFIG_PROC_KCORE is not set
+CONFIG_PROC_SYSCTL=y
+CONFIG_PROC_PAGE_MONITOR=y
+# CONFIG_PROC_CHILDREN is not set
+CONFIG_KERNFS=y
+CONFIG_SYSFS=y
+# CONFIG_HUGETLBFS is not set
+CONFIG_ARCH_HAS_GIGANTIC_PAGE=y
+# CONFIG_CONFIGFS_FS is not set
+# end of Pseudo filesystems
+
+# CONFIG_MISC_FILESYSTEMS is not set
+# CONFIG_NLS is not set
+# CONFIG_UNICODE is not set
+# end of File systems
+
+#
+# Security options
+#
+# CONFIG_KEYS is not set
+# CONFIG_SECURITY_DMESG_RESTRICT is not set
+# CONFIG_SECURITY is not set
+# CONFIG_SECURITYFS is not set
+CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR=y
+# CONFIG_HARDENED_USERCOPY is not set
+# CONFIG_FORTIFY_SOURCE is not set
+# CONFIG_STATIC_USERMODEHELPER is not set
+CONFIG_DEFAULT_SECURITY_DAC=y
+CONFIG_LSM="lockdown,yama,loadpin,safesetid,integrity"
+
+#
+# Kernel hardening options
+#
+
+#
+# Memory initialization
+#
+CONFIG_INIT_STACK_NONE=y
+# CONFIG_INIT_ON_ALLOC_DEFAULT_ON is not set
+# CONFIG_INIT_ON_FREE_DEFAULT_ON is not set
+# end of Memory initialization
+# end of Kernel hardening options
+# end of Security options
+
+CONFIG_CRYPTO=y
+
+#
+# Crypto core or helper
+#
+CONFIG_CRYPTO_ALGAPI=y
+CONFIG_CRYPTO_ALGAPI2=y
+CONFIG_CRYPTO_HASH=y
+CONFIG_CRYPTO_HASH2=y
+# CONFIG_CRYPTO_MANAGER is not set
+CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
+# CONFIG_CRYPTO_NULL is not set
+# CONFIG_CRYPTO_CRYPTD is not set
+# CONFIG_CRYPTO_AUTHENC is not set
+
+#
+# Public-key cryptography
+#
+# CONFIG_CRYPTO_RSA is not set
+# CONFIG_CRYPTO_DH is not set
+# CONFIG_CRYPTO_ECDH is not set
+# CONFIG_CRYPTO_ECRDSA is not set
+# CONFIG_CRYPTO_CURVE25519 is not set
+
+#
+# Authenticated Encryption with Associated Data
+#
+# CONFIG_CRYPTO_CCM is not set
+# CONFIG_CRYPTO_GCM is not set
+# CONFIG_CRYPTO_CHACHA20POLY1305 is not set
+# CONFIG_CRYPTO_AEGIS128 is not set
+# CONFIG_CRYPTO_SEQIV is not set
+# CONFIG_CRYPTO_ECHAINIV is not set
+
+#
+# Block modes
+#
+# CONFIG_CRYPTO_CBC is not set
+# CONFIG_CRYPTO_CFB is not set
+# CONFIG_CRYPTO_CTR is not set
+# CONFIG_CRYPTO_CTS is not set
+# CONFIG_CRYPTO_ECB is not set
+# CONFIG_CRYPTO_LRW is not set
+# CONFIG_CRYPTO_OFB is not set
+# CONFIG_CRYPTO_PCBC is not set
+# CONFIG_CRYPTO_XTS is not set
+# CONFIG_CRYPTO_KEYWRAP is not set
+# CONFIG_CRYPTO_ADIANTUM is not set
+# CONFIG_CRYPTO_ESSIV is not set
+
+#
+# Hash modes
+#
+# CONFIG_CRYPTO_CMAC is not set
+# CONFIG_CRYPTO_HMAC is not set
+# CONFIG_CRYPTO_XCBC is not set
+# CONFIG_CRYPTO_VMAC is not set
+
+#
+# Digest
+#
+CONFIG_CRYPTO_CRC32C=y
+# CONFIG_CRYPTO_CRC32 is not set
+# CONFIG_CRYPTO_XXHASH is not set
+# CONFIG_CRYPTO_BLAKE2B is not set
+# CONFIG_CRYPTO_BLAKE2S is not set
+# CONFIG_CRYPTO_CRCT10DIF is not set
+# CONFIG_CRYPTO_GHASH is not set
+# CONFIG_CRYPTO_POLY1305 is not set
+# CONFIG_CRYPTO_MD4 is not set
+# CONFIG_CRYPTO_MD5 is not set
+# CONFIG_CRYPTO_MD5_PPC is not set
+# CONFIG_CRYPTO_MICHAEL_MIC is not set
+# CONFIG_CRYPTO_RMD128 is not set
+# CONFIG_CRYPTO_RMD160 is not set
+# CONFIG_CRYPTO_RMD256 is not set
+# CONFIG_CRYPTO_RMD320 is not set
+# CONFIG_CRYPTO_SHA1 is not set
+# CONFIG_CRYPTO_SHA1_PPC is not set
+# CONFIG_CRYPTO_SHA256 is not set
+# CONFIG_CRYPTO_SHA512 is not set
+# CONFIG_CRYPTO_SHA3 is not set
+# CONFIG_CRYPTO_SM3 is not set
+# CONFIG_CRYPTO_STREEBOG is not set
+# CONFIG_CRYPTO_TGR192 is not set
+# CONFIG_CRYPTO_WP512 is not set
+
+#
+# Ciphers
+#
+# CONFIG_CRYPTO_AES is not set
+# CONFIG_CRYPTO_AES_TI is not set
+# CONFIG_CRYPTO_ANUBIS is not set
+# CONFIG_CRYPTO_ARC4 is not set
+# CONFIG_CRYPTO_BLOWFISH is not set
+# CONFIG_CRYPTO_CAMELLIA is not set
+# CONFIG_CRYPTO_CAST5 is not set
+# CONFIG_CRYPTO_CAST6 is not set
+# CONFIG_CRYPTO_DES is not set
+# CONFIG_CRYPTO_FCRYPT is not set
+# CONFIG_CRYPTO_KHAZAD is not set
+# CONFIG_CRYPTO_SALSA20 is not set
+# CONFIG_CRYPTO_CHACHA20 is not set
+# CONFIG_CRYPTO_SEED is not set
+# CONFIG_CRYPTO_SERPENT is not set
+# CONFIG_CRYPTO_SM4 is not set
+# CONFIG_CRYPTO_TEA is not set
+# CONFIG_CRYPTO_TWOFISH is not set
+
+#
+# Compression
+#
+# CONFIG_CRYPTO_DEFLATE is not set
+# CONFIG_CRYPTO_LZO is not set
+# CONFIG_CRYPTO_842 is not set
+# CONFIG_CRYPTO_LZ4 is not set
+# CONFIG_CRYPTO_LZ4HC is not set
+# CONFIG_CRYPTO_ZSTD is not set
+
+#
+# Random Number Generation
+#
+# CONFIG_CRYPTO_ANSI_CPRNG is not set
+# CONFIG_CRYPTO_DRBG_MENU is not set
+# CONFIG_CRYPTO_JITTERENTROPY is not set
+
+#
+# Crypto library routines
+#
+# CONFIG_CRYPTO_LIB_BLAKE2S is not set
+# CONFIG_CRYPTO_LIB_CHACHA is not set
+# CONFIG_CRYPTO_LIB_CURVE25519 is not set
+CONFIG_CRYPTO_LIB_POLY1305_RSIZE=1
+# CONFIG_CRYPTO_LIB_POLY1305 is not set
+# CONFIG_CRYPTO_LIB_CHACHA20POLY1305 is not set
+# CONFIG_CRYPTO_HW is not set
+
+#
+# Certificates for signature checking
+#
+# end of Certificates for signature checking
+
+#
+# Library routines
+#
+# CONFIG_PACKING is not set
+CONFIG_BITREVERSE=y
+CONFIG_GENERIC_STRNCPY_FROM_USER=y
+CONFIG_GENERIC_STRNLEN_USER=y
+# CONFIG_CORDIC is not set
+CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
+CONFIG_ARCH_HAS_FAST_MULTIPLIER=y
+# CONFIG_CRC_CCITT is not set
+CONFIG_CRC16=y
+# CONFIG_CRC_T10DIF is not set
+# CONFIG_CRC_ITU_T is not set
+CONFIG_CRC32=y
+# CONFIG_CRC32_SELFTEST is not set
+CONFIG_CRC32_SLICEBY8=y
+# CONFIG_CRC32_SLICEBY4 is not set
+# CONFIG_CRC32_SARWATE is not set
+# CONFIG_CRC32_BIT is not set
+# CONFIG_CRC64 is not set
+# CONFIG_CRC4 is not set
+# CONFIG_CRC7 is not set
+# CONFIG_LIBCRC32C is not set
+# CONFIG_CRC8 is not set
+# CONFIG_RANDOM32_SELFTEST is not set
+CONFIG_ZLIB_DEFLATE=y
+CONFIG_XZ_DEC=y
+# CONFIG_XZ_DEC_X86 is not set
+CONFIG_XZ_DEC_POWERPC=y
+# CONFIG_XZ_DEC_IA64 is not set
+# CONFIG_XZ_DEC_ARM is not set
+# CONFIG_XZ_DEC_ARMTHUMB is not set
+# CONFIG_XZ_DEC_SPARC is not set
+CONFIG_XZ_DEC_BCJ=y
+# CONFIG_XZ_DEC_TEST is not set
+CONFIG_DECOMPRESS_XZ=y
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT_MAP=y
+CONFIG_HAS_DMA=y
+CONFIG_NEED_SG_DMA_LENGTH=y
+CONFIG_NEED_DMA_MAP_STATE=y
+CONFIG_ARCH_DMA_ADDR_T_64BIT=y
+CONFIG_DMA_DECLARE_COHERENT=y
+# CONFIG_DMA_API_DEBUG is not set
+CONFIG_IOMMU_HELPER=y
+# CONFIG_IRQ_POLL is not set
+CONFIG_LIBFDT=y
+CONFIG_ARCH_HAS_PMEM_API=y
+CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE=y
+CONFIG_ARCH_HAS_UACCESS_MCSAFE=y
+CONFIG_SBITMAP=y
+# CONFIG_STRING_SELFTEST is not set
+# end of Library routines
+
+#
+# Kernel hacking
+#
+
+#
+# printk and dmesg options
+#
+# CONFIG_PRINTK_TIME is not set
+# CONFIG_PRINTK_CALLER is not set
+CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
+CONFIG_CONSOLE_LOGLEVEL_QUIET=4
+CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
+# CONFIG_SYMBOLIC_ERRNAME is not set
+# CONFIG_DEBUG_BUGVERBOSE is not set
+# end of printk and dmesg options
+
+#
+# Compile-time checks and compiler options
+#
+# CONFIG_DEBUG_INFO is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_FRAME_WARN=2048
+# CONFIG_STRIP_ASM_SYMS is not set
+# CONFIG_READABLE_ASM is not set
+# CONFIG_HEADERS_INSTALL is not set
+CONFIG_OPTIMIZE_INLINING=y
+# CONFIG_DEBUG_SECTION_MISMATCH is not set
+CONFIG_SECTION_MISMATCH_WARN_ONLY=y
+# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
+# end of Compile-time checks and compiler options
+
+#
+# Generic Kernel Debugging Instruments
+#
+# CONFIG_MAGIC_SYSRQ is not set
+# CONFIG_DEBUG_FS is not set
+CONFIG_HAVE_ARCH_KGDB=y
+# CONFIG_KGDB is not set
+CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
+# CONFIG_UBSAN is not set
+CONFIG_UBSAN_ALIGNMENT=y
+# end of Generic Kernel Debugging Instruments
+
+CONFIG_DEBUG_KERNEL=y
+# CONFIG_DEBUG_MISC is not set
+
+#
+# Memory Debugging
+#
+# CONFIG_PAGE_EXTENSION is not set
+# CONFIG_DEBUG_PAGEALLOC is not set
+# CONFIG_PAGE_OWNER is not set
+# CONFIG_PAGE_POISONING is not set
+# CONFIG_DEBUG_OBJECTS is not set
+# CONFIG_SLUB_STATS is not set
+CONFIG_HAVE_DEBUG_KMEMLEAK=y
+# CONFIG_DEBUG_KMEMLEAK is not set
+# CONFIG_DEBUG_STACK_USAGE is not set
+# CONFIG_SCHED_STACK_END_CHECK is not set
+# CONFIG_DEBUG_VM is not set
+CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
+# CONFIG_DEBUG_VIRTUAL is not set
+# CONFIG_DEBUG_MEMORY_INIT is not set
+CONFIG_HAVE_DEBUG_STACKOVERFLOW=y
+# CONFIG_DEBUG_STACKOVERFLOW is not set
+CONFIG_CC_HAS_KASAN_GENERIC=y
+CONFIG_KASAN_STACK=1
+# end of Memory Debugging
+
+# CONFIG_DEBUG_SHIRQ is not set
+
+#
+# Debug Oops, Lockups and Hangs
+#
+# CONFIG_PANIC_ON_OOPS is not set
+CONFIG_PANIC_ON_OOPS_VALUE=0
+# CONFIG_SOFTLOCKUP_DETECTOR is not set
+# CONFIG_HARDLOCKUP_DETECTOR is not set
+# CONFIG_DETECT_HUNG_TASK is not set
+# CONFIG_WQ_WATCHDOG is not set
+# end of Debug Oops, Lockups and Hangs
+
+#
+# Scheduler Debugging
+#
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_SCHEDSTATS is not set
+# end of Scheduler Debugging
+
+# CONFIG_DEBUG_TIMEKEEPING is not set
+
+#
+# Lock Debugging (spinlocks, mutexes, etc...)
+#
+CONFIG_LOCK_DEBUGGING_SUPPORT=y
+# CONFIG_PROVE_LOCKING is not set
+# CONFIG_LOCK_STAT is not set
+# CONFIG_DEBUG_RT_MUTEXES is not set
+# CONFIG_DEBUG_SPINLOCK is not set
+# CONFIG_DEBUG_MUTEXES is not set
+# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
+# CONFIG_DEBUG_RWSEMS is not set
+# CONFIG_DEBUG_LOCK_ALLOC is not set
+# CONFIG_DEBUG_ATOMIC_SLEEP is not set
+# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
+# CONFIG_LOCK_TORTURE_TEST is not set
+# CONFIG_WW_MUTEX_SELFTEST is not set
+# end of Lock Debugging (spinlocks, mutexes, etc...)
+
+# CONFIG_STACKTRACE is not set
+# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
+# CONFIG_DEBUG_KOBJECT is not set
+
+#
+# Debug kernel data structures
+#
+# CONFIG_DEBUG_LIST is not set
+# CONFIG_DEBUG_PLIST is not set
+# CONFIG_DEBUG_SG is not set
+# CONFIG_DEBUG_NOTIFIERS is not set
+# CONFIG_BUG_ON_DATA_CORRUPTION is not set
+# end of Debug kernel data structures
+
+# CONFIG_DEBUG_CREDENTIALS is not set
+
+#
+# RCU Debugging
+#
+# CONFIG_RCU_PERF_TEST is not set
+# CONFIG_RCU_TORTURE_TEST is not set
+# CONFIG_RCU_TRACE is not set
+# CONFIG_RCU_EQS_DEBUG is not set
+# end of RCU Debugging
+
+# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
+# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
+# CONFIG_LATENCYTOP is not set
+CONFIG_HAVE_FUNCTION_TRACER=y
+CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
+CONFIG_HAVE_DYNAMIC_FTRACE=y
+CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y
+CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
+CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
+CONFIG_HAVE_C_RECORDMCOUNT=y
+CONFIG_TRACING_SUPPORT=y
+# CONFIG_FTRACE is not set
+# CONFIG_SAMPLES is not set
+CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
+# CONFIG_STRICT_DEVMEM is not set
+
+#
+# powerpc Debugging
+#
+CONFIG_PPC_DISABLE_WERROR=y
+CONFIG_PRINT_STACK_DEPTH=64
+# CONFIG_CODE_PATCHING_SELFTEST is not set
+# CONFIG_FTR_FIXUP_SELFTEST is not set
+# CONFIG_MSI_BITMAP_SELFTEST is not set
+# CONFIG_PPC_IRQ_SOFT_MASK_DEBUG is not set
+CONFIG_XMON=y
+CONFIG_XMON_DEFAULT=y
+CONFIG_XMON_DISASSEMBLY=y
+# CONFIG_XMON_DEFAULT_RO_MODE is not set
+CONFIG_DEBUGGER=y
+# CONFIG_BOOTX_TEXT is not set
+CONFIG_PPC_EARLY_DEBUG=y
+# CONFIG_PPC_EARLY_DEBUG_MEMCONS is not set
+CONFIG_PPC_EARLY_DEBUG_MICROWATT=y
+# CONFIG_PPC_FAST_ENDIAN_SWITCH is not set
+# end of powerpc Debugging
+
+#
+# Kernel Testing and Coverage
+#
+# CONFIG_KUNIT is not set
+# CONFIG_NOTIFIER_ERROR_INJECTION is not set
+# CONFIG_FAULT_INJECTION is not set
+CONFIG_ARCH_HAS_KCOV=y
+CONFIG_CC_HAS_SANCOV_TRACE_PC=y
+# CONFIG_KCOV is not set
+# CONFIG_RUNTIME_TESTING_MENU is not set
+# CONFIG_MEMTEST is not set
+# end of Kernel Testing and Coverage
+# end of Kernel hacking
diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index 1f8025383caa..5b701acc6afa 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -20,6 +20,7 @@ source "arch/powerpc/platforms/embedded6xx/Kconfig"
 source "arch/powerpc/platforms/44x/Kconfig"
 source "arch/powerpc/platforms/40x/Kconfig"
 source "arch/powerpc/platforms/amigaone/Kconfig"
+source "arch/powerpc/platforms/microwatt/Kconfig"
 
 config KVM_GUEST
 	bool "KVM Guest support"
diff --git a/arch/powerpc/platforms/Makefile b/arch/powerpc/platforms/Makefile
index 143d4417f6cc..edcb54cdb1a8 100644
--- a/arch/powerpc/platforms/Makefile
+++ b/arch/powerpc/platforms/Makefile
@@ -22,3 +22,4 @@ obj-$(CONFIG_PPC_CELL)		+= cell/
 obj-$(CONFIG_PPC_PS3)		+= ps3/
 obj-$(CONFIG_EMBEDDED6xx)	+= embedded6xx/
 obj-$(CONFIG_AMIGAONE)		+= amigaone/
+obj-$(CONFIG_PPC_MICROWATT)	+= microwatt/
diff --git a/arch/powerpc/platforms/microwatt/Kconfig b/arch/powerpc/platforms/microwatt/Kconfig
new file mode 100644
index 000000000000..981f722ae9ce
--- /dev/null
+++ b/arch/powerpc/platforms/microwatt/Kconfig
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+config PPC_MICROWATT
+	depends on PPC64 && PPC_BOOK3S
+	bool "Microwatt SoC platform"
+	select PPC_XICS
+	select PPC_NATIVE
+	help
+          This option enables support for FPGA-based Microwatt implementations.
+
diff --git a/arch/powerpc/platforms/microwatt/Makefile b/arch/powerpc/platforms/microwatt/Makefile
new file mode 100644
index 000000000000..e6885b3b2ee7
--- /dev/null
+++ b/arch/powerpc/platforms/microwatt/Makefile
@@ -0,0 +1 @@
+obj-y	+= setup.o
diff --git a/arch/powerpc/platforms/microwatt/setup.c b/arch/powerpc/platforms/microwatt/setup.c
new file mode 100644
index 000000000000..3cfc5955a6fe
--- /dev/null
+++ b/arch/powerpc/platforms/microwatt/setup.c
@@ -0,0 +1,40 @@
+/*
+ * Microwatt FPGA-based SoC platform setup code.
+ *
+ * Copyright 2020 Paul Mackerras (paulus@ozlabs.org), IBM Corp.
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/stddef.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <asm/machdep.h>
+#include <asm/time.h>
+
+static void __init microwatt_calibrate_decr(void)
+{
+	ppc_tb_freq = 100000000;
+	ppc_proc_freq = 100000000;
+}
+
+static void __init microwatt_setup_arch(void)
+{
+}
+
+static void __init microwatt_init_IRQ(void)
+{
+}
+
+static int __init microwatt_probe(void)
+{
+	return of_machine_is_compatible("microwatt-soc");
+}
+
+define_machine(microwatt) {
+	.name			= "microwatt",
+	.probe			= microwatt_probe,
+	.setup_arch		= microwatt_setup_arch,
+	.init_IRQ		= microwatt_init_IRQ,
+	.calibrate_decr		= microwatt_calibrate_decr,
+};
-- 
2.25.3

Re: [PATCH RFC 2/4] powerpc: Add Microwatt platform

[Nicholas Piggin]

Excerpts from Paul Mackerras's message of May 9, 2020 3:02 pm:
> Microwatt is a FPGA-based implementation of the Power ISA.  It
> currently only implements little-endian 64-bit mode, and does
> not (yet) support SMP.
> 
> This adds a new machine type to support FPGA-based SoCs with a
> Microwatt core.

Very cool!

Would there be any point sharing this with the "naked metal" platform 
Alistair has for booting POWER in L3 without OPAL? Or is it easy enough 
to have a several different simple 64s platforms?

I have an HPT conditional compile patch and a few other diet Kconfig
things I'll now be better justified to try get merged :)

Thanks,
Nick

Re: [PATCH RFC 2/4] powerpc: Add Microwatt platform

[Alistair Popple]

On Saturday, 9 May 2020 5:58:57 PM AEST Nicholas Piggin wrote:
> Excerpts from Paul Mackerras's message of May 9, 2020 3:02 pm:
> > Microwatt is a FPGA-based implementation of the Power ISA.  It
> > currently only implements little-endian 64-bit mode, and does
> > not (yet) support SMP.
> > 
> > This adds a new machine type to support FPGA-based SoCs with a
> > Microwatt core.
> 
> Very cool!
> 
> Would there be any point sharing this with the "naked metal" platform
> Alistair has for booting POWER in L3 without OPAL? Or is it easy enough
> to have a several different simple 64s platforms?

It looks pretty similar at the moment, I've been meaning to clean those 
patches up and send them upstream but Paul has beaten me to it. The main 
difference so far is how the console is setup. For booting cache contained I 
was using a device tree pointing at a standard UART driver and enabling the 
standard OF platform device tree probing.

- Alistair

> I have an HPT conditional compile patch and a few other diet Kconfig
> things I'll now be better justified to try get merged :)
> 
> Thanks,
> Nick

Re: [PATCH RFC 2/4] powerpc: Add Microwatt platform

[Nicholas Piggin]

Excerpts from Alistair Popple's message of May 9, 2020 6:36 pm:
> On Saturday, 9 May 2020 5:58:57 PM AEST Nicholas Piggin wrote:
>> Excerpts from Paul Mackerras's message of May 9, 2020 3:02 pm:
>> > Microwatt is a FPGA-based implementation of the Power ISA.  It
>> > currently only implements little-endian 64-bit mode, and does
>> > not (yet) support SMP.
>> > 
>> > This adds a new machine type to support FPGA-based SoCs with a
>> > Microwatt core.
>> 
>> Very cool!
>> 
>> Would there be any point sharing this with the "naked metal" platform
>> Alistair has for booting POWER in L3 without OPAL? Or is it easy enough
>> to have a several different simple 64s platforms?
> 
> It looks pretty similar at the moment, I've been meaning to clean those 
> patches up and send them upstream but Paul has beaten me to it. The main 
> difference so far is how the console is setup. For booting cache contained I 
> was using a device tree pointing at a standard UART driver and enabling the 
> standard OF platform device tree probing.

Well I'd only merge them if you think it makes sense. If the platform is 
a perfectly good abstraction for the differences and merging them would 
just result in painful special cases it wouldn't be worthwhile. It's
clearly not a lot of code.

Thanks,
Nick

Re: [PATCH RFC 2/4] powerpc: Add Microwatt platform

[Michael Ellerman]

Paul Mackerras <paulus@ozlabs.org> writes:
> Microwatt is a FPGA-based implementation of the Power ISA.  It
> currently only implements little-endian 64-bit mode, and does
> not (yet) support SMP.

... or FP or VSX or Altivec?

What about transactional memory?

> This adds a new machine type to support FPGA-based SoCs with a
> Microwatt core.
>
> Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
> ---
>  arch/powerpc/Kconfig                      |    2 +-
>  arch/powerpc/configs/microwatt_defconfig  | 1418 +++++++++++++++++++++
>  arch/powerpc/platforms/Kconfig            |    1 +
>  arch/powerpc/platforms/Makefile           |    1 +
>  arch/powerpc/platforms/microwatt/Kconfig  |    9 +
>  arch/powerpc/platforms/microwatt/Makefile |    1 +
>  arch/powerpc/platforms/microwatt/setup.c  |   40 +
>  7 files changed, 1471 insertions(+), 1 deletion(-)
>  create mode 100644 arch/powerpc/configs/microwatt_defconfig
>  create mode 100644 arch/powerpc/platforms/microwatt/Kconfig
>  create mode 100644 arch/powerpc/platforms/microwatt/Makefile
>  create mode 100644 arch/powerpc/platforms/microwatt/setup.c
>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 497b7d0b2d7e..97286b8312f5 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -407,7 +407,7 @@ config HUGETLB_PAGE_SIZE_VARIABLE
>  
>  config MATH_EMULATION
>  	bool "Math emulation"
> -	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE
> +	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
>  	help
>  	  Some PowerPC chips designed for embedded applications do not have
>  	  a floating-point unit and therefore do not implement the
> diff --git a/arch/powerpc/configs/microwatt_defconfig b/arch/powerpc/configs/microwatt_defconfig
> new file mode 100644
> index 000000000000..f4f4c965a786
> --- /dev/null
> +++ b/arch/powerpc/configs/microwatt_defconfig
> @@ -0,0 +1,1418 @@
> +#
> +# Automatically generated file; DO NOT EDIT.
> +# Linux/powerpc 5.6.0 Kernel Configuration
> +#
> +
> +#
> +# Compiler: powerpc64le-linux-gnu-gcc (GCC) 9.2.1 20190827 (Red Hat Cross 9.2.1-1)
> +#
> +CONFIG_CC_IS_GCC=y
> +CONFIG_GCC_VERSION=90201
> +CONFIG_CLANG_VERSION=0
> +CONFIG_CC_HAS_ASM_GOTO=y
> +CONFIG_CC_HAS_ASM_INLINE=y
> +CONFIG_CC_HAS_WARN_MAYBE_UNINITIALIZED=y
> +CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED=y
> +CONFIG_IRQ_WORK=y
> +CONFIG_BUILDTIME_TABLE_SORT=y
> +CONFIG_THREAD_INFO_IN_TASK=y

This should be a minimised config generated with savedefconfig.

> diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
> index 1f8025383caa..5b701acc6afa 100644
> --- a/arch/powerpc/platforms/Kconfig
> +++ b/arch/powerpc/platforms/Kconfig
> @@ -20,6 +20,7 @@ source "arch/powerpc/platforms/embedded6xx/Kconfig"
>  source "arch/powerpc/platforms/44x/Kconfig"
>  source "arch/powerpc/platforms/40x/Kconfig"
>  source "arch/powerpc/platforms/amigaone/Kconfig"
> +source "arch/powerpc/platforms/microwatt/Kconfig"
>  
>  config KVM_GUEST
>  	bool "KVM Guest support"
> diff --git a/arch/powerpc/platforms/Makefile b/arch/powerpc/platforms/Makefile
> index 143d4417f6cc..edcb54cdb1a8 100644
> --- a/arch/powerpc/platforms/Makefile
> +++ b/arch/powerpc/platforms/Makefile
> @@ -22,3 +22,4 @@ obj-$(CONFIG_PPC_CELL)		+= cell/
>  obj-$(CONFIG_PPC_PS3)		+= ps3/
>  obj-$(CONFIG_EMBEDDED6xx)	+= embedded6xx/
>  obj-$(CONFIG_AMIGAONE)		+= amigaone/
> +obj-$(CONFIG_PPC_MICROWATT)	+= microwatt/
> diff --git a/arch/powerpc/platforms/microwatt/Kconfig b/arch/powerpc/platforms/microwatt/Kconfig
> new file mode 100644
> index 000000000000..981f722ae9ce
> --- /dev/null
> +++ b/arch/powerpc/platforms/microwatt/Kconfig
> @@ -0,0 +1,9 @@
> +# SPDX-License-Identifier: GPL-2.0
> +config PPC_MICROWATT
> +	depends on PPC64 && PPC_BOOK3S

That can just be PPC_BOOK3S_64

I think it should also depend on !CPU_BIG_ENDIAN && !SMP ?

Should it also select MATH_EMULATION?
And MATH_EMULATION_FULL ?

> +	bool "Microwatt SoC platform"
> +	select PPC_XICS
> +	select PPC_NATIVE
> +	help
> +          This option enables support for FPGA-based Microwatt implementations.
> +
> diff --git a/arch/powerpc/platforms/microwatt/Makefile b/arch/powerpc/platforms/microwatt/Makefile
> new file mode 100644
> index 000000000000..e6885b3b2ee7
> --- /dev/null
> +++ b/arch/powerpc/platforms/microwatt/Makefile
> @@ -0,0 +1 @@
> +obj-y	+= setup.o
> diff --git a/arch/powerpc/platforms/microwatt/setup.c b/arch/powerpc/platforms/microwatt/setup.c
> new file mode 100644
> index 000000000000..3cfc5955a6fe
> --- /dev/null
> +++ b/arch/powerpc/platforms/microwatt/setup.c
> @@ -0,0 +1,40 @@
> +/*
> + * Microwatt FPGA-based SoC platform setup code.
> + *
> + * Copyright 2020 Paul Mackerras (paulus@ozlabs.org), IBM Corp.
> + */
> +
> +#include <linux/types.h>
> +#include <linux/kernel.h>
> +#include <linux/stddef.h>
> +#include <linux/init.h>
> +#include <linux/of.h>
> +#include <asm/machdep.h>
> +#include <asm/time.h>
> +
> +static void __init microwatt_calibrate_decr(void)
> +{
> +	ppc_tb_freq = 100000000;
> +	ppc_proc_freq = 100000000;
> +}

Why can't those come via the device tree?

> +
> +static void __init microwatt_setup_arch(void)
> +{
> +}

That can be NULL in ppc_md.

> +static void __init microwatt_init_IRQ(void)
> +{
> +}

Can be NULL in ppc_md.

> +static int __init microwatt_probe(void)
> +{
> +	return of_machine_is_compatible("microwatt-soc");
> +}
> +
> +define_machine(microwatt) {
> +	.name			= "microwatt",
> +	.probe			= microwatt_probe,
> +	.setup_arch		= microwatt_setup_arch,
> +	.init_IRQ		= microwatt_init_IRQ,
> +	.calibrate_decr		= microwatt_calibrate_decr,
> +};
> -- 
> 2.25.3

cheers

[PATCH RFC 3/4] powerpc/microwatt: Add early debug UART support for Microwatt

[Paul Mackerras]

Currently microwatt-based SoCs come with a "potato" UART.  This
adds udbg support for the potato UART, giving us both an early
debug console, and a runtime console using the hvc-udbg support.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
---
 arch/powerpc/Kconfig.debug               |   6 ++
 arch/powerpc/include/asm/udbg.h          |   1 +
 arch/powerpc/kernel/udbg.c               |   2 +
 arch/powerpc/platforms/microwatt/setup.c | 108 +++++++++++++++++++++++
 4 files changed, 117 insertions(+)

diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index 0b063830eea8..399abc6d2af7 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -277,6 +277,12 @@ config PPC_EARLY_DEBUG_MEMCONS
 	  This console provides input and output buffers stored within the
 	  kernel BSS and should be safe to select on any system. A debugger
 	  can then be used to read kernel output or send input to the console.
+
+config PPC_EARLY_DEBUG_MICROWATT
+       bool "Microwatt potato UART"
+       help
+         Select this to enable early debugging using the potato UART
+	 included in the Microwatt SOC.
 endchoice
 
 config PPC_MEMCONS_OUTPUT_SIZE
diff --git a/arch/powerpc/include/asm/udbg.h b/arch/powerpc/include/asm/udbg.h
index 0ea9e70ed78b..2dbd2d3b0591 100644
--- a/arch/powerpc/include/asm/udbg.h
+++ b/arch/powerpc/include/asm/udbg.h
@@ -53,6 +53,7 @@ extern void __init udbg_init_ehv_bc(void);
 extern void __init udbg_init_ps3gelic(void);
 extern void __init udbg_init_debug_opal_raw(void);
 extern void __init udbg_init_debug_opal_hvsi(void);
+extern void __init udbg_init_debug_microwatt(void);
 
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_UDBG_H */
diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index 01595e8cafe7..e614993021c6 100644
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -67,6 +67,8 @@ void __init udbg_early_init(void)
 	udbg_init_debug_opal_raw();
 #elif defined(CONFIG_PPC_EARLY_DEBUG_OPAL_HVSI)
 	udbg_init_debug_opal_hvsi();
+#elif defined(CONFIG_PPC_EARLY_DEBUG_MICROWATT)
+	udbg_init_debug_microwatt();
 #endif
 
 #ifdef CONFIG_PPC_EARLY_DEBUG
diff --git a/arch/powerpc/platforms/microwatt/setup.c b/arch/powerpc/platforms/microwatt/setup.c
index 3cfc5955a6fe..a5145adeaae7 100644
--- a/arch/powerpc/platforms/microwatt/setup.c
+++ b/arch/powerpc/platforms/microwatt/setup.c
@@ -10,8 +10,115 @@
 #include <linux/init.h>
 #include <linux/of.h>
 #include <asm/machdep.h>
+#include <asm/udbg.h>
+#include <asm/reg.h>
 #include <asm/time.h>
 
+static u64 potato_uart_base;
+
+#define PROC_FREQ 100000000
+#define UART_FREQ 115200
+#define UART_BASE 0xc0002000
+
+#define POTATO_CONSOLE_TX		0x00
+#define POTATO_CONSOLE_RX		0x08
+#define POTATO_CONSOLE_STATUS		0x10
+#define   POTATO_CONSOLE_STATUS_RX_EMPTY		0x01
+#define   POTATO_CONSOLE_STATUS_TX_EMPTY		0x02
+#define   POTATO_CONSOLE_STATUS_RX_FULL			0x04
+#define   POTATO_CONSOLE_STATUS_TX_FULL			0x08
+#define POTATO_CONSOLE_CLOCK_DIV	0x18
+#define POTATO_CONSOLE_IRQ_EN		0x20
+
+static u64 potato_uart_reg_read(int offset)
+{
+	u64 val, msr;
+
+	msr = mfmsr();
+	__asm__ volatile("mtmsrd %3,0; ldcix %0,%1,%2; mtmsrd %4,0"
+			 : "=r" (val) : "b" (potato_uart_base), "r" (offset),
+			   "r" (msr & ~MSR_DR), "r" (msr));
+
+	return val;
+}
+
+static void potato_uart_reg_write(int offset, u64 val)
+{
+	u64 msr;
+
+	msr = mfmsr();
+	__asm__ volatile("mtmsrd %3,0; stdcix %0,%1,%2; mtmsrd %4,0"
+			 : : "r" (val), "b" (potato_uart_base), "r" (offset),
+			   "r" (msr & ~MSR_DR), "r" (msr));
+}
+
+static int potato_uart_rx_empty(void)
+{
+	u64 val;
+
+	val = potato_uart_reg_read(POTATO_CONSOLE_STATUS);
+
+	if (val & POTATO_CONSOLE_STATUS_RX_EMPTY)
+		return 1;
+
+	return 0;
+}
+
+static int potato_uart_tx_full(void)
+{
+	u64 val;
+
+	val = potato_uart_reg_read(POTATO_CONSOLE_STATUS);
+
+	if (val & POTATO_CONSOLE_STATUS_TX_FULL)
+		return 1;
+
+	return 0;
+}
+
+static int potato_uart_read(void)
+{
+	while (potato_uart_rx_empty())
+		;
+	return potato_uart_reg_read(POTATO_CONSOLE_RX);
+}
+
+static int potato_uart_read_poll(void)
+{
+	if (potato_uart_rx_empty())
+		return -1;
+	return potato_uart_reg_read(POTATO_CONSOLE_RX);
+}
+
+static void potato_uart_write(char c)
+{
+	if (c == '\n')
+		potato_uart_write('\r');
+	while (potato_uart_tx_full())
+		;
+	potato_uart_reg_write(POTATO_CONSOLE_TX, c);
+}
+
+static unsigned long potato_uart_divisor(unsigned long proc_freq, unsigned long uart_freq)
+{
+	return proc_freq / (uart_freq * 16) - 1;
+}
+
+void potato_uart_init(void)
+{
+	potato_uart_base = UART_BASE;
+
+	potato_uart_reg_write(POTATO_CONSOLE_CLOCK_DIV, potato_uart_divisor(PROC_FREQ, UART_FREQ));
+}
+
+void udbg_init_debug_microwatt(void)
+{
+	potato_uart_init();
+	udbg_putc = potato_uart_write;
+	udbg_getc = potato_uart_read;
+	udbg_getc_poll = potato_uart_read_poll;
+}
+
 static void __init microwatt_calibrate_decr(void)
 {
 	ppc_tb_freq = 100000000;
@@ -36,5 +143,6 @@ define_machine(microwatt) {
 	.probe			= microwatt_probe,
 	.setup_arch		= microwatt_setup_arch,
 	.init_IRQ		= microwatt_init_IRQ,
+	.progress		= udbg_progress,
 	.calibrate_decr		= microwatt_calibrate_decr,
 };
-- 
2.25.3

Re: [PATCH RFC 3/4] powerpc/microwatt: Add early debug UART support for Microwatt

[Segher Boessenkool]

Hi!

On Sat, May 09, 2020 at 03:03:40PM +1000, Paul Mackerras wrote:
> +	__asm__ volatile("mtmsrd %3,0; ldcix %0,%1,%2; mtmsrd %4,0"
> +			 : "=r" (val) : "b" (potato_uart_base), "r" (offset),
> +			   "r" (msr & ~MSR_DR), "r" (msr));

That should be  "=&r"(val)  (an earlyclobber), because when %0 is
written, %4 will still be used later.

Looks fine otherwise.

Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>


Segher

Re: [PATCH RFC 3/4] powerpc/microwatt: Add early debug UART support for Microwatt

[Michael Ellerman]

Paul Mackerras <paulus@ozlabs.org> writes:
> Currently microwatt-based SoCs come with a "potato" UART.  This
> adds udbg support for the potato UART, giving us both an early
> debug console, and a runtime console using the hvc-udbg support.

Can y'all get a real UART?

There's more code here than in the platform itself.

cheers

[PATCH RFC 4/4] powerpc/radix: Add support for microwatt's PRTBL SPR

[Paul Mackerras]

Microwatt currently doesn't implement hypervisor mode and therefore
doesn't implement the partition table.  It does implement the process
table and radix page table walks.

This adds code to write the base address of the process table to the
PRTBL SPR, which has been assigned SPR 720 for now, as that is in the
range of SPR numbers assigned for experimental use.  PRTBL is only
written when we have neither the FW_FEATURE_LPAR feature nor the
CPU_FTR_HVMODE feature.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
---
 arch/powerpc/include/asm/reg.h           |  1 +
 arch/powerpc/mm/book3s64/radix_pgtable.c | 13 +++++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 1aa46dff0957..6ea3fc42740d 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -721,6 +721,7 @@
 #endif
 #define SPRN_TIR	0x1BE	/* Thread Identification Register */
 #define SPRN_PTCR	0x1D0	/* Partition table control Register */
+#define SPRN_PRTBL	0x2D0	/* Process table pointer */
 #define SPRN_PSPB	0x09F	/* Problem State Priority Boost reg */
 #define SPRN_PTEHI	0x3D5	/* 981 7450 PTE HI word (S/W TLB load) */
 #define SPRN_PTELO	0x3D6	/* 982 7450 PTE LO word (S/W TLB load) */
diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
index dd1bea45325c..2e6a376c9d82 100644
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c
+++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -600,10 +600,15 @@ void __init radix__early_init_mmu(void)
 	radix_init_pgtable();
 
 	if (!firmware_has_feature(FW_FEATURE_LPAR)) {
-		lpcr = mfspr(SPRN_LPCR);
-		mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
-		radix_init_partition_table();
-		radix_init_amor();
+		if (cpu_has_feature(CPU_FTR_HVMODE)) {
+			lpcr = mfspr(SPRN_LPCR);
+			mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
+			radix_init_partition_table();
+			radix_init_amor();
+		} else {
+			mtspr(SPRN_PRTBL, (__pa(process_tb) |
+					   (PRTB_SIZE_SHIFT - 12)));
+		}
 	} else {
 		radix_init_pseries();
 	}
-- 
2.25.3

Re: [PATCH RFC 4/4] powerpc/radix: Add support for microwatt's PRTBL SPR

[Nicholas Piggin]

Excerpts from Paul Mackerras's message of May 9, 2020 3:04 pm:
> Microwatt currently doesn't implement hypervisor mode and therefore
> doesn't implement the partition table.  It does implement the process
> table and radix page table walks.
> 
> This adds code to write the base address of the process table to the
> PRTBL SPR, which has been assigned SPR 720 for now, as that is in the
> range of SPR numbers assigned for experimental use.  PRTBL is only
> written when we have neither the FW_FEATURE_LPAR feature nor the
> CPU_FTR_HVMODE feature.

What do you think about adding a FW_FEATURE and/or CPU_FTR for
microwatt?

No big deal now, but I'm sure you'll be adding other things.

Thanks,
Nick

> 
> Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
> ---
>  arch/powerpc/include/asm/reg.h           |  1 +
>  arch/powerpc/mm/book3s64/radix_pgtable.c | 13 +++++++++----
>  2 files changed, 10 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
> index 1aa46dff0957..6ea3fc42740d 100644
> --- a/arch/powerpc/include/asm/reg.h
> +++ b/arch/powerpc/include/asm/reg.h
> @@ -721,6 +721,7 @@
>  #endif
>  #define SPRN_TIR	0x1BE	/* Thread Identification Register */
>  #define SPRN_PTCR	0x1D0	/* Partition table control Register */
> +#define SPRN_PRTBL	0x2D0	/* Process table pointer */
>  #define SPRN_PSPB	0x09F	/* Problem State Priority Boost reg */
>  #define SPRN_PTEHI	0x3D5	/* 981 7450 PTE HI word (S/W TLB load) */
>  #define SPRN_PTELO	0x3D6	/* 982 7450 PTE LO word (S/W TLB load) */
> diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
> index dd1bea45325c..2e6a376c9d82 100644
> --- a/arch/powerpc/mm/book3s64/radix_pgtable.c
> +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
> @@ -600,10 +600,15 @@ void __init radix__early_init_mmu(void)
>  	radix_init_pgtable();
>  
>  	if (!firmware_has_feature(FW_FEATURE_LPAR)) {
> -		lpcr = mfspr(SPRN_LPCR);
> -		mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
> -		radix_init_partition_table();
> -		radix_init_amor();
> +		if (cpu_has_feature(CPU_FTR_HVMODE)) {
> +			lpcr = mfspr(SPRN_LPCR);
> +			mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
> +			radix_init_partition_table();
> +			radix_init_amor();
> +		} else {
> +			mtspr(SPRN_PRTBL, (__pa(process_tb) |
> +					   (PRTB_SIZE_SHIFT - 12)));
> +		}
>  	} else {
>  		radix_init_pseries();
>  	}
> -- 
> 2.25.3
> 
>