[v1] LoongArch: Update the flush cache policy

[PATCH] LoongArch: Update the flush cache policy

Posted by Li Jun 1 year, 7 months ago

fix when LoongArch s3 resume, Can't find image information

Signed-off-by: Li Jun <lijun01@kylinos.cn>
Signed-off-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Biao Dong <dongbiao@loongson.cn>
---
 arch/loongarch/mm/cache.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/arch/loongarch/mm/cache.c b/arch/loongarch/mm/cache.c
index 6be04d36ca07..52872fa0e5d8 100644
--- a/arch/loongarch/mm/cache.c
+++ b/arch/loongarch/mm/cache.c
@@ -63,6 +63,28 @@ static void flush_cache_leaf(unsigned int leaf)
 	} while (--nr_nodes > 0);
 }
 
+static void flush_cache_last_level(unsigned int leaf)
+{
+	u64 addr;
+	int i, j, nr_nodes, way_size;
+	struct cache_desc *cdesc = current_cpu_data.cache_leaves + leaf;
+
+	nr_nodes = loongson_sysconf.nr_nodes;
+
+	addr = CSR_DMW1_BASE;
+	iocsr_write32(0x1, 0x280);
+	way_size = cdesc->sets * cdesc->linesz;
+	do {
+		for (i = 0; i < (cdesc->ways * 3); i++) {
+			for (j = 0; j < (cdesc->sets); j++) {
+				*(volatile u32 *)addr;
+				addr += cdesc->linesz;
+			}
+		}
+		addr += 0x100000000000;
+	} while (--nr_nodes > 0);
+}
+
 asmlinkage __visible void __flush_cache_all(void)
 {
 	int leaf;
@@ -71,7 +93,7 @@ asmlinkage __visible void __flush_cache_all(void)
 
 	leaf = cache_present - 1;
 	if (cache_inclusive(cdesc + leaf)) {
-		flush_cache_leaf(leaf);
+		flush_cache_last_level(leaf);
 		return;
 	}
 
-- 
2.34.1

Re: [PATCH] LoongArch: Update the flush cache policy

Posted by kernel test robot 1 year, 7 months ago

Hi Li,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.9-rc7 next-20240506]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Li-Jun/LoongArch-Update-the-flush-cache-policy/20240506-172624
base:   linus/master
patch link:    https://lore.kernel.org/r/20240506092419.4109941-1-lijun01%40kylinos.cn
patch subject: [PATCH] LoongArch: Update the flush cache policy
config: loongarch-allnoconfig
compiler: loongarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build):

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405071251.5uvKqYFh-lkp@intel.com/

All warnings (new ones prefixed by >>):

   arch/loongarch/mm/cache.c: In function 'flush_cache_last_level':
>> arch/loongarch/mm/cache.c:69:29: warning: variable 'way_size' set but not used [-Wunused-but-set-variable]
      69 |         int i, j, nr_nodes, way_size;
         |                             ^~~~~~~~


vim +/way_size +69 arch/loongarch/mm/cache.c

    65	
    66	static void flush_cache_last_level(unsigned int leaf)
    67	{
    68		u64 addr;
  > 69		int i, j, nr_nodes, way_size;
    70		struct cache_desc *cdesc = current_cpu_data.cache_leaves + leaf;
    71	
    72		nr_nodes = loongson_sysconf.nr_nodes;
    73	
    74		addr = CSR_DMW1_BASE;
    75		iocsr_write32(0x1, 0x280);
    76		way_size = cdesc->sets * cdesc->linesz;
    77		do {
    78			for (i = 0; i < (cdesc->ways * 3); i++) {
    79				for (j = 0; j < (cdesc->sets); j++) {
    80					*(volatile u32 *)addr;
    81					addr += cdesc->linesz;
    82				}
    83			}
    84			addr += 0x100000000000;
    85		} while (--nr_nodes > 0);
    86	}
    87	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git checkout linus/master
        b4 shazam https://lore.kernel.org/r/20240506092419.4109941-1-lijun01@kylinos.cn
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=loongarch olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash arch/loongarch/mm/
#
# Automatically generated file; DO NOT EDIT.
# Linux/loongarch 6.9.0-rc7 Kernel Configuration
#
CONFIG_CC_VERSION_TEXT="loongarch64-linux-gcc (GCC) 13.2.0"
CONFIG_CC_IS_GCC=y
CONFIG_GCC_VERSION=130200
CONFIG_CLANG_VERSION=0
CONFIG_AS_IS_GNU=y
CONFIG_AS_VERSION=24100
CONFIG_LD_IS_BFD=y
CONFIG_LD_VERSION=24100
CONFIG_LLD_VERSION=0
CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
CONFIG_GCC_ASM_GOTO_OUTPUT_WORKAROUND=y
CONFIG_CC_HAS_ASM_INLINE=y
CONFIG_CC_HAS_NO_PROFILE_FN_ATTR=y
CONFIG_PAHOLE_VERSION=126
CONFIG_IRQ_WORK=y
CONFIG_BUILDTIME_TABLE_SORT=y

#
# General setup
#
CONFIG_INIT_ENV_ARG_LIMIT=32
# CONFIG_COMPILE_TEST is not set
# CONFIG_WERROR is not set
CONFIG_LOCALVERSION=""
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_BUILD_SALT=""
CONFIG_DEFAULT_INIT=""
CONFIG_DEFAULT_HOSTNAME="(none)"
# CONFIG_SYSVIPC is not set
# CONFIG_WATCH_QUEUE 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_PROBE=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK=y
CONFIG_GENERIC_IRQ_CHIP=y
CONFIG_IRQ_DOMAIN=y
CONFIG_IRQ_DOMAIN_HIERARCHY=y
CONFIG_IRQ_FASTEOI_HIERARCHY_HANDLERS=y
CONFIG_GENERIC_MSI_IRQ=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y
# end of IRQ subsystem

CONFIG_GENERIC_IRQ_MULTI_HANDLER=y
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_CONTEXT_TRACKING=y
CONFIG_CONTEXT_TRACKING_IDLE=y

#
# Timers subsystem
#
CONFIG_HZ_PERIODIC=y
# CONFIG_NO_HZ_IDLE is not set
# CONFIG_NO_HZ_FULL is not set
# CONFIG_NO_HZ is not set
# CONFIG_HIGH_RES_TIMERS is not set
# end of Timers subsystem

CONFIG_HAVE_EBPF_JIT=y

#
# BPF subsystem
#
# CONFIG_BPF_SYSCALL is not set
# end of BPF subsystem

CONFIG_PREEMPT_NONE_BUILD=y
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set
# CONFIG_PREEMPT_DYNAMIC is not set

#
# CPU/Task time and stats accounting
#
CONFIG_TICK_CPU_ACCOUNTING=y
# 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

# CONFIG_CPU_ISOLATION is not set

#
# RCU Subsystem
#
CONFIG_TREE_RCU=y
# CONFIG_RCU_EXPERT is not set
CONFIG_TREE_SRCU=y
CONFIG_RCU_STALL_COMMON=y
CONFIG_RCU_NEED_SEGCBLIST=y
# end of RCU Subsystem

# CONFIG_IKCONFIG is not set
# CONFIG_IKHEADERS is not set
CONFIG_LOG_BUF_SHIFT=17
CONFIG_LOG_CPU_MAX_BUF_SHIFT=12
CONFIG_GENERIC_SCHED_CLOCK=y

#
# Scheduler features
#
# end of Scheduler features

CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
CONFIG_CC_HAS_INT128=y
CONFIG_CC_IMPLICIT_FALLTHROUGH="-Wimplicit-fallthrough=5"
CONFIG_GCC10_NO_ARRAY_BOUNDS=y
CONFIG_CC_NO_ARRAY_BOUNDS=y
CONFIG_GCC_NO_STRINGOP_OVERFLOW=y
CONFIG_CC_NO_STRINGOP_OVERFLOW=y
# CONFIG_CGROUPS is not set
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_TIME_NS is not set
# CONFIG_USER_NS is not set
# CONFIG_PID_NS is not set
# CONFIG_CHECKPOINT_RESTORE is not set
# CONFIG_SCHED_AUTOGROUP is not set
# CONFIG_RELAY is not set
# CONFIG_BLK_DEV_INITRD is not set
# CONFIG_BOOT_CONFIG is not set
# CONFIG_INITRAMFS_PRESERVE_MTIME is not set
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_LD_ORPHAN_WARN=y
CONFIG_LD_ORPHAN_WARN_LEVEL="warn"
CONFIG_SYSCTL=y
CONFIG_SYSCTL_EXCEPTION_TRACE=y
CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN=y
CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW=y
# CONFIG_EXPERT is not set
CONFIG_MULTIUSER=y
CONFIG_SYSFS_SYSCALL=y
CONFIG_FHANDLE=y
CONFIG_POSIX_TIMERS=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_FUTEX_PI=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
CONFIG_IO_URING=y
CONFIG_ADVISE_SYSCALLS=y
CONFIG_MEMBARRIER=y
CONFIG_RSEQ=y
CONFIG_CACHESTAT_SYSCALL=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_SELFTEST is not set
CONFIG_KALLSYMS_BASE_RELATIVE=y
CONFIG_HAVE_PERF_EVENTS=y
CONFIG_PERF_USE_VMALLOC=y

#
# Kernel Performance Events And Counters
#
# CONFIG_PERF_EVENTS is not set
# end of Kernel Performance Events And Counters

# CONFIG_PROFILING is not set

#
# Kexec and crash features
#
# CONFIG_KEXEC is not set
# end of Kexec and crash features
# end of General setup

CONFIG_LOONGARCH=y
CONFIG_64BIT=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_CSUM=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_L1_CACHE_SHIFT=6
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_MACH_LOONGSON64=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_PGTABLE_3LEVEL=y
CONFIG_PGTABLE_LEVELS=3
CONFIG_SCHED_OMIT_FRAME_POINTER=y
CONFIG_AS_HAS_EXPLICIT_RELOCS=y
CONFIG_AS_HAS_FCSR_CLASS=y
CONFIG_AS_HAS_LSX_EXTENSION=y
CONFIG_AS_HAS_LASX_EXTENSION=y
CONFIG_AS_HAS_LBT_EXTENSION=y
CONFIG_AS_HAS_LVZ_EXTENSION=y

#
# Kernel type and options
#
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
# CONFIG_4KB_3LEVEL is not set
# CONFIG_4KB_4LEVEL is not set
# CONFIG_16KB_2LEVEL is not set
CONFIG_16KB_3LEVEL=y
# CONFIG_64KB_2LEVEL is not set
# CONFIG_64KB_3LEVEL is not set
CONFIG_CMDLINE=""
CONFIG_CMDLINE_BOOTLOADER=y
# CONFIG_CMDLINE_EXTEND is not set
# CONFIG_CMDLINE_FORCE is not set
# CONFIG_BUILTIN_DTB is not set
# CONFIG_DMI is not set
CONFIG_EFI=y
# CONFIG_EFI_STUB is not set
# CONFIG_SCHED_SMT is not set
CONFIG_SMP=y
# CONFIG_HOTPLUG_CPU is not set
CONFIG_NR_CPUS=64
# CONFIG_NUMA is not set
CONFIG_ARCH_FORCE_MAX_ORDER=11
# CONFIG_ARCH_IOREMAP is not set
# CONFIG_ARCH_WRITECOMBINE is not set
CONFIG_ARCH_STRICT_ALIGN=y
CONFIG_CPU_HAS_FPU=y
# CONFIG_CPU_HAS_LSX is not set
# CONFIG_CPU_HAS_LBT is not set
CONFIG_CPU_HAS_PREFETCH=y
CONFIG_ARCH_SUPPORTS_KEXEC=y
CONFIG_ARCH_SUPPORTS_CRASH_DUMP=y
# CONFIG_RELOCATABLE is not set
CONFIG_HAVE_LIVEPATCH=y
# end of Kernel type and options

CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_MMU=y
CONFIG_ARCH_MMAP_RND_BITS_MIN=12
CONFIG_ARCH_MMAP_RND_BITS_MAX=18
CONFIG_ARCH_SUPPORTS_UPROBES=y

#
# Power management options
#
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
# CONFIG_SUSPEND is not set
# CONFIG_PM is not set
CONFIG_CPU_PM=y
CONFIG_ARCH_SUPPORTS_ACPI=y
CONFIG_ACPI=y
CONFIG_ACPI_GENERIC_GSI=y
CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT=y
# CONFIG_ACPI_DEBUGGER is not set
# CONFIG_ACPI_SPCR_TABLE is not set
# CONFIG_ACPI_EC_DEBUGFS is not set
# CONFIG_ACPI_AC is not set
# CONFIG_ACPI_BATTERY is not set
# CONFIG_ACPI_BUTTON is not set
# CONFIG_ACPI_TINY_POWER_BUTTON is not set
# CONFIG_ACPI_DOCK is not set
CONFIG_ACPI_MCFG=y
# CONFIG_ACPI_PROCESSOR is not set
CONFIG_ACPI_CUSTOM_DSDT_FILE=""
CONFIG_ARCH_HAS_ACPI_TABLE_UPGRADE=y
# CONFIG_ACPI_DEBUG is not set
# CONFIG_ACPI_PCI_SLOT is not set
# CONFIG_ACPI_CONTAINER is not set
# CONFIG_ACPI_HED is not set
# CONFIG_ACPI_CONFIGFS is not set
# CONFIG_ACPI_PFRUT is not set
CONFIG_ACPI_PPTT=y
# CONFIG_ACPI_FFH is not set
# CONFIG_PMIC_OPREGION is not set
# end of Power management options

# CONFIG_VIRTUALIZATION is not set
CONFIG_CPU_MITIGATIONS=y

#
# General architecture-dependent options
#
CONFIG_GENERIC_ENTRY=y
# CONFIG_JUMP_LABEL is not set
CONFIG_HAVE_64BIT_ALIGNED_ACCESS=y
CONFIG_ARCH_USE_BUILTIN_BSWAP=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_KPROBES_ON_FTRACE=y
CONFIG_HAVE_FUNCTION_ERROR_INJECTION=y
CONFIG_HAVE_NMI=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_HAVE_DMA_CONTIGUOUS=y
CONFIG_GENERIC_SMP_IDLE_THREAD=y
CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
CONFIG_ARCH_HAS_CPU_FINALIZE_INIT=y
CONFIG_ARCH_WANTS_NO_INSTR=y
CONFIG_HAVE_ASM_MODVERSIONS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_RSEQ=y
CONFIG_HAVE_RUST=y
CONFIG_HAVE_FUNCTION_ARG_ACCESS_API=y
CONFIG_HAVE_PERF_REGS=y
CONFIG_HAVE_PERF_USER_STACK_DUMP=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_HAVE_ARCH_JUMP_LABEL_RELATIVE=y
CONFIG_MMU_GATHER_MERGE_VMAS=y
CONFIG_MMU_LAZY_TLB_REFCOUNT=y
CONFIG_ARCH_HAS_NMI_SAFE_THIS_CPU_OPS=y
CONFIG_HAVE_ARCH_SECCOMP=y
CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
# CONFIG_SECCOMP is not set
CONFIG_HAVE_STACKPROTECTOR=y
# CONFIG_STACKPROTECTOR is not set
CONFIG_ARCH_SUPPORTS_LTO_CLANG=y
CONFIG_ARCH_SUPPORTS_LTO_CLANG_THIN=y
CONFIG_LTO_NONE=y
CONFIG_HAVE_CONTEXT_TRACKING_USER=y
CONFIG_HAVE_TIF_NOHZ=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
CONFIG_HAVE_EXIT_THREAD=y
CONFIG_ARCH_MMAP_RND_BITS=12
CONFIG_HAVE_PAGE_SIZE_16KB=y
CONFIG_PAGE_SIZE_16KB=y
CONFIG_PAGE_SIZE_LESS_THAN_64KB=y
CONFIG_PAGE_SIZE_LESS_THAN_256KB=y
CONFIG_PAGE_SHIFT=14
CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT=y
CONFIG_HAVE_OBJTOOL=y
CONFIG_HAVE_STACK_VALIDATION=y
# CONFIG_COMPAT_32BIT_TIME is not set
CONFIG_HAVE_PREEMPT_DYNAMIC=y
CONFIG_HAVE_PREEMPT_DYNAMIC_KEY=y
CONFIG_ARCH_WANT_LD_ORPHAN_WARN=y

#
# GCOV-based kernel profiling
#
# end of GCOV-based kernel profiling

CONFIG_HAVE_GCC_PLUGINS=y
# CONFIG_GCC_PLUGINS is not set
CONFIG_FUNCTION_ALIGNMENT=0
# end of General architecture-dependent options

CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
# CONFIG_MODULES is not set
CONFIG_BLOCK=y
# CONFIG_BLOCK_LEGACY_AUTOLOAD is not set
# CONFIG_BLK_DEV_BSGLIB is not set
# CONFIG_BLK_DEV_INTEGRITY is not set
# CONFIG_BLK_DEV_WRITE_MOUNTED is not set
# CONFIG_BLK_DEV_ZONED is not set
# CONFIG_BLK_WBT is not set
# CONFIG_BLK_INLINE_ENCRYPTION is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_EFI_PARTITION=y
# end of Partition Types

CONFIG_BLK_MQ_PCI=y

#
# IO Schedulers
#
# CONFIG_MQ_IOSCHED_DEADLINE is not set
# CONFIG_MQ_IOSCHED_KYBER is not set
# CONFIG_IOSCHED_BFQ is not set
# end of IO Schedulers

CONFIG_ARCH_INLINE_SPIN_TRYLOCK=y
CONFIG_ARCH_INLINE_SPIN_TRYLOCK_BH=y
CONFIG_ARCH_INLINE_SPIN_LOCK=y
CONFIG_ARCH_INLINE_SPIN_LOCK_BH=y
CONFIG_ARCH_INLINE_SPIN_LOCK_IRQ=y
CONFIG_ARCH_INLINE_SPIN_LOCK_IRQSAVE=y
CONFIG_ARCH_INLINE_SPIN_UNLOCK=y
CONFIG_ARCH_INLINE_SPIN_UNLOCK_BH=y
CONFIG_ARCH_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE=y
CONFIG_ARCH_INLINE_READ_LOCK=y
CONFIG_ARCH_INLINE_READ_LOCK_BH=y
CONFIG_ARCH_INLINE_READ_LOCK_IRQ=y
CONFIG_ARCH_INLINE_READ_LOCK_IRQSAVE=y
CONFIG_ARCH_INLINE_READ_UNLOCK=y
CONFIG_ARCH_INLINE_READ_UNLOCK_BH=y
CONFIG_ARCH_INLINE_READ_UNLOCK_IRQ=y
CONFIG_ARCH_INLINE_READ_UNLOCK_IRQRESTORE=y
CONFIG_ARCH_INLINE_WRITE_LOCK=y
CONFIG_ARCH_INLINE_WRITE_LOCK_BH=y
CONFIG_ARCH_INLINE_WRITE_LOCK_IRQ=y
CONFIG_ARCH_INLINE_WRITE_LOCK_IRQSAVE=y
CONFIG_ARCH_INLINE_WRITE_UNLOCK=y
CONFIG_ARCH_INLINE_WRITE_UNLOCK_BH=y
CONFIG_ARCH_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE=y
CONFIG_INLINE_SPIN_TRYLOCK=y
CONFIG_INLINE_SPIN_TRYLOCK_BH=y
CONFIG_INLINE_SPIN_LOCK=y
CONFIG_INLINE_SPIN_LOCK_BH=y
CONFIG_INLINE_SPIN_LOCK_IRQ=y
CONFIG_INLINE_SPIN_LOCK_IRQSAVE=y
CONFIG_INLINE_SPIN_UNLOCK_BH=y
CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE=y
CONFIG_INLINE_READ_LOCK=y
CONFIG_INLINE_READ_LOCK_BH=y
CONFIG_INLINE_READ_LOCK_IRQ=y
CONFIG_INLINE_READ_LOCK_IRQSAVE=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_BH=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK_IRQRESTORE=y
CONFIG_INLINE_WRITE_LOCK=y
CONFIG_INLINE_WRITE_LOCK_BH=y
CONFIG_INLINE_WRITE_LOCK_IRQ=y
CONFIG_INLINE_WRITE_LOCK_IRQSAVE=y
CONFIG_INLINE_WRITE_UNLOCK=y
CONFIG_INLINE_WRITE_UNLOCK_BH=y
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE=y
CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
CONFIG_MUTEX_SPIN_ON_OWNER=y
CONFIG_RWSEM_SPIN_ON_OWNER=y
CONFIG_LOCK_SPIN_ON_OWNER=y
CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y
CONFIG_QUEUED_SPINLOCKS=y
CONFIG_ARCH_USE_QUEUED_RWLOCKS=y
CONFIG_QUEUED_RWLOCKS=y
CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y

#
# Executable file formats
#
# CONFIG_BINFMT_ELF is not set
CONFIG_ARCH_BINFMT_ELF_STATE=y
# CONFIG_BINFMT_SCRIPT is not set
# CONFIG_BINFMT_MISC is not set
CONFIG_COREDUMP=y
# end of Executable file formats

#
# Memory Management options
#
# CONFIG_SWAP is not set

#
# Slab allocator options
#
CONFIG_SLUB=y
# CONFIG_SLAB_MERGE_DEFAULT is not set
# CONFIG_SLAB_FREELIST_RANDOM is not set
# CONFIG_SLAB_FREELIST_HARDENED is not set
# CONFIG_SLUB_STATS is not set
# CONFIG_SLUB_CPU_PARTIAL is not set
# CONFIG_RANDOM_KMALLOC_CACHES is not set
# end of Slab allocator options

# CONFIG_SHUFFLE_PAGE_ALLOCATOR is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP=y
CONFIG_HAVE_FAST_GUP=y
CONFIG_ARCH_KEEP_MEMBLOCK=y
CONFIG_EXCLUSIVE_SYSTEM_RAM=y
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_COMPACTION is not set
# CONFIG_PAGE_REPORTING is not set
# CONFIG_MIGRATION is not set
CONFIG_PCP_BATCH_SCALE_MAX=5
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_EMBED_FIRST_CHUNK=y
CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
CONFIG_USE_PERCPU_NUMA_NODE_ID=y
# CONFIG_CMA is not set
# CONFIG_IDLE_PAGE_TRACKING is not set
CONFIG_ARCH_HAS_CURRENT_STACK_POINTER=y
CONFIG_ZONE_DMA32=y
CONFIG_VM_EVENT_COUNTERS=y
# CONFIG_PERCPU_STATS is not set

#
# GUP_TEST needs to have DEBUG_FS enabled
#
# CONFIG_DMAPOOL_TEST is not set
CONFIG_ARCH_HAS_PTE_SPECIAL=y
# CONFIG_ANON_VMA_NAME is not set
# CONFIG_USERFAULTFD is not set
# CONFIG_LRU_GEN is not set
CONFIG_LOCK_MM_AND_FIND_VMA=y

#
# Data Access Monitoring
#
# CONFIG_DAMON is not set
# end of Data Access Monitoring
# end of Memory Management options

# CONFIG_NET is not set

#
# Device Drivers
#
CONFIG_HAVE_PCI=y
CONFIG_GENERIC_PCI_IOMAP=y
CONFIG_PCI=y
CONFIG_PCI_DOMAINS=y
CONFIG_PCI_DOMAINS_GENERIC=y
# CONFIG_PCIEPORTBUS is not set
CONFIG_PCIEASPM=y
CONFIG_PCIEASPM_DEFAULT=y
# CONFIG_PCIEASPM_POWERSAVE is not set
# CONFIG_PCIEASPM_POWER_SUPERSAVE is not set
# CONFIG_PCIEASPM_PERFORMANCE is not set
# CONFIG_PCIE_PTM is not set
CONFIG_PCI_MSI=y
CONFIG_PCI_MSI_ARCH_FALLBACKS=y
CONFIG_PCI_QUIRKS=y
# CONFIG_PCI_STUB is not set
CONFIG_PCI_ECAM=y
# CONFIG_PCI_IOV is not set
# CONFIG_PCI_PRI is not set
# CONFIG_PCI_PASID is not set
CONFIG_PCI_LABEL=y
# CONFIG_PCI_DYNAMIC_OF_NODES is not set
CONFIG_VGA_ARB=y
CONFIG_VGA_ARB_MAX_GPUS=16
# CONFIG_HOTPLUG_PCI is not set

#
# PCI controller drivers
#
# CONFIG_PCI_FTPCI100 is not set
# CONFIG_PCI_HOST_GENERIC is not set
CONFIG_PCI_LOONGSON=y
# CONFIG_PCIE_MICROCHIP_HOST is not set
# CONFIG_PCIE_XILINX is not set

#
# Cadence-based PCIe controllers
#
# CONFIG_PCIE_CADENCE_PLAT_HOST is not set
# end of Cadence-based PCIe controllers

#
# DesignWare-based PCIe controllers
#
# CONFIG_PCI_MESON is not set
# CONFIG_PCIE_DW_PLAT_HOST is not set
# end of DesignWare-based PCIe controllers

#
# Mobiveil-based PCIe controllers
#
# end of Mobiveil-based PCIe controllers
# end of PCI controller drivers

#
# PCI Endpoint
#
# CONFIG_PCI_ENDPOINT is not set
# end of PCI Endpoint

#
# PCI switch controller drivers
#
# CONFIG_PCI_SW_SWITCHTEC is not set
# end of PCI switch controller drivers

# CONFIG_CXL_BUS is not set
# CONFIG_PCCARD is not set
# CONFIG_RAPIDIO 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=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_FW_LOADER_USER_HELPER is not set
# CONFIG_FW_LOADER_COMPRESS is not set
# CONFIG_FW_UPLOAD is not set
# end of Firmware loader

CONFIG_ALLOW_DEV_COREDUMP=y
CONFIG_GENERIC_CPU_DEVICES=y
CONFIG_GENERIC_CPU_AUTOPROBE=y
# CONFIG_FW_DEVLINK_SYNC_STATE_TIMEOUT is not set
# end of Generic Driver Options

#
# Bus devices
#
# CONFIG_MHI_BUS is not set
# CONFIG_MHI_BUS_EP is not set
# end of Bus devices

#
# Cache Drivers
#
# end of Cache Drivers

#
# Firmware Drivers
#

#
# ARM System Control and Management Interface Protocol
#
# end of ARM System Control and Management Interface Protocol

# CONFIG_SYSFB_SIMPLEFB is not set
# CONFIG_GOOGLE_FIRMWARE is not set

#
# EFI (Extensible Firmware Interface) Support
#
CONFIG_EFI_ESRT=y
CONFIG_EFI_RUNTIME_WRAPPERS=y
# CONFIG_EFI_BOOTLOADER_CONTROL is not set
# CONFIG_EFI_CAPSULE_LOADER is not set
# CONFIG_EFI_TEST is not set
# CONFIG_EFI_DISABLE_PCI_DMA is not set
# CONFIG_EFI_CUSTOM_SSDT_OVERLAYS is not set
# CONFIG_EFI_DISABLE_RUNTIME is not set
# CONFIG_EFI_COCO_SECRET is not set
# end of EFI (Extensible Firmware Interface) Support

#
# Qualcomm firmware drivers
#
# end of Qualcomm firmware drivers

#
# Tegra firmware driver
#
# end of Tegra firmware driver
# end of Firmware Drivers

# 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_ARCH_MIGHT_HAVE_PC_PARPORT=y
# CONFIG_PARPORT is not set
CONFIG_PNP=y
# CONFIG_PNP_DEBUG_MESSAGES is not set

#
# Protocols
#
CONFIG_PNPACPI=y
# CONFIG_BLK_DEV is not set

#
# NVME Support
#
# CONFIG_BLK_DEV_NVME is not set
# CONFIG_NVME_FC is not set
# end of NVME Support

#
# Misc devices
#
# CONFIG_DUMMY_IRQ is not set
# CONFIG_PHANTOM is not set
# CONFIG_TIFM_CORE is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_HP_ILO is not set
# CONFIG_SRAM is not set
# CONFIG_DW_XDATA_PCIE is not set
# CONFIG_PCI_ENDPOINT_TEST is not set
# CONFIG_XILINX_SDFEC is not set
# CONFIG_OPEN_DICE is not set
# CONFIG_VCPU_STALL_DETECTOR is not set
# CONFIG_C2PORT is not set

#
# EEPROM support
#
# CONFIG_EEPROM_93CX6 is not set
# end of EEPROM support

# CONFIG_CB710_CORE is not set

#
# Texas Instruments shared transport line discipline
#
# end of Texas Instruments shared transport line discipline

#
# Altera FPGA firmware download module (requires I2C)
#
# CONFIG_GENWQE is not set
# CONFIG_ECHO is not set
# CONFIG_BCM_VK is not set
# CONFIG_MISC_ALCOR_PCI is not set
# CONFIG_MISC_RTSX_PCI is not set
# CONFIG_PVPANIC is not set
# end of Misc devices

#
# 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_FUSION is not set

#
# IEEE 1394 (FireWire) support
#
# CONFIG_FIREWIRE is not set
# CONFIG_FIREWIRE_NOSY is not set
# end of IEEE 1394 (FireWire) support

#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_INPUT_SPARSEKMAP is not set
# CONFIG_INPUT_MATRIXKMAP is not set

#
# Userland interfaces
#
# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_EVDEV is not set
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set
# CONFIG_RMI4_CORE 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=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_LEGACY_TIOCSTI is not set
# CONFIG_LDISC_AUTOLOAD is not set

#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_UARTLITE is not set
# CONFIG_SERIAL_JSM 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_RP2 is not set
# CONFIG_SERIAL_FSL_LPUART is not set
# CONFIG_SERIAL_FSL_LINFLEXUART is not set
# CONFIG_SERIAL_CONEXANT_DIGICOLOR is not set
# CONFIG_SERIAL_SPRD is not set
# end of Serial drivers

# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set
# CONFIG_NULL_TTY is not set
# CONFIG_SERIAL_DEV_BUS is not set
# CONFIG_VIRTIO_CONSOLE is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_APPLICOM is not set
# CONFIG_DEVMEM is not set
# CONFIG_DEVPORT is not set
# CONFIG_TCG_TPM is not set
# CONFIG_XILLYBUS is not set
# end of Character devices

#
# 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
#
CONFIG_PTP_1588_CLOCK_OPTIONAL=y

#
# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
#
# end of PTP clock support

# CONFIG_PINCTRL is not set
CONFIG_GPIOLIB=y
CONFIG_GPIOLIB_FASTPATH_LIMIT=512
CONFIG_OF_GPIO=y
CONFIG_GPIO_ACPI=y
CONFIG_GPIO_CDEV=y
# CONFIG_GPIO_CDEV_V1 is not set

#
# Memory mapped GPIO drivers
#
# CONFIG_GPIO_74XX_MMIO is not set
# CONFIG_GPIO_ALTERA is not set
# CONFIG_GPIO_AMDPT is not set
# CONFIG_GPIO_CADENCE is not set
# CONFIG_GPIO_DWAPB is not set
# CONFIG_GPIO_FTGPIO010 is not set
# CONFIG_GPIO_GENERIC_PLATFORM is not set
# CONFIG_GPIO_GRGPIO is not set
# CONFIG_GPIO_HLWD is not set
# CONFIG_GPIO_LOONGSON_64BIT is not set
# CONFIG_GPIO_MB86S7X is not set
# CONFIG_GPIO_SIFIVE is not set
# CONFIG_GPIO_XILINX is not set
# CONFIG_GPIO_AMD_FCH is not set
# end of Memory mapped GPIO drivers

#
# MFD GPIO expanders
#
# end of MFD GPIO expanders

#
# PCI GPIO expanders
#
# CONFIG_GPIO_BT8XX is not set
# CONFIG_GPIO_PCI_IDIO_16 is not set
# CONFIG_GPIO_PCIE_IDIO_24 is not set
# CONFIG_GPIO_RDC321X is not set
# end of PCI GPIO expanders

#
# Virtual GPIO drivers
#
# CONFIG_GPIO_AGGREGATOR is not set
# CONFIG_GPIO_LATCH is not set
# CONFIG_GPIO_MOCKUP is not set
# CONFIG_GPIO_SIM is not set
# end of Virtual GPIO drivers

# CONFIG_W1 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_LPC_ICH is not set
# CONFIG_LPC_SCH is not set
# CONFIG_MFD_JANZ_CMODIO is not set
# CONFIG_MFD_KEMPLD is not set
# CONFIG_MFD_MT6397 is not set
# CONFIG_MFD_RDC321X is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_MFD_SYSCON is not set
# CONFIG_MFD_TQMX86 is not set
# CONFIG_MFD_VX855 is not set
# end of Multifunction device drivers

# CONFIG_REGULATOR is not set
# CONFIG_RC_CORE is not set

#
# CEC support
#
# CONFIG_MEDIA_CEC_SUPPORT is not set
# end of CEC support

# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
# CONFIG_AUXDISPLAY is not set
# CONFIG_DRM is not set

#
# 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

#
# Console display driver support
#
CONFIG_DUMMY_CONSOLE=y
CONFIG_DUMMY_CONSOLE_COLUMNS=80
CONFIG_DUMMY_CONSOLE_ROWS=25
# end of Console display driver support
# end of Graphics support

# CONFIG_SOUND is not set
# CONFIG_HID_SUPPORT 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_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_UIO is not set
# CONFIG_VFIO is not set
# CONFIG_VIRT_DRIVERS is not set
# CONFIG_VIRTIO_MENU is not set
# CONFIG_VHOST_MENU is not set

#
# Microsoft Hyper-V guest support
#
# end of Microsoft Hyper-V guest support

# CONFIG_GREYBUS is not set
# CONFIG_COMEDI is not set
# CONFIG_STAGING is not set
# CONFIG_LOONGARCH_PLATFORM_DEVICES is not set
# CONFIG_GOLDFISH is not set
CONFIG_HAVE_CLK=y
CONFIG_HAVE_CLK_PREPARE=y
CONFIG_COMMON_CLK=y
# CONFIG_COMMON_CLK_AXI_CLKGEN is not set
# CONFIG_COMMON_CLK_LOONGSON2 is not set
# CONFIG_COMMON_CLK_FIXED_MMIO is not set
# CONFIG_XILINX_VCU is not set
# CONFIG_COMMON_CLK_XLNX_CLKWZRD is not set
# CONFIG_HWSPINLOCK is not set

#
# Clock Source drivers
#
# 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

#
# Broadcom SoC drivers
#
# end of Broadcom SoC drivers

#
# NXP/Freescale QorIQ SoC drivers
#
# end of NXP/Freescale QorIQ SoC drivers

#
# fujitsu SoC drivers
#
# end of fujitsu SoC drivers

#
# i.MX SoC drivers
#
# end of i.MX SoC drivers

#
# Enable LiteX SoC Builder specific drivers
#
# CONFIG_LITEX_SOC_CONTROLLER is not set
# end of Enable LiteX SoC Builder specific drivers

# CONFIG_LOONGSON2_GUTS is not set
# CONFIG_LOONGSON2_PM is not set
# CONFIG_WPCM450_SOC is not set

#
# Qualcomm SoC drivers
#
# end of Qualcomm SoC drivers

# CONFIG_SOC_TI is not set

#
# Xilinx SoC drivers
#
# end of Xilinx SoC drivers
# end of SOC (System On Chip) specific Drivers

#
# PM Domains
#

#
# Amlogic PM Domains
#
# end of Amlogic PM Domains

#
# Broadcom PM Domains
#
# end of Broadcom PM Domains

#
# i.MX PM Domains
#
# end of i.MX PM Domains

#
# Qualcomm PM Domains
#
# end of Qualcomm PM Domains
# end of PM Domains

# CONFIG_PM_DEVFREQ is not set
# CONFIG_EXTCON is not set
# CONFIG_MEMORY is not set
# CONFIG_IIO is not set
# CONFIG_NTB is not set
# CONFIG_PWM is not set

#
# IRQ chip support
#
CONFIG_IRQCHIP=y
# CONFIG_AL_FIC is not set
# CONFIG_XILINX_INTC is not set
CONFIG_IRQ_LOONGARCH_CPU=y
CONFIG_LOONGSON_LIOINTC=y
CONFIG_LOONGSON_EIOINTC=y
CONFIG_LOONGSON_HTVEC=y
CONFIG_LOONGSON_PCH_PIC=y
CONFIG_LOONGSON_PCH_MSI=y
CONFIG_LOONGSON_PCH_LPC=y
# 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_PHY_CAN_TRANSCEIVER is not set

#
# PHY drivers for Broadcom platforms
#
# CONFIG_BCM_KONA_USB2_PHY is not set
# end of PHY drivers for Broadcom platforms

# CONFIG_PHY_CADENCE_TORRENT is not set
# CONFIG_PHY_CADENCE_DPHY is not set
# CONFIG_PHY_CADENCE_DPHY_RX is not set
# CONFIG_PHY_CADENCE_SALVO is not set
# CONFIG_PHY_PXA_28NM_HSIC is not set
# CONFIG_PHY_PXA_28NM_USB2 is not set
# end of PHY Subsystem

# CONFIG_POWERCAP is not set
# CONFIG_MCB is not set
# CONFIG_RAS is not set
# CONFIG_USB4 is not set

#
# Android
#
# CONFIG_ANDROID_BINDER_IPC is not set
# end of Android

# 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
# CONFIG_PECI is not set
# CONFIG_HTE is not set
# end of Device Drivers

#
# File systems
#
# 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 is not set
# 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_BCACHEFS_FS is not set
CONFIG_EXPORTFS=y
# CONFIG_EXPORTFS_BLOCK_OPS is not set
CONFIG_FILE_LOCKING=y
# 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_AUTOFS_FS is not set
# CONFIG_FUSE_FS is not set
# CONFIG_OVERLAY_FS is not set

#
# Caches
#
# 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/EXFAT/NT Filesystems
#
# CONFIG_MSDOS_FS is not set
# CONFIG_VFAT_FS is not set
# CONFIG_EXFAT_FS is not set
# CONFIG_NTFS3_FS is not set
# CONFIG_NTFS_FS is not set
# end of DOS/FAT/EXFAT/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_TMPFS is not set
CONFIG_ARCH_SUPPORTS_HUGETLBFS=y
# CONFIG_HUGETLBFS is not set
# CONFIG_CONFIGFS_FS is not set
# CONFIG_EFIVAR_FS is not set
# end of Pseudo filesystems

# CONFIG_MISC_FILESYSTEMS is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
# CONFIG_NLS_CODEPAGE_437 is not set
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
# CONFIG_NLS_ASCII is not set
# CONFIG_NLS_ISO8859_1 is not set
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
# CONFIG_NLS_MAC_ROMAN is not set
# CONFIG_NLS_MAC_CELTIC is not set
# CONFIG_NLS_MAC_CENTEURO is not set
# CONFIG_NLS_MAC_CROATIAN is not set
# CONFIG_NLS_MAC_CYRILLIC is not set
# CONFIG_NLS_MAC_GAELIC is not set
# CONFIG_NLS_MAC_GREEK is not set
# CONFIG_NLS_MAC_ICELAND is not set
# CONFIG_NLS_MAC_INUIT is not set
# CONFIG_NLS_MAC_ROMANIAN is not set
# CONFIG_NLS_MAC_TURKISH is not set
# CONFIG_NLS_UTF8 is not set
# CONFIG_UNICODE is not set
CONFIG_IO_WQ=y
# 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_HARDENED_USERCOPY is not set
# CONFIG_FORTIFY_SOURCE is not set
# CONFIG_STATIC_USERMODEHELPER is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_LSM="landlock,lockdown,yama,loadpin,safesetid,bpf"

#
# Kernel hardening options
#

#
# Memory initialization
#
CONFIG_CC_HAS_AUTO_VAR_INIT_PATTERN=y
CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_BARE=y
CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO=y
# CONFIG_INIT_STACK_NONE is not set
# CONFIG_INIT_STACK_ALL_PATTERN is not set
CONFIG_INIT_STACK_ALL_ZERO=y
# CONFIG_INIT_ON_ALLOC_DEFAULT_ON is not set
# CONFIG_INIT_ON_FREE_DEFAULT_ON is not set
CONFIG_CC_HAS_ZERO_CALL_USED_REGS=y
# CONFIG_ZERO_CALL_USED_REGS is not set
# end of Memory initialization

#
# Hardening of kernel data structures
#
# CONFIG_LIST_HARDENED is not set
# CONFIG_BUG_ON_DATA_CORRUPTION is not set
# end of Hardening of kernel data structures

CONFIG_RANDSTRUCT_NONE=y
# end of Kernel hardening options
# end of Security options

# CONFIG_CRYPTO is not set

#
# 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_PRIME_NUMBERS is not set
CONFIG_RATIONAL=y
CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y

#
# Crypto library routines
#
CONFIG_CRYPTO_LIB_BLAKE2S_GENERIC=y
# 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
# end of Crypto library routines

# CONFIG_CRC_CCITT is not set
# CONFIG_CRC16 is not set
# CONFIG_CRC_T10DIF is not set
# CONFIG_CRC64_ROCKSOFT 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_XZ_DEC is not set
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_IOPORT_MAP=y
CONFIG_HAS_DMA=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_ARCH_DMA_ADDR_T_64BIT=y
CONFIG_DMA_DECLARE_COHERENT=y
CONFIG_SWIOTLB=y
# CONFIG_SWIOTLB_DYNAMIC is not set
# CONFIG_DMA_RESTRICTED_POOL is not set
# CONFIG_DMA_API_DEBUG is not set
# CONFIG_IRQ_POLL is not set
CONFIG_LIBFDT=y
CONFIG_UCS2_STRING=y
CONFIG_HAVE_GENERIC_VDSO=y
CONFIG_GENERIC_GETTIMEOFDAY=y
CONFIG_GENERIC_VDSO_TIME_NS=y
CONFIG_ARCH_STACKWALK=y
CONFIG_STACKDEPOT=y
CONFIG_STACKDEPOT_MAX_FRAMES=64
CONFIG_SBITMAP=y
# CONFIG_LWQ_TEST is not set
# end of Library routines

CONFIG_GENERIC_IOREMAP=y
CONFIG_GENERIC_LIB_ASHLDI3=y
CONFIG_GENERIC_LIB_ASHRDI3=y
CONFIG_GENERIC_LIB_LSHRDI3=y
CONFIG_GENERIC_LIB_CMPDI2=y
CONFIG_GENERIC_LIB_UCMPDI2=y
CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED=y
CONFIG_FIRMWARE_TABLE=y

#
# Kernel hacking
#

#
# printk and dmesg options
#
# CONFIG_PRINTK_TIME is not set
# CONFIG_PRINTK_CALLER is not set
# CONFIG_STACKTRACE_BUILD_ID is not set
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
CONFIG_CONSOLE_LOGLEVEL_QUIET=4
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
# CONFIG_DYNAMIC_DEBUG is not set
# CONFIG_DYNAMIC_DEBUG_CORE is not set
# CONFIG_SYMBOLIC_ERRNAME is not set
CONFIG_DEBUG_BUGVERBOSE=y
# end of printk and dmesg options

# CONFIG_DEBUG_KERNEL is not set

#
# Compile-time checks and compiler options
#
CONFIG_AS_HAS_NON_CONST_ULEB128=y
CONFIG_FRAME_WARN=2048
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_HEADERS_INSTALL is not set
CONFIG_DEBUG_SECTION_MISMATCH=y
CONFIG_SECTION_MISMATCH_WARN_ONLY=y
# 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_UBSAN is not set
CONFIG_HAVE_KCSAN_COMPILER=y
# end of Generic Kernel Debugging Instruments

#
# Networking Debugging
#
# end of Networking Debugging

#
# Memory Debugging
#
# CONFIG_PAGE_EXTENSION is not set
CONFIG_SLUB_DEBUG=y
# CONFIG_SLUB_DEBUG_ON is not set
# CONFIG_PAGE_POISONING is not set
CONFIG_HAVE_DEBUG_KMEMLEAK=y
CONFIG_DEBUG_MEMORY_INIT=y
CONFIG_HAVE_DEBUG_STACKOVERFLOW=y
CONFIG_HAVE_ARCH_KASAN=y
CONFIG_ARCH_DISABLE_KASAN_INLINE=y
CONFIG_CC_HAS_KASAN_GENERIC=y
CONFIG_CC_HAS_WORKING_NOSANITIZE_ADDRESS=y
# CONFIG_KASAN is not set
CONFIG_HAVE_ARCH_KFENCE=y
# CONFIG_KFENCE is not set
# end of Memory Debugging

#
# Debug Oops, Lockups and Hangs
#
# CONFIG_PANIC_ON_OOPS is not set
CONFIG_PANIC_ON_OOPS_VALUE=0
CONFIG_PANIC_TIMEOUT=0
CONFIG_HAVE_HARDLOCKUP_DETECTOR_BUDDY=y
# end of Debug Oops, Lockups and Hangs

#
# Scheduler Debugging
#
# end of Scheduler Debugging

# CONFIG_DEBUG_TIMEKEEPING is not set

#
# Lock Debugging (spinlocks, mutexes, etc...)
#
CONFIG_LOCK_DEBUGGING_SUPPORT=y
# CONFIG_WW_MUTEX_SELFTEST is not set
# end of Lock Debugging (spinlocks, mutexes, etc...)

# CONFIG_DEBUG_IRQFLAGS is not set
CONFIG_STACKTRACE=y
# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set

#
# Debug kernel data structures
#
# end of Debug kernel data structures

#
# RCU Debugging
#
CONFIG_RCU_CPU_STALL_TIMEOUT=21
CONFIG_RCU_EXP_CPU_STALL_TIMEOUT=0
# CONFIG_RCU_CPU_STALL_CPUTIME is not set
# end of RCU Debugging

CONFIG_USER_STACKTRACE_SUPPORT=y
CONFIG_HAVE_RETHOOK=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_RETVAL=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=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_HAVE_SAMPLE_FTRACE_DIRECT=y
CONFIG_HAVE_SAMPLE_FTRACE_DIRECT_MULTI=y

#
# loongarch Debugging
#
# CONFIG_UNWINDER_GUESS is not set
CONFIG_UNWINDER_PROLOGUE=y
# CONFIG_UNWINDER_ORC is not set
# end of loongarch Debugging

#
# Kernel Testing and Coverage
#
# CONFIG_KUNIT 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
# end of Kernel Testing and Coverage

#
# Rust hacking
#
# end of Rust hacking
# end of Kernel hacking

Re: [PATCH] LoongArch: Update the flush cache policy

Posted by Xi Ruoyao 1 year, 7 months ago

On Mon, 2024-05-06 at 17:24 +0800, Li Jun wrote:
> fix when LoongArch s3 resume, Can't find image information
> 
> Signed-off-by: Li Jun <lijun01@kylinos.cn>
> Signed-off-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
> Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
> Signed-off-by: Biao Dong <dongbiao@loongson.cn>
> ---
>  arch/loongarch/mm/cache.c | 24 +++++++++++++++++++++++-
>  1 file changed, 23 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/loongarch/mm/cache.c b/arch/loongarch/mm/cache.c
> index 6be04d36ca07..52872fa0e5d8 100644
> --- a/arch/loongarch/mm/cache.c
> +++ b/arch/loongarch/mm/cache.c
> @@ -63,6 +63,28 @@ static void flush_cache_leaf(unsigned int leaf)
>  	} while (--nr_nodes > 0);
>  }
>  
> +static void flush_cache_last_level(unsigned int leaf)
> +{
> +	u64 addr;
> +	int i, j, nr_nodes, way_size;
> +	struct cache_desc *cdesc = current_cpu_data.cache_leaves +
> leaf;
> +
> +	nr_nodes = loongson_sysconf.nr_nodes;
> +
> +	addr = CSR_DMW1_BASE;
> +	iocsr_write32(0x1, 0x280);
> +	way_size = cdesc->sets * cdesc->linesz;
> +	do {
> +		for (i = 0; i < (cdesc->ways * 3); i++) {
> +			for (j = 0; j < (cdesc->sets); j++) {
> +				*(volatile u32 *)addr;

??? what does this line do?

-- 
Xi Ruoyao <xry111@xry111.site>
School of Aerospace Science and Technology, Xidian University

Re: [PATCH] LoongArch: Update the flush cache policy

Posted by lijun 1 year, 7 months ago

volatile prevents compiler optimization by allowing the compiler

  to reread the address value of addr every time

在 2024/5/6 17:28, Xi Ruoyao 写道:
> On Mon, 2024-05-06 at 17:24 +0800, Li Jun wrote:
>> fix when LoongArch s3 resume, Can't find image information
>>
>> Signed-off-by: Li Jun <lijun01@kylinos.cn>
>> Signed-off-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
>> Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
>> Signed-off-by: Biao Dong <dongbiao@loongson.cn>
>> ---
>>   arch/loongarch/mm/cache.c | 24 +++++++++++++++++++++++-
>>   1 file changed, 23 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/loongarch/mm/cache.c b/arch/loongarch/mm/cache.c
>> index 6be04d36ca07..52872fa0e5d8 100644
>> --- a/arch/loongarch/mm/cache.c
>> +++ b/arch/loongarch/mm/cache.c
>> @@ -63,6 +63,28 @@ static void flush_cache_leaf(unsigned int leaf)
>>   	} while (--nr_nodes > 0);
>>   }
>>   
>> +static void flush_cache_last_level(unsigned int leaf)
>> +{
>> +	u64 addr;
>> +	int i, j, nr_nodes, way_size;
>> +	struct cache_desc *cdesc = current_cpu_data.cache_leaves +
>> leaf;
>> +
>> +	nr_nodes = loongson_sysconf.nr_nodes;
>> +
>> +	addr = CSR_DMW1_BASE;
>> +	iocsr_write32(0x1, 0x280);
>> +	way_size = cdesc->sets * cdesc->linesz;
>> +	do {
>> +		for (i = 0; i < (cdesc->ways * 3); i++) {
>> +			for (j = 0; j < (cdesc->sets); j++) {
>> +				*(volatile u32 *)addr;
> ??? what does this line do?
>

Re: [PATCH] LoongArch: Update the flush cache policy

Posted by Xi Ruoyao 1 year, 7 months ago

On Mon, 2024-05-06 at 18:08 +0800, lijun wrote:
> volatile prevents compiler optimization by allowing the compiler
> 
>   to reread the address value of addr every time

But why is this ever needed?  What's wrong if the compiler optimizes it?

If the problem is the compiler may optimize it to cdesc->ways * 3 *
cdesc->sets * cdesc->linesz, unknowing cdesc->ways etc may magically
change, you should use READ_ONCE(cdesc->ways) etc.

I.e. use READ_ONCE on the expression which may magically change, instead
of hacking addr.  addr won't magically change.

> 在 2024/5/6 17:28, Xi Ruoyao 写道:
> > On Mon, 2024-05-06 at 17:24 +0800, Li Jun wrote:
> > > fix when LoongArch s3 resume, Can't find image information
> > > 
> > > Signed-off-by: Li Jun <lijun01@kylinos.cn>
> > > Signed-off-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
> > > Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
> > > Signed-off-by: Biao Dong <dongbiao@loongson.cn>
> > > ---
> > >   arch/loongarch/mm/cache.c | 24 +++++++++++++++++++++++-
> > >   1 file changed, 23 insertions(+), 1 deletion(-)
> > > 
> > > diff --git a/arch/loongarch/mm/cache.c b/arch/loongarch/mm/cache.c
> > > index 6be04d36ca07..52872fa0e5d8 100644
> > > --- a/arch/loongarch/mm/cache.c
> > > +++ b/arch/loongarch/mm/cache.c
> > > @@ -63,6 +63,28 @@ static void flush_cache_leaf(unsigned int leaf)
> > >   	} while (--nr_nodes > 0);
> > >   }
> > >   
> > > +static void flush_cache_last_level(unsigned int leaf)
> > > +{
> > > +	u64 addr;
> > > +	int i, j, nr_nodes, way_size;
> > > +	struct cache_desc *cdesc = current_cpu_data.cache_leaves
> > > +
> > > leaf;
> > > +
> > > +	nr_nodes = loongson_sysconf.nr_nodes;
> > > +
> > > +	addr = CSR_DMW1_BASE;
> > > +	iocsr_write32(0x1, 0x280);
> > > +	way_size = cdesc->sets * cdesc->linesz;
> > > +	do {
> > > +		for (i = 0; i < (cdesc->ways * 3); i++) {
> > > +			for (j = 0; j < (cdesc->sets); j++) {
> > > +				*(volatile u32 *)addr;
> > ??? what does this line do?
> > 
> 

-- 
Xi Ruoyao <xry111@xry111.site>
School of Aerospace Science and Technology, Xidian University

Re: [PATCH] LoongArch: Update the flush cache policy

Posted by lijun 1 year, 7 months ago

The value of addr changes very very quickly, and 'volatile' ensures that 
every change can be read

在 2024/5/6 18:17, Xi Ruoyao 写道:
> On Mon, 2024-05-06 at 18:08 +0800, lijun wrote:
>> volatile prevents compiler optimization by allowing the compiler
>>
>>    to reread the address value of addr every time
> But why is this ever needed?  What's wrong if the compiler optimizes it?
>
> If the problem is the compiler may optimize it to cdesc->ways * 3 *
> cdesc->sets * cdesc->linesz, unknowing cdesc->ways etc may magically
> change, you should use READ_ONCE(cdesc->ways) etc.
>
> I.e. use READ_ONCE on the expression which may magically change, instead
> of hacking addr.  addr won't magically change.
>
>> 在 2024/5/6 17:28, Xi Ruoyao 写道:
>>> On Mon, 2024-05-06 at 17:24 +0800, Li Jun wrote:
>>>> fix when LoongArch s3 resume, Can't find image information
>>>>
>>>> Signed-off-by: Li Jun <lijun01@kylinos.cn>
>>>> Signed-off-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
>>>> Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
>>>> Signed-off-by: Biao Dong <dongbiao@loongson.cn>
>>>> ---
>>>>    arch/loongarch/mm/cache.c | 24 +++++++++++++++++++++++-
>>>>    1 file changed, 23 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/arch/loongarch/mm/cache.c b/arch/loongarch/mm/cache.c
>>>> index 6be04d36ca07..52872fa0e5d8 100644
>>>> --- a/arch/loongarch/mm/cache.c
>>>> +++ b/arch/loongarch/mm/cache.c
>>>> @@ -63,6 +63,28 @@ static void flush_cache_leaf(unsigned int leaf)
>>>>    	} while (--nr_nodes > 0);
>>>>    }
>>>>    
>>>> +static void flush_cache_last_level(unsigned int leaf)
>>>> +{
>>>> +	u64 addr;
>>>> +	int i, j, nr_nodes, way_size;
>>>> +	struct cache_desc *cdesc = current_cpu_data.cache_leaves
>>>> +
>>>> leaf;
>>>> +
>>>> +	nr_nodes = loongson_sysconf.nr_nodes;
>>>> +
>>>> +	addr = CSR_DMW1_BASE;
>>>> +	iocsr_write32(0x1, 0x280);
>>>> +	way_size = cdesc->sets * cdesc->linesz;
>>>> +	do {
>>>> +		for (i = 0; i < (cdesc->ways * 3); i++) {
>>>> +			for (j = 0; j < (cdesc->sets); j++) {
>>>> +				*(volatile u32 *)addr;
>>> ??? what does this line do?
>>>

Re: [PATCH] LoongArch: Update the flush cache policy

Posted by Xi Ruoyao 1 year, 7 months ago

On Tue, 2024-05-07 at 08:53 +0800, lijun wrote:
> The value of addr changes very very quickly, and 'volatile' ensures that 
> every change can be read

No, volatile has nothing to do with changing quickly or not.

It's only useful when the compiler cannot know the change, for example
it's changed by the hardware or another thread.

And in the Linux kernel memory model for the hardware change you should
use READ_ONCE/WRITE_ONCE instead (they are actually wrappers of volatile
so in the kernel you should almost never need to directly use volatile),
for the change from another thread using volatile is just wrong and you
should use some atomic or locked operation instead.

See
https://www.kernel.org/doc/html/latest/process/volatile-considered-harmful.html.

In this case I'd like to ask first: why won't a simple addr += cdesc-
>linesz * cdesc->sets * cdesc->ways * 3 work?  Which value(s) of addr,
cdesc, or cdesc->{linesz,sets,ways} may change w/o the compiler's
knowledge?

> 在 2024/5/6 18:17, Xi Ruoyao 写道:
> > On Mon, 2024-05-06 at 18:08 +0800, lijun wrote:
> > > volatile prevents compiler optimization by allowing the compiler
> > > 
> > >    to reread the address value of addr every time
> > But why is this ever needed?  What's wrong if the compiler optimizes
> > it?
> > 
> > If the problem is the compiler may optimize it to cdesc->ways * 3 *
> > cdesc->sets * cdesc->linesz, unknowing cdesc->ways etc may magically
> > change, you should use READ_ONCE(cdesc->ways) etc.
> > 
> > I.e. use READ_ONCE on the expression which may magically change,
> > instead
> > of hacking addr.  addr won't magically change.
> > 
> > > 在 2024/5/6 17:28, Xi Ruoyao 写道:
> > > > On Mon, 2024-05-06 at 17:24 +0800, Li Jun wrote:
> > > > > fix when LoongArch s3 resume, Can't find image information
> > > > > 
> > > > > Signed-off-by: Li Jun <lijun01@kylinos.cn>
> > > > > Signed-off-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
> > > > > Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
> > > > > Signed-off-by: Biao Dong <dongbiao@loongson.cn>
> > > > > ---
> > > > >    arch/loongarch/mm/cache.c | 24 +++++++++++++++++++++++-
> > > > >    1 file changed, 23 insertions(+), 1 deletion(-)
> > > > > 
> > > > > diff --git a/arch/loongarch/mm/cache.c
> > > > > b/arch/loongarch/mm/cache.c
> > > > > index 6be04d36ca07..52872fa0e5d8 100644
> > > > > --- a/arch/loongarch/mm/cache.c
> > > > > +++ b/arch/loongarch/mm/cache.c
> > > > > @@ -63,6 +63,28 @@ static void flush_cache_leaf(unsigned int
> > > > > leaf)
> > > > >    	} while (--nr_nodes > 0);
> > > > >    }
> > > > >    
> > > > > +static void flush_cache_last_level(unsigned int leaf)
> > > > > +{
> > > > > +	u64 addr;
> > > > > +	int i, j, nr_nodes, way_size;
> > > > > +	struct cache_desc *cdesc =
> > > > > current_cpu_data.cache_leaves
> > > > > +
> > > > > leaf;
> > > > > +
> > > > > +	nr_nodes = loongson_sysconf.nr_nodes;
> > > > > +
> > > > > +	addr = CSR_DMW1_BASE;
> > > > > +	iocsr_write32(0x1, 0x280);
> > > > > +	way_size = cdesc->sets * cdesc->linesz;
> > > > > +	do {
> > > > > +		for (i = 0; i < (cdesc->ways * 3); i++) {
> > > > > +			for (j = 0; j < (cdesc->sets); j++) {
> > > > > +				*(volatile u32 *)addr;
> > > > ??? what does this line do?
> > > > 
> 

-- 
Xi Ruoyao <xry111@xry111.site>
School of Aerospace Science and Technology, Xidian University

Re: [PATCH] LoongArch: Update the flush cache policy

Posted by lijun 1 year, 7 months ago

I guess, final the value of addr is not important, just all of addr must 
read once is very important,

so use two 'for()' and 'volatile' to flush all of addr  's cache, 
exactly as the name of the function is

"flush_cache_last_level".

在 2024/5/7 11:55, Xi Ruoyao 写道:
> On Tue, 2024-05-07 at 08:53 +0800, lijun wrote:
>> The value of addr changes very very quickly, and 'volatile' ensures that
>> every change can be read
> No, volatile has nothing to do with changing quickly or not.
>
> It's only useful when the compiler cannot know the change, for example
> it's changed by the hardware or another thread.
>
> And in the Linux kernel memory model for the hardware change you should
> use READ_ONCE/WRITE_ONCE instead (they are actually wrappers of volatile
> so in the kernel you should almost never need to directly use volatile),
> for the change from another thread using volatile is just wrong and you
> should use some atomic or locked operation instead.
>
> See
> https://www.kernel.org/doc/html/latest/process/volatile-considered-harmful.html.
>
> In this case I'd like to ask first: why won't a simple addr += cdesc-
>> linesz * cdesc->sets * cdesc->ways * 3 work?  Which value(s) of addr,
> cdesc, or cdesc->{linesz,sets,ways} may change w/o the compiler's
> knowledge?
>
>> 在 2024/5/6 18:17, Xi Ruoyao 写道:
>>> On Mon, 2024-05-06 at 18:08 +0800, lijun wrote:
>>>> volatile prevents compiler optimization by allowing the compiler
>>>>
>>>>     to reread the address value of addr every time
>>> But why is this ever needed?  What's wrong if the compiler optimizes
>>> it?
>>>
>>> If the problem is the compiler may optimize it to cdesc->ways * 3 *
>>> cdesc->sets * cdesc->linesz, unknowing cdesc->ways etc may magically
>>> change, you should use READ_ONCE(cdesc->ways) etc.
>>>
>>> I.e. use READ_ONCE on the expression which may magically change,
>>> instead
>>> of hacking addr.  addr won't magically change.
>>>
>>>> 在 2024/5/6 17:28, Xi Ruoyao 写道:
>>>>> On Mon, 2024-05-06 at 17:24 +0800, Li Jun wrote:
>>>>>> fix when LoongArch s3 resume, Can't find image information
>>>>>>
>>>>>> Signed-off-by: Li Jun <lijun01@kylinos.cn>
>>>>>> Signed-off-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
>>>>>> Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
>>>>>> Signed-off-by: Biao Dong <dongbiao@loongson.cn>
>>>>>> ---
>>>>>>     arch/loongarch/mm/cache.c | 24 +++++++++++++++++++++++-
>>>>>>     1 file changed, 23 insertions(+), 1 deletion(-)
>>>>>>
>>>>>> diff --git a/arch/loongarch/mm/cache.c
>>>>>> b/arch/loongarch/mm/cache.c
>>>>>> index 6be04d36ca07..52872fa0e5d8 100644
>>>>>> --- a/arch/loongarch/mm/cache.c
>>>>>> +++ b/arch/loongarch/mm/cache.c
>>>>>> @@ -63,6 +63,28 @@ static void flush_cache_leaf(unsigned int
>>>>>> leaf)
>>>>>>     	} while (--nr_nodes > 0);
>>>>>>     }
>>>>>>     
>>>>>> +static void flush_cache_last_level(unsigned int leaf)
>>>>>> +{
>>>>>> +	u64 addr;
>>>>>> +	int i, j, nr_nodes, way_size;
>>>>>> +	struct cache_desc *cdesc =
>>>>>> current_cpu_data.cache_leaves
>>>>>> +
>>>>>> leaf;
>>>>>> +
>>>>>> +	nr_nodes = loongson_sysconf.nr_nodes;
>>>>>> +
>>>>>> +	addr = CSR_DMW1_BASE;
>>>>>> +	iocsr_write32(0x1, 0x280);
>>>>>> +	way_size = cdesc->sets * cdesc->linesz;
>>>>>> +	do {
>>>>>> +		for (i = 0; i < (cdesc->ways * 3); i++) {
>>>>>> +			for (j = 0; j < (cdesc->sets); j++) {
>>>>>> +				*(volatile u32 *)addr;
>>>>> ??? what does this line do?
>>>>>

Re: [PATCH] LoongArch: Update the flush cache policy

Posted by Xi Ruoyao 1 year, 7 months ago

On Tue, 2024-05-07 at 14:38 +0800, lijun wrote:
> I guess, final the value of addr is not important, just all of addr must 
> read once is very important,
> 
> so use two 'for()' and 'volatile' to flush all of addr  's cache, 
> exactly as the name of the function is
> 
> "flush_cache_last_level".

AFAIK do a read does not mean flushing the cache.  The cacop instruction
is intended to do the cache flushing.

So why the cacop instruction in flush_cache_leaf is not enough to flush
it?  Is there something wrong in flush_cache_leaf?  It currently reads:

static void flush_cache_leaf(unsigned int leaf)
{
    int i, j, nr_nodes;
    uint64_t addr = CSR_DMW0_BASE;
    struct cache_desc *cdesc = current_cpu_data.cache_leaves + leaf;

    nr_nodes = cache_private(cdesc) ? 1 : loongson_sysconf.nr_nodes;

    do {
        for (i = 0; i < cdesc->sets; i++) {
            for (j = 0; j < cdesc->ways; j++) {
                flush_cache_line(leaf, addr);
                addr++;
            }

            addr -= cdesc->ways;
            addr += cdesc->linesz;
        }
        addr += (1ULL << NODE_ADDRSPACE_SHIFT);
    } while (--nr_nodes > 0); 
}

There is something bizarre: the flush_cache_line function uses the cacop
instruction in the Index Invalidate / Invalidate and Writeback mode, and
if I read the LoongArch manual correctly in this mode CSR_DMW0_BASE and
1ULL << NODE_ADDRSPACE_SHIFT are just ignored.

Is this something undocumented or flush_cache_leaf is just "incorrect"?

-- 
Xi Ruoyao <xry111@xry111.site>
School of Aerospace Science and Technology, Xidian University