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Documentation: Drop or replace remaining mentions of IA64
Drop or update mentions of IA64, as appropriate. Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
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Ard Biesheuvel
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944834901a
@ -354,9 +354,6 @@ Description: Parameters for the CPU cache attributes
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- ReadWriteAllocate:
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both writeallocate and readallocate
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attributes:
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LEGACY used only on IA64 and is same as write_policy
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coherency_line_size:
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the minimum amount of data in bytes that gets
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transferred from memory to cache
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@ -2,7 +2,7 @@ What: /sys/firmware/dmi/entries/
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Date: February 2011
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Contact: Mike Waychison <mikew@google.com>
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Description:
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Many machines' firmware (x86 and ia64) export DMI /
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Many machines' firmware (x86 and arm64) export DMI /
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SMBIOS tables to the operating system. Getting at this
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information is often valuable to userland, especially in
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cases where there are OEM extensions used.
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@ -17,7 +17,7 @@ You can use common commands, such as cp, scp or makedumpfile to copy
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the memory image to a dump file on the local disk, or across the network
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to a remote system.
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Kdump and kexec are currently supported on the x86, x86_64, ppc64, ia64,
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Kdump and kexec are currently supported on the x86, x86_64, ppc64,
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s390x, arm and arm64 architectures.
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When the system kernel boots, it reserves a small section of memory for
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@ -113,7 +113,7 @@ There are two possible methods of using Kdump.
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2) Or use the system kernel binary itself as dump-capture kernel and there is
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no need to build a separate dump-capture kernel. This is possible
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only with the architectures which support a relocatable kernel. As
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of today, i386, x86_64, ppc64, ia64, arm and arm64 architectures support
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of today, i386, x86_64, ppc64, arm and arm64 architectures support
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relocatable kernel.
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Building a relocatable kernel is advantageous from the point of view that
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@ -236,24 +236,6 @@ Dump-capture kernel config options (Arch Dependent, ppc64)
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Make and install the kernel and its modules.
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Dump-capture kernel config options (Arch Dependent, ia64)
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----------------------------------------------------------
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- No specific options are required to create a dump-capture kernel
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for ia64, other than those specified in the arch independent section
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above. This means that it is possible to use the system kernel
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as a dump-capture kernel if desired.
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The crashkernel region can be automatically placed by the system
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kernel at runtime. This is done by specifying the base address as 0,
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or omitting it all together::
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crashkernel=256M@0
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or::
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crashkernel=256M
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Dump-capture kernel config options (Arch Dependent, arm)
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----------------------------------------------------------
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@ -348,11 +330,6 @@ Boot into System Kernel
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On ppc64, use "crashkernel=128M@32M".
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On ia64, 256M@256M is a generous value that typically works.
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The region may be automatically placed on ia64, see the
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dump-capture kernel config option notes above.
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If use sparse memory, the size should be rounded to GRANULE boundaries.
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On s390x, typically use "crashkernel=xxM". The value of xx is dependent
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on the memory consumption of the kdump system. In general this is not
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dependent on the memory size of the production system.
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@ -383,10 +360,6 @@ For ppc64:
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- Use vmlinux
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For ia64:
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- Use vmlinux or vmlinuz.gz
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For s390x:
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- Use image or bzImage
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@ -428,14 +401,10 @@ to load dump-capture kernel::
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--initrd=<initrd-for-dump-capture-kernel> \
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--append="root=<root-dev> <arch-specific-options>"
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Please note, that --args-linux does not need to be specified for ia64.
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It is planned to make this a no-op on that architecture, but for now
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it should be omitted
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Following are the arch specific command line options to be used while
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loading dump-capture kernel.
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For i386, x86_64 and ia64:
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For i386 and x86_64:
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"1 irqpoll nr_cpus=1 reset_devices"
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@ -413,36 +413,6 @@ of a higher page table lookup overhead, and also consumes more page
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table space per process. Used to check whether PAE was enabled in the
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crash kernel when converting virtual addresses to physical addresses.
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ia64
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====
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pgdat_list|(pgdat_list, MAX_NUMNODES)
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-------------------------------------
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pg_data_t array storing all NUMA nodes information. MAX_NUMNODES
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indicates the number of the nodes.
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node_memblk|(node_memblk, NR_NODE_MEMBLKS)
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------------------------------------------
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List of node memory chunks. Filled when parsing the SRAT table to obtain
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information about memory nodes. NR_NODE_MEMBLKS indicates the number of
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node memory chunks.
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These values are used to compute the number of nodes the crashed kernel used.
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node_memblk_s|(node_memblk_s, start_paddr)|(node_memblk_s, size)
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----------------------------------------------------------------
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The size of a struct node_memblk_s and the offsets of the
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node_memblk_s's members. Used to compute the number of nodes.
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PGTABLE_3|PGTABLE_4
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-------------------
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User-space tools need to know whether the crash kernel was in 3-level or
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4-level paging mode. Used to distinguish the page table.
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ARM64
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=====
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@ -1449,7 +1449,7 @@
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See comment before function elanfreq_setup() in
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arch/x86/kernel/cpu/cpufreq/elanfreq.c.
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elfcorehdr=[size[KMG]@]offset[KMG] [IA64,PPC,SH,X86,S390]
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elfcorehdr=[size[KMG]@]offset[KMG] [PPC,SH,X86,S390]
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Specifies physical address of start of kernel core
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image elf header and optionally the size. Generally
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kexec loader will pass this option to capture kernel.
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@ -1512,12 +1512,6 @@
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floppy= [HW]
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See Documentation/admin-guide/blockdev/floppy.rst.
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force_pal_cache_flush
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[IA-64] Avoid check_sal_cache_flush which may hang on
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buggy SAL_CACHE_FLUSH implementations. Using this
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parameter will force ia64_sal_cache_flush to call
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ia64_pal_cache_flush instead of SAL_CACHE_FLUSH.
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forcepae [X86-32]
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Forcefully enable Physical Address Extension (PAE).
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Many Pentium M systems disable PAE but may have a
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@ -33,7 +33,7 @@ used to expose persistent memory, other performance-differentiated memory and
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reserved memory regions as ordinary system RAM to Linux.
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Linux only supports memory hot(un)plug on selected 64 bit architectures, such as
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x86_64, arm64, ppc64, s390x and ia64.
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x86_64, arm64, ppc64 and s390x.
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Memory Hot(Un)Plug Granularity
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------------------------------
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@ -436,7 +436,7 @@ ignore-unaligned-usertrap
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On architectures where unaligned accesses cause traps, and where this
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feature is supported (``CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN``;
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currently, ``arc``, ``ia64`` and ``loongarch``), controls whether all
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currently, ``arc`` and ``loongarch``), controls whether all
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unaligned traps are logged.
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= =============================================================
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@ -445,10 +445,7 @@ unaligned traps are logged.
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setting.
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= =============================================================
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See also `unaligned-trap`_ and `unaligned-dump-stack`_. On ``ia64``,
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this allows system administrators to override the
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``IA64_THREAD_UAC_NOPRINT`` ``prctl`` and avoid logs being flooded.
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See also `unaligned-trap`_.
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io_uring_disabled
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=================
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@ -1538,22 +1535,6 @@ See Documentation/admin-guide/kernel-parameters.rst and
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Documentation/trace/boottime-trace.rst.
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.. _unaligned-dump-stack:
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unaligned-dump-stack (ia64)
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===========================
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When logging unaligned accesses, controls whether the stack is
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dumped.
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= ===================================================
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0 Do not dump the stack. This is the default setting.
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1 Dump the stack.
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= ===================================================
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See also `ignore-unaligned-usertrap`_.
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unaligned-trap
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==============
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@ -12,7 +12,6 @@ implementation.
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arc/index
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arm/index
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arm64/index
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ia64/index
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loongarch/index
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m68k/index
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mips/index
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@ -80,9 +80,6 @@ ionice.c tool::
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#elif defined(__x86_64__)
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#define __NR_ioprio_set 251
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#define __NR_ioprio_get 252
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#elif defined(__ia64__)
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#define __NR_ioprio_set 1274
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#define __NR_ioprio_get 1275
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#else
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#error "Unsupported arch"
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#endif
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@ -23,9 +23,9 @@ Retrieving a full system memory dump is also possible over the FireWire,
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using data transfer rates in the order of 10MB/s or more.
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With most FireWire controllers, memory access is limited to the low 4 GB
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of physical address space. This can be a problem on IA64 machines where
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memory is located mostly above that limit, but it is rarely a problem on
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more common hardware such as x86, x86-64 and PowerPC.
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of physical address space. This can be a problem on machines where memory is
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located mostly above that limit, but it is rarely a problem on more common
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hardware such as x86, x86-64 and PowerPC.
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At least LSI FW643e and FW643e2 controllers are known to support access to
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physical addresses above 4 GB, but this feature is currently not enabled by
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@ -53,7 +53,7 @@ knowledge about the kernel Makefiles, plus detailed knowledge about the
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public interface for kbuild.
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*Arch developers* are people who work on an entire architecture, such
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as sparc or ia64. Arch developers need to know about the arch Makefile
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as sparc or x86. Arch developers need to know about the arch Makefile
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as well as kbuild Makefiles.
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*Kbuild developers* are people who work on the kernel build system itself.
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@ -64,8 +64,8 @@ c. Multi-buffer receive mode. Scattering of packet across multiple
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IBM xSeries).
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d. MSI/MSI-X. Can be enabled on platforms which support this feature
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(IA64, Xeon) resulting in noticeable performance improvement(up to 7%
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on certain platforms).
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resulting in noticeable performance improvement (up to 7% on certain
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platforms).
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e. Statistics. Comprehensive MAC-level and software statistics displayed
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using "ethtool -S" option.
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@ -10,7 +10,7 @@ Context switch
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By default, the switch_to arch function is called with the runqueue
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locked. This is usually not a problem unless switch_to may need to
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take the runqueue lock. This is usually due to a wake up operation in
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the context switch. See arch/ia64/include/asm/switch_to.h for an example.
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the context switch.
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To request the scheduler call switch_to with the runqueue unlocked,
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you must `#define __ARCH_WANT_UNLOCKED_CTXSW` in a header file
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@ -68,7 +68,5 @@ Possible arch/ problems
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Possible arch problems I found (and either tried to fix or didn't):
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ia64 - is safe_halt call racy vs interrupts? (does it sleep?) (See #4a)
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sparc - IRQs on at this point(?), change local_irq_save to _disable.
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- TODO: needs secondary CPUs to disable preempt (See #1)
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@ -315,7 +315,6 @@ architectures:
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- i386 (Supports jump optimization)
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- x86_64 (AMD-64, EM64T) (Supports jump optimization)
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- ppc64
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- ia64 (Does not support probes on instruction slot1.)
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- sparc64 (Return probes not yet implemented.)
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- arm
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- ppc
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@ -18,7 +18,6 @@
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TODOList:
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* arm/index
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* ia64/index
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* m68k/index
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* nios2/index
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* powerpc/index
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@ -49,12 +49,6 @@ CPU热拔插支持的一个更新颖的用途是它在SMP的暂停恢复支持
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限制内核将支持的CPU总量。如果这里提供的数量低于实际可用的CPU数量，那么其他CPU
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以后就不能上线了。
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``additional_cpus=n``
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使用它来限制可热插拔的CPU。该选项设置
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``cpu_possible_mask = cpu_present_mask + additional_cpus``
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这个选项只限于IA64架构。
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``possible_cpus=n``
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这个选项设置 ``cpu_possible_mask`` 中的 ``possible_cpus`` 位。
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@ -20,8 +20,7 @@
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==========
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1. 运行队列锁
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默认情况下，switch_to arch函数在调用时锁定了运行队列。这通常不是一个问题，除非
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switch_to可能需要获取运行队列锁。这通常是由于上下文切换中的唤醒操作造成的。见
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arch/ia64/include/asm/switch_to.h的例子。
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switch_to可能需要获取运行队列锁。这通常是由于上下文切换中的唤醒操作造成的。
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为了要求调度器在运行队列解锁的情况下调用switch_to，你必须在头文件
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中`#define __ARCH_WANT_UNLOCKED_CTXSW`(通常是定义switch_to的那个文件）。
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@ -68,7 +67,5 @@ arch/x86/kernel/process.c有轮询和睡眠空闲函数的例子。
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我发现的可能的arch问题（并试图解决或没有解决）。:
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ia64 - safe_halt的调用与中断相比，是否很荒谬？ (它睡眠了吗) (参考 #4a)
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sparc - 在这一点上，IRQ是开着的（？），把local_irq_save改为_disable。
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- 待办事项: 需要第二个CPU来禁用抢占 (参考 #1)
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4
Makefile
4
Makefile
@ -378,7 +378,7 @@ include $(srctree)/scripts/subarch.include
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# When performing cross compilation for other architectures ARCH shall be set
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# to the target architecture. (See arch/* for the possibilities).
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# ARCH can be set during invocation of make:
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# make ARCH=ia64
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# make ARCH=arm64
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# Another way is to have ARCH set in the environment.
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# The default ARCH is the host where make is executed.
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@ -386,7 +386,7 @@ include $(srctree)/scripts/subarch.include
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# during compilation. Only gcc and related bin-utils executables
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# are prefixed with $(CROSS_COMPILE).
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# CROSS_COMPILE can be set on the command line
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# make CROSS_COMPILE=ia64-linux-
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# make CROSS_COMPILE=aarch64-linux-gnu-
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# Alternatively CROSS_COMPILE can be set in the environment.
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# Default value for CROSS_COMPILE is not to prefix executables
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# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
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