OpenCloudOS-Kernel/arch/x86
Linus Torvalds f1947d7c8a Random number generator fixes for Linux 6.1-rc1.
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Merge tag 'random-6.1-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random

Pull more random number generator updates from Jason Donenfeld:
 "This time with some large scale treewide cleanups.

  The intent of this pull is to clean up the way callers fetch random
  integers. The current rules for doing this right are:

   - If you want a secure or an insecure random u64, use get_random_u64()

   - If you want a secure or an insecure random u32, use get_random_u32()

     The old function prandom_u32() has been deprecated for a while
     now and is just a wrapper around get_random_u32(). Same for
     get_random_int().

   - If you want a secure or an insecure random u16, use get_random_u16()

   - If you want a secure or an insecure random u8, use get_random_u8()

   - If you want secure or insecure random bytes, use get_random_bytes().

     The old function prandom_bytes() has been deprecated for a while
     now and has long been a wrapper around get_random_bytes()

   - If you want a non-uniform random u32, u16, or u8 bounded by a
     certain open interval maximum, use prandom_u32_max()

     I say "non-uniform", because it doesn't do any rejection sampling
     or divisions. Hence, it stays within the prandom_*() namespace, not
     the get_random_*() namespace.

     I'm currently investigating a "uniform" function for 6.2. We'll see
     what comes of that.

  By applying these rules uniformly, we get several benefits:

   - By using prandom_u32_max() with an upper-bound that the compiler
     can prove at compile-time is ≤65536 or ≤256, internally
     get_random_u16() or get_random_u8() is used, which wastes fewer
     batched random bytes, and hence has higher throughput.

   - By using prandom_u32_max() instead of %, when the upper-bound is
     not a constant, division is still avoided, because
     prandom_u32_max() uses a faster multiplication-based trick instead.

   - By using get_random_u16() or get_random_u8() in cases where the
     return value is intended to indeed be a u16 or a u8, we waste fewer
     batched random bytes, and hence have higher throughput.

  This series was originally done by hand while I was on an airplane
  without Internet. Later, Kees and I worked on retroactively figuring
  out what could be done with Coccinelle and what had to be done
  manually, and then we split things up based on that.

  So while this touches a lot of files, the actual amount of code that's
  hand fiddled is comfortably small"

* tag 'random-6.1-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
  prandom: remove unused functions
  treewide: use get_random_bytes() when possible
  treewide: use get_random_u32() when possible
  treewide: use get_random_{u8,u16}() when possible, part 2
  treewide: use get_random_{u8,u16}() when possible, part 1
  treewide: use prandom_u32_max() when possible, part 2
  treewide: use prandom_u32_max() when possible, part 1
2022-10-16 15:27:07 -07:00
..
boot - Yu Zhao's Multi-Gen LRU patches are here. They've been under test in 2022-10-10 17:53:04 -07:00
coco x86/tdx: Handle load_unaligned_zeropad() page-cross to a shared page 2022-06-17 15:37:33 -07:00
configs x86/defconfig: Enable CONFIG_DEBUG_WX=y 2022-09-02 10:41:42 +02:00
crypto This update includes the following changes: 2022-10-10 13:04:25 -07:00
entry treewide: use prandom_u32_max() when possible, part 1 2022-10-11 17:42:55 -06:00
events Perf events updates for v6.1: 2022-10-10 09:27:46 -07:00
hyperv x86/hyperv: Replace kmap() with kmap_local_page() 2022-10-03 08:49:48 +00:00
ia32 x86: Remove a.out support 2022-04-11 18:04:27 +02:00
include - hfs and hfsplus kmap API modernization from Fabio Francesco 2022-10-12 11:00:22 -07:00
kernel treewide: use get_random_u32() when possible 2022-10-11 17:42:58 -06:00
kvm ARM: 2022-10-11 20:07:44 -07:00
lib - Yu Zhao's Multi-Gen LRU patches are here. They've been under test in 2022-10-10 17:53:04 -07:00
math-emu x86/32: Remove lazy GS macros 2022-04-14 14:09:43 +02:00
mm treewide: use prandom_u32_max() when possible, part 1 2022-10-11 17:42:55 -06:00
net Networking changes for 6.1. 2022-10-04 13:38:03 -07:00
pci x86/PCI: Revert "x86/PCI: Clip only host bridge windows for E820 regions" 2022-06-17 14:24:14 -05:00
platform EFI updates for v6.1 2022-10-09 08:56:54 -07:00
power x86/cpu: Load microcode during restore_processor_state() 2022-04-19 19:37:05 +02:00
purgatory x86/purgatory: Disable CFI 2022-09-26 10:13:16 -07:00
ras
realmode x86: kmsan: disable instrumentation of unsupported code 2022-10-03 14:03:24 -07:00
tools x86/tools/relocs: Ignore __kcfi_typeid_ relocations 2022-09-26 10:13:15 -07:00
um arch: um: Mark the stack non-executable to fix a binutils warning 2022-09-21 09:11:42 +02:00
video
virt/vmx/tdx x86/tdx: Provide common base for SEAMCALL and TDCALL C wrappers 2022-04-07 08:27:50 -07:00
xen xen: branch for v6.1-rc1 2022-10-12 14:39:38 -07:00
.gitignore x86/purgatory: Omit use of bin2c 2022-07-25 10:32:32 +02:00
Kbuild x86/cc: Move arch/x86/{kernel/cc_platform.c => coco/core.c} 2022-02-23 18:25:58 +01:00
Kconfig - Yu Zhao's Multi-Gen LRU patches are here. They've been under test in 2022-10-10 17:53:04 -07:00
Kconfig.assembler
Kconfig.cpu
Kconfig.debug arch: make TRACE_IRQFLAGS_NMI_SUPPORT generic 2022-06-23 15:39:21 +01:00
Makefile Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Makefile.um
Makefile_32.cpu