Re: [PATCH v6 00/25] powerpc: Syscall wrapper and register clearing

On Wed, 21 Sep 2022 16:55:40 +1000, Rohan McLure wrote:

V5 available here:

Link: https://lore.kernel.org/all/20220916053300.786330-2-rmclure@linux.ibm.com/T/ (local)

Implement a syscall wrapper, causing arguments to handlers to be passed
via a struct pt_regs on the stack. The syscall wrapper is implemented
for all platforms other than the Cell processor, from which SPUs expect
the ability to directly call syscall handler symbols with the regular
in-register calling convention.

[...]

Patches 1-18 & 20-21 applied to powerpc/next.

[01/25] powerpc: Remove asmlinkage from syscall handler definitions
        https://git.kernel.org/powerpc/c/5ba6c9a912fe4c60f84d6617ad10d2b8d7910990
[02/25] powerpc: Save caller r3 prior to system_call_exception
        https://git.kernel.org/powerpc/c/2c27d4a419f627636b8c6038e55acb26df05c391
[03/25] powerpc: Add ZEROIZE_GPRS macros for register clears
        https://git.kernel.org/powerpc/c/9d54a5ce3aa87810f13cd33b314097ac6d28c350
[04/25] powerpc/64s: Use {ZEROIZE,SAVE,REST}_GPRS macros in sc, scv 0 handlers
        https://git.kernel.org/powerpc/c/2b1dac4b5f97ea88fb01dfcab7fc24500b5dea95
[05/25] powerpc/32: Clarify interrupt restores with REST_GPR macro in entry_32.S
        https://git.kernel.org/powerpc/c/15ba74502ccfd0b34dad0ea022093ccc66b334d6
[06/25] powerpc/64e: Clarify register saves and clears with {SAVE,ZEROIZE}_GPRS
        https://git.kernel.org/powerpc/c/53ecaa6778d613807e590c320ccfcf48a4114108
[07/25] powerpc/64s: Fix comment on interrupt handler prologue
        https://git.kernel.org/powerpc/c/620f5c59c8617d623428c03414a022fca4e9eea2
[08/25] powerpc: Fix fallocate and fadvise64_64 compat parameter combination
        https://git.kernel.org/powerpc/c/016ff72bd2090903715c0f9422a44afbb966f4ee
[09/25] asm-generic: compat: Support BE for long long args in 32-bit ABIs
        https://git.kernel.org/powerpc/c/43d5de2b67d7f4a8478820005152f7f689608f2f
[10/25] powerpc: Use generic fallocate compatibility syscall
        https://git.kernel.org/powerpc/c/c2e7a19827eec443a7cbe85e8d959052412d6dc3
[11/25] powerpc/32: Remove powerpc select specialisation
        https://git.kernel.org/powerpc/c/b6b1334c9510e162bd8ca0ae58403cafad9572f1
[12/25] powerpc: Remove direct call to personality syscall handler
        https://git.kernel.org/powerpc/c/4df0221f9ded8c39aecfb1a80cef346026671cb7
[13/25] powerpc: Remove direct call to mmap2 syscall handlers
        https://git.kernel.org/powerpc/c/b7fa9ce86d32baf2a3a8bf8fdaa44870084edd85
[14/25] powerpc: Provide do_ppc64_personality helper
        https://git.kernel.org/powerpc/c/ac17defbeb4e8285c5b9752164b1d68b13bf3e3b
[15/25] powerpc: Adopt SYSCALL_DEFINE for arch-specific syscall handlers
        https://git.kernel.org/powerpc/c/dec20c50df79cadaff17e964ef7f622491a52134
[16/25] powerpc: Include all arch-specific syscall prototypes
        https://git.kernel.org/powerpc/c/8cd1def4b8e4a592949509fac443e850da8428d0
[17/25] powerpc: Enable compile-time check for syscall handlers
        https://git.kernel.org/powerpc/c/39859aea411b1696c6bc0c04bd2b5095ddba6196
[18/25] powerpc: Use common syscall handler type
        https://git.kernel.org/powerpc/c/8640de0dee49cec50040d9845a2bc96fd15adc9e
[20/25] powerpc: Change system_call_exception calling convention
        https://git.kernel.org/powerpc/c/f8971c627b14040e533768985a99f4fd6ffa420f
[21/25] powerpc: Provide syscall wrapper
        https://git.kernel.org/powerpc/c/7e92e01b724526b98cbc7f03dd4afa0295780d56

cheers