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

[Michael Ellerman]

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/
> 
> 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