src-test2/sys/powerpc/include, branch master

[PowerPC] Floating-point exception trap followup

2020-12-13T03:58:43Z

* Fix incorrect operation on 32-bit caused by incorrectly-sized storage for a temporary FPSCR. * Fix several whitespace problems. * Don't try to enable VSX during cleanup_fpscr(). Reviewed by: alfredo, jhibbits (earlier version) Sponsored by: Tag1 Consulting, Inc. Differential Revision: https://reviews.freebsd.org/D27453

Add CFI start/end proc directives to arm64, i386, and ppc

2020-12-05T00:33:28Z

Follow-up to r353959 and r368070: do the same for other architectures. arm32 already seems to use its own .fnstart/.fnend directives, which appear to be ARM-specific variants of the same thing. Likewise, MIPS uses .frame directives. Reviewed by: arichardson Differential Revision: https://reviews.freebsd.org/D27387

[PowerPC64LE] Fix LE VSX/fpr interop

2020-12-03T01:39:59Z

In the PCB struct, we need to match the VSX register file layout correctly, as the VSRs shadow the FPRs. In LE, we need to have a dword of padding before the fprs so they end up on the correct side, as the struct may be manipulated by either the FP routines or the VSX routines. Additionally, when saving and restoring fprs, we need to explicitly target the fpr union member so it gets offset correctly on LE. Fixes weirdness with FP registers in VSX-using programs (A FPR that was saved by the FP routines but restored by the VSX routines was becoming 0 due to being loaded to the wrong side of the VSR.) Original patch by jhibbits. Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D27431

[PowerPC] Don't overwrite vm.pmap sysctl node

2020-11-17T11:36:31Z

After r367417, both mmu_oea64 and mmu_radix were defining the vm.pmap sysctl node, resulting in the later definition hiding the properties of the previous one. Avoid this issue by defining vm.pmap in a common source file and declaring it where needed. This change also standardizes the tunable name used to enable superpages and change its default to disabled on radix MMU, because it still has some issues with superpages. Reviewed by: bdragon, jhibbits Sponsored by: Eldorado Research Institute (eldorado.org.br) Differential Revision: https://reviews.freebsd.org/D27156

Make powerpc use MAXARGS (defined as 8) instead of hardcoding '10'.

2020-11-06T19:27:27Z

This brings its 'struct syscall_args' in sync with other architectures. Reviewed by: bdragon, jhibbits MFC after: 2 weeks Sponsored by: EPSRC Differential Revision: https://reviews.freebsd.org/D26605

Implement superpages for PowerPC64 (HPT)

2020-11-06T14:12:45Z

This change adds support for transparent superpages for PowerPC64 systems using Hashed Page Tables (HPT). All pmap operations are supported. The changes were inspired by RISC-V implementation of superpages, by @markj (r344106), but heavily adapted to fit PPC64 HPT architecture and existing MMU OEA64 code. While these changes are not better tested, superpages support is disabled by default. To enable it, use vm.pmap.superpages_enabled=1. In this initial implementation, when superpages are disabled, system performance stays at the same level as without these changes. When superpages are enabled, buildworld time increases a bit (~2%). However, for workloads that put a heavy pressure on the TLB the performance boost is much bigger (see HPC Challenge and pgbench on D25237). Reviewed by: jhibbits Sponsored by: Eldorado Research Institute (eldorado.org.br) Differential Revision: https://reviews.freebsd.org/D25237

[POWERPC] Floating-Point Exception trap support

2020-11-06T13:34:30Z

Add support for Floating-Point Exception traps on 32 and 64 bit platforms. Also make sure to clean FPSCR on EXEC and thread exit Author of initial version: Renato Riolino Reviewed by: jhibbits Sponsored by: Eldorado Research Institute (eldorado.org.br) Differential Revision: https://reviews.freebsd.org/D23623

Fix powerpc and powerpcspe builds

2020-11-05T20:18:00Z

This change fixes 32-bit PowerPC builds, that r367390 broke (shift count >= width of type).

[PowerPC] hwpmc: add support for POWER8/9 PMCs

2020-11-05T16:36:39Z

This change adds support for POWER8 and POWER9 PMCs (bare metal and pseries). All PowerISA 2.07B non-random events are supported. Implementation was based on that of PPC970. Reviewed by: jhibbits Sponsored by: Eldorado Research Institute (eldorado.org.br) Differential Revision: https://reviews.freebsd.org/D26110

[PowerPC] Make PPC 970 PMC SPRs the standard ones

2020-11-05T14:15:50Z

And add a _74XX suffix to 74XX SPRs. This is a preparation for adding support to POWER8/9 PMCs, which have most SPRs equal to 970 ones. Reviewed by: jhibbits Sponsored by: Eldorado Research Institute (eldorado.org.br) Differential Revision: https://reviews.freebsd.org/D26532