git: 0a45c8821d8e - stable/15 - powerpc: disable the TLBIE lock, it's not needed for POWER8

The branch stable/15 has been updated by adrian:

URL: https://cgit.FreeBSD.org/src/commit/?id=0a45c8821d8eb8c81c1090339c98aafec964f017

commit 0a45c8821d8eb8c81c1090339c98aafec964f017
Author:     Adrian Chadd <adrian@FreeBSD.org>
AuthorDate: 2026-01-23 07:36:00 +0000
Commit:     Adrian Chadd <adrian@FreeBSD.org>
CommitDate: 2026-01-30 05:03:15 +0000

    powerpc: disable the TLBIE lock, it's not needed for POWER8
    
    According to POWER8_UM_v1.3_16MAR2016 3.8.3 Translation Lookaside
    Buffer (TLB), POWER8 supports lockless TLBIE operations.
    
    Locally Tested:
    
    * IBM POWER8 Revision 2.0, dual socket, 160 threads
    
    Differential Revision:  https://reviews.freebsd.org/D54855
    Approved by:    jhibbits
    
    (cherry picked from commit 9a5baa9c585652fb7bd4ccd45d567204caf349f2)
---
 sys/powerpc/aim/moea64_native.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sys/powerpc/aim/moea64_native.c b/sys/powerpc/aim/moea64_native.c
index bf254e1f466c..20beccbdf935 100644
--- a/sys/powerpc/aim/moea64_native.c
+++ b/sys/powerpc/aim/moea64_native.c
@@ -565,6 +565,11 @@ moea64_bootstrap_native(vm_offset_t kernelstart, vm_offset_t kernelend)
 	moea64_early_bootstrap(kernelstart, kernelend);
 
 	switch (mfpvr() >> 16) {
+	case IBMPOWER8:
+	case IBMPOWER8E:
+	case IBMPOWER8NVL:
+		moea64_need_lock = false;
+		break;
 	case IBMPOWER9:
 		moea64_need_lock = false;
 		break;