git: 6a762cfae145 - main - powerpc: Fix powerpcspe WRT FPSCR

[Justin Hibbits]

The branch main has been updated by jhibbits:

URL: https://cgit.FreeBSD.org/src/commit/?id=6a762cfae145625e491528531709145c76228870

commit 6a762cfae145625e491528531709145c76228870
Author:     Justin Hibbits <jhibbits at FreeBSD.org>
AuthorDate: 2021-03-28 00:24:59 +0000
Commit:     Justin Hibbits <jhibbits at FreeBSD.org>
CommitDate: 2021-03-28 00:24:59 +0000

    powerpc: Fix powerpcspe WRT FPSCR
    
    Summary:
    Since powerpcspe doesn't have a traditional FPU, there's no FPSCR, and
    no FPRs.  Attempting to use them triggers an illegal instruction trap.
    Fix this unconditional cleanup of FPSCR by conditionalizing it on the
    FPU being used in the outgoing thread.
    
    Reviewed By: bdragon
    Differential Revision: https://reviews.freebsd.org/D29452
---
 sys/powerpc/powerpc/exec_machdep.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/powerpc/powerpc/exec_machdep.c b/sys/powerpc/powerpc/exec_machdep.c
index 91cc9a98f7a7..97e4caba956a 100644
--- a/sys/powerpc/powerpc/exec_machdep.c
+++ b/sys/powerpc/powerpc/exec_machdep.c
@@ -566,7 +566,8 @@ cleanup_power_extras(struct thread *td)
 	if (pcb_flags & PCB_CDSCR) 
 		mtspr(SPR_DSCRP, 0);
 
-	cleanup_fpscr();
+	if (pcb_flags & PCB_FPU)
+		cleanup_fpscr();
 }
 
 /*