git: d3eaa40282c7 - main - riscv: save FPE state in cpu_fork().

The branch main has been updated by br:

URL: https://cgit.FreeBSD.org/src/commit/?id=d3eaa40282c7734385d028b6a4fb9574d17255e3

commit d3eaa40282c7734385d028b6a4fb9574d17255e3
Author:     Jari Sihvola <jsihv@gmx.com>
AuthorDate: 2026-03-05 08:57:22 +0000
Commit:     Ruslan Bukin <br@FreeBSD.org>
CommitDate: 2026-03-05 09:00:23 +0000

    riscv: save FPE state in cpu_fork().
    
    Save the Floating Point Extension (FPE) state before copying struct pcb.
    
    Reviewed by:    br
    Differential Revision:  https://reviews.freebsd.org/D53804
---
 sys/riscv/riscv/vm_machdep.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/sys/riscv/riscv/vm_machdep.c b/sys/riscv/riscv/vm_machdep.c
index e5a5cf31af15..e0254f80e62f 100644
--- a/sys/riscv/riscv/vm_machdep.c
+++ b/sys/riscv/riscv/vm_machdep.c
@@ -48,6 +48,7 @@
 
 #include <machine/riscvreg.h>
 #include <machine/cpu.h>
+#include <machine/fpe.h>
 #include <machine/cpufunc.h>
 #include <machine/pcb.h>
 #include <machine/frame.h>
@@ -91,7 +92,13 @@ cpu_fork(struct thread *td1, struct proc *p2, struct thread *td2, int flags)
 	if ((flags & RFPROC) == 0)
 		return;
 
-	/* RISCVTODO: save the FPU state here */
+	/* Ensure the floating-point state is saved before copying the pcb. */
+	if ((td1->td_pcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
+		MPASS(td1 == curthread);
+		critical_enter();
+		fpe_state_save(td1);
+		critical_exit();
+	}
 
 	cpu_set_pcb_frame(td2);