Date: Mon, 21 Oct 2024 15:05:08 GMT From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 3f2ed1883896 - stable/14 - arm64: Create a version of vfp_save_state for cpu_switch Message-ID: <202410211505.49LF58n8046865@gitrepo.freebsd.org>
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The branch stable/14 has been updated by andrew: URL: https://cgit.FreeBSD.org/src/commit/?id=3f2ed1883896651e51a98060f34808457d24f679 commit 3f2ed1883896651e51a98060f34808457d24f679 Author: Andrew Turner <andrew@FreeBSD.org> AuthorDate: 2024-06-12 13:09:14 +0000 Commit: Andrew Turner <andrew@FreeBSD.org> CommitDate: 2024-10-21 15:03:26 +0000 arm64: Create a version of vfp_save_state for cpu_switch This will be used when we add SVE support to reduce the registers needed to be saved on context switch. Reviewed by: imp Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D43305 (cherry picked from commit a30149b2a9c6ac5280523eea9570e5b5e5f1fdf8) --- sys/arm64/arm64/swtch.S | 4 +--- sys/arm64/arm64/vfp.c | 8 ++++++++ sys/arm64/include/vfp.h | 1 + 3 files changed, 10 insertions(+), 3 deletions(-) diff --git a/sys/arm64/arm64/swtch.S b/sys/arm64/arm64/swtch.S index 9c43de3a9eae..882bfd7cf05a 100644 --- a/sys/arm64/arm64/swtch.S +++ b/sys/arm64/arm64/swtch.S @@ -146,9 +146,7 @@ ENTRY(cpu_switch) mov x21, x2 #ifdef VFP - /* Load the pcb address */ - mov x1, x4 - bl vfp_save_state + bl vfp_save_state_switch mov x0, x20 #else mov x0, x1 diff --git a/sys/arm64/arm64/vfp.c b/sys/arm64/arm64/vfp.c index f35cd960702b..c65108a83399 100644 --- a/sys/arm64/arm64/vfp.c +++ b/sys/arm64/arm64/vfp.c @@ -216,6 +216,14 @@ vfp_save_state_savectx(struct pcb *pcb) vfp_save_state_common(curthread, pcb); } +void +vfp_save_state_switch(struct thread *td) +{ + KASSERT(td != NULL, ("NULL vfp thread")); + + vfp_save_state_common(td, td->td_pcb); +} + /* * Update the VFP state for a forked process or new thread. The PCB will * have been copied from the old thread. diff --git a/sys/arm64/include/vfp.h b/sys/arm64/include/vfp.h index 7f4c86e7737d..47d068d6050c 100644 --- a/sys/arm64/include/vfp.h +++ b/sys/arm64/include/vfp.h @@ -79,6 +79,7 @@ void vfp_reset_state(struct thread *, struct pcb *); void vfp_restore_state(void); void vfp_save_state(struct thread *, struct pcb *); void vfp_save_state_savectx(struct pcb *); +void vfp_save_state_switch(struct thread *); struct fpu_kern_ctx;
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