From 2f529f9b558ca1c1bd74be7437a84e4711743404 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 01 Nov 2024 02:11:33 +0000
Subject: [PATCH] add xenomai
---
kernel/arch/x86/include/asm/fpu/internal.h | 31 ++++++++++++++++++++++++++++++-
1 files changed, 30 insertions(+), 1 deletions(-)
diff --git a/kernel/arch/x86/include/asm/fpu/internal.h b/kernel/arch/x86/include/asm/fpu/internal.h
index 70b9bc5..11d31cf 100644
--- a/kernel/arch/x86/include/asm/fpu/internal.h
+++ b/kernel/arch/x86/include/asm/fpu/internal.h
@@ -15,6 +15,7 @@
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/mm.h>
+#include <linux/dovetail.h>
#include <asm/user.h>
#include <asm/fpu/api.h>
@@ -509,6 +510,32 @@
clear_thread_flag(TIF_NEED_FPU_LOAD);
}
+#ifdef CONFIG_DOVETAIL
+
+static inline void oob_fpu_set_preempt(struct fpu *fpu)
+{
+ fpu->preempted = 1;
+}
+
+static inline void oob_fpu_clear_preempt(struct fpu *fpu)
+{
+ fpu->preempted = 0;
+}
+
+static inline bool oob_fpu_preempted(struct fpu *old_fpu)
+{
+ return old_fpu->preempted;
+}
+
+#else
+
+static inline bool oob_fpu_preempted(struct fpu *old_fpu)
+{
+ return false;
+}
+
+#endif /* !CONFIG_DOVETAIL */
+
/*
* FPU state switching for scheduling.
*
@@ -535,7 +562,9 @@
{
struct fpu *old_fpu = &prev->thread.fpu;
- if (static_cpu_has(X86_FEATURE_FPU) && !(prev->flags & PF_KTHREAD)) {
+ if (static_cpu_has(X86_FEATURE_FPU) &&
+ !(prev->flags & PF_KTHREAD) &&
+ !oob_fpu_preempted(old_fpu)) {
if (!copy_fpregs_to_fpstate(old_fpu))
old_fpu->last_cpu = -1;
else
--
Gitblit v1.6.2