From 90294f99e606a952ac83a27c433bf5546bf27c3c Mon Sep 17 00:00:00 2001
From: jdolecek <jdolecek@NetBSD.org>
Date: Wed, 8 Jul 2020 11:11:00 +0000
Subject: [PATCH] initalize ci_kfpu_spl, to avoid triggering KASSERT() in
 fpu_kern_enter()

Follows revision 1.177 of sys/arch/x86/x86/cpu.c:
"""
Add a small API for in-kernel FPU operations.

        fpu_kern_enter();
        /* do FPU stuff */
        fpu_kern_leave();
"""

With this DomU kernel boots with:
[   2.0000571] aes: Intel AES-NI
---
 sys/arch/xen/x86/cpu.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sys/arch/xen/x86/cpu.c b/sys/arch/xen/x86/cpu.c
index 0957c08ae5f3..e2e9245bb1ca 100644
--- a/sys/arch/xen/x86/cpu.c
+++ b/sys/arch/xen/x86/cpu.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: cpu.c,v 1.137 2020/06/27 09:54:08 jdolecek Exp $	*/
+/*	$NetBSD: cpu.c,v 1.138 2020/07/08 11:11:00 jdolecek Exp $	*/
 
 /*-
  * Copyright (c) 2000 The NetBSD Foundation, Inc.
@@ -65,7 +65,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.137 2020/06/27 09:54:08 jdolecek Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.138 2020/07/08 11:11:00 jdolecek Exp $");
 
 #include "opt_ddb.h"
 #include "opt_multiprocessor.h"
@@ -232,6 +232,7 @@ cpu_attach(device_t parent, device_t self, void *aux)
 	ci->ci_cpuid = caa->cpu_number;
 	ci->ci_vcpu = NULL;
 	ci->ci_index = nphycpu++;
+	ci->ci_kfpu_spl = -1;
 
 	if (!pmf_device_register(self, NULL, NULL))
 		aprint_error_dev(self, "couldn't establish power handler\n");
@@ -391,6 +392,7 @@ cpu_attach_common(device_t parent, device_t self, void *aux)
 	ci->ci_dev = self;
 	ci->ci_cpuid = cpunum;
 	ci->ci_vcpuid = cpunum;
+	ci->ci_kfpu_spl = -1;
 
 	KASSERT(HYPERVISOR_shared_info != NULL);
 	KASSERT(cpunum < XEN_LEGACY_MAX_VCPUS);