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LinuxKPI: Add xen/xen.h header

Browse Source 
It contains proxy-implementation of xen_initial_domain() and
xen_pv_domain() required by latest drm-kmod.

Sponsored by:	Serenity Cyber Security, LLC
Reviewed by:	manu, bz
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D42797
This commit is contained in:
Vladimir Kondratyev 2023-12-24 11:19:58 +03:00
parent fa862482fb
commit c612e3c262
2 changed files with 67 additions and 0 deletions
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37
sys/compat/linuxkpi/common/include/xen/xen.h Normal file
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@ -0,0 +1,37 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2023 Serenity Cyber Security, LLC.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _LINUXKPI_XEN_XEN_H_
#define _LINUXKPI_XEN_XEN_H_
#define xen_initial_domain() lkpi_xen_initial_domain()
#define xen_pv_domain() lkpi_xen_pv_domain()
bool lkpi_xen_initial_domain(void);
bool lkpi_xen_pv_domain(void);
#endif /* _LINUXKPI_XEN_XEN_H_ */

30
sys/compat/linuxkpi/common/src/linux_compat.c
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@ -28,6 +28,7 @@
*/
#include <sys/cdefs.h>
#include "opt_global.h"
#include "opt_stack.h"
#include <sys/param.h>
@ -99,6 +100,15 @@
#include <asm/processor.h>
#endif
#include <xen/xen.h>
#ifdef XENHVM
#undef xen_pv_domain
#undef xen_initial_domain
/* xen/xen-os.h redefines __must_check */
#undef __must_check
#include <xen/xen-os.h>
#endif
SYSCTL_NODE(_compat, OID_AUTO, linuxkpi, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
"LinuxKPI parameters");
@ -2585,6 +2595,26 @@ lkpi_get_static_single_cpu_mask(int cpuid)
return (static_single_cpu_mask[cpuid]);
}
bool
lkpi_xen_initial_domain(void)
{
#ifdef XENHVM
return (xen_initial_domain());
#else
return (false);
#endif
}
bool
lkpi_xen_pv_domain(void)
{
#ifdef XENHVM
return (xen_pv_domain());
#else
return (false);
#endif
}
static void
linux_compat_init(void *arg)
{