mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
b98e2e728e
As we now have a full reimplementation of the world switch, it is time to kiss the old stuff goodbye. I'm not sure we'll miss it. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
53 lines
1.9 KiB
ArmAsm
53 lines
1.9 KiB
ArmAsm
/*
|
|
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
|
|
* Author: Christoffer Dall <c.dall@virtualopensystems.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License, version 2, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
.text
|
|
|
|
/********************************************************************
|
|
* Call function in Hyp mode
|
|
*
|
|
*
|
|
* unsigned long kvm_call_hyp(void *hypfn, ...);
|
|
*
|
|
* This is not really a variadic function in the classic C-way and care must
|
|
* be taken when calling this to ensure parameters are passed in registers
|
|
* only, since the stack will change between the caller and the callee.
|
|
*
|
|
* Call the function with the first argument containing a pointer to the
|
|
* function you wish to call in Hyp mode, and subsequent arguments will be
|
|
* passed as r0, r1, and r2 (a maximum of 3 arguments in addition to the
|
|
* function pointer can be passed). The function being called must be mapped
|
|
* in Hyp mode (see init_hyp_mode in arch/arm/kvm/arm.c). Return values are
|
|
* passed in r0 (strictly 32bit).
|
|
*
|
|
* A function pointer with a value of 0xffffffff has a special meaning,
|
|
* and is used to implement __hyp_get_vectors in the same way as in
|
|
* arch/arm/kernel/hyp_stub.S.
|
|
*
|
|
* The calling convention follows the standard AAPCS:
|
|
* r0 - r3: caller save
|
|
* r12: caller save
|
|
* rest: callee save
|
|
*/
|
|
ENTRY(kvm_call_hyp)
|
|
hvc #0
|
|
bx lr
|
|
ENDPROC(kvm_call_hyp)
|