blob: 064f4f118ca73d0ff49a0e00185d5e985a1817a1 [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0-only */
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
* Author: Christoffer Dall <>
#include <linux/linkage.h>
* 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).
* The calling convention follows the standard AAPCS:
* r0 - r3: caller save
* r12: caller save
* rest: callee save
hvc #0
bx lr