mirror of
https://github.com/torvalds/linux.git
synced 2024-11-06 03:51:48 +00:00
3c1e716508
Trying to emulate the behaviour of set/way cache ops is fairly pointless, as there are too many ways we can end-up missing stuff. Also, there is some system caches out there that simply ignore set/way operations. So instead of trying to implement them, let's convert it to VA ops, and use them as a way to re-enable the trapping of VM ops. That way, we can detect the point when the MMU/caches are turned off, and do a full VM flush (which is what the guest was trying to do anyway). This allows a 32bit zImage to boot on the APM thingy, and will probably help bootloaders in general. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/*
|
|
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
|
|
* Copyright (C) 2013 - ARM Ltd
|
|
*
|
|
* Authors: Rusty Russell <rusty@rustcorp.au>
|
|
* Christoffer Dall <c.dall@virtualopensystems.com>
|
|
* Jonathan Austin <jonathan.austin@arm.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/kvm_host.h>
|
|
#include <asm/kvm_coproc.h>
|
|
#include <asm/kvm_emulate.h>
|
|
#include <linux/init.h>
|
|
|
|
#include "coproc.h"
|
|
|
|
/*
|
|
* Cortex-A7 specific CP15 registers.
|
|
* CRn denotes the primary register number, but is copied to the CRm in the
|
|
* user space API for 64-bit register access in line with the terminology used
|
|
* in the ARM ARM.
|
|
* Important: Must be sorted ascending by CRn, CRM, Op1, Op2 and with 64-bit
|
|
* registers preceding 32-bit ones.
|
|
*/
|
|
static const struct coproc_reg a7_regs[] = {
|
|
/* SCTLR: swapped by interrupt.S. */
|
|
{ CRn( 1), CRm( 0), Op1( 0), Op2( 0), is32,
|
|
access_vm_reg, reset_val, c1_SCTLR, 0x00C50878 },
|
|
};
|
|
|
|
static struct kvm_coproc_target_table a7_target_table = {
|
|
.target = KVM_ARM_TARGET_CORTEX_A7,
|
|
.table = a7_regs,
|
|
.num = ARRAY_SIZE(a7_regs),
|
|
};
|
|
|
|
static int __init coproc_a7_init(void)
|
|
{
|
|
kvm_register_target_coproc_table(&a7_target_table);
|
|
return 0;
|
|
}
|
|
late_initcall(coproc_a7_init);
|