mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 09:46:53 +07:00
092bd143cb
Provide EL2 with page tables and stack, and set the vectors to point to the full blown world-switch code. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
108 lines
2.2 KiB
ArmAsm
108 lines
2.2 KiB
ArmAsm
/*
|
|
* Copyright (C) 2012,2013 - ARM Ltd
|
|
* Author: Marc Zyngier <marc.zyngier@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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
#include <asm/assembler.h>
|
|
#include <asm/kvm_arm.h>
|
|
#include <asm/kvm_mmu.h>
|
|
|
|
.text
|
|
.pushsection .hyp.idmap.text, "ax"
|
|
|
|
.align 11
|
|
|
|
ENTRY(__kvm_hyp_init)
|
|
ventry __invalid // Synchronous EL2t
|
|
ventry __invalid // IRQ EL2t
|
|
ventry __invalid // FIQ EL2t
|
|
ventry __invalid // Error EL2t
|
|
|
|
ventry __invalid // Synchronous EL2h
|
|
ventry __invalid // IRQ EL2h
|
|
ventry __invalid // FIQ EL2h
|
|
ventry __invalid // Error EL2h
|
|
|
|
ventry __do_hyp_init // Synchronous 64-bit EL1
|
|
ventry __invalid // IRQ 64-bit EL1
|
|
ventry __invalid // FIQ 64-bit EL1
|
|
ventry __invalid // Error 64-bit EL1
|
|
|
|
ventry __invalid // Synchronous 32-bit EL1
|
|
ventry __invalid // IRQ 32-bit EL1
|
|
ventry __invalid // FIQ 32-bit EL1
|
|
ventry __invalid // Error 32-bit EL1
|
|
|
|
__invalid:
|
|
b .
|
|
|
|
/*
|
|
* x0: HYP boot pgd
|
|
* x1: HYP pgd
|
|
* x2: HYP stack
|
|
* x3: HYP vectors
|
|
*/
|
|
__do_hyp_init:
|
|
|
|
msr ttbr0_el2, x0
|
|
|
|
mrs x4, tcr_el1
|
|
ldr x5, =TCR_EL2_MASK
|
|
and x4, x4, x5
|
|
ldr x5, =TCR_EL2_FLAGS
|
|
orr x4, x4, x5
|
|
msr tcr_el2, x4
|
|
|
|
ldr x4, =VTCR_EL2_FLAGS
|
|
msr vtcr_el2, x4
|
|
|
|
mrs x4, mair_el1
|
|
msr mair_el2, x4
|
|
isb
|
|
|
|
mov x4, #SCTLR_EL2_FLAGS
|
|
msr sctlr_el2, x4
|
|
isb
|
|
|
|
/* MMU is now enabled. Get ready for the trampoline dance */
|
|
ldr x4, =TRAMPOLINE_VA
|
|
adr x5, target
|
|
bfi x4, x5, #0, #PAGE_SHIFT
|
|
br x4
|
|
|
|
target: /* We're now in the trampoline code, switch page tables */
|
|
msr ttbr0_el2, x1
|
|
isb
|
|
|
|
/* Invalidate the old TLBs */
|
|
tlbi alle2
|
|
dsb sy
|
|
|
|
/* Set the stack and new vectors */
|
|
kern_hyp_va x2
|
|
mov sp, x2
|
|
kern_hyp_va x3
|
|
msr vbar_el2, x3
|
|
|
|
/* Hello, World! */
|
|
eret
|
|
ENDPROC(__kvm_hyp_init)
|
|
|
|
.ltorg
|
|
|
|
.popsection
|