Commit 092bd143 authored by Marc Zyngier's avatar Marc Zyngier

arm64: KVM: hypervisor initialization code

Provide EL2 with page tables and stack, and set the vectors
to point to the full blown world-switch code.
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 2f4a07c5
......@@ -183,4 +183,17 @@ int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
int kvm_perf_init(void);
int kvm_perf_teardown(void);
static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
phys_addr_t pgd_ptr,
unsigned long hyp_stack_ptr,
unsigned long vector_ptr)
{
/*
* Call initialization code, and switch to the full blown
* HYP code.
*/
kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr,
hyp_stack_ptr, vector_ptr);
}
#endif /* __ARM64_KVM_HOST_H__ */
/*
* 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
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