/*
* 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.
*
* Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
*
* Derived from book3s_rmhandlers.S and other files, which are:
*
* Copyright SUSE Linux Products GmbH 2009
*
* Authors: Alexander Graf <agraf@suse.de>
*/
#include <asm/ppc_asm.h>
#include <asm/kvm_asm.h>
#include <asm/reg.h>
#include <asm/page.h>
#include <asm/asm-offsets.h>
#include <asm/exception-64s.h>
/*****************************************************************************
* *
* Real Mode handlers that need to be in the linear mapping *
* *
****************************************************************************/
.globl kvmppc_skip_interrupt
kvmppc_skip_interrupt:
mfspr r13,SPRN_SRR0
addi r13,r13,4
mtspr SPRN_SRR0,r13
GET_SCRATCH0(r13)
rfid
b .
.globl kvmppc_skip_Hinterrupt
kvmppc_skip_Hinterrupt:
mfspr r13,SPRN_HSRR0
addi r13,r13,4
mtspr SPRN_HSRR0,r13
GET_SCRATCH0(r13)
hrfid
b .
/*
* Call kvmppc_handler_trampoline_enter in real mode.
* Must be called with interrupts hard-disabled.
*
* Input Registers:
*
* LR = return address to continue at after eventually re-enabling MMU
*/
_GLOBAL(kvmppc_hv_entry_trampoline)
mfmsr r10
LOAD_REG_ADDR(r5, kvmppc_hv_entry)
li r0,MSR_RI
andc r0,r10,r0
li r6,MSR_IR | MSR_DR
andc r6,r10,r6
mtmsrd r0,1 /* clear RI in MSR */
mtsrr0 r5
mtsrr1 r6
RFI
#define ULONG_SIZE 8
#define VCPU_GPR(n) (VCPU_GPRS + (n * ULONG_SIZE))
/******************************************************************************
* *
* Entry code *
* *
*****************************************************************************/
#define XICS_XIRR 4
#define XICS_QIRR 0xc
/*
* We come in here when wakened from nap mode on a secondary hw thread.
* Relocation is off and most register values are lost.
* r13 points to the PACA.
*/
.globl kvm_start_guest
kvm_start_guest:
ld r1,PACAEMERGSP(r13)
subi r1,r1,STACK_FRAME_OVERHEAD
/* get vcpu pointer */
ld r4, HSTATE_KVM_VCPU(r13)
/* We got here with an IPI; clear it */
ld r5, HSTATE_XICS_PHYS(r13)
li r0, 0xff
li r6, XICS_QIRR
li r7, XICS_XIRR
lwzcix r8, r5, r7 /* ack the interrupt */
sync
stbcix r0, r5, r6 /* clear it */
stwcix r8, r5, r7 /* EOI it */
.global kvmppc_hv_entry
kvmppc_hv_entry:
/*
