mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 10:00:53 +07:00
da166facd4
We switched to ABIv2 on Little Endian systems now which gets rid of the dotted function names. Branch to the actual functions when we see such a system. Signed-off-by: Alexander Graf <agraf@suse.de>
170 lines
4.6 KiB
ArmAsm
170 lines
4.6 KiB
ArmAsm
/*
|
|
* 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.
|
|
*
|
|
* 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/mmu.h>
|
|
#include <asm/page.h>
|
|
#include <asm/asm-offsets.h>
|
|
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
#include <asm/exception-64s.h>
|
|
#endif
|
|
|
|
/*****************************************************************************
|
|
* *
|
|
* Real Mode handlers that need to be in low physical memory *
|
|
* *
|
|
****************************************************************************/
|
|
|
|
#if defined(CONFIG_PPC_BOOK3S_64)
|
|
|
|
#if defined(_CALL_ELF) && _CALL_ELF == 2
|
|
#define FUNC(name) name
|
|
#else
|
|
#define FUNC(name) GLUE(.,name)
|
|
#endif
|
|
|
|
#elif defined(CONFIG_PPC_BOOK3S_32)
|
|
|
|
#define FUNC(name) name
|
|
|
|
.macro INTERRUPT_TRAMPOLINE intno
|
|
|
|
.global kvmppc_trampoline_\intno
|
|
kvmppc_trampoline_\intno:
|
|
|
|
mtspr SPRN_SPRG_SCRATCH0, r13 /* Save r13 */
|
|
|
|
/*
|
|
* First thing to do is to find out if we're coming
|
|
* from a KVM guest or a Linux process.
|
|
*
|
|
* To distinguish, we check a magic byte in the PACA/current
|
|
*/
|
|
mfspr r13, SPRN_SPRG_THREAD
|
|
lwz r13, THREAD_KVM_SVCPU(r13)
|
|
/* PPC32 can have a NULL pointer - let's check for that */
|
|
mtspr SPRN_SPRG_SCRATCH1, r12 /* Save r12 */
|
|
mfcr r12
|
|
cmpwi r13, 0
|
|
bne 1f
|
|
2: mtcr r12
|
|
mfspr r12, SPRN_SPRG_SCRATCH1
|
|
mfspr r13, SPRN_SPRG_SCRATCH0 /* r13 = original r13 */
|
|
b kvmppc_resume_\intno /* Get back original handler */
|
|
|
|
1: tophys(r13, r13)
|
|
stw r12, HSTATE_SCRATCH1(r13)
|
|
mfspr r12, SPRN_SPRG_SCRATCH1
|
|
stw r12, HSTATE_SCRATCH0(r13)
|
|
lbz r12, HSTATE_IN_GUEST(r13)
|
|
cmpwi r12, KVM_GUEST_MODE_NONE
|
|
bne ..kvmppc_handler_hasmagic_\intno
|
|
/* No KVM guest? Then jump back to the Linux handler! */
|
|
lwz r12, HSTATE_SCRATCH1(r13)
|
|
b 2b
|
|
|
|
/* Now we know we're handling a KVM guest */
|
|
..kvmppc_handler_hasmagic_\intno:
|
|
|
|
/* Should we just skip the faulting instruction? */
|
|
cmpwi r12, KVM_GUEST_MODE_SKIP
|
|
beq kvmppc_handler_skip_ins
|
|
|
|
/* Let's store which interrupt we're handling */
|
|
li r12, \intno
|
|
|
|
/* Jump into the SLB exit code that goes to the highmem handler */
|
|
b kvmppc_handler_trampoline_exit
|
|
|
|
.endm
|
|
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_SYSTEM_RESET
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_MACHINE_CHECK
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_STORAGE
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_STORAGE
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_EXTERNAL
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALIGNMENT
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PROGRAM
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_FP_UNAVAIL
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DECREMENTER
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_SYSCALL
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_TRACE
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PERFMON
|
|
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALTIVEC
|
|
|
|
/*
|
|
* Bring us back to the faulting code, but skip the
|
|
* faulting instruction.
|
|
*
|
|
* This is a generic exit path from the interrupt
|
|
* trampolines above.
|
|
*
|
|
* Input Registers:
|
|
*
|
|
* R12 = free
|
|
* R13 = Shadow VCPU (PACA)
|
|
* HSTATE.SCRATCH0 = guest R12
|
|
* HSTATE.SCRATCH1 = guest CR
|
|
* SPRG_SCRATCH0 = guest R13
|
|
*
|
|
*/
|
|
kvmppc_handler_skip_ins:
|
|
|
|
/* Patch the IP to the next instruction */
|
|
mfsrr0 r12
|
|
addi r12, r12, 4
|
|
mtsrr0 r12
|
|
|
|
/* Clean up all state */
|
|
lwz r12, HSTATE_SCRATCH1(r13)
|
|
mtcr r12
|
|
PPC_LL r12, HSTATE_SCRATCH0(r13)
|
|
GET_SCRATCH0(r13)
|
|
|
|
/* And get back into the code */
|
|
RFI
|
|
#endif
|
|
|
|
/*
|
|
* Call kvmppc_handler_trampoline_enter in real mode
|
|
*
|
|
* On entry, r4 contains the guest shadow MSR
|
|
* MSR.EE has to be 0 when calling this function
|
|
*/
|
|
_GLOBAL_TOC(kvmppc_entry_trampoline)
|
|
mfmsr r5
|
|
LOAD_REG_ADDR(r7, kvmppc_handler_trampoline_enter)
|
|
toreal(r7)
|
|
|
|
li r6, MSR_IR | MSR_DR
|
|
andc r6, r5, r6 /* Clear DR and IR in MSR value */
|
|
/*
|
|
* Set EE in HOST_MSR so that it's enabled when we get into our
|
|
* C exit handler function.
|
|
*/
|
|
ori r5, r5, MSR_EE
|
|
mtsrr0 r7
|
|
mtsrr1 r6
|
|
RFI
|
|
|
|
#include "book3s_segment.S"
|