mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 01:41:39 +00:00
![Bharat Bhushan](/assets/img/avatar_default.png)
Installed debug handler will be used for guest debug support and debug facility emulation features (patches for these features will follow this patch). Signed-off-by: Liu Yu <yu.liu@freescale.com> [bharat.bhushan@freescale.com: Substantial changes] Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
552 lines
15 KiB
ArmAsm
552 lines
15 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 IBM Corp. 2007
|
|
* Copyright 2011 Freescale Semiconductor, Inc.
|
|
*
|
|
* Authors: Hollis Blanchard <hollisb@us.ibm.com>
|
|
*/
|
|
|
|
#include <asm/ppc_asm.h>
|
|
#include <asm/kvm_asm.h>
|
|
#include <asm/reg.h>
|
|
#include <asm/mmu-44x.h>
|
|
#include <asm/page.h>
|
|
#include <asm/asm-offsets.h>
|
|
|
|
/* The host stack layout: */
|
|
#define HOST_R1 0 /* Implied by stwu. */
|
|
#define HOST_CALLEE_LR 4
|
|
#define HOST_RUN 8
|
|
/* r2 is special: it holds 'current', and it made nonvolatile in the
|
|
* kernel with the -ffixed-r2 gcc option. */
|
|
#define HOST_R2 12
|
|
#define HOST_CR 16
|
|
#define HOST_NV_GPRS 20
|
|
#define __HOST_NV_GPR(n) (HOST_NV_GPRS + ((n - 14) * 4))
|
|
#define HOST_NV_GPR(n) __HOST_NV_GPR(__REG_##n)
|
|
#define HOST_MIN_STACK_SIZE (HOST_NV_GPR(R31) + 4)
|
|
#define HOST_STACK_SIZE (((HOST_MIN_STACK_SIZE + 15) / 16) * 16) /* Align. */
|
|
#define HOST_STACK_LR (HOST_STACK_SIZE + 4) /* In caller stack frame. */
|
|
|
|
#define NEED_INST_MASK ((1<<BOOKE_INTERRUPT_PROGRAM) | \
|
|
(1<<BOOKE_INTERRUPT_DTLB_MISS) | \
|
|
(1<<BOOKE_INTERRUPT_DEBUG))
|
|
|
|
#define NEED_DEAR_MASK ((1<<BOOKE_INTERRUPT_DATA_STORAGE) | \
|
|
(1<<BOOKE_INTERRUPT_DTLB_MISS) | \
|
|
(1<<BOOKE_INTERRUPT_ALIGNMENT))
|
|
|
|
#define NEED_ESR_MASK ((1<<BOOKE_INTERRUPT_DATA_STORAGE) | \
|
|
(1<<BOOKE_INTERRUPT_INST_STORAGE) | \
|
|
(1<<BOOKE_INTERRUPT_PROGRAM) | \
|
|
(1<<BOOKE_INTERRUPT_DTLB_MISS) | \
|
|
(1<<BOOKE_INTERRUPT_ALIGNMENT))
|
|
|
|
.macro __KVM_HANDLER ivor_nr scratch srr0
|
|
/* Get pointer to vcpu and record exit number. */
|
|
mtspr \scratch , r4
|
|
mfspr r4, SPRN_SPRG_THREAD
|
|
lwz r4, THREAD_KVM_VCPU(r4)
|
|
stw r3, VCPU_GPR(R3)(r4)
|
|
stw r5, VCPU_GPR(R5)(r4)
|
|
stw r6, VCPU_GPR(R6)(r4)
|
|
mfspr r3, \scratch
|
|
mfctr r5
|
|
stw r3, VCPU_GPR(R4)(r4)
|
|
stw r5, VCPU_CTR(r4)
|
|
mfspr r3, \srr0
|
|
lis r6, kvmppc_resume_host@h
|
|
stw r3, VCPU_PC(r4)
|
|
li r5, \ivor_nr
|
|
ori r6, r6, kvmppc_resume_host@l
|
|
mtctr r6
|
|
bctr
|
|
.endm
|
|
|
|
.macro KVM_HANDLER ivor_nr scratch srr0
|
|
_GLOBAL(kvmppc_handler_\ivor_nr)
|
|
__KVM_HANDLER \ivor_nr \scratch \srr0
|
|
.endm
|
|
|
|
.macro KVM_DBG_HANDLER ivor_nr scratch srr0
|
|
_GLOBAL(kvmppc_handler_\ivor_nr)
|
|
mtspr \scratch, r4
|
|
mfspr r4, SPRN_SPRG_THREAD
|
|
lwz r4, THREAD_KVM_VCPU(r4)
|
|
stw r3, VCPU_CRIT_SAVE(r4)
|
|
mfcr r3
|
|
mfspr r4, SPRN_CSRR1
|
|
andi. r4, r4, MSR_PR
|
|
bne 1f
|
|
/* debug interrupt happened in enter/exit path */
|
|
mfspr r4, SPRN_CSRR1
|
|
rlwinm r4, r4, 0, ~MSR_DE
|
|
mtspr SPRN_CSRR1, r4
|
|
lis r4, 0xffff
|
|
ori r4, r4, 0xffff
|
|
mtspr SPRN_DBSR, r4
|
|
mfspr r4, SPRN_SPRG_THREAD
|
|
lwz r4, THREAD_KVM_VCPU(r4)
|
|
mtcr r3
|
|
lwz r3, VCPU_CRIT_SAVE(r4)
|
|
mfspr r4, \scratch
|
|
rfci
|
|
1: /* debug interrupt happened in guest */
|
|
mtcr r3
|
|
mfspr r4, SPRN_SPRG_THREAD
|
|
lwz r4, THREAD_KVM_VCPU(r4)
|
|
lwz r3, VCPU_CRIT_SAVE(r4)
|
|
mfspr r4, \scratch
|
|
__KVM_HANDLER \ivor_nr \scratch \srr0
|
|
.endm
|
|
|
|
.macro KVM_HANDLER_ADDR ivor_nr
|
|
.long kvmppc_handler_\ivor_nr
|
|
.endm
|
|
|
|
.macro KVM_HANDLER_END
|
|
.long kvmppc_handlers_end
|
|
.endm
|
|
|
|
_GLOBAL(kvmppc_handlers_start)
|
|
KVM_HANDLER BOOKE_INTERRUPT_CRITICAL SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_MACHINE_CHECK SPRN_SPRG_RSCRATCH_MC SPRN_MCSRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_DATA_STORAGE SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_INST_STORAGE SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_EXTERNAL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_ALIGNMENT SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_PROGRAM SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_FP_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_SYSCALL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_AP_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_DECREMENTER SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_FIT SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_WATCHDOG SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_DTLB_MISS SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_ITLB_MISS SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_DBG_HANDLER BOOKE_INTERRUPT_DEBUG SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_SPE_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_SPE_FP_DATA SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
KVM_HANDLER BOOKE_INTERRUPT_SPE_FP_ROUND SPRN_SPRG_RSCRATCH0 SPRN_SRR0
|
|
_GLOBAL(kvmppc_handlers_end)
|
|
|
|
/* Registers:
|
|
* SPRG_SCRATCH0: guest r4
|
|
* r4: vcpu pointer
|
|
* r5: KVM exit number
|
|
*/
|
|
_GLOBAL(kvmppc_resume_host)
|
|
mfcr r3
|
|
stw r3, VCPU_CR(r4)
|
|
stw r7, VCPU_GPR(R7)(r4)
|
|
stw r8, VCPU_GPR(R8)(r4)
|
|
stw r9, VCPU_GPR(R9)(r4)
|
|
|
|
li r6, 1
|
|
slw r6, r6, r5
|
|
|
|
#ifdef CONFIG_KVM_EXIT_TIMING
|
|
/* save exit time */
|
|
1:
|
|
mfspr r7, SPRN_TBRU
|
|
mfspr r8, SPRN_TBRL
|
|
mfspr r9, SPRN_TBRU
|
|
cmpw r9, r7
|
|
bne 1b
|
|
stw r8, VCPU_TIMING_EXIT_TBL(r4)
|
|
stw r9, VCPU_TIMING_EXIT_TBU(r4)
|
|
#endif
|
|
|
|
/* Save the faulting instruction and all GPRs for emulation. */
|
|
andi. r7, r6, NEED_INST_MASK
|
|
beq ..skip_inst_copy
|
|
mfspr r9, SPRN_SRR0
|
|
mfmsr r8
|
|
ori r7, r8, MSR_DS
|
|
mtmsr r7
|
|
isync
|
|
lwz r9, 0(r9)
|
|
mtmsr r8
|
|
isync
|
|
stw r9, VCPU_LAST_INST(r4)
|
|
|
|
stw r15, VCPU_GPR(R15)(r4)
|
|
stw r16, VCPU_GPR(R16)(r4)
|
|
stw r17, VCPU_GPR(R17)(r4)
|
|
stw r18, VCPU_GPR(R18)(r4)
|
|
stw r19, VCPU_GPR(R19)(r4)
|
|
stw r20, VCPU_GPR(R20)(r4)
|
|
stw r21, VCPU_GPR(R21)(r4)
|
|
stw r22, VCPU_GPR(R22)(r4)
|
|
stw r23, VCPU_GPR(R23)(r4)
|
|
stw r24, VCPU_GPR(R24)(r4)
|
|
stw r25, VCPU_GPR(R25)(r4)
|
|
stw r26, VCPU_GPR(R26)(r4)
|
|
stw r27, VCPU_GPR(R27)(r4)
|
|
stw r28, VCPU_GPR(R28)(r4)
|
|
stw r29, VCPU_GPR(R29)(r4)
|
|
stw r30, VCPU_GPR(R30)(r4)
|
|
stw r31, VCPU_GPR(R31)(r4)
|
|
..skip_inst_copy:
|
|
|
|
/* Also grab DEAR and ESR before the host can clobber them. */
|
|
|
|
andi. r7, r6, NEED_DEAR_MASK
|
|
beq ..skip_dear
|
|
mfspr r9, SPRN_DEAR
|
|
stw r9, VCPU_FAULT_DEAR(r4)
|
|
..skip_dear:
|
|
|
|
andi. r7, r6, NEED_ESR_MASK
|
|
beq ..skip_esr
|
|
mfspr r9, SPRN_ESR
|
|
stw r9, VCPU_FAULT_ESR(r4)
|
|
..skip_esr:
|
|
|
|
/* Save remaining volatile guest register state to vcpu. */
|
|
stw r0, VCPU_GPR(R0)(r4)
|
|
stw r1, VCPU_GPR(R1)(r4)
|
|
stw r2, VCPU_GPR(R2)(r4)
|
|
stw r10, VCPU_GPR(R10)(r4)
|
|
stw r11, VCPU_GPR(R11)(r4)
|
|
stw r12, VCPU_GPR(R12)(r4)
|
|
stw r13, VCPU_GPR(R13)(r4)
|
|
stw r14, VCPU_GPR(R14)(r4) /* We need a NV GPR below. */
|
|
mflr r3
|
|
stw r3, VCPU_LR(r4)
|
|
mfxer r3
|
|
stw r3, VCPU_XER(r4)
|
|
|
|
/* Restore host stack pointer and PID before IVPR, since the host
|
|
* exception handlers use them. */
|
|
lwz r1, VCPU_HOST_STACK(r4)
|
|
lwz r3, VCPU_HOST_PID(r4)
|
|
mtspr SPRN_PID, r3
|
|
|
|
#ifdef CONFIG_FSL_BOOKE
|
|
/* we cheat and know that Linux doesn't use PID1 which is always 0 */
|
|
lis r3, 0
|
|
mtspr SPRN_PID1, r3
|
|
#endif
|
|
|
|
/* Restore host IVPR before re-enabling interrupts. We cheat and know
|
|
* that Linux IVPR is always 0xc0000000. */
|
|
lis r3, 0xc000
|
|
mtspr SPRN_IVPR, r3
|
|
|
|
/* Switch to kernel stack and jump to handler. */
|
|
LOAD_REG_ADDR(r3, kvmppc_handle_exit)
|
|
mtctr r3
|
|
lwz r3, HOST_RUN(r1)
|
|
lwz r2, HOST_R2(r1)
|
|
mr r14, r4 /* Save vcpu pointer. */
|
|
|
|
bctrl /* kvmppc_handle_exit() */
|
|
|
|
/* Restore vcpu pointer and the nonvolatiles we used. */
|
|
mr r4, r14
|
|
lwz r14, VCPU_GPR(R14)(r4)
|
|
|
|
/* Sometimes instruction emulation must restore complete GPR state. */
|
|
andi. r5, r3, RESUME_FLAG_NV
|
|
beq ..skip_nv_load
|
|
lwz r15, VCPU_GPR(R15)(r4)
|
|
lwz r16, VCPU_GPR(R16)(r4)
|
|
lwz r17, VCPU_GPR(R17)(r4)
|
|
lwz r18, VCPU_GPR(R18)(r4)
|
|
lwz r19, VCPU_GPR(R19)(r4)
|
|
lwz r20, VCPU_GPR(R20)(r4)
|
|
lwz r21, VCPU_GPR(R21)(r4)
|
|
lwz r22, VCPU_GPR(R22)(r4)
|
|
lwz r23, VCPU_GPR(R23)(r4)
|
|
lwz r24, VCPU_GPR(R24)(r4)
|
|
lwz r25, VCPU_GPR(R25)(r4)
|
|
lwz r26, VCPU_GPR(R26)(r4)
|
|
lwz r27, VCPU_GPR(R27)(r4)
|
|
lwz r28, VCPU_GPR(R28)(r4)
|
|
lwz r29, VCPU_GPR(R29)(r4)
|
|
lwz r30, VCPU_GPR(R30)(r4)
|
|
lwz r31, VCPU_GPR(R31)(r4)
|
|
..skip_nv_load:
|
|
|
|
/* Should we return to the guest? */
|
|
andi. r5, r3, RESUME_FLAG_HOST
|
|
beq lightweight_exit
|
|
|
|
srawi r3, r3, 2 /* Shift -ERR back down. */
|
|
|
|
heavyweight_exit:
|
|
/* Not returning to guest. */
|
|
|
|
#ifdef CONFIG_SPE
|
|
/* save guest SPEFSCR and load host SPEFSCR */
|
|
mfspr r9, SPRN_SPEFSCR
|
|
stw r9, VCPU_SPEFSCR(r4)
|
|
lwz r9, VCPU_HOST_SPEFSCR(r4)
|
|
mtspr SPRN_SPEFSCR, r9
|
|
#endif
|
|
|
|
/* We already saved guest volatile register state; now save the
|
|
* non-volatiles. */
|
|
stw r15, VCPU_GPR(R15)(r4)
|
|
stw r16, VCPU_GPR(R16)(r4)
|
|
stw r17, VCPU_GPR(R17)(r4)
|
|
stw r18, VCPU_GPR(R18)(r4)
|
|
stw r19, VCPU_GPR(R19)(r4)
|
|
stw r20, VCPU_GPR(R20)(r4)
|
|
stw r21, VCPU_GPR(R21)(r4)
|
|
stw r22, VCPU_GPR(R22)(r4)
|
|
stw r23, VCPU_GPR(R23)(r4)
|
|
stw r24, VCPU_GPR(R24)(r4)
|
|
stw r25, VCPU_GPR(R25)(r4)
|
|
stw r26, VCPU_GPR(R26)(r4)
|
|
stw r27, VCPU_GPR(R27)(r4)
|
|
stw r28, VCPU_GPR(R28)(r4)
|
|
stw r29, VCPU_GPR(R29)(r4)
|
|
stw r30, VCPU_GPR(R30)(r4)
|
|
stw r31, VCPU_GPR(R31)(r4)
|
|
|
|
/* Load host non-volatile register state from host stack. */
|
|
lwz r14, HOST_NV_GPR(R14)(r1)
|
|
lwz r15, HOST_NV_GPR(R15)(r1)
|
|
lwz r16, HOST_NV_GPR(R16)(r1)
|
|
lwz r17, HOST_NV_GPR(R17)(r1)
|
|
lwz r18, HOST_NV_GPR(R18)(r1)
|
|
lwz r19, HOST_NV_GPR(R19)(r1)
|
|
lwz r20, HOST_NV_GPR(R20)(r1)
|
|
lwz r21, HOST_NV_GPR(R21)(r1)
|
|
lwz r22, HOST_NV_GPR(R22)(r1)
|
|
lwz r23, HOST_NV_GPR(R23)(r1)
|
|
lwz r24, HOST_NV_GPR(R24)(r1)
|
|
lwz r25, HOST_NV_GPR(R25)(r1)
|
|
lwz r26, HOST_NV_GPR(R26)(r1)
|
|
lwz r27, HOST_NV_GPR(R27)(r1)
|
|
lwz r28, HOST_NV_GPR(R28)(r1)
|
|
lwz r29, HOST_NV_GPR(R29)(r1)
|
|
lwz r30, HOST_NV_GPR(R30)(r1)
|
|
lwz r31, HOST_NV_GPR(R31)(r1)
|
|
|
|
/* Return to kvm_vcpu_run(). */
|
|
lwz r4, HOST_STACK_LR(r1)
|
|
lwz r5, HOST_CR(r1)
|
|
addi r1, r1, HOST_STACK_SIZE
|
|
mtlr r4
|
|
mtcr r5
|
|
/* r3 still contains the return code from kvmppc_handle_exit(). */
|
|
blr
|
|
|
|
|
|
/* Registers:
|
|
* r3: kvm_run pointer
|
|
* r4: vcpu pointer
|
|
*/
|
|
_GLOBAL(__kvmppc_vcpu_run)
|
|
stwu r1, -HOST_STACK_SIZE(r1)
|
|
stw r1, VCPU_HOST_STACK(r4) /* Save stack pointer to vcpu. */
|
|
|
|
/* Save host state to stack. */
|
|
stw r3, HOST_RUN(r1)
|
|
mflr r3
|
|
stw r3, HOST_STACK_LR(r1)
|
|
mfcr r5
|
|
stw r5, HOST_CR(r1)
|
|
|
|
/* Save host non-volatile register state to stack. */
|
|
stw r14, HOST_NV_GPR(R14)(r1)
|
|
stw r15, HOST_NV_GPR(R15)(r1)
|
|
stw r16, HOST_NV_GPR(R16)(r1)
|
|
stw r17, HOST_NV_GPR(R17)(r1)
|
|
stw r18, HOST_NV_GPR(R18)(r1)
|
|
stw r19, HOST_NV_GPR(R19)(r1)
|
|
stw r20, HOST_NV_GPR(R20)(r1)
|
|
stw r21, HOST_NV_GPR(R21)(r1)
|
|
stw r22, HOST_NV_GPR(R22)(r1)
|
|
stw r23, HOST_NV_GPR(R23)(r1)
|
|
stw r24, HOST_NV_GPR(R24)(r1)
|
|
stw r25, HOST_NV_GPR(R25)(r1)
|
|
stw r26, HOST_NV_GPR(R26)(r1)
|
|
stw r27, HOST_NV_GPR(R27)(r1)
|
|
stw r28, HOST_NV_GPR(R28)(r1)
|
|
stw r29, HOST_NV_GPR(R29)(r1)
|
|
stw r30, HOST_NV_GPR(R30)(r1)
|
|
stw r31, HOST_NV_GPR(R31)(r1)
|
|
|
|
/* Load guest non-volatiles. */
|
|
lwz r14, VCPU_GPR(R14)(r4)
|
|
lwz r15, VCPU_GPR(R15)(r4)
|
|
lwz r16, VCPU_GPR(R16)(r4)
|
|
lwz r17, VCPU_GPR(R17)(r4)
|
|
lwz r18, VCPU_GPR(R18)(r4)
|
|
lwz r19, VCPU_GPR(R19)(r4)
|
|
lwz r20, VCPU_GPR(R20)(r4)
|
|
lwz r21, VCPU_GPR(R21)(r4)
|
|
lwz r22, VCPU_GPR(R22)(r4)
|
|
lwz r23, VCPU_GPR(R23)(r4)
|
|
lwz r24, VCPU_GPR(R24)(r4)
|
|
lwz r25, VCPU_GPR(R25)(r4)
|
|
lwz r26, VCPU_GPR(R26)(r4)
|
|
lwz r27, VCPU_GPR(R27)(r4)
|
|
lwz r28, VCPU_GPR(R28)(r4)
|
|
lwz r29, VCPU_GPR(R29)(r4)
|
|
lwz r30, VCPU_GPR(R30)(r4)
|
|
lwz r31, VCPU_GPR(R31)(r4)
|
|
|
|
#ifdef CONFIG_SPE
|
|
/* save host SPEFSCR and load guest SPEFSCR */
|
|
mfspr r3, SPRN_SPEFSCR
|
|
stw r3, VCPU_HOST_SPEFSCR(r4)
|
|
lwz r3, VCPU_SPEFSCR(r4)
|
|
mtspr SPRN_SPEFSCR, r3
|
|
#endif
|
|
|
|
lightweight_exit:
|
|
stw r2, HOST_R2(r1)
|
|
|
|
mfspr r3, SPRN_PID
|
|
stw r3, VCPU_HOST_PID(r4)
|
|
lwz r3, VCPU_SHADOW_PID(r4)
|
|
mtspr SPRN_PID, r3
|
|
|
|
#ifdef CONFIG_FSL_BOOKE
|
|
lwz r3, VCPU_SHADOW_PID1(r4)
|
|
mtspr SPRN_PID1, r3
|
|
#endif
|
|
|
|
#ifdef CONFIG_44x
|
|
iccci 0, 0 /* XXX hack */
|
|
#endif
|
|
|
|
/* Load some guest volatiles. */
|
|
lwz r0, VCPU_GPR(R0)(r4)
|
|
lwz r2, VCPU_GPR(R2)(r4)
|
|
lwz r9, VCPU_GPR(R9)(r4)
|
|
lwz r10, VCPU_GPR(R10)(r4)
|
|
lwz r11, VCPU_GPR(R11)(r4)
|
|
lwz r12, VCPU_GPR(R12)(r4)
|
|
lwz r13, VCPU_GPR(R13)(r4)
|
|
lwz r3, VCPU_LR(r4)
|
|
mtlr r3
|
|
lwz r3, VCPU_XER(r4)
|
|
mtxer r3
|
|
|
|
/* Switch the IVPR. XXX If we take a TLB miss after this we're screwed,
|
|
* so how do we make sure vcpu won't fault? */
|
|
lis r8, kvmppc_booke_handlers@ha
|
|
lwz r8, kvmppc_booke_handlers@l(r8)
|
|
mtspr SPRN_IVPR, r8
|
|
|
|
lwz r5, VCPU_SHARED(r4)
|
|
|
|
/* Can't switch the stack pointer until after IVPR is switched,
|
|
* because host interrupt handlers would get confused. */
|
|
lwz r1, VCPU_GPR(R1)(r4)
|
|
|
|
/*
|
|
* Host interrupt handlers may have clobbered these
|
|
* guest-readable SPRGs, or the guest kernel may have
|
|
* written directly to the shared area, so we
|
|
* need to reload them here with the guest's values.
|
|
*/
|
|
PPC_LD(r3, VCPU_SHARED_SPRG4, r5)
|
|
mtspr SPRN_SPRG4W, r3
|
|
PPC_LD(r3, VCPU_SHARED_SPRG5, r5)
|
|
mtspr SPRN_SPRG5W, r3
|
|
PPC_LD(r3, VCPU_SHARED_SPRG6, r5)
|
|
mtspr SPRN_SPRG6W, r3
|
|
PPC_LD(r3, VCPU_SHARED_SPRG7, r5)
|
|
mtspr SPRN_SPRG7W, r3
|
|
|
|
#ifdef CONFIG_KVM_EXIT_TIMING
|
|
/* save enter time */
|
|
1:
|
|
mfspr r6, SPRN_TBRU
|
|
mfspr r7, SPRN_TBRL
|
|
mfspr r8, SPRN_TBRU
|
|
cmpw r8, r6
|
|
bne 1b
|
|
stw r7, VCPU_TIMING_LAST_ENTER_TBL(r4)
|
|
stw r8, VCPU_TIMING_LAST_ENTER_TBU(r4)
|
|
#endif
|
|
|
|
/* Finish loading guest volatiles and jump to guest. */
|
|
lwz r3, VCPU_CTR(r4)
|
|
lwz r5, VCPU_CR(r4)
|
|
lwz r6, VCPU_PC(r4)
|
|
lwz r7, VCPU_SHADOW_MSR(r4)
|
|
mtctr r3
|
|
mtcr r5
|
|
mtsrr0 r6
|
|
mtsrr1 r7
|
|
lwz r5, VCPU_GPR(R5)(r4)
|
|
lwz r6, VCPU_GPR(R6)(r4)
|
|
lwz r7, VCPU_GPR(R7)(r4)
|
|
lwz r8, VCPU_GPR(R8)(r4)
|
|
|
|
/* Clear any debug events which occurred since we disabled MSR[DE].
|
|
* XXX This gives us a 3-instruction window in which a breakpoint
|
|
* intended for guest context could fire in the host instead. */
|
|
lis r3, 0xffff
|
|
ori r3, r3, 0xffff
|
|
mtspr SPRN_DBSR, r3
|
|
|
|
lwz r3, VCPU_GPR(R3)(r4)
|
|
lwz r4, VCPU_GPR(R4)(r4)
|
|
rfi
|
|
|
|
.data
|
|
.align 4
|
|
.globl kvmppc_booke_handler_addr
|
|
kvmppc_booke_handler_addr:
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_CRITICAL
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_MACHINE_CHECK
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_DATA_STORAGE
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_INST_STORAGE
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_EXTERNAL
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_ALIGNMENT
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_PROGRAM
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_FP_UNAVAIL
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_SYSCALL
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_AP_UNAVAIL
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_DECREMENTER
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_FIT
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_WATCHDOG
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_DTLB_MISS
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_ITLB_MISS
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_DEBUG
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_SPE_UNAVAIL
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_SPE_FP_DATA
|
|
KVM_HANDLER_ADDR BOOKE_INTERRUPT_SPE_FP_ROUND
|
|
KVM_HANDLER_END /*Always keep this in end*/
|
|
|
|
#ifdef CONFIG_SPE
|
|
_GLOBAL(kvmppc_save_guest_spe)
|
|
cmpi 0,r3,0
|
|
beqlr-
|
|
SAVE_32EVRS(0, r4, r3, VCPU_EVR)
|
|
evxor evr6, evr6, evr6
|
|
evmwumiaa evr6, evr6, evr6
|
|
li r4,VCPU_ACC
|
|
evstddx evr6, r4, r3 /* save acc */
|
|
blr
|
|
|
|
_GLOBAL(kvmppc_load_guest_spe)
|
|
cmpi 0,r3,0
|
|
beqlr-
|
|
li r4,VCPU_ACC
|
|
evlddx evr6,r4,r3
|
|
evmra evr6,evr6 /* load acc */
|
|
REST_32EVRS(0, r4, r3, VCPU_EVR)
|
|
blr
|
|
#endif
|