mips/kvm: Improve code formatting in arch/mips/kvm/kvm_locore.S
No code changes, just reflowing some comments and consistently using tabs and spaces. Object code is verified to be unchanged. Signed-off-by: David Daney <david.daney@cavium.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
David Daney
committed by
Gleb Natapov
Gleb Natapov
parent
cc2df20c7c
commit
2c07ebbd2c
@ -1,13 +1,13 @@
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/*
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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* for more details.
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*
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*
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* Main entry point for the guest, exception handling.
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* Main entry point for the guest, exception handling.
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*
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*
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* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
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* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
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* Authors: Sanjay Lal <sanjayl@kymasys.com>
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* Authors: Sanjay Lal <sanjayl@kymasys.com>
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*/
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*/
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#include <asm/asm.h>
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#include <asm/asm.h>
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#include <asm/asmmacro.h>
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#include <asm/asmmacro.h>
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@ -57,172 +57,177 @@
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*/
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*/
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FEXPORT(__kvm_mips_vcpu_run)
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FEXPORT(__kvm_mips_vcpu_run)
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.set push
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.set push
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.set noreorder
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.set noreorder
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.set noat
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.set noat
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/* k0/k1 not being used in host kernel context */
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/* k0/k1 not being used in host kernel context */
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addiu k1,sp, -PT_SIZE
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addiu k1, sp, -PT_SIZE
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LONG_S $0, PT_R0(k1)
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LONG_S $0, PT_R0(k1)
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LONG_S $1, PT_R1(k1)
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LONG_S $1, PT_R1(k1)
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LONG_S $2, PT_R2(k1)
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LONG_S $2, PT_R2(k1)
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LONG_S $3, PT_R3(k1)
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LONG_S $3, PT_R3(k1)
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LONG_S $4, PT_R4(k1)
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LONG_S $4, PT_R4(k1)
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LONG_S $5, PT_R5(k1)
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LONG_S $5, PT_R5(k1)
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LONG_S $6, PT_R6(k1)
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LONG_S $6, PT_R6(k1)
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LONG_S $7, PT_R7(k1)
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LONG_S $7, PT_R7(k1)
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LONG_S $8, PT_R8(k1)
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LONG_S $8, PT_R8(k1)
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LONG_S $9, PT_R9(k1)
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LONG_S $9, PT_R9(k1)
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LONG_S $10, PT_R10(k1)
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LONG_S $10, PT_R10(k1)
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LONG_S $11, PT_R11(k1)
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LONG_S $11, PT_R11(k1)
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LONG_S $12, PT_R12(k1)
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LONG_S $12, PT_R12(k1)
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LONG_S $13, PT_R13(k1)
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LONG_S $13, PT_R13(k1)
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LONG_S $14, PT_R14(k1)
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LONG_S $14, PT_R14(k1)
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LONG_S $15, PT_R15(k1)
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LONG_S $15, PT_R15(k1)
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LONG_S $16, PT_R16(k1)
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LONG_S $16, PT_R16(k1)
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LONG_S $17, PT_R17(k1)
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LONG_S $17, PT_R17(k1)
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LONG_S $18, PT_R18(k1)
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LONG_S $18, PT_R18(k1)
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LONG_S $19, PT_R19(k1)
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LONG_S $19, PT_R19(k1)
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LONG_S $20, PT_R20(k1)
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LONG_S $20, PT_R20(k1)
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LONG_S $21, PT_R21(k1)
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LONG_S $21, PT_R21(k1)
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LONG_S $22, PT_R22(k1)
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LONG_S $22, PT_R22(k1)
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LONG_S $23, PT_R23(k1)
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LONG_S $23, PT_R23(k1)
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LONG_S $24, PT_R24(k1)
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LONG_S $24, PT_R24(k1)
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LONG_S $25, PT_R25(k1)
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LONG_S $25, PT_R25(k1)
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/* XXXKYMA k0/k1 not saved, not being used if we got here through an ioctl() */
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/* XXXKYMA k0/k1 not saved, not being used if we got here through an ioctl() */
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LONG_S $28, PT_R28(k1)
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LONG_S $28, PT_R28(k1)
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LONG_S $29, PT_R29(k1)
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LONG_S $29, PT_R29(k1)
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LONG_S $30, PT_R30(k1)
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LONG_S $30, PT_R30(k1)
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LONG_S $31, PT_R31(k1)
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LONG_S $31, PT_R31(k1)
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/* Save hi/lo */
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/* Save hi/lo */
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mflo v0
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mflo v0
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LONG_S v0, PT_LO(k1)
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LONG_S v0, PT_LO(k1)
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mfhi v1
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mfhi v1
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LONG_S v1, PT_HI(k1)
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LONG_S v1, PT_HI(k1)
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/* Save host status */
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/* Save host status */
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mfc0 v0, CP0_STATUS
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mfc0 v0, CP0_STATUS
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LONG_S v0, PT_STATUS(k1)
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LONG_S v0, PT_STATUS(k1)
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/* Save host ASID, shove it into the BVADDR location */
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/* Save host ASID, shove it into the BVADDR location */
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mfc0 v1,CP0_ENTRYHI
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mfc0 v1, CP0_ENTRYHI
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andi v1, 0xff
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andi v1, 0xff
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LONG_S v1, PT_HOST_ASID(k1)
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LONG_S v1, PT_HOST_ASID(k1)
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/* Save DDATA_LO, will be used to store pointer to vcpu */
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/* Save DDATA_LO, will be used to store pointer to vcpu */
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mfc0 v1, CP0_DDATA_LO
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mfc0 v1, CP0_DDATA_LO
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LONG_S v1, PT_HOST_USERLOCAL(k1)
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LONG_S v1, PT_HOST_USERLOCAL(k1)
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/* DDATA_LO has pointer to vcpu */
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/* DDATA_LO has pointer to vcpu */
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mtc0 a1,CP0_DDATA_LO
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mtc0 a1, CP0_DDATA_LO
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/* Offset into vcpu->arch */
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/* Offset into vcpu->arch */
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addiu k1, a1, VCPU_HOST_ARCH
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addiu k1, a1, VCPU_HOST_ARCH
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/* Save the host stack to VCPU, used for exception processing when we exit from the Guest */
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/*
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LONG_S sp, VCPU_HOST_STACK(k1)
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* Save the host stack to VCPU, used for exception processing
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* when we exit from the Guest
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*/
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LONG_S sp, VCPU_HOST_STACK(k1)
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/* Save the kernel gp as well */
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/* Save the kernel gp as well */
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LONG_S gp, VCPU_HOST_GP(k1)
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LONG_S gp, VCPU_HOST_GP(k1)
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/* Setup status register for running the guest in UM, interrupts are disabled */
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/* Setup status register for running the guest in UM, interrupts are disabled */
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li k0,(ST0_EXL | KSU_USER| ST0_BEV)
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li k0, (ST0_EXL | KSU_USER | ST0_BEV)
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mtc0 k0,CP0_STATUS
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mtc0 k0, CP0_STATUS
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ehb
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ehb
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/* load up the new EBASE */
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/* load up the new EBASE */
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LONG_L k0, VCPU_GUEST_EBASE(k1)
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LONG_L k0, VCPU_GUEST_EBASE(k1)
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mtc0 k0,CP0_EBASE
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mtc0 k0, CP0_EBASE
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/* Now that the new EBASE has been loaded, unset BEV, set interrupt mask as it was
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/*
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* but make sure that timer interrupts are enabled
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* Now that the new EBASE has been loaded, unset BEV, set
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*/
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* interrupt mask as it was but make sure that timer interrupts
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li k0,(ST0_EXL | KSU_USER | ST0_IE)
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* are enabled
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andi v0, v0, ST0_IM
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*/
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or k0, k0, v0
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li k0, (ST0_EXL | KSU_USER | ST0_IE)
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mtc0 k0,CP0_STATUS
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andi v0, v0, ST0_IM
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ehb
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or k0, k0, v0
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mtc0 k0, CP0_STATUS
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ehb
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/* Set Guest EPC */
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/* Set Guest EPC */
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LONG_L t0, VCPU_PC(k1)
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LONG_L t0, VCPU_PC(k1)
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mtc0 t0, CP0_EPC
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mtc0 t0, CP0_EPC
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FEXPORT(__kvm_mips_load_asid)
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FEXPORT(__kvm_mips_load_asid)
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/* Set the ASID for the Guest Kernel */
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/* Set the ASID for the Guest Kernel */
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sll t0, t0, 1 /* with kseg0 @ 0x40000000, kernel */
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sll t0, t0, 1 /* with kseg0 @ 0x40000000, kernel */
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/* addresses shift to 0x80000000 */
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/* addresses shift to 0x80000000 */
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bltz t0, 1f /* If kernel */
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bltz t0, 1f /* If kernel */
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addiu t1, k1, VCPU_GUEST_KERNEL_ASID /* (BD) */
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addiu t1, k1, VCPU_GUEST_KERNEL_ASID /* (BD) */
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addiu t1, k1, VCPU_GUEST_USER_ASID /* else user */
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addiu t1, k1, VCPU_GUEST_USER_ASID /* else user */
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1:
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1:
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/* t1: contains the base of the ASID array, need to get the cpu id */
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/* t1: contains the base of the ASID array, need to get the cpu id */
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LONG_L t2, TI_CPU($28) /* smp_processor_id */
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LONG_L t2, TI_CPU($28) /* smp_processor_id */
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sll t2, t2, 2 /* x4 */
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sll t2, t2, 2 /* x4 */
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addu t3, t1, t2
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addu t3, t1, t2
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LONG_L k0, (t3)
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LONG_L k0, (t3)
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andi k0, k0, 0xff
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andi k0, k0, 0xff
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mtc0 k0,CP0_ENTRYHI
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mtc0 k0, CP0_ENTRYHI
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ehb
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ehb
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/* Disable RDHWR access */
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/* Disable RDHWR access */
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mtc0 zero, CP0_HWRENA
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mtc0 zero, CP0_HWRENA
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/* Now load up the Guest Context from VCPU */
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/* Now load up the Guest Context from VCPU */
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LONG_L $1, VCPU_R1(k1)
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LONG_L $1, VCPU_R1(k1)
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LONG_L $2, VCPU_R2(k1)
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LONG_L $2, VCPU_R2(k1)
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LONG_L $3, VCPU_R3(k1)
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LONG_L $3, VCPU_R3(k1)
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LONG_L $4, VCPU_R4(k1)
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LONG_L $4, VCPU_R4(k1)
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LONG_L $5, VCPU_R5(k1)
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LONG_L $5, VCPU_R5(k1)
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LONG_L $6, VCPU_R6(k1)
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LONG_L $6, VCPU_R6(k1)
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LONG_L $7, VCPU_R7(k1)
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LONG_L $7, VCPU_R7(k1)
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LONG_L $8, VCPU_R8(k1)
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LONG_L $8, VCPU_R8(k1)
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LONG_L $9, VCPU_R9(k1)
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LONG_L $9, VCPU_R9(k1)
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LONG_L $10, VCPU_R10(k1)
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LONG_L $10, VCPU_R10(k1)
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LONG_L $11, VCPU_R11(k1)
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LONG_L $11, VCPU_R11(k1)
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LONG_L $12, VCPU_R12(k1)
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LONG_L $12, VCPU_R12(k1)
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LONG_L $13, VCPU_R13(k1)
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LONG_L $13, VCPU_R13(k1)
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LONG_L $14, VCPU_R14(k1)
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LONG_L $14, VCPU_R14(k1)
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LONG_L $15, VCPU_R15(k1)
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LONG_L $15, VCPU_R15(k1)
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LONG_L $16, VCPU_R16(k1)
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LONG_L $16, VCPU_R16(k1)
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LONG_L $17, VCPU_R17(k1)
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LONG_L $17, VCPU_R17(k1)
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LONG_L $18, VCPU_R18(k1)
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LONG_L $18, VCPU_R18(k1)
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LONG_L $19, VCPU_R19(k1)
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LONG_L $19, VCPU_R19(k1)
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LONG_L $20, VCPU_R20(k1)
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LONG_L $20, VCPU_R20(k1)
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LONG_L $21, VCPU_R21(k1)
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LONG_L $21, VCPU_R21(k1)
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LONG_L $22, VCPU_R22(k1)
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LONG_L $22, VCPU_R22(k1)
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LONG_L $23, VCPU_R23(k1)
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LONG_L $23, VCPU_R23(k1)
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LONG_L $24, VCPU_R24(k1)
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LONG_L $24, VCPU_R24(k1)
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LONG_L $25, VCPU_R25(k1)
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LONG_L $25, VCPU_R25(k1)
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/* k0/k1 loaded up later */
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/* k0/k1 loaded up later */
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LONG_L $28, VCPU_R28(k1)
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LONG_L $28, VCPU_R28(k1)
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LONG_L $29, VCPU_R29(k1)
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LONG_L $29, VCPU_R29(k1)
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LONG_L $30, VCPU_R30(k1)
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LONG_L $30, VCPU_R30(k1)
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LONG_L $31, VCPU_R31(k1)
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LONG_L $31, VCPU_R31(k1)
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/* Restore hi/lo */
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/* Restore hi/lo */
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LONG_L k0, VCPU_LO(k1)
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LONG_L k0, VCPU_LO(k1)
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mtlo k0
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mtlo k0
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LONG_L k0, VCPU_HI(k1)
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LONG_L k0, VCPU_HI(k1)
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mthi k0
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mthi k0
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FEXPORT(__kvm_mips_load_k0k1)
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FEXPORT(__kvm_mips_load_k0k1)
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/* Restore the guest's k0/k1 registers */
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/* Restore the guest's k0/k1 registers */
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LONG_L k0, VCPU_R26(k1)
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LONG_L k0, VCPU_R26(k1)
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LONG_L k1, VCPU_R27(k1)
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LONG_L k1, VCPU_R27(k1)
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/* Jump to guest */
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/* Jump to guest */
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eret
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eret
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.set pop
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.set pop
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@ -230,19 +235,19 @@ VECTOR(MIPSX(exception), unknown)
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/*
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/*
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* Find out what mode we came from and jump to the proper handler.
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* Find out what mode we came from and jump to the proper handler.
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*/
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*/
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.set push
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.set push
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.set noat
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.set noat
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.set noreorder
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.set noreorder
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mtc0 k0, CP0_ERROREPC #01: Save guest k0
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mtc0 k0, CP0_ERROREPC #01: Save guest k0
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ehb #02:
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ehb #02:
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mfc0 k0, CP0_EBASE #02: Get EBASE
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mfc0 k0, CP0_EBASE #02: Get EBASE
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srl k0, k0, 10 #03: Get rid of CPUNum
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srl k0, k0, 10 #03: Get rid of CPUNum
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sll k0, k0, 10 #04
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sll k0, k0, 10 #04
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LONG_S k1, 0x3000(k0) #05: Save k1 @ offset 0x3000
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LONG_S k1, 0x3000(k0) #05: Save k1 @ offset 0x3000
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addiu k0, k0, 0x2000 #06: Exception handler is installed @ offset 0x2000
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addiu k0, k0, 0x2000 #06: Exception handler is installed @ offset 0x2000
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j k0 #07: jump to the function
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j k0 #07: jump to the function
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nop #08: branch delay slot
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nop #08: branch delay slot
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.set push
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.set push
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VECTOR_END(MIPSX(exceptionEnd))
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VECTOR_END(MIPSX(exceptionEnd))
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.end MIPSX(exception)
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.end MIPSX(exception)
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@ -253,329 +258,332 @@ VECTOR_END(MIPSX(exceptionEnd))
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*
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*
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*/
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*/
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NESTED (MIPSX(GuestException), CALLFRAME_SIZ, ra)
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NESTED (MIPSX(GuestException), CALLFRAME_SIZ, ra)
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.set push
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.set push
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.set noat
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.set noat
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.set noreorder
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.set noreorder
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/* Get the VCPU pointer from DDTATA_LO */
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/* Get the VCPU pointer from DDTATA_LO */
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mfc0 k1, CP0_DDATA_LO
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mfc0 k1, CP0_DDATA_LO
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addiu k1, k1, VCPU_HOST_ARCH
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addiu k1, k1, VCPU_HOST_ARCH
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/* Start saving Guest context to VCPU */
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/* Start saving Guest context to VCPU */
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LONG_S $0, VCPU_R0(k1)
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LONG_S $0, VCPU_R0(k1)
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LONG_S $1, VCPU_R1(k1)
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LONG_S $1, VCPU_R1(k1)
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LONG_S $2, VCPU_R2(k1)
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LONG_S $2, VCPU_R2(k1)
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LONG_S $3, VCPU_R3(k1)
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LONG_S $3, VCPU_R3(k1)
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LONG_S $4, VCPU_R4(k1)
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LONG_S $4, VCPU_R4(k1)
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LONG_S $5, VCPU_R5(k1)
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LONG_S $5, VCPU_R5(k1)
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LONG_S $6, VCPU_R6(k1)
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LONG_S $6, VCPU_R6(k1)
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LONG_S $7, VCPU_R7(k1)
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LONG_S $7, VCPU_R7(k1)
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LONG_S $8, VCPU_R8(k1)
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LONG_S $8, VCPU_R8(k1)
|
||||||
LONG_S $9, VCPU_R9(k1)
|
LONG_S $9, VCPU_R9(k1)
|
||||||
LONG_S $10, VCPU_R10(k1)
|
LONG_S $10, VCPU_R10(k1)
|
||||||
LONG_S $11, VCPU_R11(k1)
|
LONG_S $11, VCPU_R11(k1)
|
||||||
LONG_S $12, VCPU_R12(k1)
|
LONG_S $12, VCPU_R12(k1)
|
||||||
LONG_S $13, VCPU_R13(k1)
|
LONG_S $13, VCPU_R13(k1)
|
||||||
LONG_S $14, VCPU_R14(k1)
|
LONG_S $14, VCPU_R14(k1)
|
||||||
LONG_S $15, VCPU_R15(k1)
|
LONG_S $15, VCPU_R15(k1)
|
||||||
LONG_S $16, VCPU_R16(k1)
|
LONG_S $16, VCPU_R16(k1)
|
||||||
LONG_S $17,VCPU_R17(k1)
|
LONG_S $17, VCPU_R17(k1)
|
||||||
LONG_S $18, VCPU_R18(k1)
|
LONG_S $18, VCPU_R18(k1)
|
||||||
LONG_S $19, VCPU_R19(k1)
|
LONG_S $19, VCPU_R19(k1)
|
||||||
LONG_S $20, VCPU_R20(k1)
|
LONG_S $20, VCPU_R20(k1)
|
||||||
LONG_S $21, VCPU_R21(k1)
|
LONG_S $21, VCPU_R21(k1)
|
||||||
LONG_S $22, VCPU_R22(k1)
|
LONG_S $22, VCPU_R22(k1)
|
||||||
LONG_S $23, VCPU_R23(k1)
|
LONG_S $23, VCPU_R23(k1)
|
||||||
LONG_S $24, VCPU_R24(k1)
|
LONG_S $24, VCPU_R24(k1)
|
||||||
LONG_S $25, VCPU_R25(k1)
|
LONG_S $25, VCPU_R25(k1)
|
||||||
|
|
||||||
/* Guest k0/k1 saved later */
|
/* Guest k0/k1 saved later */
|
||||||
|
|
||||||
LONG_S $28, VCPU_R28(k1)
|
LONG_S $28, VCPU_R28(k1)
|
||||||
LONG_S $29, VCPU_R29(k1)
|
LONG_S $29, VCPU_R29(k1)
|
||||||
LONG_S $30, VCPU_R30(k1)
|
LONG_S $30, VCPU_R30(k1)
|
||||||
LONG_S $31, VCPU_R31(k1)
|
LONG_S $31, VCPU_R31(k1)
|
||||||
|
|
||||||
/* We need to save hi/lo and restore them on
|
/* We need to save hi/lo and restore them on
|
||||||
* the way out
|
* the way out
|
||||||
*/
|
*/
|
||||||
mfhi t0
|
mfhi t0
|
||||||
LONG_S t0, VCPU_HI(k1)
|
LONG_S t0, VCPU_HI(k1)
|
||||||
|
|
||||||
mflo t0
|
mflo t0
|
||||||
LONG_S t0, VCPU_LO(k1)
|
LONG_S t0, VCPU_LO(k1)
|
||||||
|
|
||||||
/* Finally save guest k0/k1 to VCPU */
|
/* Finally save guest k0/k1 to VCPU */
|
||||||
mfc0 t0, CP0_ERROREPC
|
mfc0 t0, CP0_ERROREPC
|
||||||
LONG_S t0, VCPU_R26(k1)
|
LONG_S t0, VCPU_R26(k1)
|
||||||
|
|
||||||
/* Get GUEST k1 and save it in VCPU */
|
/* Get GUEST k1 and save it in VCPU */
|
||||||
la t1, ~0x2ff
|
la t1, ~0x2ff
|
||||||
mfc0 t0, CP0_EBASE
|
mfc0 t0, CP0_EBASE
|
||||||
and t0, t0, t1
|
and t0, t0, t1
|
||||||
LONG_L t0, 0x3000(t0)
|
LONG_L t0, 0x3000(t0)
|
||||||
LONG_S t0, VCPU_R27(k1)
|
LONG_S t0, VCPU_R27(k1)
|
||||||
|
|
||||||
/* Now that context has been saved, we can use other registers */
|
/* Now that context has been saved, we can use other registers */
|
||||||
|
|
||||||
/* Restore vcpu */
|
/* Restore vcpu */
|
||||||
mfc0 a1, CP0_DDATA_LO
|
mfc0 a1, CP0_DDATA_LO
|
||||||
move s1, a1
|
move s1, a1
|
||||||
|
|
||||||
/* Restore run (vcpu->run) */
|
/* Restore run (vcpu->run) */
|
||||||
LONG_L a0, VCPU_RUN(a1)
|
LONG_L a0, VCPU_RUN(a1)
|
||||||
/* Save pointer to run in s0, will be saved by the compiler */
|
/* Save pointer to run in s0, will be saved by the compiler */
|
||||||
move s0, a0
|
move s0, a0
|
||||||
|
|
||||||
|
/* Save Host level EPC, BadVaddr and Cause to VCPU, useful to
|
||||||
|
* process the exception */
|
||||||
|
mfc0 k0,CP0_EPC
|
||||||
|
LONG_S k0, VCPU_PC(k1)
|
||||||
|
|
||||||
|
mfc0 k0, CP0_BADVADDR
|
||||||
|
LONG_S k0, VCPU_HOST_CP0_BADVADDR(k1)
|
||||||
|
|
||||||
|
mfc0 k0, CP0_CAUSE
|
||||||
|
LONG_S k0, VCPU_HOST_CP0_CAUSE(k1)
|
||||||
|
|
||||||
|
mfc0 k0, CP0_ENTRYHI
|
||||||
|
LONG_S k0, VCPU_HOST_ENTRYHI(k1)
|
||||||
|
|
||||||
|
/* Now restore the host state just enough to run the handlers */
|
||||||
|
|
||||||
|
/* Swtich EBASE to the one used by Linux */
|
||||||
|
/* load up the host EBASE */
|
||||||
|
mfc0 v0, CP0_STATUS
|
||||||
|
|
||||||
|
.set at
|
||||||
|
or k0, v0, ST0_BEV
|
||||||
|
.set noat
|
||||||
|
|
||||||
|
mtc0 k0, CP0_STATUS
|
||||||
|
ehb
|
||||||
|
|
||||||
|
LONG_L k0, VCPU_HOST_EBASE(k1)
|
||||||
|
mtc0 k0,CP0_EBASE
|
||||||
|
|
||||||
|
|
||||||
/* Save Host level EPC, BadVaddr and Cause to VCPU, useful to process the exception */
|
/* Now that the new EBASE has been loaded, unset BEV and KSU_USER */
|
||||||
mfc0 k0,CP0_EPC
|
.set at
|
||||||
LONG_S k0, VCPU_PC(k1)
|
and v0, v0, ~(ST0_EXL | KSU_USER | ST0_IE)
|
||||||
|
or v0, v0, ST0_CU0
|
||||||
|
.set noat
|
||||||
|
mtc0 v0, CP0_STATUS
|
||||||
|
ehb
|
||||||
|
|
||||||
mfc0 k0, CP0_BADVADDR
|
/* Load up host GP */
|
||||||
LONG_S k0, VCPU_HOST_CP0_BADVADDR(k1)
|
LONG_L gp, VCPU_HOST_GP(k1)
|
||||||
|
|
||||||
mfc0 k0, CP0_CAUSE
|
/* Need a stack before we can jump to "C" */
|
||||||
LONG_S k0, VCPU_HOST_CP0_CAUSE(k1)
|
LONG_L sp, VCPU_HOST_STACK(k1)
|
||||||
|
|
||||||
mfc0 k0, CP0_ENTRYHI
|
/* Saved host state */
|
||||||
LONG_S k0, VCPU_HOST_ENTRYHI(k1)
|
addiu sp, sp, -PT_SIZE
|
||||||
|
|
||||||
/* Now restore the host state just enough to run the handlers */
|
/* XXXKYMA do we need to load the host ASID, maybe not because the
|
||||||
|
* kernel entries are marked GLOBAL, need to verify
|
||||||
|
*/
|
||||||
|
|
||||||
/* Swtich EBASE to the one used by Linux */
|
/* Restore host DDATA_LO */
|
||||||
/* load up the host EBASE */
|
LONG_L k0, PT_HOST_USERLOCAL(sp)
|
||||||
mfc0 v0, CP0_STATUS
|
mtc0 k0, CP0_DDATA_LO
|
||||||
|
|
||||||
.set at
|
/* Restore RDHWR access */
|
||||||
or k0, v0, ST0_BEV
|
la k0, 0x2000000F
|
||||||
.set noat
|
mtc0 k0, CP0_HWRENA
|
||||||
|
|
||||||
mtc0 k0, CP0_STATUS
|
/* Jump to handler */
|
||||||
ehb
|
|
||||||
|
|
||||||
LONG_L k0, VCPU_HOST_EBASE(k1)
|
|
||||||
mtc0 k0,CP0_EBASE
|
|
||||||
|
|
||||||
|
|
||||||
/* Now that the new EBASE has been loaded, unset BEV and KSU_USER */
|
|
||||||
.set at
|
|
||||||
and v0, v0, ~(ST0_EXL | KSU_USER | ST0_IE)
|
|
||||||
or v0, v0, ST0_CU0
|
|
||||||
.set noat
|
|
||||||
mtc0 v0, CP0_STATUS
|
|
||||||
ehb
|
|
||||||
|
|
||||||
/* Load up host GP */
|
|
||||||
LONG_L gp, VCPU_HOST_GP(k1)
|
|
||||||
|
|
||||||
/* Need a stack before we can jump to "C" */
|
|
||||||
LONG_L sp, VCPU_HOST_STACK(k1)
|
|
||||||
|
|
||||||
/* Saved host state */
|
|
||||||
addiu sp,sp, -PT_SIZE
|
|
||||||
|
|
||||||
/* XXXKYMA do we need to load the host ASID, maybe not because the
|
|
||||||
* kernel entries are marked GLOBAL, need to verify
|
|
||||||
*/
|
|
||||||
|
|
||||||
/* Restore host DDATA_LO */
|
|
||||||
LONG_L k0, PT_HOST_USERLOCAL(sp)
|
|
||||||
mtc0 k0, CP0_DDATA_LO
|
|
||||||
|
|
||||||
/* Restore RDHWR access */
|
|
||||||
la k0, 0x2000000F
|
|
||||||
mtc0 k0, CP0_HWRENA
|
|
||||||
|
|
||||||
/* Jump to handler */
|
|
||||||
FEXPORT(__kvm_mips_jump_to_handler)
|
FEXPORT(__kvm_mips_jump_to_handler)
|
||||||
/* XXXKYMA: not sure if this is safe, how large is the stack?? */
|
/* XXXKYMA: not sure if this is safe, how large is the stack??
|
||||||
/* Now jump to the kvm_mips_handle_exit() to see if we can deal with this in the kernel */
|
* Now jump to the kvm_mips_handle_exit() to see if we can deal
|
||||||
la t9,kvm_mips_handle_exit
|
* with this in the kernel */
|
||||||
jalr.hb t9
|
la t9, kvm_mips_handle_exit
|
||||||
addiu sp,sp, -CALLFRAME_SIZ /* BD Slot */
|
jalr.hb t9
|
||||||
|
addiu sp, sp, -CALLFRAME_SIZ /* BD Slot */
|
||||||
|
|
||||||
/* Return from handler Make sure interrupts are disabled */
|
/* Return from handler Make sure interrupts are disabled */
|
||||||
di
|
di
|
||||||
ehb
|
ehb
|
||||||
|
|
||||||
/* XXXKYMA: k0/k1 could have been blown away if we processed an exception
|
/* XXXKYMA: k0/k1 could have been blown away if we processed
|
||||||
* while we were handling the exception from the guest, reload k1
|
* an exception while we were handling the exception from the
|
||||||
*/
|
* guest, reload k1
|
||||||
move k1, s1
|
*/
|
||||||
addiu k1, k1, VCPU_HOST_ARCH
|
|
||||||
|
|
||||||
/* Check return value, should tell us if we are returning to the host (handle I/O etc)
|
move k1, s1
|
||||||
* or resuming the guest
|
addiu k1, k1, VCPU_HOST_ARCH
|
||||||
*/
|
|
||||||
andi t0, v0, RESUME_HOST
|
/* Check return value, should tell us if we are returning to the
|
||||||
bnez t0, __kvm_mips_return_to_host
|
* host (handle I/O etc)or resuming the guest
|
||||||
nop
|
*/
|
||||||
|
andi t0, v0, RESUME_HOST
|
||||||
|
bnez t0, __kvm_mips_return_to_host
|
||||||
|
nop
|
||||||
|
|
||||||
__kvm_mips_return_to_guest:
|
__kvm_mips_return_to_guest:
|
||||||
/* Put the saved pointer to vcpu (s1) back into the DDATA_LO Register */
|
/* Put the saved pointer to vcpu (s1) back into the DDATA_LO Register */
|
||||||
mtc0 s1, CP0_DDATA_LO
|
mtc0 s1, CP0_DDATA_LO
|
||||||
|
|
||||||
/* Load up the Guest EBASE to minimize the window where BEV is set */
|
/* Load up the Guest EBASE to minimize the window where BEV is set */
|
||||||
LONG_L t0, VCPU_GUEST_EBASE(k1)
|
LONG_L t0, VCPU_GUEST_EBASE(k1)
|
||||||
|
|
||||||
/* Switch EBASE back to the one used by KVM */
|
/* Switch EBASE back to the one used by KVM */
|
||||||
mfc0 v1, CP0_STATUS
|
mfc0 v1, CP0_STATUS
|
||||||
.set at
|
.set at
|
||||||
or k0, v1, ST0_BEV
|
or k0, v1, ST0_BEV
|
||||||
.set noat
|
.set noat
|
||||||
mtc0 k0, CP0_STATUS
|
mtc0 k0, CP0_STATUS
|
||||||
ehb
|
ehb
|
||||||
mtc0 t0,CP0_EBASE
|
mtc0 t0, CP0_EBASE
|
||||||
|
|
||||||
/* Setup status register for running guest in UM */
|
|
||||||
.set at
|
|
||||||
or v1, v1, (ST0_EXL | KSU_USER | ST0_IE)
|
|
||||||
and v1, v1, ~ST0_CU0
|
|
||||||
.set noat
|
|
||||||
mtc0 v1, CP0_STATUS
|
|
||||||
ehb
|
|
||||||
|
|
||||||
|
/* Setup status register for running guest in UM */
|
||||||
|
.set at
|
||||||
|
or v1, v1, (ST0_EXL | KSU_USER | ST0_IE)
|
||||||
|
and v1, v1, ~ST0_CU0
|
||||||
|
.set noat
|
||||||
|
mtc0 v1, CP0_STATUS
|
||||||
|
ehb
|
||||||
|
|
||||||
/* Set Guest EPC */
|
/* Set Guest EPC */
|
||||||
LONG_L t0, VCPU_PC(k1)
|
LONG_L t0, VCPU_PC(k1)
|
||||||
mtc0 t0, CP0_EPC
|
mtc0 t0, CP0_EPC
|
||||||
|
|
||||||
/* Set the ASID for the Guest Kernel */
|
/* Set the ASID for the Guest Kernel */
|
||||||
sll t0, t0, 1 /* with kseg0 @ 0x40000000, kernel */
|
sll t0, t0, 1 /* with kseg0 @ 0x40000000, kernel */
|
||||||
/* addresses shift to 0x80000000 */
|
/* addresses shift to 0x80000000 */
|
||||||
bltz t0, 1f /* If kernel */
|
bltz t0, 1f /* If kernel */
|
||||||
addiu t1, k1, VCPU_GUEST_KERNEL_ASID /* (BD) */
|
addiu t1, k1, VCPU_GUEST_KERNEL_ASID /* (BD) */
|
||||||
addiu t1, k1, VCPU_GUEST_USER_ASID /* else user */
|
addiu t1, k1, VCPU_GUEST_USER_ASID /* else user */
|
||||||
1:
|
1:
|
||||||
/* t1: contains the base of the ASID array, need to get the cpu id */
|
/* t1: contains the base of the ASID array, need to get the cpu id */
|
||||||
LONG_L t2, TI_CPU($28) /* smp_processor_id */
|
LONG_L t2, TI_CPU($28) /* smp_processor_id */
|
||||||
sll t2, t2, 2 /* x4 */
|
sll t2, t2, 2 /* x4 */
|
||||||
addu t3, t1, t2
|
addu t3, t1, t2
|
||||||
LONG_L k0, (t3)
|
LONG_L k0, (t3)
|
||||||
andi k0, k0, 0xff
|
andi k0, k0, 0xff
|
||||||
mtc0 k0,CP0_ENTRYHI
|
mtc0 k0,CP0_ENTRYHI
|
||||||
ehb
|
ehb
|
||||||
|
|
||||||
/* Disable RDHWR access */
|
/* Disable RDHWR access */
|
||||||
mtc0 zero, CP0_HWRENA
|
mtc0 zero, CP0_HWRENA
|
||||||
|
|
||||||
/* load the guest context from VCPU and return */
|
/* load the guest context from VCPU and return */
|
||||||
LONG_L $0, VCPU_R0(k1)
|
LONG_L $0, VCPU_R0(k1)
|
||||||
LONG_L $1, VCPU_R1(k1)
|
LONG_L $1, VCPU_R1(k1)
|
||||||
LONG_L $2, VCPU_R2(k1)
|
LONG_L $2, VCPU_R2(k1)
|
||||||
LONG_L $3, VCPU_R3(k1)
|
LONG_L $3, VCPU_R3(k1)
|
||||||
LONG_L $4, VCPU_R4(k1)
|
LONG_L $4, VCPU_R4(k1)
|
||||||
LONG_L $5, VCPU_R5(k1)
|
LONG_L $5, VCPU_R5(k1)
|
||||||
LONG_L $6, VCPU_R6(k1)
|
LONG_L $6, VCPU_R6(k1)
|
||||||
LONG_L $7, VCPU_R7(k1)
|
LONG_L $7, VCPU_R7(k1)
|
||||||
LONG_L $8, VCPU_R8(k1)
|
LONG_L $8, VCPU_R8(k1)
|
||||||
LONG_L $9, VCPU_R9(k1)
|
LONG_L $9, VCPU_R9(k1)
|
||||||
LONG_L $10, VCPU_R10(k1)
|
LONG_L $10, VCPU_R10(k1)
|
||||||
LONG_L $11, VCPU_R11(k1)
|
LONG_L $11, VCPU_R11(k1)
|
||||||
LONG_L $12, VCPU_R12(k1)
|
LONG_L $12, VCPU_R12(k1)
|
||||||
LONG_L $13, VCPU_R13(k1)
|
LONG_L $13, VCPU_R13(k1)
|
||||||
LONG_L $14, VCPU_R14(k1)
|
LONG_L $14, VCPU_R14(k1)
|
||||||
LONG_L $15, VCPU_R15(k1)
|
LONG_L $15, VCPU_R15(k1)
|
||||||
LONG_L $16, VCPU_R16(k1)
|
LONG_L $16, VCPU_R16(k1)
|
||||||
LONG_L $17, VCPU_R17(k1)
|
LONG_L $17, VCPU_R17(k1)
|
||||||
LONG_L $18, VCPU_R18(k1)
|
LONG_L $18, VCPU_R18(k1)
|
||||||
LONG_L $19, VCPU_R19(k1)
|
LONG_L $19, VCPU_R19(k1)
|
||||||
LONG_L $20, VCPU_R20(k1)
|
LONG_L $20, VCPU_R20(k1)
|
||||||
LONG_L $21, VCPU_R21(k1)
|
LONG_L $21, VCPU_R21(k1)
|
||||||
LONG_L $22, VCPU_R22(k1)
|
LONG_L $22, VCPU_R22(k1)
|
||||||
LONG_L $23, VCPU_R23(k1)
|
LONG_L $23, VCPU_R23(k1)
|
||||||
LONG_L $24, VCPU_R24(k1)
|
LONG_L $24, VCPU_R24(k1)
|
||||||
LONG_L $25, VCPU_R25(k1)
|
LONG_L $25, VCPU_R25(k1)
|
||||||
|
|
||||||
/* $/k1 loaded later */
|
/* $/k1 loaded later */
|
||||||
LONG_L $28, VCPU_R28(k1)
|
LONG_L $28, VCPU_R28(k1)
|
||||||
LONG_L $29, VCPU_R29(k1)
|
LONG_L $29, VCPU_R29(k1)
|
||||||
LONG_L $30, VCPU_R30(k1)
|
LONG_L $30, VCPU_R30(k1)
|
||||||
LONG_L $31, VCPU_R31(k1)
|
LONG_L $31, VCPU_R31(k1)
|
||||||
|
|
||||||
FEXPORT(__kvm_mips_skip_guest_restore)
|
FEXPORT(__kvm_mips_skip_guest_restore)
|
||||||
LONG_L k0, VCPU_HI(k1)
|
LONG_L k0, VCPU_HI(k1)
|
||||||
mthi k0
|
mthi k0
|
||||||
|
|
||||||
LONG_L k0, VCPU_LO(k1)
|
LONG_L k0, VCPU_LO(k1)
|
||||||
mtlo k0
|
mtlo k0
|
||||||
|
|
||||||
LONG_L k0, VCPU_R26(k1)
|
LONG_L k0, VCPU_R26(k1)
|
||||||
LONG_L k1, VCPU_R27(k1)
|
LONG_L k1, VCPU_R27(k1)
|
||||||
|
|
||||||
eret
|
eret
|
||||||
|
|
||||||
__kvm_mips_return_to_host:
|
__kvm_mips_return_to_host:
|
||||||
/* EBASE is already pointing to Linux */
|
/* EBASE is already pointing to Linux */
|
||||||
LONG_L k1, VCPU_HOST_STACK(k1)
|
LONG_L k1, VCPU_HOST_STACK(k1)
|
||||||
addiu k1,k1, -PT_SIZE
|
addiu k1,k1, -PT_SIZE
|
||||||
|
|
||||||
/* Restore host DDATA_LO */
|
/* Restore host DDATA_LO */
|
||||||
LONG_L k0, PT_HOST_USERLOCAL(k1)
|
LONG_L k0, PT_HOST_USERLOCAL(k1)
|
||||||
mtc0 k0, CP0_DDATA_LO
|
mtc0 k0, CP0_DDATA_LO
|
||||||
|
|
||||||
/* Restore host ASID */
|
/* Restore host ASID */
|
||||||
LONG_L k0, PT_HOST_ASID(sp)
|
LONG_L k0, PT_HOST_ASID(sp)
|
||||||
andi k0, 0xff
|
andi k0, 0xff
|
||||||
mtc0 k0,CP0_ENTRYHI
|
mtc0 k0,CP0_ENTRYHI
|
||||||
ehb
|
ehb
|
||||||
|
|
||||||
/* Load context saved on the host stack */
|
/* Load context saved on the host stack */
|
||||||
LONG_L $0, PT_R0(k1)
|
LONG_L $0, PT_R0(k1)
|
||||||
LONG_L $1, PT_R1(k1)
|
LONG_L $1, PT_R1(k1)
|
||||||
|
|
||||||
/* r2/v0 is the return code, shift it down by 2 (arithmetic) to recover the err code */
|
/* r2/v0 is the return code, shift it down by 2 (arithmetic)
|
||||||
sra k0, v0, 2
|
* to recover the err code */
|
||||||
move $2, k0
|
sra k0, v0, 2
|
||||||
|
move $2, k0
|
||||||
|
|
||||||
LONG_L $3, PT_R3(k1)
|
LONG_L $3, PT_R3(k1)
|
||||||
LONG_L $4, PT_R4(k1)
|
LONG_L $4, PT_R4(k1)
|
||||||
LONG_L $5, PT_R5(k1)
|
LONG_L $5, PT_R5(k1)
|
||||||
LONG_L $6, PT_R6(k1)
|
LONG_L $6, PT_R6(k1)
|
||||||
LONG_L $7, PT_R7(k1)
|
LONG_L $7, PT_R7(k1)
|
||||||
LONG_L $8, PT_R8(k1)
|
LONG_L $8, PT_R8(k1)
|
||||||
LONG_L $9, PT_R9(k1)
|
LONG_L $9, PT_R9(k1)
|
||||||
LONG_L $10, PT_R10(k1)
|
LONG_L $10, PT_R10(k1)
|
||||||
LONG_L $11, PT_R11(k1)
|
LONG_L $11, PT_R11(k1)
|
||||||
LONG_L $12, PT_R12(k1)
|
LONG_L $12, PT_R12(k1)
|
||||||
LONG_L $13, PT_R13(k1)
|
LONG_L $13, PT_R13(k1)
|
||||||
LONG_L $14, PT_R14(k1)
|
LONG_L $14, PT_R14(k1)
|
||||||
LONG_L $15, PT_R15(k1)
|
LONG_L $15, PT_R15(k1)
|
||||||
LONG_L $16, PT_R16(k1)
|
LONG_L $16, PT_R16(k1)
|
||||||
LONG_L $17, PT_R17(k1)
|
LONG_L $17, PT_R17(k1)
|
||||||
LONG_L $18, PT_R18(k1)
|
LONG_L $18, PT_R18(k1)
|
||||||
LONG_L $19, PT_R19(k1)
|
LONG_L $19, PT_R19(k1)
|
||||||
LONG_L $20, PT_R20(k1)
|
LONG_L $20, PT_R20(k1)
|
||||||
LONG_L $21, PT_R21(k1)
|
LONG_L $21, PT_R21(k1)
|
||||||
LONG_L $22, PT_R22(k1)
|
LONG_L $22, PT_R22(k1)
|
||||||
LONG_L $23, PT_R23(k1)
|
LONG_L $23, PT_R23(k1)
|
||||||
LONG_L $24, PT_R24(k1)
|
LONG_L $24, PT_R24(k1)
|
||||||
LONG_L $25, PT_R25(k1)
|
LONG_L $25, PT_R25(k1)
|
||||||
|
|
||||||
/* Host k0/k1 were not saved */
|
/* Host k0/k1 were not saved */
|
||||||
|
|
||||||
LONG_L $28, PT_R28(k1)
|
LONG_L $28, PT_R28(k1)
|
||||||
LONG_L $29, PT_R29(k1)
|
LONG_L $29, PT_R29(k1)
|
||||||
LONG_L $30, PT_R30(k1)
|
LONG_L $30, PT_R30(k1)
|
||||||
|
|
||||||
LONG_L k0, PT_HI(k1)
|
LONG_L k0, PT_HI(k1)
|
||||||
mthi k0
|
mthi k0
|
||||||
|
|
||||||
LONG_L k0, PT_LO(k1)
|
LONG_L k0, PT_LO(k1)
|
||||||
mtlo k0
|
mtlo k0
|
||||||
|
|
||||||
/* Restore RDHWR access */
|
/* Restore RDHWR access */
|
||||||
la k0, 0x2000000F
|
la k0, 0x2000000F
|
||||||
mtc0 k0, CP0_HWRENA
|
mtc0 k0, CP0_HWRENA
|
||||||
|
|
||||||
|
|
||||||
/* Restore RA, which is the address we will return to */
|
/* Restore RA, which is the address we will return to */
|
||||||
LONG_L ra, PT_R31(k1)
|
LONG_L ra, PT_R31(k1)
|
||||||
j ra
|
j ra
|
||||||
nop
|
nop
|
||||||
|
|
||||||
.set pop
|
.set pop
|
||||||
VECTOR_END(MIPSX(GuestExceptionEnd))
|
VECTOR_END(MIPSX(GuestExceptionEnd))
|
||||||
.end MIPSX(GuestException)
|
.end MIPSX(GuestException)
|
||||||
|
|
||||||
@ -627,24 +635,23 @@ MIPSX(exceptions):
|
|||||||
|
|
||||||
#define HW_SYNCI_Step $1
|
#define HW_SYNCI_Step $1
|
||||||
LEAF(MIPSX(SyncICache))
|
LEAF(MIPSX(SyncICache))
|
||||||
.set push
|
.set push
|
||||||
.set mips32r2
|
.set mips32r2
|
||||||
beq a1, zero, 20f
|
beq a1, zero, 20f
|
||||||
nop
|
nop
|
||||||
addu a1, a0, a1
|
addu a1, a0, a1
|
||||||
rdhwr v0, HW_SYNCI_Step
|
rdhwr v0, HW_SYNCI_Step
|
||||||
beq v0, zero, 20f
|
beq v0, zero, 20f
|
||||||
nop
|
nop
|
||||||
|
|
||||||
10:
|
10:
|
||||||
synci 0(a0)
|
synci 0(a0)
|
||||||
addu a0, a0, v0
|
addu a0, a0, v0
|
||||||
sltu v1, a0, a1
|
sltu v1, a0, a1
|
||||||
bne v1, zero, 10b
|
bne v1, zero, 10b
|
||||||
nop
|
nop
|
||||||
sync
|
sync
|
||||||
20:
|
20:
|
||||||
jr.hb ra
|
jr.hb ra
|
||||||
nop
|
nop
|
||||||
.set pop
|
.set pop
|
||||||
END(MIPSX(SyncICache))
|
END(MIPSX(SyncICache))
|
||||||
|
|||||||
Reference in New Issue
Block a user