diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_interrupts.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_interrupts.S | 392 |
1 files changed, 0 insertions, 392 deletions
diff --git a/arch/powerpc/kvm/book3s_64_interrupts.S b/arch/powerpc/kvm/book3s_64_interrupts.S deleted file mode 100644 index 7b55d8094c8b..000000000000 --- a/arch/powerpc/kvm/book3s_64_interrupts.S +++ /dev/null @@ -1,392 +0,0 @@ -/* - * 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/page.h> -#include <asm/asm-offsets.h> -#include <asm/exception-64s.h> - -#define KVMPPC_HANDLE_EXIT .kvmppc_handle_exit -#define ULONG_SIZE 8 -#define VCPU_GPR(n) (VCPU_GPRS + (n * ULONG_SIZE)) - -.macro mfpaca tmp_reg, src_reg, offset, vcpu_reg - ld \tmp_reg, (PACA_EXMC+\offset)(r13) - std \tmp_reg, VCPU_GPR(\src_reg)(\vcpu_reg) -.endm - -.macro DISABLE_INTERRUPTS - mfmsr r0 - rldicl r0,r0,48,1 - rotldi r0,r0,16 - mtmsrd r0,1 -.endm - -/***************************************************************************** - * * - * Guest entry / exit code that is in kernel module memory (highmem) * - * * - ****************************************************************************/ - -/* Registers: - * r3: kvm_run pointer - * r4: vcpu pointer - */ -_GLOBAL(__kvmppc_vcpu_entry) - -kvm_start_entry: - /* Write correct stack frame */ - mflr r0 - std r0,16(r1) - - /* Save host state to the stack */ - stdu r1, -SWITCH_FRAME_SIZE(r1) - - /* Save r3 (kvm_run) and r4 (vcpu) */ - SAVE_2GPRS(3, r1) - - /* Save non-volatile registers (r14 - r31) */ - SAVE_NVGPRS(r1) - - /* Save LR */ - mflr r14 - std r14, _LINK(r1) - -/* XXX optimize non-volatile loading away */ -kvm_start_lightweight: - - DISABLE_INTERRUPTS - - /* Save R1/R2 in the PACA */ - std r1, PACAR1(r13) - std r2, (PACA_EXMC+EX_SRR0)(r13) - ld r3, VCPU_HIGHMEM_HANDLER(r4) - std r3, PACASAVEDMSR(r13) - - /* Load non-volatile guest state from the vcpu */ - ld r14, VCPU_GPR(r14)(r4) - ld r15, VCPU_GPR(r15)(r4) - ld r16, VCPU_GPR(r16)(r4) - ld r17, VCPU_GPR(r17)(r4) - ld r18, VCPU_GPR(r18)(r4) - ld r19, VCPU_GPR(r19)(r4) - ld r20, VCPU_GPR(r20)(r4) - ld r21, VCPU_GPR(r21)(r4) - ld r22, VCPU_GPR(r22)(r4) - ld r23, VCPU_GPR(r23)(r4) - ld r24, VCPU_GPR(r24)(r4) - ld r25, VCPU_GPR(r25)(r4) - ld r26, VCPU_GPR(r26)(r4) - ld r27, VCPU_GPR(r27)(r4) - ld r28, VCPU_GPR(r28)(r4) - ld r29, VCPU_GPR(r29)(r4) - ld r30, VCPU_GPR(r30)(r4) - ld r31, VCPU_GPR(r31)(r4) - - ld r9, VCPU_PC(r4) /* r9 = vcpu->arch.pc */ - ld r10, VCPU_SHADOW_MSR(r4) /* r10 = vcpu->arch.shadow_msr */ - - ld r3, VCPU_TRAMPOLINE_ENTER(r4) - mtsrr0 r3 - - LOAD_REG_IMMEDIATE(r3, MSR_KERNEL & ~(MSR_IR | MSR_DR)) - mtsrr1 r3 - - /* Load guest state in the respective registers */ - lwz r3, VCPU_CR(r4) /* r3 = vcpu->arch.cr */ - stw r3, (PACA_EXMC + EX_CCR)(r13) - - ld r3, VCPU_CTR(r4) /* r3 = vcpu->arch.ctr */ - mtctr r3 /* CTR = r3 */ - - ld r3, VCPU_LR(r4) /* r3 = vcpu->arch.lr */ - mtlr r3 /* LR = r3 */ - - ld r3, VCPU_XER(r4) /* r3 = vcpu->arch.xer */ - std r3, (PACA_EXMC + EX_R3)(r13) - - /* Some guests may need to have dcbz set to 32 byte length. - * - * Usually we ensure that by patching the guest's instructions - * to trap on dcbz and emulate it in the hypervisor. - * - * If we can, we should tell the CPU to use 32 byte dcbz though, - * because that's a lot faster. - */ - - ld r3, VCPU_HFLAGS(r4) - rldicl. r3, r3, 0, 63 /* CR = ((r3 & 1) == 0) */ - beq no_dcbz32_on - - mfspr r3,SPRN_HID5 - ori r3, r3, 0x80 /* XXX HID5_dcbz32 = 0x80 */ - mtspr SPRN_HID5,r3 - -no_dcbz32_on: - /* Load guest GPRs */ - - ld r3, VCPU_GPR(r9)(r4) - std r3, (PACA_EXMC + EX_R9)(r13) - ld r3, VCPU_GPR(r10)(r4) - std r3, (PACA_EXMC + EX_R10)(r13) - ld r3, VCPU_GPR(r11)(r4) - std r3, (PACA_EXMC + EX_R11)(r13) - ld r3, VCPU_GPR(r12)(r4) - std r3, (PACA_EXMC + EX_R12)(r13) - ld r3, VCPU_GPR(r13)(r4) - std r3, (PACA_EXMC + EX_R13)(r13) - - ld r0, VCPU_GPR(r0)(r4) - ld r1, VCPU_GPR(r1)(r4) - ld r2, VCPU_GPR(r2)(r4) - ld r3, VCPU_GPR(r3)(r4) - ld r5, VCPU_GPR(r5)(r4) - ld r6, VCPU_GPR(r6)(r4) - ld r7, VCPU_GPR(r7)(r4) - ld r8, VCPU_GPR(r8)(r4) - ld r4, VCPU_GPR(r4)(r4) - - /* This sets the Magic value for the trampoline */ - - li r11, 1 - stb r11, PACA_KVM_IN_GUEST(r13) - - /* Jump to SLB patching handlder and into our guest */ - RFI - -/* - * This is the handler in module memory. It gets jumped at from the - * lowmem trampoline code, so it's basically the guest exit code. - * - */ - -.global kvmppc_handler_highmem -kvmppc_handler_highmem: - - /* - * Register usage at this point: - * - * R00 = guest R13 - * R01 = host R1 - * R02 = host R2 - * R10 = guest PC - * R11 = guest MSR - * R12 = exit handler id - * R13 = PACA - * PACA.exmc.R9 = guest R1 - * PACA.exmc.R10 = guest R10 - * PACA.exmc.R11 = guest R11 - * PACA.exmc.R12 = guest R12 - * PACA.exmc.R13 = guest R2 - * PACA.exmc.DAR = guest DAR - * PACA.exmc.DSISR = guest DSISR - * PACA.exmc.LR = guest instruction - * PACA.exmc.CCR = guest CR - * PACA.exmc.SRR0 = guest R0 - * - */ - - std r3, (PACA_EXMC+EX_R3)(r13) - - /* save the exit id in R3 */ - mr r3, r12 - - /* R12 = vcpu */ - ld r12, GPR4(r1) - - /* Now save the guest state */ - - std r0, VCPU_GPR(r13)(r12) - std r4, VCPU_GPR(r4)(r12) - std r5, VCPU_GPR(r5)(r12) - std r6, VCPU_GPR(r6)(r12) - std r7, VCPU_GPR(r7)(r12) - std r8, VCPU_GPR(r8)(r12) - std r9, VCPU_GPR(r9)(r12) - - /* get registers from PACA */ - mfpaca r5, r0, EX_SRR0, r12 - mfpaca r5, r3, EX_R3, r12 - mfpaca r5, r1, EX_R9, r12 - mfpaca r5, r10, EX_R10, r12 - mfpaca r5, r11, EX_R11, r12 - mfpaca r5, r12, EX_R12, r12 - mfpaca r5, r2, EX_R13, r12 - - lwz r5, (PACA_EXMC+EX_LR)(r13) - stw r5, VCPU_LAST_INST(r12) - - lwz r5, (PACA_EXMC+EX_CCR)(r13) - stw r5, VCPU_CR(r12) - - ld r5, VCPU_HFLAGS(r12) - rldicl. r5, r5, 0, 63 /* CR = ((r5 & 1) == 0) */ - beq no_dcbz32_off - - mfspr r5,SPRN_HID5 - rldimi r5,r5,6,56 - mtspr SPRN_HID5,r5 - -no_dcbz32_off: - - /* XXX maybe skip on lightweight? */ - std r14, VCPU_GPR(r14)(r12) - std r15, VCPU_GPR(r15)(r12) - std r16, VCPU_GPR(r16)(r12) - std r17, VCPU_GPR(r17)(r12) - std r18, VCPU_GPR(r18)(r12) - std r19, VCPU_GPR(r19)(r12) - std r20, VCPU_GPR(r20)(r12) - std r21, VCPU_GPR(r21)(r12) - std r22, VCPU_GPR(r22)(r12) - std r23, VCPU_GPR(r23)(r12) - std r24, VCPU_GPR(r24)(r12) - std r25, VCPU_GPR(r25)(r12) - std r26, VCPU_GPR(r26)(r12) - std r27, VCPU_GPR(r27)(r12) - std r28, VCPU_GPR(r28)(r12) - std r29, VCPU_GPR(r29)(r12) - std r30, VCPU_GPR(r30)(r12) - std r31, VCPU_GPR(r31)(r12) - - /* Restore non-volatile host registers (r14 - r31) */ - REST_NVGPRS(r1) - - /* Save guest PC (R10) */ - std r10, VCPU_PC(r12) - - /* Save guest msr (R11) */ - std r11, VCPU_SHADOW_MSR(r12) - - /* Save guest CTR (in R12) */ - mfctr r5 - std r5, VCPU_CTR(r12) - - /* Save guest LR */ - mflr r5 - std r5, VCPU_LR(r12) - - /* Save guest XER */ - mfxer r5 - std r5, VCPU_XER(r12) - - /* Save guest DAR */ - ld r5, (PACA_EXMC+EX_DAR)(r13) - std r5, VCPU_FAULT_DEAR(r12) - - /* Save guest DSISR */ - lwz r5, (PACA_EXMC+EX_DSISR)(r13) - std r5, VCPU_FAULT_DSISR(r12) - - /* Restore host msr -> SRR1 */ - ld r7, VCPU_HOST_MSR(r12) - mtsrr1 r7 - - /* Restore host IP -> SRR0 */ - ld r6, VCPU_HOST_RETIP(r12) - mtsrr0 r6 - - /* - * For some interrupts, we need to call the real Linux - * handler, so it can do work for us. This has to happen - * as if the interrupt arrived from the kernel though, - * so let's fake it here where most state is restored. - * - * Call Linux for hardware interrupts/decrementer - * r3 = address of interrupt handler (exit reason) - */ - - cmpwi r3, BOOK3S_INTERRUPT_EXTERNAL - beq call_linux_handler - cmpwi r3, BOOK3S_INTERRUPT_DECREMENTER - beq call_linux_handler - - /* Back to Interruptable Mode! (goto kvm_return_point) */ - RFI - -call_linux_handler: - - /* - * If we land here we need to jump back to the handler we - * came from. - * - * We have a page that we can access from real mode, so let's - * jump back to that and use it as a trampoline to get back into the - * interrupt handler! - * - * R3 still contains the exit code, - * R6 VCPU_HOST_RETIP and - * R7 VCPU_HOST_MSR - */ - - mtlr r3 - - ld r5, VCPU_TRAMPOLINE_LOWMEM(r12) - mtsrr0 r5 - LOAD_REG_IMMEDIATE(r5, MSR_KERNEL & ~(MSR_IR | MSR_DR)) - mtsrr1 r5 - - RFI - -.global kvm_return_point -kvm_return_point: - - /* Jump back to lightweight entry if we're supposed to */ - /* go back into the guest */ - mr r5, r3 - /* Restore r3 (kvm_run) and r4 (vcpu) */ - REST_2GPRS(3, r1) - bl KVMPPC_HANDLE_EXIT - -#if 0 /* XXX get lightweight exits back */ - cmpwi r3, RESUME_GUEST - bne kvm_exit_heavyweight - - /* put VCPU and KVM_RUN back into place and roll again! */ - REST_2GPRS(3, r1) - b kvm_start_lightweight - -kvm_exit_heavyweight: - /* Restore non-volatile host registers */ - ld r14, _LINK(r1) - mtlr r14 - REST_NVGPRS(r1) - - addi r1, r1, SWITCH_FRAME_SIZE -#else - ld r4, _LINK(r1) - mtlr r4 - - cmpwi r3, RESUME_GUEST - bne kvm_exit_heavyweight - - REST_2GPRS(3, r1) - - addi r1, r1, SWITCH_FRAME_SIZE - - b kvm_start_entry - -kvm_exit_heavyweight: - - addi r1, r1, SWITCH_FRAME_SIZE -#endif - - blr |