#define REBOLT_SLB_ENTRY(num) \
ld r10, SHADOW_SLB_ESID(num)(r11); \
cmpdi r10, 0; \
- beq slb_exit_skip_1; \
+ beq slb_exit_skip_ ## num; \
oris r10, r10, SLB_ESID_V@h; \
ld r9, SHADOW_SLB_VSID(num)(r11); \
slbmte r9, r10; \
*
* MSR = ~IR|DR
* R13 = PACA
+ * R1 = host R1
+ * R2 = host R2
* R9 = guest IP
* R10 = guest MSR
- * R11 = free
- * R12 = free
- * PACA[PACA_EXMC + EX_R9] = guest R9
- * PACA[PACA_EXMC + EX_R10] = guest R10
- * PACA[PACA_EXMC + EX_R11] = guest R11
- * PACA[PACA_EXMC + EX_R12] = guest R12
- * PACA[PACA_EXMC + EX_R13] = guest R13
- * PACA[PACA_EXMC + EX_CCR] = guest CR
- * PACA[PACA_EXMC + EX_R3] = guest XER
+ * all other GPRS = free
+ * PACA[KVM_CR] = guest CR
+ * PACA[KVM_XER] = guest XER
*/
mtsrr0 r9
mtsrr1 r10
- mtspr SPRN_SPRG_SCRATCH0, r0
+ /* Activate guest mode, so faults get handled by KVM */
+ li r11, KVM_GUEST_MODE_GUEST
+ stb r11, PACA_KVM_IN_GUEST(r13)
/* Remove LPAR shadow entries */
/* Enter guest */
- mfspr r0, SPRN_SPRG_SCRATCH0
-
- ld r9, (PACA_EXMC+EX_R9)(r13)
- ld r10, (PACA_EXMC+EX_R10)(r13)
- ld r12, (PACA_EXMC+EX_R12)(r13)
-
- lwz r11, (PACA_EXMC+EX_CCR)(r13)
+ ld r0, (PACA_KVM_R0)(r13)
+ ld r1, (PACA_KVM_R1)(r13)
+ ld r2, (PACA_KVM_R2)(r13)
+ ld r3, (PACA_KVM_R3)(r13)
+ ld r4, (PACA_KVM_R4)(r13)
+ ld r5, (PACA_KVM_R5)(r13)
+ ld r6, (PACA_KVM_R6)(r13)
+ ld r7, (PACA_KVM_R7)(r13)
+ ld r8, (PACA_KVM_R8)(r13)
+ ld r9, (PACA_KVM_R9)(r13)
+ ld r10, (PACA_KVM_R10)(r13)
+ ld r12, (PACA_KVM_R12)(r13)
+
+ lwz r11, (PACA_KVM_CR)(r13)
mtcr r11
- ld r11, (PACA_EXMC+EX_R3)(r13)
+ ld r11, (PACA_KVM_XER)(r13)
mtxer r11
- ld r11, (PACA_EXMC+EX_R11)(r13)
- ld r13, (PACA_EXMC+EX_R13)(r13)
+ ld r11, (PACA_KVM_R11)(r13)
+ ld r13, (PACA_KVM_R13)(r13)
RFI
kvmppc_handler_trampoline_enter_end:
/* Register usage at this point:
*
- * SPRG_SCRATCH0 = guest R13
- * R01 = host R1
- * R02 = host R2
- * R10 = guest PC
- * R11 = guest MSR
- * R12 = exit handler id
- * R13 = PACA
- * PACA.exmc.CCR = guest CR
- * 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
+ * SPRG_SCRATCH0 = guest R13
+ * R12 = exit handler id
+ * R13 = PACA
+ * PACA.KVM.SCRATCH0 = guest R12
+ * PACA.KVM.SCRATCH1 = guest CR
*
*/
/* Save registers */
- std r0, (PACA_EXMC+EX_SRR0)(r13)
- std r9, (PACA_EXMC+EX_R3)(r13)
- std r10, (PACA_EXMC+EX_LR)(r13)
- std r11, (PACA_EXMC+EX_DAR)(r13)
+ std r0, PACA_KVM_R0(r13)
+ std r1, PACA_KVM_R1(r13)
+ std r2, PACA_KVM_R2(r13)
+ std r3, PACA_KVM_R3(r13)
+ std r4, PACA_KVM_R4(r13)
+ std r5, PACA_KVM_R5(r13)
+ std r6, PACA_KVM_R6(r13)
+ std r7, PACA_KVM_R7(r13)
+ std r8, PACA_KVM_R8(r13)
+ std r9, PACA_KVM_R9(r13)
+ std r10, PACA_KVM_R10(r13)
+ std r11, PACA_KVM_R11(r13)
+
+ /* Restore R1/R2 so we can handle faults */
+ ld r1, PACA_KVM_HOST_R1(r13)
+ ld r2, PACA_KVM_HOST_R2(r13)
+
+ /* Save guest PC and MSR in GPRs */
+ mfsrr0 r3
+ mfsrr1 r4
+
+ /* Get scratch'ed off registers */
+ mfspr r9, SPRN_SPRG_SCRATCH0
+ std r9, PACA_KVM_R13(r13)
+
+ ld r8, PACA_KVM_SCRATCH0(r13)
+ std r8, PACA_KVM_R12(r13)
+
+ lwz r7, PACA_KVM_SCRATCH1(r13)
+ stw r7, PACA_KVM_CR(r13)
+
+ /* Save more register state */
+
+ mfxer r6
+ stw r6, PACA_KVM_XER(r13)
+
+ mfdar r5
+ mfdsisr r6
/*
* In order for us to easily get the last instruction,
ld_last_inst:
/* Save off the guest instruction we're at */
+
+ /* Set guest mode to 'jump over instruction' so if lwz faults
+ * we'll just continue at the next IP. */
+ li r9, KVM_GUEST_MODE_SKIP
+ stb r9, PACA_KVM_IN_GUEST(r13)
+
/* 1) enable paging for data */
mfmsr r9
ori r11, r9, MSR_DR /* Enable paging for data */
mtmsr r11
/* 2) fetch the instruction */
- lwz r0, 0(r10)
+ li r0, KVM_INST_FETCH_FAILED /* In case lwz faults */
+ lwz r0, 0(r3)
/* 3) disable paging again */
mtmsr r9
no_ld_last_inst:
+ /* Unset guest mode */
+ li r9, KVM_GUEST_MODE_NONE
+ stb r9, PACA_KVM_IN_GUEST(r13)
+
/* Restore bolted entries from the shadow and fix it along the way */
/* We don't store anything in entry 0, so we don't need to take care of it */
slb_do_exit:
- /* Restore registers */
-
- ld r11, (PACA_EXMC+EX_DAR)(r13)
- ld r10, (PACA_EXMC+EX_LR)(r13)
- ld r9, (PACA_EXMC+EX_R3)(r13)
-
- /* Save last inst */
- stw r0, (PACA_EXMC+EX_LR)(r13)
-
- /* Save DAR and DSISR before going to paged mode */
- mfdar r0
- std r0, (PACA_EXMC+EX_DAR)(r13)
- mfdsisr r0
- stw r0, (PACA_EXMC+EX_DSISR)(r13)
+ /* Register usage at this point:
+ *
+ * R0 = guest last inst
+ * R1 = host R1
+ * R2 = host R2
+ * R3 = guest PC
+ * R4 = guest MSR
+ * R5 = guest DAR
+ * R6 = guest DSISR
+ * R12 = exit handler id
+ * R13 = PACA
+ * PACA.KVM.* = guest *
+ *
+ */
/* RFI into the highmem handler */
- mfmsr r0
- ori r0, r0, MSR_IR|MSR_DR|MSR_RI /* Enable paging */
- mtsrr1 r0
- ld r0, PACASAVEDMSR(r13) /* Highmem handler address */
- mtsrr0 r0
-
- mfspr r0, SPRN_SPRG_SCRATCH0
+ mfmsr r7
+ ori r7, r7, MSR_IR|MSR_DR|MSR_RI /* Enable paging */
+ mtsrr1 r7
+ ld r8, PACA_KVM_VMHANDLER(r13) /* Highmem handler address */
+ mtsrr0 r8
RFI
kvmppc_handler_trampoline_exit_end:
git.openpandora.org / pandora-kernel.git / blobdiff