diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rmhandlers.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 305 |
1 files changed, 45 insertions, 260 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index edb2ccdbb2ba..10554df13852 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -94,20 +94,12 @@ END_FTR_SECTION_IFSET(CPU_FTR_PMAO_BUG) lwz r6, HSTATE_PMC + 12(r13) lwz r8, HSTATE_PMC + 16(r13) lwz r9, HSTATE_PMC + 20(r13) -BEGIN_FTR_SECTION - lwz r10, HSTATE_PMC + 24(r13) - lwz r11, HSTATE_PMC + 28(r13) -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201) mtspr SPRN_PMC1, r3 mtspr SPRN_PMC2, r4 mtspr SPRN_PMC3, r5 mtspr SPRN_PMC4, r6 mtspr SPRN_PMC5, r8 mtspr SPRN_PMC6, r9 -BEGIN_FTR_SECTION - mtspr SPRN_PMC7, r10 - mtspr SPRN_PMC8, r11 -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201) ld r3, HSTATE_MMCR(r13) ld r4, HSTATE_MMCR + 8(r13) ld r5, HSTATE_MMCR + 16(r13) @@ -153,11 +145,9 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) cmpwi cr1, r12, BOOK3S_INTERRUPT_MACHINE_CHECK cmpwi r12, BOOK3S_INTERRUPT_EXTERNAL -BEGIN_FTR_SECTION beq 11f cmpwi cr2, r12, BOOK3S_INTERRUPT_HMI beq cr2, 14f /* HMI check */ -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) /* RFI into the highmem handler, or branch to interrupt handler */ mfmsr r6 @@ -166,7 +156,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) mtmsrd r6, 1 /* Clear RI in MSR */ mtsrr0 r8 mtsrr1 r7 - beqa 0x500 /* external interrupt (PPC970) */ beq cr1, 13f /* machine check */ RFI @@ -201,8 +190,6 @@ kvmppc_primary_no_guest: bge kvm_novcpu_exit /* another thread already exiting */ li r3, NAPPING_NOVCPU stb r3, HSTATE_NAPPING(r13) - li r3, 1 - stb r3, HSTATE_HWTHREAD_REQ(r13) b kvm_do_nap @@ -293,6 +280,8 @@ kvm_start_guest: /* if we have no vcpu to run, go back to sleep */ beq kvm_no_guest +kvm_secondary_got_guest: + /* Set HSTATE_DSCR(r13) to something sensible */ ld r6, PACA_DSCR(r13) std r6, HSTATE_DSCR(r13) @@ -318,27 +307,46 @@ kvm_start_guest: stwcx. r3, 0, r4 bne 51b +/* + * At this point we have finished executing in the guest. + * We need to wait for hwthread_req to become zero, since + * we may not turn on the MMU while hwthread_req is non-zero. + * While waiting we also need to check if we get given a vcpu to run. + */ kvm_no_guest: - li r0, KVM_HWTHREAD_IN_NAP + lbz r3, HSTATE_HWTHREAD_REQ(r13) + cmpwi r3, 0 + bne 53f + HMT_MEDIUM + li r0, KVM_HWTHREAD_IN_KERNEL stb r0, HSTATE_HWTHREAD_STATE(r13) -kvm_do_nap: - /* Clear the runlatch bit before napping */ - mfspr r2, SPRN_CTRLF - clrrdi r2, r2, 1 - mtspr SPRN_CTRLT, r2 - + /* need to recheck hwthread_req after a barrier, to avoid race */ + sync + lbz r3, HSTATE_HWTHREAD_REQ(r13) + cmpwi r3, 0 + bne 54f +/* + * We jump to power7_wakeup_loss, which will return to the caller + * of power7_nap in the powernv cpu offline loop. The value we + * put in r3 becomes the return value for power7_nap. + */ li r3, LPCR_PECE0 mfspr r4, SPRN_LPCR rlwimi r4, r3, 0, LPCR_PECE0 | LPCR_PECE1 mtspr SPRN_LPCR, r4 - isync - std r0, HSTATE_SCRATCH0(r13) - ptesync - ld r0, HSTATE_SCRATCH0(r13) -1: cmpd r0, r0 - bne 1b - nap - b . + li r3, 0 + b power7_wakeup_loss + +53: HMT_LOW + ld r4, HSTATE_KVM_VCPU(r13) + cmpdi r4, 0 + beq kvm_no_guest + HMT_MEDIUM + b kvm_secondary_got_guest + +54: li r0, KVM_HWTHREAD_IN_KVM + stb r0, HSTATE_HWTHREAD_STATE(r13) + b kvm_no_guest /****************************************************************************** * * @@ -374,11 +382,8 @@ kvmppc_hv_entry: slbia ptesync -BEGIN_FTR_SECTION - b 30f -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201) /* - * POWER7 host -> guest partition switch code. + * POWER7/POWER8 host -> guest partition switch code. * We don't have to lock against concurrent tlbies, * but we do have to coordinate across hardware threads. */ @@ -486,97 +491,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) cmpwi r3,512 /* 1 microsecond */ li r12,BOOK3S_INTERRUPT_HV_DECREMENTER blt hdec_soon - b 31f - - /* - * PPC970 host -> guest partition switch code. - * We have to lock against concurrent tlbies, - * using native_tlbie_lock to lock against host tlbies - * and kvm->arch.tlbie_lock to lock against guest tlbies. - * We also have to invalidate the TLB since its - * entries aren't tagged with the LPID. - */ -30: ld r5,HSTATE_KVM_VCORE(r13) - ld r9,VCORE_KVM(r5) /* pointer to struct kvm */ - - /* first take native_tlbie_lock */ - .section ".toc","aw" -toc_tlbie_lock: - .tc native_tlbie_lock[TC],native_tlbie_lock - .previous - ld r3,toc_tlbie_lock@toc(r2) -#ifdef __BIG_ENDIAN__ - lwz r8,PACA_LOCK_TOKEN(r13) -#else - lwz r8,PACAPACAINDEX(r13) -#endif -24: lwarx r0,0,r3 - cmpwi r0,0 - bne 24b - stwcx. r8,0,r3 - bne 24b - isync - - ld r5,HSTATE_KVM_VCORE(r13) - ld r7,VCORE_LPCR(r5) /* use vcore->lpcr to store HID4 */ - li r0,0x18f - rotldi r0,r0,HID4_LPID5_SH /* all lpid bits in HID4 = 1 */ - or r0,r7,r0 - ptesync - sync - mtspr SPRN_HID4,r0 /* switch to reserved LPID */ - isync - li r0,0 - stw r0,0(r3) /* drop native_tlbie_lock */ - - /* invalidate the whole TLB */ - li r0,256 - mtctr r0 - li r6,0 -25: tlbiel r6 - addi r6,r6,0x1000 - bdnz 25b - ptesync - - /* Take the guest's tlbie_lock */ - addi r3,r9,KVM_TLBIE_LOCK -24: lwarx r0,0,r3 - cmpwi r0,0 - bne 24b - stwcx. r8,0,r3 - bne 24b - isync - ld r6,KVM_SDR1(r9) - mtspr SPRN_SDR1,r6 /* switch to partition page table */ - - /* Set up HID4 with the guest's LPID etc. */ - sync - mtspr SPRN_HID4,r7 - isync - - /* drop the guest's tlbie_lock */ - li r0,0 - stw r0,0(r3) - /* Check if HDEC expires soon */ - mfspr r3,SPRN_HDEC - cmpwi r3,10 - li r12,BOOK3S_INTERRUPT_HV_DECREMENTER - blt hdec_soon - - /* Enable HDEC interrupts */ - mfspr r0,SPRN_HID0 - li r3,1 - rldimi r0,r3, HID0_HDICE_SH, 64-HID0_HDICE_SH-1 - sync - mtspr SPRN_HID0,r0 - mfspr r0,SPRN_HID0 - mfspr r0,SPRN_HID0 - mfspr r0,SPRN_HID0 - mfspr r0,SPRN_HID0 - mfspr r0,SPRN_HID0 - mfspr r0,SPRN_HID0 -31: /* Do we have a guest vcpu to run? */ cmpdi r4, 0 beq kvmppc_primary_no_guest @@ -606,7 +521,6 @@ kvmppc_got_guest: stb r6, VCPU_VPA_DIRTY(r4) 25: -BEGIN_FTR_SECTION /* Save purr/spurr */ mfspr r5,SPRN_PURR mfspr r6,SPRN_SPURR @@ -616,7 +530,6 @@ BEGIN_FTR_SECTION ld r8,VCPU_SPURR(r4) mtspr SPRN_PURR,r7 mtspr SPRN_SPURR,r8 -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) BEGIN_FTR_SECTION /* Set partition DABR */ @@ -625,9 +538,7 @@ BEGIN_FTR_SECTION ld r6,VCPU_DABR(r4) mtspr SPRN_DABRX,r5 mtspr SPRN_DABR,r6 - BEGIN_FTR_SECTION_NESTED(89) isync - END_FTR_SECTION_NESTED(CPU_FTR_ARCH_206, CPU_FTR_ARCH_206, 89) END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) #ifdef CONFIG_PPC_TRANSACTIONAL_MEM @@ -758,20 +669,12 @@ END_FTR_SECTION_IFSET(CPU_FTR_PMAO_BUG) lwz r7, VCPU_PMC + 12(r4) lwz r8, VCPU_PMC + 16(r4) lwz r9, VCPU_PMC + 20(r4) -BEGIN_FTR_SECTION - lwz r10, VCPU_PMC + 24(r4) - lwz r11, VCPU_PMC + 28(r4) -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201) mtspr SPRN_PMC1, r3 mtspr SPRN_PMC2, r5 mtspr SPRN_PMC3, r6 mtspr SPRN_PMC4, r7 mtspr SPRN_PMC5, r8 mtspr SPRN_PMC6, r9 -BEGIN_FTR_SECTION - mtspr SPRN_PMC7, r10 - mtspr SPRN_PMC8, r11 -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201) ld r3, VCPU_MMCR(r4) ld r5, VCPU_MMCR + 8(r4) ld r6, VCPU_MMCR + 16(r4) @@ -818,14 +721,12 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) ld r30, VCPU_GPR(R30)(r4) ld r31, VCPU_GPR(R31)(r4) -BEGIN_FTR_SECTION /* Switch DSCR to guest value */ ld r5, VCPU_DSCR(r4) mtspr SPRN_DSCR, r5 -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) BEGIN_FTR_SECTION - /* Skip next section on POWER7 or PPC970 */ + /* Skip next section on POWER7 */ b 8f END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) /* Turn on TM so we can access TFHAR/TFIAR/TEXASR */ @@ -901,7 +802,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) mtspr SPRN_DAR, r5 mtspr SPRN_DSISR, r6 -BEGIN_FTR_SECTION /* Restore AMR and UAMOR, set AMOR to all 1s */ ld r5,VCPU_AMR(r4) ld r6,VCPU_UAMOR(r4) @@ -909,7 +809,6 @@ BEGIN_FTR_SECTION mtspr SPRN_AMR,r5 mtspr SPRN_UAMOR,r6 mtspr SPRN_AMOR,r7 -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) /* Restore state of CTRL run bit; assume 1 on entry */ lwz r5,VCPU_CTRL(r4) @@ -944,13 +843,11 @@ deliver_guest_interrupt: rldicl r0, r0, 64 - BOOK3S_IRQPRIO_EXTERNAL_LEVEL, 63 cmpdi cr1, r0, 0 andi. r8, r11, MSR_EE -BEGIN_FTR_SECTION mfspr r8, SPRN_LPCR /* Insert EXTERNAL_LEVEL bit into LPCR at the MER bit position */ rldimi r8, r0, LPCR_MER_SH, 63 - LPCR_MER_SH mtspr SPRN_LPCR, r8 isync -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) beq 5f li r0, BOOK3S_INTERRUPT_EXTERNAL bne cr1, 12f @@ -1105,15 +1002,13 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR) stw r12,VCPU_TRAP(r9) - /* Save HEIR (HV emulation assist reg) in last_inst + /* Save HEIR (HV emulation assist reg) in emul_inst if this is an HEI (HV emulation interrupt, e40) */ li r3,KVM_INST_FETCH_FAILED -BEGIN_FTR_SECTION cmpwi r12,BOOK3S_INTERRUPT_H_EMUL_ASSIST bne 11f mfspr r3,SPRN_HEIR -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) -11: stw r3,VCPU_LAST_INST(r9) +11: stw r3,VCPU_HEIR(r9) /* these are volatile across C function calls */ mfctr r3 @@ -1121,13 +1016,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) std r3, VCPU_CTR(r9) stw r4, VCPU_XER(r9) -BEGIN_FTR_SECTION /* If this is a page table miss then see if it's theirs or ours */ cmpwi r12, BOOK3S_INTERRUPT_H_DATA_STORAGE beq kvmppc_hdsi cmpwi r12, BOOK3S_INTERRUPT_H_INST_STORAGE beq kvmppc_hisi -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) /* See if this is a leftover HDEC interrupt */ cmpwi r12,BOOK3S_INTERRUPT_HV_DECREMENTER @@ -1140,11 +1033,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) cmpwi r12,BOOK3S_INTERRUPT_SYSCALL beq hcall_try_real_mode - /* Only handle external interrupts here on arch 206 and later */ -BEGIN_FTR_SECTION - b ext_interrupt_to_host -END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_206) - /* External interrupt ? */ cmpwi r12, BOOK3S_INTERRUPT_EXTERNAL bne+ ext_interrupt_to_host @@ -1174,11 +1062,9 @@ guest_exit_cont: /* r9 = vcpu, r12 = trap, r13 = paca */ mfdsisr r7 std r6, VCPU_DAR(r9) stw r7, VCPU_DSISR(r9) -BEGIN_FTR_SECTION /* don't overwrite fault_dar/fault_dsisr if HDSI */ cmpwi r12,BOOK3S_INTERRUPT_H_DATA_STORAGE beq 6f -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) std r6, VCPU_FAULT_DAR(r9) stw r7, VCPU_FAULT_DSISR(r9) @@ -1217,7 +1103,6 @@ mc_cont: /* * Save the guest PURR/SPURR */ -BEGIN_FTR_SECTION mfspr r5,SPRN_PURR mfspr r6,SPRN_SPURR ld r7,VCPU_PURR(r9) @@ -1237,7 +1122,6 @@ BEGIN_FTR_SECTION add r4,r4,r6 mtspr SPRN_PURR,r3 mtspr SPRN_SPURR,r4 -END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_201) /* Save DEC */ mfspr r5,SPRN_DEC @@ -1287,22 +1171,18 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) 8: /* Save and reset AMR and UAMOR before turning on the MMU */ -BEGIN_FTR_SECTION mfspr r5,SPRN_AMR mfspr r6,SPRN_UAMOR std r5,VCPU_AMR(r9) std r6,VCPU_UAMOR(r9) li r6,0 mtspr SPRN_AMR,r6 -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) /* Switch DSCR back to host value */ -BEGIN_FTR_SECTION mfspr r8, SPRN_DSCR ld r7, HSTATE_DSCR(r13) std r8, VCPU_DSCR(r9) mtspr SPRN_DSCR, r7 -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) /* Save non-volatile GPRs */ std r14, VCPU_GPR(R14)(r9) @@ -1484,11 +1364,9 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) mfspr r4, SPRN_MMCR0 /* save MMCR0 */ mtspr SPRN_MMCR0, r3 /* freeze all counters, disable ints */ mfspr r6, SPRN_MMCRA -BEGIN_FTR_SECTION - /* On P7, clear MMCRA in order to disable SDAR updates */ + /* Clear MMCRA in order to disable SDAR updates */ li r7, 0 mtspr SPRN_MMCRA, r7 -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) isync beq 21f /* if no VPA, save PMU stuff anyway */ lbz r7, LPPACA_PMCINUSE(r8) @@ -1513,10 +1391,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) mfspr r6, SPRN_PMC4 mfspr r7, SPRN_PMC5 mfspr r8, SPRN_PMC6 -BEGIN_FTR_SECTION - mfspr r10, SPRN_PMC7 - mfspr r11, SPRN_PMC8 -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201) stw r3, VCPU_PMC(r9) stw r4, VCPU_PMC + 4(r9) stw r5, VCPU_PMC + 8(r9) @@ -1524,10 +1398,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201) stw r7, VCPU_PMC + 16(r9) stw r8, VCPU_PMC + 20(r9) BEGIN_FTR_SECTION - stw r10, VCPU_PMC + 24(r9) - stw r11, VCPU_PMC + 28(r9) -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201) -BEGIN_FTR_SECTION mfspr r5, SPRN_SIER mfspr r6, SPRN_SPMC1 mfspr r7, SPRN_SPMC2 @@ -1547,11 +1417,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) ptesync hdec_soon: /* r12 = trap, r13 = paca */ -BEGIN_FTR_SECTION - b 32f -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201) /* - * POWER7 guest -> host partition switch code. + * POWER7/POWER8 guest -> host partition switch code. * We don't have to lock against tlbies but we do * have to coordinate the hardware threads. */ @@ -1679,87 +1546,9 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) 16: ld r8,KVM_HOST_LPCR(r4) mtspr SPRN_LPCR,r8 isync - b 33f - - /* - * PPC970 guest -> host partition switch code. - * We have to lock against concurrent tlbies, and - * we have to flush the whole TLB. - */ -32: ld r5,HSTATE_KVM_VCORE(r13) - ld r4,VCORE_KVM(r5) /* pointer to struct kvm */ - - /* Take the guest's tlbie_lock */ -#ifdef __BIG_ENDIAN__ - lwz r8,PACA_LOCK_TOKEN(r13) -#else - lwz r8,PACAPACAINDEX(r13) -#endif - addi r3,r4,KVM_TLBIE_LOCK -24: lwarx r0,0,r3 - cmpwi r0,0 - bne 24b - stwcx. r8,0,r3 - bne 24b - isync - - ld r7,KVM_HOST_LPCR(r4) /* use kvm->arch.host_lpcr for HID4 */ - li r0,0x18f - rotldi r0,r0,HID4_LPID5_SH /* all lpid bits in HID4 = 1 */ - or r0,r7,r0 - ptesync - sync - mtspr SPRN_HID4,r0 /* switch to reserved LPID */ - isync - li r0,0 - stw r0,0(r3) /* drop guest tlbie_lock */ - - /* invalidate the whole TLB */ - li r0,256 - mtctr r0 - li r6,0 -25: tlbiel r6 - addi r6,r6,0x1000 - bdnz 25b - ptesync - - /* take native_tlbie_lock */ - ld r3,toc_tlbie_lock@toc(2) -24: lwarx r0,0,r3 - cmpwi r0,0 - bne 24b - stwcx. r8,0,r3 - bne 24b - isync - - ld r6,KVM_HOST_SDR1(r4) - mtspr SPRN_SDR1,r6 /* switch to host page table */ - - /* Set up host HID4 value */ - sync - mtspr SPRN_HID4,r7 - isync - li r0,0 - stw r0,0(r3) /* drop native_tlbie_lock */ - - lis r8,0x7fff /* MAX_INT@h */ - mtspr SPRN_HDEC,r8 - - /* Disable HDEC interrupts */ - mfspr r0,SPRN_HID0 - li r3,0 - rldimi r0,r3, HID0_HDICE_SH, 64-HID0_HDICE_SH-1 - sync - mtspr SPRN_HID0,r0 - mfspr r0,SPRN_HID0 - mfspr r0,SPRN_HID0 - mfspr r0,SPRN_HID0 - mfspr r0,SPRN_HID0 - mfspr r0,SPRN_HID0 - mfspr r0,SPRN_HID0 /* load host SLB entries */ -33: ld r8,PACA_SLBSHADOWPTR(r13) + ld r8,PACA_SLBSHADOWPTR(r13) .rept SLB_NUM_BOLTED li r3, SLBSHADOW_SAVEAREA @@ -2028,7 +1817,7 @@ hcall_real_table: .long 0 /* 0xd8 */ .long 0 /* 0xdc */ .long DOTSYM(kvmppc_h_cede) - hcall_real_table - .long 0 /* 0xe4 */ + .long DOTSYM(kvmppc_rm_h_confer) - hcall_real_table .long 0 /* 0xe8 */ .long 0 /* 0xec */ .long 0 /* 0xf0 */ @@ -2107,9 +1896,6 @@ _GLOBAL(kvmppc_h_cede) stw r0,VCPU_TRAP(r3) li r0,H_SUCCESS std r0,VCPU_GPR(R3)(r3) -BEGIN_FTR_SECTION - b kvm_cede_exit /* just send it up to host on 970 */ -END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_206) /* * Set our bit in the bitmask of napping threads unless all the @@ -2172,6 +1958,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_206) * occurs, with PECE1, PECE0 and PECEDP set in LPCR. Also clear the * runlatch bit before napping. */ +kvm_do_nap: mfspr r2, SPRN_CTRLF clrrdi r2, r2, 1 mtspr SPRN_CTRLT, r2 @@ -2435,7 +2222,6 @@ BEGIN_FTR_SECTION END_FTR_SECTION_IFSET(CPU_FTR_VSX) #endif mtmsrd r8 - isync addi r3,r3,VCPU_FPRS bl store_fp_state #ifdef CONFIG_ALTIVEC @@ -2471,7 +2257,6 @@ BEGIN_FTR_SECTION END_FTR_SECTION_IFSET(CPU_FTR_VSX) #endif mtmsrd r8 - isync addi r3,r4,VCPU_FPRS bl load_fp_state #ifdef CONFIG_ALTIVEC |