From patchwork Tue Aug 5 10:39:32 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mihai Caraman X-Patchwork-Id: 376650 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 6626D140116 for ; Tue, 5 Aug 2014 20:40:04 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753410AbaHEKkD (ORCPT ); Tue, 5 Aug 2014 06:40:03 -0400 Received: from mail-by2lp0240.outbound.protection.outlook.com ([207.46.163.240]:47698 "EHLO na01-by2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753378AbaHEKkC (ORCPT ); Tue, 5 Aug 2014 06:40:02 -0400 Received: from BY2PR03CA045.namprd03.prod.outlook.com (10.141.249.18) by BY2PR03MB508.namprd03.prod.outlook.com (10.141.143.27) with Microsoft SMTP Server (TLS) id 15.0.995.14; Tue, 5 Aug 2014 10:39:59 +0000 Received: from BN1AFFO11FD047.protection.gbl (2a01:111:f400:7c10::181) by BY2PR03CA045.outlook.office365.com (2a01:111:e400:2c5d::18) with Microsoft SMTP Server (TLS) id 15.0.995.14 via Frontend Transport; Tue, 5 Aug 2014 10:39:46 +0000 Received: from tx30smr01.am.freescale.net (192.88.168.50) by BN1AFFO11FD047.mail.protection.outlook.com (10.58.53.62) with Microsoft SMTP Server (TLS) id 15.0.990.10 via Frontend Transport; Tue, 5 Aug 2014 10:39:46 +0000 Received: from fsr-fed1764-012.ea.freescale.net (fsr-fed1764-012-010171073213.ea.freescale.net [10.171.73.213]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id s75Adfah018566; Tue, 5 Aug 2014 03:39:44 -0700 From: Mihai Caraman To: CC: , Mihai Caraman Subject: [PATCH v3 2/5] KVM: PPC: Book3e: Add AltiVec support Date: Tue, 5 Aug 2014 13:39:32 +0300 Message-ID: <1407235175-30994-3-git-send-email-mihai.caraman@freescale.com> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1407235175-30994-1-git-send-email-mihai.caraman@freescale.com> References: <1407235175-30994-1-git-send-email-mihai.caraman@freescale.com> X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:192.88.168.50; CTRY:US; IPV:CAL; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(6009001)(199002)(189002)(2351001)(104166001)(85306004)(107046002)(229853001)(77982001)(62966002)(80022001)(20776003)(47776003)(31966008)(48376002)(81542001)(81342001)(106466001)(79102001)(50466002)(105606002)(74662001)(86362001)(93916002)(95666004)(74502001)(64706001)(77156001)(97736001)(21056001)(104016003)(89996001)(19580395003)(19580405001)(83322001)(84676001)(87936001)(50226001)(46102001)(102836001)(4396001)(76482001)(44976005)(85852003)(50986999)(6806004)(68736004)(99396002)(83072002)(76176999)(88136002)(26826002)(110136001)(87286001)(33646002)(92566001)(36756003)(92726001)(211663006)(32563001); DIR:OUT; SFP:; SCL:1; SRVR:BY2PR03MB508; H:tx30smr01.am.freescale.net; FPR:; MLV:ovrnspm; PTR:InfoDomainNonexistent; MX:1; LANG:en; MIME-Version: 1.0 X-Microsoft-Antispam: BCL:0;PCL:0;RULEID: X-Forefront-PRVS: 02945962BD Received-SPF: Fail (protection.outlook.com: domain of freescale.com does not designate 192.88.168.50 as permitted sender) receiver=protection.outlook.com; client-ip=192.88.168.50; helo=tx30smr01.am.freescale.net; Authentication-Results: spf=fail (sender IP is 192.88.168.50) smtp.mailfrom=mihai.caraman@freescale.com; X-OriginatorOrg: freescale.com Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org Add KVM Book3e AltiVec support. KVM Book3e FPU support gracefully reuse host infrastructure so follow the same approach for AltiVec. Keep SPE/AltiVec exception handlers distinct using CONFIG_KVM_E500V2. Signed-off-by: Mihai Caraman --- v3: - use distinct SPE/AltiVec exception handlers v2: - integrate Paul's FP/VMX/VSX changes arch/powerpc/kvm/booke.c | 73 +++++++++++++++++++++++++++++++++++ arch/powerpc/kvm/booke.h | 5 +++ arch/powerpc/kvm/bookehv_interrupts.S | 10 +++-- arch/powerpc/kvm/e500_emulate.c | 18 +++++++++ 4 files changed, 102 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 0c6f616..c5cca09 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -168,6 +168,40 @@ static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu) #endif } +/* + * Simulate AltiVec unavailable fault to load guest state + * from thread to AltiVec unit. + * It requires to be called with preemption disabled. + */ +static inline void kvmppc_load_guest_altivec(struct kvm_vcpu *vcpu) +{ +#ifdef CONFIG_ALTIVEC + if (cpu_has_feature(CPU_FTR_ALTIVEC)) { + if (!(current->thread.regs->msr & MSR_VEC)) { + enable_kernel_altivec(); + load_vr_state(&vcpu->arch.vr); + current->thread.vr_save_area = &vcpu->arch.vr; + current->thread.regs->msr |= MSR_VEC; + } + } +#endif +} + +/* + * Save guest vcpu AltiVec state into thread. + * It requires to be called with preemption disabled. + */ +static inline void kvmppc_save_guest_altivec(struct kvm_vcpu *vcpu) +{ +#ifdef CONFIG_ALTIVEC + if (cpu_has_feature(CPU_FTR_ALTIVEC)) { + if (current->thread.regs->msr & MSR_VEC) + giveup_altivec(current); + current->thread.vr_save_area = NULL; + } +#endif +} + static void kvmppc_vcpu_sync_debug(struct kvm_vcpu *vcpu) { /* Synchronize guest's desire to get debug interrupts into shadow MSR */ @@ -375,9 +409,14 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, case BOOKE_IRQPRIO_ITLB_MISS: case BOOKE_IRQPRIO_SYSCALL: case BOOKE_IRQPRIO_FP_UNAVAIL: +#ifdef CONFIG_KVM_E500V2 case BOOKE_IRQPRIO_SPE_UNAVAIL: case BOOKE_IRQPRIO_SPE_FP_DATA: case BOOKE_IRQPRIO_SPE_FP_ROUND: +#else + case BOOKE_IRQPRIO_ALTIVEC_UNAVAIL: + case BOOKE_IRQPRIO_ALTIVEC_ASSIST: +#endif case BOOKE_IRQPRIO_AP_UNAVAIL: allowed = 1; msr_mask = MSR_CE | MSR_ME | MSR_DE; @@ -693,6 +732,17 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) kvmppc_load_guest_fp(vcpu); #endif +#ifdef CONFIG_ALTIVEC + /* Save userspace AltiVec state in stack */ + if (cpu_has_feature(CPU_FTR_ALTIVEC)) + enable_kernel_altivec(); + /* + * Since we can't trap on MSR_VEC in GS-mode, we consider the guest + * as always using the AltiVec. + */ + kvmppc_load_guest_altivec(vcpu); +#endif + /* Switch to guest debug context */ debug = vcpu->arch.shadow_dbg_reg; switch_booke_debug_regs(&debug); @@ -715,6 +765,10 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) kvmppc_save_guest_fp(vcpu); #endif +#ifdef CONFIG_ALTIVEC + kvmppc_save_guest_altivec(vcpu); +#endif + out: vcpu->mode = OUTSIDE_GUEST_MODE; return ret; @@ -999,6 +1053,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, r = RESUME_GUEST; break; +#ifdef CONFIG_KVM_E500V2 #ifdef CONFIG_SPE case BOOKE_INTERRUPT_SPE_UNAVAIL: { if (vcpu->arch.shared->msr & MSR_SPE) @@ -1040,7 +1095,24 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, run->hw.hardware_exit_reason = exit_nr; r = RESUME_HOST; break; +#endif /* !CONFIG_SPE */ +#else +/* + * On cores with Vector category, KVM is loaded only if CONFIG_ALTIVEC, + * see kvmppc_core_check_processor_compat(). + */ +#ifdef CONFIG_ALTIVEC + case BOOKE_INTERRUPT_ALTIVEC_UNAVAIL: + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL); + r = RESUME_GUEST; + break; + + case BOOKE_INTERRUPT_ALTIVEC_ASSIST: + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_ASSIST); + r = RESUME_GUEST; + break; #endif +#endif /* !CONFIG_KVM_E500V2 */ case BOOKE_INTERRUPT_DATA_STORAGE: kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear, @@ -1217,6 +1289,7 @@ out: /* interrupts now hard-disabled */ kvmppc_fix_ee_before_entry(); kvmppc_load_guest_fp(vcpu); + kvmppc_load_guest_altivec(vcpu); } } diff --git a/arch/powerpc/kvm/booke.h b/arch/powerpc/kvm/booke.h index e73d513..ce5b543 100644 --- a/arch/powerpc/kvm/booke.h +++ b/arch/powerpc/kvm/booke.h @@ -32,9 +32,14 @@ #define BOOKE_IRQPRIO_ALIGNMENT 2 #define BOOKE_IRQPRIO_PROGRAM 3 #define BOOKE_IRQPRIO_FP_UNAVAIL 4 +#ifdef CONFIG_KVM_E500V2 #define BOOKE_IRQPRIO_SPE_UNAVAIL 5 #define BOOKE_IRQPRIO_SPE_FP_DATA 6 #define BOOKE_IRQPRIO_SPE_FP_ROUND 7 +#else +#define BOOKE_IRQPRIO_ALTIVEC_UNAVAIL 5 +#define BOOKE_IRQPRIO_ALTIVEC_ASSIST 6 +#endif #define BOOKE_IRQPRIO_SYSCALL 8 #define BOOKE_IRQPRIO_AP_UNAVAIL 9 #define BOOKE_IRQPRIO_DTLB_MISS 10 diff --git a/arch/powerpc/kvm/bookehv_interrupts.S b/arch/powerpc/kvm/bookehv_interrupts.S index e9fa56a..1d7c4d6 100644 --- a/arch/powerpc/kvm/bookehv_interrupts.S +++ b/arch/powerpc/kvm/bookehv_interrupts.S @@ -256,11 +256,9 @@ kvm_handler BOOKE_INTERRUPT_DTLB_MISS, EX_PARAMS_TLB, \ SPRN_SRR0, SPRN_SRR1, (NEED_EMU | NEED_DEAR | NEED_ESR) kvm_handler BOOKE_INTERRUPT_ITLB_MISS, EX_PARAMS_TLB, \ SPRN_SRR0, SPRN_SRR1, 0 -kvm_handler BOOKE_INTERRUPT_SPE_UNAVAIL, EX_PARAMS(GEN), \ +kvm_handler BOOKE_INTERRUPT_ALTIVEC_UNAVAIL, EX_PARAMS(GEN), \ SPRN_SRR0, SPRN_SRR1, 0 -kvm_handler BOOKE_INTERRUPT_SPE_FP_DATA, EX_PARAMS(GEN), \ - SPRN_SRR0, SPRN_SRR1, 0 -kvm_handler BOOKE_INTERRUPT_SPE_FP_ROUND, EX_PARAMS(GEN), \ +kvm_handler BOOKE_INTERRUPT_ALTIVEC_ASSIST, EX_PARAMS(GEN), \ SPRN_SRR0, SPRN_SRR1, 0 kvm_handler BOOKE_INTERRUPT_PERFORMANCE_MONITOR, EX_PARAMS(GEN), \ SPRN_SRR0, SPRN_SRR1, 0 @@ -361,6 +359,10 @@ kvm_lvl_handler BOOKE_INTERRUPT_WATCHDOG, \ kvm_handler BOOKE_INTERRUPT_DTLB_MISS, \ SPRN_SRR0, SPRN_SRR1, (NEED_EMU | NEED_DEAR | NEED_ESR) kvm_handler BOOKE_INTERRUPT_ITLB_MISS, SPRN_SRR0, SPRN_SRR1, 0 +/* + * TODO: SPE handlers should be available only for e500v2 cores. + * HV does not target e500v2 so remove them after kernel cleanup. + */ kvm_handler BOOKE_INTERRUPT_SPE_UNAVAIL, SPRN_SRR0, SPRN_SRR1, 0 kvm_handler BOOKE_INTERRUPT_SPE_FP_DATA, SPRN_SRR0, SPRN_SRR1, 0 kvm_handler BOOKE_INTERRUPT_SPE_FP_ROUND, SPRN_SRR0, SPRN_SRR1, 0 diff --git a/arch/powerpc/kvm/e500_emulate.c b/arch/powerpc/kvm/e500_emulate.c index c99c40e..e6e0429 100644 --- a/arch/powerpc/kvm/e500_emulate.c +++ b/arch/powerpc/kvm/e500_emulate.c @@ -259,6 +259,7 @@ int kvmppc_core_emulate_mtspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong spr_va break; /* extra exceptions */ +#ifdef CONFIG_KVM_E500V2 case SPRN_IVOR32: vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] = spr_val; break; @@ -268,6 +269,14 @@ int kvmppc_core_emulate_mtspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong spr_va case SPRN_IVOR34: vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] = spr_val; break; +#else + case SPRN_IVOR32: + vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_UNAVAIL] = spr_val; + break; + case SPRN_IVOR33: + vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_ASSIST] = spr_val; + break; +#endif case SPRN_IVOR35: vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = spr_val; break; @@ -381,6 +390,7 @@ int kvmppc_core_emulate_mfspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong *spr_v break; /* extra exceptions */ +#ifdef CONFIG_KVM_E500V2 case SPRN_IVOR32: *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL]; break; @@ -390,6 +400,14 @@ int kvmppc_core_emulate_mfspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong *spr_v case SPRN_IVOR34: *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND]; break; +#else + case SPRN_IVOR32: + *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_UNAVAIL]; + break; + case SPRN_IVOR33: + *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_ASSIST]; + break; +#endif case SPRN_IVOR35: *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR]; break;