From patchwork Fri Aug 3 07:08:43 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bharat Bhushan X-Patchwork-Id: 1268921 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 9A6953FD56 for ; Fri, 3 Aug 2012 07:08:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753200Ab2HCHIj (ORCPT ); Fri, 3 Aug 2012 03:08:39 -0400 Received: from tx2ehsobe001.messaging.microsoft.com ([65.55.88.11]:2174 "EHLO tx2outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752936Ab2HCHId (ORCPT ); Fri, 3 Aug 2012 03:08:33 -0400 Received: from mail147-tx2-R.bigfish.com (10.9.14.239) by TX2EHSOBE008.bigfish.com (10.9.40.28) with Microsoft SMTP Server id 14.1.225.23; Fri, 3 Aug 2012 07:08:32 +0000 Received: from mail147-tx2 (localhost [127.0.0.1]) by mail147-tx2-R.bigfish.com (Postfix) with ESMTP id B527A2E033A; Fri, 3 Aug 2012 07:08:32 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 3 X-BigFish: VS3(zzzz1202h1082kzz8275bhz2dh2a8h668h839he5bhf0ah) Received: from mail147-tx2 (localhost.localdomain [127.0.0.1]) by mail147-tx2 (MessageSwitch) id 1343977709900639_3770; Fri, 3 Aug 2012 07:08:29 +0000 (UTC) Received: from TX2EHSMHS015.bigfish.com (unknown [10.9.14.249]) by mail147-tx2.bigfish.com (Postfix) with ESMTP id CD643260046; Fri, 3 Aug 2012 07:08:29 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by TX2EHSMHS015.bigfish.com (10.9.99.115) with Microsoft SMTP Server (TLS) id 14.1.225.23; Fri, 3 Aug 2012 07:08:29 +0000 Received: from tx30smr01.am.freescale.net (10.81.153.31) by 039-SN1MMR1-001.039d.mgd.msft.net (10.84.1.13) with Microsoft SMTP Server (TLS) id 14.2.298.5; Fri, 3 Aug 2012 02:08:29 -0500 Received: from freescale.com ([10.232.15.72]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with SMTP id q7378Pak000535; Fri, 3 Aug 2012 00:08:26 -0700 Received: by freescale.com (sSMTP sendmail emulation); Fri, 03 Aug 2012 12:38:53 +0530 From: Bharat Bhushan To: , , CC: Bharat Bhushan Subject: [PATCH 3/3] KVM: PPC: booke: Added debug handler Date: Fri, 3 Aug 2012 12:38:43 +0530 Message-ID: <1343977723-25341-3-git-send-email-Bharat.Bhushan@freescale.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1343977723-25341-1-git-send-email-Bharat.Bhushan@freescale.com> References: <1343977723-25341-1-git-send-email-Bharat.Bhushan@freescale.com> MIME-Version: 1.0 X-OriginatorOrg: freescale.com Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Installed debug handler will be used for guest debug support and debug facility emulation features (patches for these features will follow this patch). Signed-off-by: Liu Yu [bharat.bhushan@freescale.com: Substantial changes] Signed-off-by: Bharat Bhushan Signed-off-by: Bharat Bhushan --- arch/powerpc/include/asm/kvm_host.h | 1 + arch/powerpc/kernel/asm-offsets.c | 1 + arch/powerpc/kvm/booke_interrupts.S | 45 +++++++++++++++++++++++++++++++++++ 3 files changed, 47 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index dcee499..bd78523 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -494,6 +494,7 @@ struct kvm_vcpu_arch { u32 tlbcfg[4]; u32 mmucfg; u32 epr; + u32 crit_save; #endif gpa_t paddr_accessed; gva_t vaddr_accessed; diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 85b05c4..92f149b 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -563,6 +563,7 @@ int main(void) DEFINE(VCPU_LAST_INST, offsetof(struct kvm_vcpu, arch.last_inst)); DEFINE(VCPU_FAULT_DEAR, offsetof(struct kvm_vcpu, arch.fault_dear)); DEFINE(VCPU_FAULT_ESR, offsetof(struct kvm_vcpu, arch.fault_esr)); + DEFINE(VCPU_CRIT_SAVE, offsetof(struct kvm_vcpu, arch.crit_save)); #endif /* CONFIG_PPC_BOOK3S */ #endif /* CONFIG_KVM */ diff --git a/arch/powerpc/kvm/booke_interrupts.S b/arch/powerpc/kvm/booke_interrupts.S index 3539805..890673c 100644 --- a/arch/powerpc/kvm/booke_interrupts.S +++ b/arch/powerpc/kvm/booke_interrupts.S @@ -73,6 +73,51 @@ _GLOBAL(kvmppc_handler_\ivor_nr) bctr .endm +.macro KVM_DBG_HANDLER ivor_nr scratch srr0 +_GLOBAL(kvmppc_handler_\ivor_nr) + mtspr \scratch, r4 + mfspr r4, SPRN_SPRG_THREAD + lwz r4, THREAD_KVM_VCPU(r4) + stw r3, VCPU_CRIT_SAVE(r4) + mfcr r3 + mfspr r4, SPRN_CSRR1 + andi. r4, r4, MSR_PR + bne 1f + /* debug interrupt happened in enter/exit path */ + mfspr r4, SPRN_CSRR1 + rlwinm r4, r4, 0, ~MSR_DE + mtspr SPRN_CSRR1, r4 + lis r4, 0xffff + ori r4, r4, 0xffff + mtspr SPRN_DBSR, r4 + mfspr r4, SPRN_SPRG_THREAD + lwz r4, THREAD_KVM_VCPU(r4) + mtcr r3 + lwz r3, VCPU_CRIT_SAVE(r4) + mfspr r4, \scratch + rfci +1: /* debug interrupt happened in guest */ + mfspr r4, \scratch + mtcr r3 + mr r3, r4 + mfspr r4, SPRN_SPRG_THREAD + lwz r4, THREAD_KVM_VCPU(r4) + stw r3, VCPU_GPR(R4)(r4) + stw r5, VCPU_GPR(R5)(r4) + stw r6, VCPU_GPR(R6)(r4) + lwz r3, VCPU_CRIT_SAVE(r4) + mfspr r5, \srr0 + stw r3, VCPU_GPR(R3)(r4) + stw r5, VCPU_PC(r4) + mfctr r5 + lis r6, kvmppc_resume_host@h + stw r5, VCPU_CTR(r4) + li r5, \ivor_nr + ori r6, r6, kvmppc_resume_host@l + mtctr r6 + bctr +.endm + .macro KVM_HANDLER_ADDR ivor_nr .long kvmppc_handler_\ivor_nr .endm