From patchwork Mon Jun 24 09:08:27 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bharat Bhushan X-Patchwork-Id: 253743 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 1F5072C0451 for ; Mon, 24 Jun 2013 19:00:50 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751096Ab3FXJAr (ORCPT ); Mon, 24 Jun 2013 05:00:47 -0400 Received: from va3ehsobe004.messaging.microsoft.com ([216.32.180.14]:51124 "EHLO va3outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750883Ab3FXJAq (ORCPT ); Mon, 24 Jun 2013 05:00:46 -0400 Received: from mail205-va3-R.bigfish.com (10.7.14.225) by VA3EHSOBE002.bigfish.com (10.7.40.22) with Microsoft SMTP Server id 14.1.225.23; Mon, 24 Jun 2013 09:00:45 +0000 Received: from mail205-va3 (localhost [127.0.0.1]) by mail205-va3-R.bigfish.com (Postfix) with ESMTP id 7C4BF360262; Mon, 24 Jun 2013 09:00:45 +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(zzzz1f42h1ee6h1de0h1fdah1202h1e76h1d1ah1d2ah1fc6h1082kzz8275bhz2dh2a8h668h839he5bhf0ah107ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1d0ch1d2eh1d3fh1dfeh1dffh1e1dh1e23h1155h) Received: from mail205-va3 (localhost.localdomain [127.0.0.1]) by mail205-va3 (MessageSwitch) id 1372064442446043_23977; Mon, 24 Jun 2013 09:00:42 +0000 (UTC) Received: from VA3EHSMHS032.bigfish.com (unknown [10.7.14.226]) by mail205-va3.bigfish.com (Postfix) with ESMTP id 6AAB1DC0897; Mon, 24 Jun 2013 09:00:42 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by VA3EHSMHS032.bigfish.com (10.7.99.42) with Microsoft SMTP Server (TLS) id 14.1.225.23; Mon, 24 Jun 2013 09:00:42 +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 14.2.328.11; Mon, 24 Jun 2013 09:00:41 +0000 Received: from freescale.com ([10.232.15.72]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with SMTP id r5O90acT004428; Mon, 24 Jun 2013 02:00:37 -0700 Received: by freescale.com (sSMTP sendmail emulation); Mon, 24 Jun 2013 14:38:55 +0530 From: Bharat Bhushan To: , , , , CC: Bharat Bhushan , Bharat Bhushan Subject: [PATCH 4/6 v5] KVM: PPC: exit to user space on "ehpriv" instruction Date: Mon, 24 Jun 2013 14:38:27 +0530 Message-ID: <1372064909-25098-5-git-send-email-Bharat.Bhushan@freescale.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1372064909-25098-1-git-send-email-Bharat.Bhushan@freescale.com> References: <1372064909-25098-1-git-send-email-Bharat.Bhushan@freescale.com> MIME-Version: 1.0 X-OriginatorOrg: freescale.com Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org "ehpriv" instruction is used for setting software breakpoints by user space. This patch adds support to exit to user space with "run->debug" have relevant information. As this is the first point we are using run->debug, also defined the run->debug structure. Signed-off-by: Bharat Bhushan --- arch/powerpc/include/asm/disassemble.h | 4 ++++ arch/powerpc/include/uapi/asm/kvm.h | 21 +++++++++++++++++---- arch/powerpc/kvm/e500_emulate.c | 27 +++++++++++++++++++++++++++ 3 files changed, 48 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/include/asm/disassemble.h b/arch/powerpc/include/asm/disassemble.h index 9b198d1..856f8de 100644 --- a/arch/powerpc/include/asm/disassemble.h +++ b/arch/powerpc/include/asm/disassemble.h @@ -77,4 +77,8 @@ static inline unsigned int get_d(u32 inst) return inst & 0xffff; } +static inline unsigned int get_oc(u32 inst) +{ + return (inst >> 11) & 0x7fff; +} #endif /* __ASM_PPC_DISASSEMBLE_H__ */ diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index 0fb1a6e..ded0607 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -269,7 +269,24 @@ struct kvm_fpu { __u64 fpr[32]; }; +/* + * Defines for h/w breakpoint, watchpoint (read, write or both) and + * software breakpoint. + * These are used as "type" in KVM_SET_GUEST_DEBUG ioctl and "status" + * for KVM_DEBUG_EXIT. + */ +#define KVMPPC_DEBUG_NONE 0x0 +#define KVMPPC_DEBUG_BREAKPOINT (1UL << 1) +#define KVMPPC_DEBUG_WATCH_WRITE (1UL << 2) +#define KVMPPC_DEBUG_WATCH_READ (1UL << 3) struct kvm_debug_exit_arch { + __u64 address; + /* + * exiting to userspace because of h/w breakpoint, watchpoint + * (read, write or both) and software breakpoint. + */ + __u32 status; + __u32 reserved; }; /* for KVM_SET_GUEST_DEBUG */ @@ -281,10 +298,6 @@ struct kvm_guest_debug_arch { * Type denotes h/w breakpoint, read watchpoint, write * watchpoint or watchpoint (both read and write). */ -#define KVMPPC_DEBUG_NONE 0x0 -#define KVMPPC_DEBUG_BREAKPOINT (1UL << 1) -#define KVMPPC_DEBUG_WATCH_WRITE (1UL << 2) -#define KVMPPC_DEBUG_WATCH_READ (1UL << 3) __u32 type; __u32 reserved; } bp[16]; diff --git a/arch/powerpc/kvm/e500_emulate.c b/arch/powerpc/kvm/e500_emulate.c index b10a012..dab9d07 100644 --- a/arch/powerpc/kvm/e500_emulate.c +++ b/arch/powerpc/kvm/e500_emulate.c @@ -26,6 +26,8 @@ #define XOP_TLBRE 946 #define XOP_TLBWE 978 #define XOP_TLBILX 18 +#define XOP_EHPRIV 270 +#define EHPRIV_OC_DEBUG 0 #ifdef CONFIG_KVM_E500MC static int dbell2prio(ulong param) @@ -82,6 +84,26 @@ static int kvmppc_e500_emul_msgsnd(struct kvm_vcpu *vcpu, int rb) } #endif +static int kvmppc_e500_emul_ehpriv(struct kvm_run *run, struct kvm_vcpu *vcpu, + unsigned int inst, int *advance) +{ + int emulated = EMULATE_DONE; + + switch (get_oc(inst)) { + case EHPRIV_OC_DEBUG: + run->exit_reason = KVM_EXIT_DEBUG; + run->debug.arch.address = vcpu->arch.pc; + run->debug.arch.status = 0; + kvmppc_account_exit(vcpu, DEBUG_EXITS); + emulated = EMULATE_EXIT_USER; + *advance = 0; + break; + default: + emulated = EMULATE_FAIL; + } + return emulated; +} + int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, unsigned int inst, int *advance) { @@ -130,6 +152,11 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, emulated = kvmppc_e500_emul_tlbivax(vcpu, ea); break; + case XOP_EHPRIV: + emulated = kvmppc_e500_emul_ehpriv(run, vcpu, inst, + advance); + break; + default: emulated = EMULATE_FAIL; }