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Fri, 19 Jun 2020 01:38:05 +0200 (CEST) Received: from belindir.nask.net.pl ([127.0.0.1]) by localhost (belindir.nask.net.pl [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id YwEJBqIWbjmm; Fri, 19 Jun 2020 01:38:00 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by belindir.nask.net.pl (Postfix) with ESMTP id 4EC3121493; Fri, 19 Jun 2020 01:38:00 +0200 (CEST) Received: from belindir.nask.net.pl ([127.0.0.1]) by localhost (belindir.nask.net.pl [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id TK6es7ReU9sb; Fri, 19 Jun 2020 01:38:00 +0200 (CEST) Received: from belindir.nask.net.pl (belindir.nask.net.pl [172.16.10.10]) by belindir.nask.net.pl (Postfix) with ESMTP id 2675A21447; Fri, 19 Jun 2020 01:38:00 +0200 (CEST) X-Inumbo-ID: d5692046-b1bc-11ea-bca7-bc764e2007e4 X-Virus-Scanned: amavisd-new at bagnar.nask.net.pl X-Virus-Scanned: amavisd-new at belindir.nask.net.pl Date: Fri, 19 Jun 2020 01:38:00 +0200 (CEST) From: =?utf-8?Q?Micha=C5=82_Leszczy=C5=84ski?= To: Xen-devel Message-ID: <1060400786.9820894.1592523480084.JavaMail.zimbra@cert.pl> In-Reply-To: <122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl> References: <122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl> Subject: [PATCH v2 1/7] xen/mm: lift 32 item limit from mfn/gfn arrays MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [172.16.10.10] X-Mailer: Zimbra 8.6.0_GA_1194 (ZimbraWebClient - GC83 (Win)/8.6.0_GA_1194) Thread-Topic: xen/mm: lift 32 item limit from mfn/gfn arrays Thread-Index: hSzh8Vr462omVBiCuz/GiNtdRkOdyLI0cUXZ X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Stefano Stabellini , Julien Grall , Wei Liu , Andrew Cooper , Ian Jackson , George Dunlap , Jan Beulich , Tamas K Lengyel , "Kang, Luwei" Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Content-Type: text/plain; charset="utf-8" Replace on-stack array allocation with heap allocation in order to lift the limit of 32 items in mfn/gfn arrays when calling acquire_resource. Signed-off-by: Michal Leszczynski --- xen/common/memory.c | 39 +++++++++++++++++---------------------- 1 file changed, 17 insertions(+), 22 deletions(-) diff --git a/xen/common/memory.c b/xen/common/memory.c index 714077c1e5..e02606ebe5 100644 --- a/xen/common/memory.c +++ b/xen/common/memory.c @@ -1050,12 +1050,7 @@ static int acquire_resource( { struct domain *d, *currd =3D current->domain; xen_mem_acquire_resource_t xmar; - /* - * The mfn_list and gfn_list (below) arrays are ok on stack for the - * moment since they are small, but if they need to grow in future - * use-cases then per-CPU arrays or heap allocations may be required. - */ - xen_pfn_t mfn_list[32]; + xen_pfn_t *mfn_list; int rc; =20 if ( copy_from_guest(&xmar, arg, 1) ) @@ -1064,25 +1059,17 @@ static int acquire_resource( if ( xmar.pad !=3D 0 ) return -EINVAL; =20 - if ( guest_handle_is_null(xmar.frame_list) ) - { - if ( xmar.nr_frames ) - return -EINVAL; - - xmar.nr_frames =3D ARRAY_SIZE(mfn_list); - - if ( __copy_field_to_guest(arg, &xmar, nr_frames) ) - return -EFAULT; - - return 0; - } + mfn_list =3D xmalloc_array(xen_pfn_t, xmar.nr_frames); =20 - if ( xmar.nr_frames > ARRAY_SIZE(mfn_list) ) - return -E2BIG; + if ( ! mfn_list ) + return -EFAULT; =20 rc =3D rcu_lock_remote_domain_by_id(xmar.domid, &d); if ( rc ) + { + xfree(mfn_list); return rc; + } =20 rc =3D xsm_domain_resource_map(XSM_DM_PRIV, d); if ( rc ) @@ -1111,7 +1098,7 @@ static int acquire_resource( } else { - xen_pfn_t gfn_list[ARRAY_SIZE(mfn_list)]; + xen_pfn_t *gfn_list; unsigned int i; =20 /* @@ -1120,7 +1107,12 @@ static int acquire_resource( * resource pages unless the caller is the hardware domain. */ if ( !is_hardware_domain(currd) ) - return -EACCES; + { + rc =3D -EACCES; + goto out; + } + + gfn_list =3D xmalloc_array(xen_pfn_t, xmar.nr_frames); =20 if ( copy_from_guest(gfn_list, xmar.frame_list, xmar.nr_frames) ) rc =3D -EFAULT; @@ -1133,9 +1125,12 @@ static int acquire_resource( if ( rc && i ) rc =3D -EIO; } + + xfree(gfn_list); } =20 out: + xfree(mfn_list); rcu_unlock_domain(d); =20 return rc; --=20 2.20.1 From nobody Wed Apr 24 18:33:47 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org ARC-Seal: i=1; a=rsa-sha256; t=1592523639; cv=none; d=zohomail.com; s=zohoarc; b=S0nwahsowhtxz0gQHyv71dtu+Pvy9z31tO+WJsV0uWKkMfw9OQSw1958ajukaIdTV5e5cATppBli66Gr0bOdKKHjCuKGQiFah2D811D9WcO7vqPDkBgjci1fnXXyhzGBfsPcVbJxlZMX52esIp7z3zgix508q6WGUyiO1ZOO0LY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1592523639; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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Fri, 19 Jun 2020 01:39:35 +0200 (CEST) X-Inumbo-ID: 0e4fef48-b1bd-11ea-bb0d-12813bfff9fa X-Virus-Scanned: amavisd-new at bagnar.nask.net.pl X-Virus-Scanned: amavisd-new at belindir.nask.net.pl Date: Fri, 19 Jun 2020 01:39:35 +0200 (CEST) From: =?utf-8?Q?Micha=C5=82_Leszczy=C5=84ski?= To: Xen-devel Message-ID: <61296395.9820908.1592523575731.JavaMail.zimbra@cert.pl> In-Reply-To: <122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl> References: <122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl> Subject: [PATCH v2 2/7] x86/vmx: add Intel PT MSR definitions MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [172.16.10.10] X-Mailer: Zimbra 8.6.0_GA_1194 (ZimbraWebClient - GC83 (Win)/8.6.0_GA_1194) Thread-Topic: x86/vmx: add Intel PT MSR definitions Thread-Index: hSzh8Vr462omVBiCuz/GiNtdRkOdyPG5uWby X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: "Kang, Luwei" , Wei Liu , Andrew Cooper , Jan Beulich , Tamas K Lengyel , Roger Pau =?utf-8?Q?Monn=C3=A9?= Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Content-Type: text/plain; charset="utf-8" Define constants related to Intel Processor Trace features. Signed-off-by: Michal Leszczynski --- xen/include/asm-x86/msr-index.h | 37 +++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/xen/include/asm-x86/msr-index.h b/xen/include/asm-x86/msr-inde= x.h index b328a47ed8..812516f340 100644 --- a/xen/include/asm-x86/msr-index.h +++ b/xen/include/asm-x86/msr-index.h @@ -621,4 +621,41 @@ #define MSR_PKGC9_IRTL 0x00000634 #define MSR_PKGC10_IRTL 0x00000635 =20 +/* Intel PT MSRs */ +#define MSR_RTIT_OUTPUT_BASE 0x00000560 +#define MSR_RTIT_OUTPUT_MASK 0x00000561 +#define MSR_RTIT_CTL 0x00000570 +#define RTIT_CTL_TRACEEN (_AC(1, ULL) << 0) +#define RTIT_CTL_CYCEN (_AC(1, ULL) << 1) +#define RTIT_CTL_OS (_AC(1, ULL) << 2) +#define RTIT_CTL_USR (_AC(1, ULL) << 3) +#define RTIT_CTL_PWR_EVT_EN (_AC(1, ULL) << 4) +#define RTIT_CTL_FUP_ON_PTW (_AC(1, ULL) << 5) +#define RTIT_CTL_FABRIC_EN (_AC(1, ULL) << 6) +#define RTIT_CTL_CR3_FILTER (_AC(1, ULL) << 7) +#define RTIT_CTL_TOPA (_AC(1, ULL) << 8) +#define RTIT_CTL_MTC_EN (_AC(1, ULL) << 9) +#define RTIT_CTL_TSC_EN (_AC(1, ULL) << 10) +#define RTIT_CTL_DIS_RETC (_AC(1, ULL) << 11) +#define RTIT_CTL_PTW_EN (_AC(1, ULL) << 12) +#define RTIT_CTL_BRANCH_EN (_AC(1, ULL) << 13) +#define RTIT_CTL_MTC_FREQ_OFFSET 14 +#define RTIT_CTL_MTC_FREQ (0x0fULL << RTIT_CTL_MTC_FREQ_OFFSE= T) +#define RTIT_CTL_CYC_THRESH_OFFSET 19 +#define RTIT_CTL_CYC_THRESH (0x0fULL << RTIT_CTL_CYC_THRESH_OFF= SET) +#define RTIT_CTL_PSB_FREQ_OFFSET 24 +#define RTIT_CTL_PSB_FREQ (0x0fULL << RTIT_CTL_PSB_FREQ_OFFSE= T) +#define RTIT_CTL_ADDR_OFFSET(n) (32 + 4 * (n)) +#define RTIT_CTL_ADDR(n) (0x0fULL << RTIT_CTL_ADDR_OFFSET(n)) +#define MSR_RTIT_STATUS 0x00000571 +#define RTIT_STATUS_FILTER_EN (_AC(1, ULL) << 0) +#define RTIT_STATUS_CONTEXT_EN (_AC(1, ULL) << 1) +#define RTIT_STATUS_TRIGGER_EN (_AC(1, ULL) << 2) +#define RTIT_STATUS_ERROR (_AC(1, ULL) << 4) +#define RTIT_STATUS_STOPPED (_AC(1, ULL) << 5) +#define RTIT_STATUS_BYTECNT (0x1ffffULL << 32) +#define MSR_RTIT_CR3_MATCH 0x00000572 +#define MSR_RTIT_ADDR_A(n) (0x00000580 + (n) * 2) +#define MSR_RTIT_ADDR_B(n) (0x00000581 + (n) * 2) + #endif /* __ASM_MSR_INDEX_H */ --=20 2.20.1 From nobody Wed Apr 24 18:33:47 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; 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Fri, 19 Jun 2020 01:40:22 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by belindir.nask.net.pl (Postfix) with ESMTP id 0D583215FA; Fri, 19 Jun 2020 01:40:22 +0200 (CEST) Received: from belindir.nask.net.pl ([127.0.0.1]) by localhost (belindir.nask.net.pl [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id v4RaGm9zPPRR; Fri, 19 Jun 2020 01:40:21 +0200 (CEST) Received: from belindir.nask.net.pl (belindir.nask.net.pl [172.16.10.10]) by belindir.nask.net.pl (Postfix) with ESMTP id D64412059A; Fri, 19 Jun 2020 01:40:21 +0200 (CEST) X-Inumbo-ID: 29f8c6ca-b1bd-11ea-b7bb-bc764e2007e4 X-Virus-Scanned: amavisd-new at bagnar.nask.net.pl X-Virus-Scanned: amavisd-new at belindir.nask.net.pl Date: Fri, 19 Jun 2020 01:40:21 +0200 (CEST) From: =?utf-8?Q?Micha=C5=82_Leszczy=C5=84ski?= To: Xen-devel Message-ID: <626789888.9820937.1592523621821.JavaMail.zimbra@cert.pl> In-Reply-To: <122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl> References: <122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl> Subject: [PATCH v2 3/7] x86/vmx: add IPT cpu feature MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [172.16.10.10] X-Mailer: Zimbra 8.6.0_GA_1194 (ZimbraWebClient - GC83 (Win)/8.6.0_GA_1194) Thread-Topic: x86/vmx: add IPT cpu feature Thread-Index: hSzh8Vr462omVBiCuz/GiNtdRkOdyBGenYvm X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Kevin Tian , "Kang, Luwei" , Jun Nakajima , Wei Liu , Andrew Cooper , Jan Beulich , Tamas K Lengyel , Roger Pau =?utf-8?Q?Monn=C3=A9?= Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Content-Type: text/plain; charset="utf-8" Check if Intel Processor Trace feature is supported by current processor. Define hvm_ipt_supported function. Signed-off-by: Michal Leszczynski --- xen/arch/x86/hvm/vmx/vmcs.c | 4 ++++ xen/include/asm-x86/cpufeature.h | 1 + xen/include/asm-x86/hvm/hvm.h | 9 +++++++++ xen/include/asm-x86/hvm/vmx/vmcs.h | 1 + xen/include/public/arch-x86/cpufeatureset.h | 1 + 5 files changed, 16 insertions(+) diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c index ca94c2bedc..8466ccb912 100644 --- a/xen/arch/x86/hvm/vmx/vmcs.c +++ b/xen/arch/x86/hvm/vmx/vmcs.c @@ -315,6 +315,10 @@ static int vmx_init_vmcs_config(void) if ( opt_ept_pml ) opt |=3D SECONDARY_EXEC_ENABLE_PML; =20 + /* Check whether IPT is supported in VMX operation */ + hvm_funcs.pt_supported =3D cpu_has_ipt && + ( _vmx_misc_cap & VMX_MISC_PT_SUPPORTED ); + /* * "APIC Register Virtualization" and "Virtual Interrupt Delivery" * can be set only when "use TPR shadow" is set diff --git a/xen/include/asm-x86/cpufeature.h b/xen/include/asm-x86/cpufeat= ure.h index f790d5c1f8..8d7955dd87 100644 --- a/xen/include/asm-x86/cpufeature.h +++ b/xen/include/asm-x86/cpufeature.h @@ -104,6 +104,7 @@ #define cpu_has_clwb boot_cpu_has(X86_FEATURE_CLWB) #define cpu_has_avx512er boot_cpu_has(X86_FEATURE_AVX512ER) #define cpu_has_avx512cd boot_cpu_has(X86_FEATURE_AVX512CD) +#define cpu_has_ipt boot_cpu_has(X86_FEATURE_IPT) #define cpu_has_sha boot_cpu_has(X86_FEATURE_SHA) #define cpu_has_avx512bw boot_cpu_has(X86_FEATURE_AVX512BW) #define cpu_has_avx512vl boot_cpu_has(X86_FEATURE_AVX512VL) diff --git a/xen/include/asm-x86/hvm/hvm.h b/xen/include/asm-x86/hvm/hvm.h index 1eb377dd82..8c0d0ece67 100644 --- a/xen/include/asm-x86/hvm/hvm.h +++ b/xen/include/asm-x86/hvm/hvm.h @@ -96,6 +96,9 @@ struct hvm_function_table { /* Necessary hardware support for alternate p2m's? */ bool altp2m_supported; =20 + /* Hardware support for processor tracing? */ + bool pt_supported; + /* Hardware virtual interrupt delivery enable? */ bool virtual_intr_delivery_enabled; =20 @@ -630,6 +633,12 @@ static inline bool hvm_altp2m_supported(void) return hvm_funcs.altp2m_supported; } =20 +/* returns true if hardware supports Intel Processor Trace */ +static inline bool hvm_pt_supported(void) +{ + return hvm_funcs.pt_supported; +} + /* updates the current hardware p2m */ static inline void altp2m_vcpu_update_p2m(struct vcpu *v) { diff --git a/xen/include/asm-x86/hvm/vmx/vmcs.h b/xen/include/asm-x86/hvm/v= mx/vmcs.h index 906810592f..4c81093aba 100644 --- a/xen/include/asm-x86/hvm/vmx/vmcs.h +++ b/xen/include/asm-x86/hvm/vmx/vmcs.h @@ -285,6 +285,7 @@ extern u64 vmx_ept_vpid_cap; =20 #define VMX_MISC_CR3_TARGET 0x01ff0000 #define VMX_MISC_VMWRITE_ALL 0x20000000 +#define VMX_MISC_PT_SUPPORTED 0x00004000 =20 #define VMX_TSC_MULTIPLIER_MAX 0xffffffffffffffffULL =20 diff --git a/xen/include/public/arch-x86/cpufeatureset.h b/xen/include/publ= ic/arch-x86/cpufeatureset.h index 5ca35d9d97..0d3f15f628 100644 --- a/xen/include/public/arch-x86/cpufeatureset.h +++ b/xen/include/public/arch-x86/cpufeatureset.h @@ -217,6 +217,7 @@ XEN_CPUFEATURE(SMAP, 5*32+20) /*S Supervisor = Mode Access Prevention */ XEN_CPUFEATURE(AVX512_IFMA, 5*32+21) /*A AVX-512 Integer Fused Multiply= Add */ XEN_CPUFEATURE(CLFLUSHOPT, 5*32+23) /*A CLFLUSHOPT instruction */ XEN_CPUFEATURE(CLWB, 5*32+24) /*A CLWB instruction */ +XEN_CPUFEATURE(IPT, 5*32+25) /* Intel Processor Trace */ XEN_CPUFEATURE(AVX512PF, 5*32+26) /*A AVX-512 Prefetch Instructions = */ XEN_CPUFEATURE(AVX512ER, 5*32+27) /*A AVX-512 Exponent & Reciprocal = Instrs */ XEN_CPUFEATURE(AVX512CD, 5*32+28) /*A AVX-512 Conflict Detection Ins= trs */ --=20 2.20.1 From nobody Wed Apr 24 18:33:47 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; 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Fri, 19 Jun 2020 01:41:03 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by belindir.nask.net.pl (Postfix) with ESMTP id 61350216B0; Fri, 19 Jun 2020 01:41:03 +0200 (CEST) Received: from belindir.nask.net.pl ([127.0.0.1]) by localhost (belindir.nask.net.pl [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 39RlJeFx7jAG; Fri, 19 Jun 2020 01:41:03 +0200 (CEST) Received: from belindir.nask.net.pl (belindir.nask.net.pl [172.16.10.10]) by belindir.nask.net.pl (Postfix) with ESMTP id 3B25B2165A; Fri, 19 Jun 2020 01:41:03 +0200 (CEST) X-Inumbo-ID: 431e8cac-b1bd-11ea-bb0d-12813bfff9fa X-Virus-Scanned: amavisd-new at bagnar.nask.net.pl X-Virus-Scanned: amavisd-new at belindir.nask.net.pl Date: Fri, 19 Jun 2020 01:41:03 +0200 (CEST) From: =?utf-8?Q?Micha=C5=82_Leszczy=C5=84ski?= To: Xen-devel Message-ID: <1005194077.9820950.1592523663199.JavaMail.zimbra@cert.pl> In-Reply-To: <122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl> References: <122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl> Subject: [PATCH v2 4/7] x86/vmx: add do_vmtrace_op MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [172.16.10.10] X-Mailer: Zimbra 8.6.0_GA_1194 (ZimbraWebClient - GC83 (Win)/8.6.0_GA_1194) Thread-Topic: x86/vmx: add do_vmtrace_op Thread-Index: hSzh8Vr462omVBiCuz/GiNtdRkOdyEuhVFaU X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Kevin Tian , Stefano Stabellini , Julien Grall , Jun Nakajima , Wei Liu , Andrew Cooper , Ian Jackson , George Dunlap , Jan Beulich , Tamas K Lengyel , "Kang, Luwei" , Roger Pau =?utf-8?Q?Monn=C3=A9?= Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Content-Type: text/plain; charset="utf-8" Provide an interface for privileged domains to manage external IPT monitoring. Guest IPT state will be preserved across vmentry/vmexit using ipt_state structure. Signed-off-by: Michal Leszczynski --- xen/arch/x86/hvm/hvm.c | 167 +++++++++++++++++++++++++++++ xen/arch/x86/hvm/vmx/vmx.c | 24 +++++ xen/arch/x86/mm.c | 37 +++++++ xen/common/domain.c | 1 + xen/include/asm-x86/hvm/vmx/vmcs.h | 16 +++ xen/include/public/hvm/hvm_op.h | 23 ++++ xen/include/public/hvm/params.h | 5 +- xen/include/public/memory.h | 1 + xen/include/xen/sched.h | 3 + 9 files changed, 276 insertions(+), 1 deletion(-) diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c index 5bb47583b3..145ad053d2 100644 --- a/xen/arch/x86/hvm/hvm.c +++ b/xen/arch/x86/hvm/hvm.c @@ -1612,6 +1612,24 @@ int hvm_vcpu_initialise(struct vcpu *v) return rc; } =20 +void hvm_vmtrace_destroy(struct vcpu *v) +{ + unsigned int i; + struct page_info *pg; + struct ipt_state *ipt =3D v->arch.hvm.vmx.ipt_state; + mfn_t buf_mfn =3D ipt->output_base >> PAGE_SHIFT; + size_t buf_size =3D ipt->output_mask.size + 1; + + xfree(ipt); + v->arch.hvm.vmx.ipt_state =3D NULL; + + for ( i =3D 0; i < (buf_size >> PAGE_SHIFT); i++ ) + { + pg =3D mfn_to_page(_mfn(mfn_add(buf_mfn, i))); + free_domheap_page(pg); + } +} + void hvm_vcpu_destroy(struct vcpu *v) { viridian_vcpu_deinit(v); @@ -1631,6 +1649,8 @@ void hvm_vcpu_destroy(struct vcpu *v) vlapic_destroy(v); =20 hvm_vcpu_cacheattr_destroy(v); + + hvm_vmtrace_destroy(v); } =20 void hvm_vcpu_down(struct vcpu *v) @@ -4066,6 +4086,51 @@ static int hvmop_set_evtchn_upcall_vector( return 0; } =20 +static int hvm_set_vmtrace_pt_size(struct domain *d, uint64_t value) +{ + void *buf; + unsigned int buf_order; + struct page_info *pg; + struct ipt_state *ipt; + struct vcpu *v; + + if ( value < PAGE_SIZE || + value > GB(4) || + ( value & (value - 1) ) ) { + /* we don't accept trace buffer size smaller than single page + * and the upper bound is defined as 4GB in the specification */ + return -EINVAL; + } + + for_each_vcpu ( d, v ) + { + buf_order =3D get_order_from_bytes(value); + pg =3D alloc_domheap_pages(d, buf_order, MEMF_no_refcount); + + if ( !pg ) + return -EFAULT; + + buf =3D page_to_virt(pg); + + if ( vmx_add_host_load_msr(v, MSR_RTIT_CTL, 0) ) + return -EFAULT; + + ipt =3D xmalloc(struct ipt_state); + + if ( !ipt ) + return -EFAULT; + + ipt->output_base =3D virt_to_mfn(buf) << PAGE_SHIFT; + ipt->output_mask.raw =3D value - 1; + ipt->status =3D 0; + ipt->active =3D 0; + + v->arch.hvm.vmx.ipt_state =3D ipt; + } + + return 0; +} + static int hvm_allow_set_param(struct domain *d, uint32_t index, uint64_t new_value) @@ -4127,6 +4192,7 @@ static int hvm_allow_set_param(struct domain *d, case HVM_PARAM_NR_IOREQ_SERVER_PAGES: case HVM_PARAM_ALTP2M: case HVM_PARAM_MCA_CAP: + case HVM_PARAM_VMTRACE_PT_SIZE: if ( value !=3D 0 && new_value !=3D value ) rc =3D -EEXIST; break; @@ -4328,6 +4394,9 @@ static int hvm_set_param(struct domain *d, uint32_t i= ndex, uint64_t value) case HVM_PARAM_MCA_CAP: rc =3D vmce_enable_mca_cap(d, value); break; + case HVM_PARAM_VMTRACE_PT_SIZE: + rc =3D hvm_set_vmtrace_pt_size(d, value); + break; } =20 if ( !rc ) @@ -4949,6 +5018,100 @@ static int compat_altp2m_op( return rc; } =20 +static int do_vmtrace_op(XEN_GUEST_HANDLE_PARAM(void) arg) +{ + struct xen_hvm_vmtrace_op a; + struct domain *d; + int rc; + struct vcpu *v; + struct ipt_state *ipt; + + if ( !hvm_pt_supported() ) + return -EOPNOTSUPP; + + if ( copy_from_guest(&a, arg, 1) ) + return -EFAULT; + + if ( a.version !=3D HVMOP_VMTRACE_INTERFACE_VERSION ) + return -EINVAL; + + d =3D rcu_lock_domain_by_any_id(a.domain); + spin_lock(&d->vmtrace_lock); + + if ( d =3D=3D NULL ) + return -ESRCH; + + if ( !is_hvm_domain(d) ) + { + rc =3D -EOPNOTSUPP; + goto out; + } + + domain_pause(d); + + if ( a.vcpu >=3D d->max_vcpus ) + { + rc =3D -EINVAL; + goto out; + } + + v =3D d->vcpu[a.vcpu]; + ipt =3D v->arch.hvm.vmx.ipt_state; + + if ( !ipt ) + { + /* + * PT must be first initialized upon domain creation. + */ + rc =3D -EINVAL; + goto out; + } + + switch ( a.cmd ) + { + case HVMOP_vmtrace_ipt_enable: + if ( vmx_add_guest_msr(v, MSR_RTIT_CTL, + RTIT_CTL_TRACEEN | RTIT_CTL_OS | + RTIT_CTL_USR | RTIT_CTL_BRANCH_EN) ) + { + rc =3D -EFAULT; + goto out; + } + + ipt->active =3D 1; + break; + case HVMOP_vmtrace_ipt_disable: + if ( vmx_add_guest_msr(v, MSR_RTIT_CTL, 0) ) + { + rc =3D -EFAULT; + goto out; + } + + ipt->active =3D 0; + break; + case HVMOP_vmtrace_ipt_get_offset: + a.offset =3D ipt->output_mask.offset; + break; + default: + rc =3D -EOPNOTSUPP; + goto out; + } + + rc =3D -EFAULT; + if ( __copy_to_guest(arg, &a, 1) ) + goto out; + rc =3D 0; + + out: + domain_unpause(d); + spin_unlock(&d->vmtrace_lock); + rcu_unlock_domain(d); + + return rc; +} + +DEFINE_XEN_GUEST_HANDLE(compat_hvm_vmtrace_op_t); + static int hvmop_get_mem_type( XEN_GUEST_HANDLE_PARAM(xen_hvm_get_mem_type_t) arg) { @@ -5101,6 +5264,10 @@ long do_hvm_op(unsigned long op, XEN_GUEST_HANDLE_PA= RAM(void) arg) rc =3D current->hcall_compat ? compat_altp2m_op(arg) : do_altp2m_o= p(arg); break; =20 + case HVMOP_vmtrace: + rc =3D do_vmtrace_op(arg); + break; + default: { gdprintk(XENLOG_DEBUG, "Bad HVM op %ld.\n", op); diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c index ab19d9424e..51f0046483 100644 --- a/xen/arch/x86/hvm/vmx/vmx.c +++ b/xen/arch/x86/hvm/vmx/vmx.c @@ -508,11 +508,25 @@ static void vmx_restore_host_msrs(void) =20 static void vmx_save_guest_msrs(struct vcpu *v) { + uint64_t rtit_ctl; + /* * We cannot cache SHADOW_GS_BASE while the VCPU runs, as it can * be updated at any time via SWAPGS, which we cannot trap. */ v->arch.hvm.vmx.shadow_gs =3D rdgsshadow(); + + if ( unlikely(v->arch.hvm.vmx.ipt_state && v->arch.hvm.vmx.ipt_state->= active) ) + { + smp_rmb(); + rdmsrl(MSR_RTIT_CTL, rtit_ctl); + + if ( rtit_ctl & RTIT_CTL_TRACEEN ) + BUG(); + + rdmsrl(MSR_RTIT_STATUS, v->arch.hvm.vmx.ipt_state->status); + rdmsrl(MSR_RTIT_OUTPUT_MASK, v->arch.hvm.vmx.ipt_state->output_mas= k.raw); + } } =20 static void vmx_restore_guest_msrs(struct vcpu *v) @@ -524,6 +538,16 @@ static void vmx_restore_guest_msrs(struct vcpu *v) =20 if ( cpu_has_msr_tsc_aux ) wrmsr_tsc_aux(v->arch.msrs->tsc_aux); + + if ( unlikely(v->arch.hvm.vmx.ipt_state && v->arch.hvm.vmx.ipt_state->= active) ) + { + wrmsrl(MSR_RTIT_OUTPUT_BASE, + v->arch.hvm.vmx.ipt_state->output_base); + wrmsrl(MSR_RTIT_OUTPUT_MASK, + v->arch.hvm.vmx.ipt_state->output_mask.raw); + wrmsrl(MSR_RTIT_STATUS, + v->arch.hvm.vmx.ipt_state->status); + } } =20 void vmx_update_cpu_exec_control(struct vcpu *v) diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c index e376fc7e8f..e4658dc27f 100644 --- a/xen/arch/x86/mm.c +++ b/xen/arch/x86/mm.c @@ -4624,6 +4624,43 @@ int arch_acquire_resource(struct domain *d, unsigned= int type, } break; } + + case XENMEM_resource_vmtrace_buf: + { + mfn_t mfn; + unsigned int i; + struct ipt_state *ipt; + + if ( id >=3D d->max_vcpus ) + { + rc =3D -EINVAL; + break; + } + + ipt =3D d->vcpu[id]->arch.hvm.vmx.ipt_state; + + if ( !ipt ) + { + rc =3D -EINVAL; + break; + } + + mfn =3D mfn_x(ipt->output_base >> PAGE_SHIFT); + + if (nr_frames > ( ( ipt->output_mask.size + 1 ) >> PAGE_SHIFT )) + { + rc =3D -EINVAL; + break; + } + + rc =3D 0; + for ( i =3D 0; i < nr_frames; i++ ) + { + mfn_list[i] =3D mfn_add(mfn, i); + } + + break; + } #endif =20 default: diff --git a/xen/common/domain.c b/xen/common/domain.c index 7cc9526139..6f6458cd5b 100644 --- a/xen/common/domain.c +++ b/xen/common/domain.c @@ -414,6 +414,7 @@ struct domain *domain_create(domid_t domid, d->shutdown_code =3D SHUTDOWN_CODE_INVALID; =20 spin_lock_init(&d->pbuf_lock); + spin_lock_init(&d->vmtrace_lock); =20 rwlock_init(&d->vnuma_rwlock); =20 diff --git a/xen/include/asm-x86/hvm/vmx/vmcs.h b/xen/include/asm-x86/hvm/v= mx/vmcs.h index 4c81093aba..9fc4653777 100644 --- a/xen/include/asm-x86/hvm/vmx/vmcs.h +++ b/xen/include/asm-x86/hvm/vmx/vmcs.h @@ -104,6 +104,19 @@ struct pi_blocking_vcpu { spinlock_t *lock; }; =20 +struct ipt_state { + uint64_t active; + uint64_t status; + uint64_t output_base; + union { + uint64_t raw; + struct { + uint32_t size; + uint32_t offset; + }; + } output_mask; +}; + struct vmx_vcpu { /* Physical address of VMCS. */ paddr_t vmcs_pa; @@ -186,6 +199,9 @@ struct vmx_vcpu { * pCPU and wakeup the related vCPU. */ struct pi_blocking_vcpu pi_blocking; + + /* State of Intel Processor Trace feature */ + struct ipt_state *ipt_state; }; =20 int vmx_create_vmcs(struct vcpu *v); diff --git a/xen/include/public/hvm/hvm_op.h b/xen/include/public/hvm/hvm_o= p.h index 870ec52060..8cd0b6ea49 100644 --- a/xen/include/public/hvm/hvm_op.h +++ b/xen/include/public/hvm/hvm_op.h @@ -382,6 +382,29 @@ struct xen_hvm_altp2m_op { typedef struct xen_hvm_altp2m_op xen_hvm_altp2m_op_t; DEFINE_XEN_GUEST_HANDLE(xen_hvm_altp2m_op_t); =20 +/* HVMOP_vmtrace: Perform VM tracing related operation */ +#define HVMOP_vmtrace 26 + +#define HVMOP_VMTRACE_INTERFACE_VERSION 0x00000001 + +struct xen_hvm_vmtrace_op { + /* IN variable */ + uint32_t version; /* HVMOP_VMTRACE_INTERFACE_VERSION */ + uint32_t cmd; +/* Enable/disable external vmtrace for given domain */ +#define HVMOP_vmtrace_ipt_enable 1 +#define HVMOP_vmtrace_ipt_disable 2 +#define HVMOP_vmtrace_ipt_get_offset 3 + domid_t domain; + uint32_t vcpu; + uint64_t size; + + /* OUT variable */ + uint64_t offset; +}; +typedef struct xen_hvm_vmtrace_op xen_hvm_vmtrace_op_t; +DEFINE_XEN_GUEST_HANDLE(xen_hvm_vmtrace_op_t); + #endif /* __XEN_PUBLIC_HVM_HVM_OP_H__ */ =20 /* diff --git a/xen/include/public/hvm/params.h b/xen/include/public/hvm/param= s.h index 0a91bfa749..adbc7e5d08 100644 --- a/xen/include/public/hvm/params.h +++ b/xen/include/public/hvm/params.h @@ -300,6 +300,9 @@ #define XEN_HVM_MCA_CAP_LMCE (xen_mk_ullong(1) << 0) #define XEN_HVM_MCA_CAP_MASK XEN_HVM_MCA_CAP_LMCE =20 -#define HVM_NR_PARAMS 39 +/* VM trace capabilities */ +#define HVM_PARAM_VMTRACE_PT_SIZE 39 + +#define HVM_NR_PARAMS 40 =20 #endif /* __XEN_PUBLIC_HVM_PARAMS_H__ */ diff --git a/xen/include/public/memory.h b/xen/include/public/memory.h index dbd35305df..f823c784c3 100644 --- a/xen/include/public/memory.h +++ b/xen/include/public/memory.h @@ -620,6 +620,7 @@ struct xen_mem_acquire_resource { =20 #define XENMEM_resource_ioreq_server 0 #define XENMEM_resource_grant_table 1 +#define XENMEM_resource_vmtrace_buf 2 =20 /* * IN - a type-specific resource identifier, which must be zero diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h index ac53519d7f..b3a36f3788 100644 --- a/xen/include/xen/sched.h +++ b/xen/include/xen/sched.h @@ -457,6 +457,9 @@ struct domain unsigned pbuf_idx; spinlock_t pbuf_lock; =20 + /* Used by vmtrace domctls */ + spinlock_t vmtrace_lock; + /* OProfile support. */ struct xenoprof *xenoprof; =20 --=20 2.20.1 From nobody Wed Apr 24 18:33:48 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org ARC-Seal: i=1; a=rsa-sha256; t=1592523759; cv=none; d=zohomail.com; s=zohoarc; b=LK0GZheJKlK38+zgGJ9KClQqpijnBLyDAf3UBR5giz2Fg1Iti84mH9Nc8bvjt/n5GuyXuVA3IcaDaKPEzu61ETtDEzSj1le9xEU+L0pJ3zUt+QIj3WbsxCIN9Qv4/EMRxO/Z2dm85U8fNpWrHBrTFJrKebkycoKjhWMzD11ML0k= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1592523759; 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Fri, 19 Jun 2020 01:41:37 +0200 (CEST) X-Inumbo-ID: 56ece1f2-b1bd-11ea-bb0d-12813bfff9fa X-Virus-Scanned: amavisd-new at bagnar.nask.net.pl X-Virus-Scanned: amavisd-new at belindir.nask.net.pl Date: Fri, 19 Jun 2020 01:41:37 +0200 (CEST) From: =?utf-8?Q?Micha=C5=82_Leszczy=C5=84ski?= To: Xen-devel Message-ID: <1593123263.9820951.1592523697296.JavaMail.zimbra@cert.pl> In-Reply-To: <122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl> References: <122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl> Subject: [PATCH v2 5/7] tools/libxc: add xc_vmtrace_* functions MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [172.16.10.10] X-Mailer: Zimbra 8.6.0_GA_1194 (ZimbraWebClient - GC83 (Win)/8.6.0_GA_1194) Thread-Topic: tools/libxc: add xc_vmtrace_* functions Thread-Index: hSzh8Vr462omVBiCuz/GiNtdRkOdyOzjXSg4 X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Tamas K Lengyel , Ian Jackson , "Kang, Luwei" , Wei Liu Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Content-Type: text/plain; charset="utf-8" Add functions in libxc that use the new HVMOP_vmtrace interface. Signed-off-by: Michal Leszczynski --- tools/libxc/Makefile | 1 + tools/libxc/include/xenctrl.h | 39 ++++++++++++++ tools/libxc/xc_vmtrace.c | 97 +++++++++++++++++++++++++++++++++++ 3 files changed, 137 insertions(+) create mode 100644 tools/libxc/xc_vmtrace.c diff --git a/tools/libxc/Makefile b/tools/libxc/Makefile index fae5969a73..605e44501d 100644 --- a/tools/libxc/Makefile +++ b/tools/libxc/Makefile @@ -27,6 +27,7 @@ CTRL_SRCS-y +=3D xc_csched2.c CTRL_SRCS-y +=3D xc_arinc653.c CTRL_SRCS-y +=3D xc_rt.c CTRL_SRCS-y +=3D xc_tbuf.c +CTRL_SRCS-y +=3D xc_vmtrace.c CTRL_SRCS-y +=3D xc_pm.c CTRL_SRCS-y +=3D xc_cpu_hotplug.c CTRL_SRCS-y +=3D xc_resume.c diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h index 113ddd935d..101cc9b712 100644 --- a/tools/libxc/include/xenctrl.h +++ b/tools/libxc/include/xenctrl.h @@ -1585,6 +1585,45 @@ int xc_tbuf_set_cpu_mask(xc_interface *xch, xc_cpuma= p_t mask); =20 int xc_tbuf_set_evt_mask(xc_interface *xch, uint32_t mask); =20 +/** + * Enable Intel Processor Trace for given vCPU in given DomU. + * Allocate the trace ringbuffer with given size. + * + * @parm xch a handle to an open hypervisor interface + * @parm domid domain identifier + * @parm vcpu vcpu identifier + * @return 0 on success, -1 on failure + */ +int xc_vmtrace_ipt_enable(xc_interface *xch, uint32_t domid, + uint32_t vcpu); + +/** + * Disable Intel Processor Trace for given vCPU in given DomU. + * Deallocate the trace ringbuffer. + * + * @parm xch a handle to an open hypervisor interface + * @parm domid domain identifier + * @parm vcpu vcpu identifier + * @return 0 on success, -1 on failure + */ +int xc_vmtrace_ipt_disable(xc_interface *xch, uint32_t domid, + uint32_t vcpu); + +/** + * Get current offset inside the trace ringbuffer. + * This allows to determine how much data was written into the buffer. + * Once buffer overflows, the offset will reset to 0 and the previous + * data will be overriden. + * + * @parm xch a handle to an open hypervisor interface + * @parm domid domain identifier + * @parm vcpu vcpu identifier + * @parm offset current offset inside trace buffer will be written there + * @return 0 on success, -1 on failure + */ +int xc_vmtrace_ipt_get_offset(xc_interface *xch, uint32_t domid, + uint32_t vcpu, uint64_t *offset); + int xc_domctl(xc_interface *xch, struct xen_domctl *domctl); int xc_sysctl(xc_interface *xch, struct xen_sysctl *sysctl); =20 diff --git a/tools/libxc/xc_vmtrace.c b/tools/libxc/xc_vmtrace.c new file mode 100644 index 0000000000..5f0551ad71 --- /dev/null +++ b/tools/libxc/xc_vmtrace.c @@ -0,0 +1,97 @@ +/*************************************************************************= ***** + * xc_vmtrace.c + * + * API for manipulating hardware tracing features + * + * Copyright (c) 2020, Michal Leszczynski + * + * Copyright 2020 CERT Polska. All rights reserved. + * Use is subject to license terms. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; + * version 2.1 of the License. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; If not, see . + */ + +#include "xc_private.h" +#include + +int xc_vmtrace_ipt_enable( + xc_interface *xch, uint32_t domid, uint32_t vcpu) +{ + DECLARE_HYPERCALL_BUFFER(xen_hvm_vmtrace_op_t, arg); + int rc =3D -1; + + arg =3D xc_hypercall_buffer_alloc(xch, arg, sizeof(*arg)); + if ( arg =3D=3D NULL ) + return -1; + + arg->version =3D HVMOP_VMTRACE_INTERFACE_VERSION; + arg->cmd =3D HVMOP_vmtrace_ipt_enable; + arg->domain =3D domid; + arg->vcpu =3D vcpu; + + rc =3D xencall2(xch->xcall, __HYPERVISOR_hvm_op, HVMOP_vmtrace, + HYPERCALL_BUFFER_AS_ARG(arg)); + + xc_hypercall_buffer_free(xch, arg); + return rc; +} + +int xc_vmtrace_ipt_get_offset( + xc_interface *xch, uint32_t domid, uint32_t vcpu, uint64_t *offset) +{ + DECLARE_HYPERCALL_BUFFER(xen_hvm_vmtrace_op_t, arg); + int rc =3D -1; + + arg =3D xc_hypercall_buffer_alloc(xch, arg, sizeof(*arg)); + if ( arg =3D=3D NULL ) + return -1; + + arg->version =3D HVMOP_VMTRACE_INTERFACE_VERSION; + arg->cmd =3D HVMOP_vmtrace_ipt_get_offset; + arg->domain =3D domid; + arg->vcpu =3D vcpu; + + rc =3D xencall2(xch->xcall, __HYPERVISOR_hvm_op, HVMOP_vmtrace, + HYPERCALL_BUFFER_AS_ARG(arg)); + + if ( rc =3D=3D 0 ) + { + *offset =3D arg->offset; + } + + xc_hypercall_buffer_free(xch, arg); + return rc; +} + +int xc_vmtrace_ipt_disable(xc_interface *xch, uint32_t domid, uint32_t vcp= u) +{ + DECLARE_HYPERCALL_BUFFER(xen_hvm_vmtrace_op_t, arg); + int rc =3D -1; + + arg =3D xc_hypercall_buffer_alloc(xch, arg, sizeof(*arg)); + if ( arg =3D=3D NULL ) + return -1; + + arg->version =3D HVMOP_VMTRACE_INTERFACE_VERSION; + arg->cmd =3D HVMOP_vmtrace_ipt_disable; + arg->domain =3D domid; + arg->vcpu =3D vcpu; + + rc =3D xencall2(xch->xcall, __HYPERVISOR_hvm_op, HVMOP_vmtrace, + HYPERCALL_BUFFER_AS_ARG(arg)); + + xc_hypercall_buffer_free(xch, arg); + return rc; +} + --=20 2.20.1 From nobody Wed Apr 24 18:33:48 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; 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Fri, 19 Jun 2020 01:42:08 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by belindir.nask.net.pl (Postfix) with ESMTP id 8A390215FA; Fri, 19 Jun 2020 01:42:08 +0200 (CEST) Received: from belindir.nask.net.pl ([127.0.0.1]) by localhost (belindir.nask.net.pl [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 1NMEayWZazcC; Fri, 19 Jun 2020 01:42:08 +0200 (CEST) Received: from belindir.nask.net.pl (belindir.nask.net.pl [172.16.10.10]) by belindir.nask.net.pl (Postfix) with ESMTP id 6C8F72059A; Fri, 19 Jun 2020 01:42:08 +0200 (CEST) X-Inumbo-ID: 694a04f6-b1bd-11ea-bb0d-12813bfff9fa X-Virus-Scanned: amavisd-new at bagnar.nask.net.pl X-Virus-Scanned: amavisd-new at belindir.nask.net.pl Date: Fri, 19 Jun 2020 01:42:08 +0200 (CEST) From: =?utf-8?Q?Micha=C5=82_Leszczy=C5=84ski?= To: Xen-devel Message-ID: <2064075230.9820955.1592523728387.JavaMail.zimbra@cert.pl> In-Reply-To: <122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl> References: <122238637.9820857.1592523264685.JavaMail.zimbra@cert.pl> Subject: [PATCH v2 6/7] tools/libxl: add vmtrace_pt_size parameter MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [172.16.10.10] X-Mailer: Zimbra 8.6.0_GA_1194 (ZimbraWebClient - GC83 (Win)/8.6.0_GA_1194) Thread-Topic: tools/libxl: add vmtrace_pt_size parameter Thread-Index: hSzh8Vr462omVBiCuz/GiNtdRkOdyI5Kl+C5 X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: "Kang, Luwei" , Wei Liu , Tamas K Lengyel , Ian Jackson , George Dunlap , Anthony PERARD Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Content-Type: text/plain; charset="utf-8" Allow to specify the size of per-vCPU trace buffer upon domain creation. This is zero by default (meaning: not enabled). Signed-off-by: Michal Leszczynski --- tools/golang/xenlight/helpers.gen.go | 2 ++ tools/golang/xenlight/types.gen.go | 1 + tools/libxl/libxl_types.idl | 2 ++ tools/libxl/libxl_x86.c | 5 +++++ tools/xl/xl_parse.c | 4 ++++ 5 files changed, 14 insertions(+) diff --git a/tools/golang/xenlight/helpers.gen.go b/tools/golang/xenlight/h= elpers.gen.go index 935d3bc50a..986ebbd681 100644 --- a/tools/golang/xenlight/helpers.gen.go +++ b/tools/golang/xenlight/helpers.gen.go @@ -1117,6 +1117,7 @@ return fmt.Errorf("invalid union key '%v'", x.Type)} x.ArchArm.GicVersion =3D GicVersion(xc.arch_arm.gic_version) x.ArchArm.Vuart =3D VuartType(xc.arch_arm.vuart) x.Altp2M =3D Altp2MMode(xc.altp2m) +x.VmtracePtSize =3D int(xc.vmtrace_pt_size) =20 return nil} =20 @@ -1592,6 +1593,7 @@ return fmt.Errorf("invalid union key '%v'", x.Type)} xc.arch_arm.gic_version =3D C.libxl_gic_version(x.ArchArm.GicVersion) xc.arch_arm.vuart =3D C.libxl_vuart_type(x.ArchArm.Vuart) xc.altp2m =3D C.libxl_altp2m_mode(x.Altp2M) +xc.vmtrace_pt_size =3D C.int(x.VmtracePtSize) =20 return nil } diff --git a/tools/golang/xenlight/types.gen.go b/tools/golang/xenlight/typ= es.gen.go index 663c1e86b4..41ec7cdd32 100644 --- a/tools/golang/xenlight/types.gen.go +++ b/tools/golang/xenlight/types.gen.go @@ -516,6 +516,7 @@ GicVersion GicVersion Vuart VuartType } Altp2M Altp2MMode +VmtracePtSize int } =20 type domainBuildInfoTypeUnion interface { diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl index 9d3f05f399..04c1704b72 100644 --- a/tools/libxl/libxl_types.idl +++ b/tools/libxl/libxl_types.idl @@ -645,6 +645,8 @@ libxl_domain_build_info =3D Struct("domain_build_info",[ # supported by x86 HVM and ARM support is planned. ("altp2m", libxl_altp2m_mode), =20 + ("vmtrace_pt_size", integer), + ], dir=3DDIR_IN, copy_deprecated_fn=3D"libxl__domain_build_info_copy_deprecated", ) diff --git a/tools/libxl/libxl_x86.c b/tools/libxl/libxl_x86.c index e57f63282e..14be2b395a 100644 --- a/tools/libxl/libxl_x86.c +++ b/tools/libxl/libxl_x86.c @@ -404,6 +404,11 @@ static int hvm_set_conf_params(libxl__gc *gc, uint32_t= domid, libxl_defbool_val(info->u.hvm.altp2m)) altp2m =3D libxl_defbool_val(info->u.hvm.altp2m); =20 + if (xc_hvm_param_set(xch, domid, HVM_PARAM_VMTRACE_PT_SIZE, + info->vmtrace_pt_size)) { + LOG(ERROR, "Couldn't set HVM_PARAM_VMTRACE_PT_SIZE"); + goto out; + } if (xc_hvm_param_set(xch, domid, HVM_PARAM_HPET_ENABLED, libxl_defbool_val(info->u.hvm.hpet))) { LOG(ERROR, "Couldn't set HVM_PARAM_HPET_ENABLED"); diff --git a/tools/xl/xl_parse.c b/tools/xl/xl_parse.c index 61b4ef7b7e..6ab98dda55 100644 --- a/tools/xl/xl_parse.c +++ b/tools/xl/xl_parse.c @@ -1861,6 +1861,10 @@ void parse_config_data(const char *config_source, } } =20 + if (!xlu_cfg_get_long(config, "vmtrace_pt_size", &l, 1)) { + b_info->vmtrace_pt_size =3D l; + } + if (!xlu_cfg_get_list(config, "ioports", &ioports, &num_ioports, 0)) { b_info->num_ioports =3D num_ioports; b_info->ioports =3D calloc(num_ioports, sizeof(*b_info->ioports)); --=20 2.20.1 From nobody Wed Apr 24 18:33:48 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org ARC-Seal: i=1; a=rsa-sha256; t=1592523832; cv=none; d=zohomail.com; s=zohoarc; b=JFP+b6NVww08ZlbGJcx/SWso4nVnejdsnVoG7d7C6LaAtnbpJPfipU6rVu1nOEJtbPBZcGFHHgh3OyhAawP/qj7ZReTPQ/hy5Xu0oiSnwIz1n4t4oyG1GDxSh3WVSIxTdQQ+cqyoxdMqKyv54WrCCoU4q+fuUTRfU2+bnBhS02E= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; 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charset="utf-8" Add an demonstration tool that uses xc_vmtrace_* calls in order to manage external IPT monitoring for DomU. Signed-off-by: Michal Leszczynski --- tools/proctrace/COPYING | 339 ++++++++++++++++++++++++++++++++++++ tools/proctrace/Makefile | 50 ++++++ tools/proctrace/proctrace.c | 153 ++++++++++++++++ 3 files changed, 542 insertions(+) create mode 100644 tools/proctrace/COPYING create mode 100644 tools/proctrace/Makefile create mode 100644 tools/proctrace/proctrace.c diff --git a/tools/proctrace/COPYING b/tools/proctrace/COPYING new file mode 100644 index 0000000000..c0a841112c --- /dev/null +++ b/tools/proctrace/COPYING @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 = USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Library General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. 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Each licensee is addressed as "you". + +Activities other than copying, distribution and modification are not +covered by this License; they are outside its scope. The act of +running the Program is not restricted, and the output from the Program +is covered only if its contents constitute a work based on the +Program (independent of having been made by running the Program). +Whether that is true depends on what the Program does. + + 1. You may copy and distribute verbatim copies of the Program's +source code as you receive it, in any medium, provided that you +conspicuously and appropriately publish on each copy an appropriate +copyright notice and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + + 2. You may modify your copy or copies of the Program or any portion +of it, thus forming a work based on the Program, and copy and +distribute such modifications or work under the terms of Section 1 +above, provided that you also meet all of these conditions: + + a) You must cause the modified files to carry prominent notices + stating that you changed the files and the date of any change. + + b) You must cause any work that you distribute or publish, that in + whole or in part contains or is derived from the Program or any + part thereof, to be licensed as a whole at no charge to all third + parties under the terms of this License. + + c) If the modified program normally reads commands interactively + when run, you must cause it, when started running for such + interactive use in the most ordinary way, to print or display an + announcement including an appropriate copyright notice and a + notice that there is no warranty (or else, saying that you provide + a warranty) and that users may redistribute the program under + these conditions, and telling the user how to view a copy of this + License. (Exception: if the Program itself is interactive but + does not normally print such an announcement, your work based on + the Program is not required to print an announcement.) + +These requirements apply to the modified work as a whole. If +identifiable sections of that work are not derived from the Program, +and can be reasonably considered independent and separate works in +themselves, then this License, and its terms, do not apply to those +sections when you distribute them as separate works. But when you +distribute the same sections as part of a whole which is a work based +on the Program, the distribution of the whole must be on the terms of +this License, whose permissions for other licensees extend to the +entire whole, and thus to each and every part regardless of who wrote it. + +Thus, it is not the intent of this section to claim rights or contest +your rights to work written entirely by you; rather, the intent is to +exercise the right to control the distribution of derivative or +collective works based on the Program. + +In addition, mere aggregation of another work not based on the Program +with the Program (or with a work based on the Program) on a volume of +a storage or distribution medium does not bring the other work under +the scope of this License. + + 3. You may copy and distribute the Program (or a work based on it, +under Section 2) in object code or executable form under the terms of +Sections 1 and 2 above provided that you also do one of the following: + + a) Accompany it with the complete corresponding machine-readable + source code, which must be distributed under the terms of Sections + 1 and 2 above on a medium customarily used for software interchange; o= r, + + b) Accompany it with a written offer, valid for at least three + years, to give any third party, for a charge no more than your + cost of physically performing source distribution, a complete + machine-readable copy of the corresponding source code, to be + distributed under the terms of Sections 1 and 2 above on a medium + customarily used for software interchange; or, + + c) Accompany it with the information you received as to the offer + to distribute corresponding source code. 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However, as a +special exception, the source code distributed need not include +anything that is normally distributed (in either source or binary +form) with the major components (compiler, kernel, and so on) of the +operating system on which the executable runs, unless that component +itself accompanies the executable. + +If distribution of executable or object code is made by offering +access to copy from a designated place, then offering equivalent +access to copy the source code from the same place counts as +distribution of the source code, even though third parties are not +compelled to copy the source along with the object code. + + 4. You may not copy, modify, sublicense, or distribute the Program +except as expressly provided under this License. Any attempt +otherwise to copy, modify, sublicense or distribute the Program is +void, and will automatically terminate your rights under this License. +However, parties who have received copies, or rights, from you under +this License will not have their licenses terminated so long as such +parties remain in full compliance. + + 5. You are not required to accept this License, since you have not +signed it. However, nothing else grants you permission to modify or +distribute the Program or its derivative works. These actions are +prohibited by law if you do not accept this License. Therefore, by +modifying or distributing the Program (or any work based on the +Program), you indicate your acceptance of this License to do so, and +all its terms and conditions for copying, distributing or modifying +the Program or works based on it. + + 6. Each time you redistribute the Program (or any work based on the +Program), the recipient automatically receives a license from the +original licensor to copy, distribute or modify the Program subject to +these terms and conditions. You may not impose any further +restrictions on the recipients' exercise of the rights granted herein. +You are not responsible for enforcing compliance by third parties to +this License. + + 7. If, as a consequence of a court judgment or allegation of patent +infringement or for any other reason (not limited to patent issues), +conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot +distribute so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you +may not distribute the Program at all. For example, if a patent +license would not permit royalty-free redistribution of the Program by +all those who receive copies directly or indirectly through you, then +the only way you could satisfy both it and this License would be to +refrain entirely from distribution of the Program. + +If any portion of this section is held invalid or unenforceable under +any particular circumstance, the balance of the section is intended to +apply and the section as a whole is intended to apply in other +circumstances. + +It is not the purpose of this section to induce you to infringe any +patents or other property right claims or to contest validity of any +such claims; this section has the sole purpose of protecting the +integrity of the free software distribution system, which is +implemented by public license practices. Many people have made +generous contributions to the wide range of software distributed +through that system in reliance on consistent application of that +system; it is up to the author/donor to decide if he or she is willing +to distribute software through any other system and a licensee cannot +impose that choice. + +This section is intended to make thoroughly clear what is believed to +be a consequence of the rest of this License. + + 8. If the distribution and/or use of the Program is restricted in +certain countries either by patents or by copyrighted interfaces, the +original copyright holder who places the Program under this License +may add an explicit geographical distribution limitation excluding +those countries, so that distribution is permitted only in or among +countries not thus excluded. In such case, this License incorporates +the limitation as if written in the body of this License. + + 9. The Free Software Foundation may publish revised and/or new versions +of the General Public License from time to time. Such new versions will +be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + +Each version is given a distinguishing version number. If the Program +specifies a version number of this License which applies to it and "any +later version", you have the option of following the terms and conditions +either of that version or of any later version published by the Free +Software Foundation. If the Program does not specify a version number of +this License, you may choose any version ever published by the Free Softwa= re +Foundation. + + 10. If you wish to incorporate parts of the Program into other free +programs whose distribution conditions are different, write to the author +to ask for permission. For software which is copyrighted by the Free +Software Foundation, write to the Free Software Foundation; we sometimes +make exceptions for this. Our decision will be guided by the two goals +of preserving the free status of all derivatives of our free software and +of promoting the sharing and reuse of software generally. + + NO WARRANTY + + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY +FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN +OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES +PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED +OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS +TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, +REPAIR OR CORRECTION. + + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; If not, see . + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show = w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/tools/proctrace/Makefile b/tools/proctrace/Makefile new file mode 100644 index 0000000000..76d7387a64 --- /dev/null +++ b/tools/proctrace/Makefile @@ -0,0 +1,50 @@ +# Copyright (C) CERT Polska - NASK PIB +# Author: Micha=C4=B9=E2=80=9A Leszczy=C4=B9=E2=80=9Eski +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; under version 2 of the License. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +XEN_ROOT=3D$(CURDIR)/../.. +include $(XEN_ROOT)/tools/Rules.mk + +CFLAGS +=3D -Werror +CFLAGS +=3D $(CFLAGS_libxenevtchn) +CFLAGS +=3D $(CFLAGS_libxenctrl) +LDLIBS +=3D $(LDLIBS_libxenctrl) +LDLIBS +=3D $(LDLIBS_libxenevtchn) +LDLIBS +=3D $(LDLIBS_libxenforeignmemory) + +# SCRIPTS =3D xenmon.py + +.PHONY: all +all: build + +.PHONY: build +build: proctrace + +.PHONY: install +install: build + $(INSTALL_DIR) $(DESTDIR)$(sbindir) + $(INSTALL_PROG) proctrace $(DESTDIR)$(sbindir)/proctrace + +.PHONY: uninstall +uninstall: + rm -f $(DESTDIR)$(sbindir)/proctrace + +.PHONY: clean +clean: + $(RM) -f $(DEPS_RM) + +.PHONY: distclean +distclean: clean + +iptlive: iptlive.o Makefile + $(CC) $(LDFLAGS) $< -o $@ $(LDLIBS) $(APPEND_LDFLAGS) + +-include $(DEPS_INCLUDE) diff --git a/tools/proctrace/proctrace.c b/tools/proctrace/proctrace.c new file mode 100644 index 0000000000..b2c3da49f1 --- /dev/null +++ b/tools/proctrace/proctrace.c @@ -0,0 +1,153 @@ +/*************************************************************************= ***** + * tools/proctrace.c + * + * Demonstrative tool for collecting Intel Processor Trace data from Xen. + * Could be used to externally monitor a given vCPU in given DomU. + * + * Copyright (C) 2020 by CERT Polska - NASK PIB + * + * Authors: Micha=C4=B9=E2=80=9A Leszczy=C4=B9=E2=80=9Eski, michal.leszczy= nski@cert.pl + * Date: June, 2020 + *=20 + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; under version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#define XC_WANT_COMPAT_MAP_FOREIGN_API +#include +#include + +#define BUF_SIZE 16384 * 4096 + +volatile int interrupted =3D 0; + +void term_handler(int signum) { + interrupted =3D 1; +} + +int main(int argc, char* argv[]) { + xc_interface *xc; + uint32_t domid; + uint32_t vcpu_id; + + int rc =3D -1; + uint8_t *buf; + uint64_t last_offset =3D 0; + + xenforeignmemory_handle* fmem; + xenforeignmemory_resource_handle *fres; + + signal(SIGINT, term_handler); + + if (argc !=3D 3) { + fprintf(stderr, "Usage: %s \n", argv[0]); + fprintf(stderr, "It's recommended to redirect this" + "program's output to file\n"); + fprintf(stderr, "or to pipe it's output to xxd or other program.\n= "); + return 1; + } + + domid =3D atoi(argv[1]); + vcpu_id =3D atoi(argv[2]); + + xc =3D xc_interface_open(0, 0, 0); + + fmem =3D xenforeignmemory_open(0, 0); + + if (!xc) { + fprintf(stderr, "Failed to open xc interface\n"); + return 1; + } + + rc =3D xc_vmtrace_ipt_enable(xc, domid, vcpu_id); + + if (rc) { + fprintf(stderr, "Failed to call xc_vmtrace_ipt_enable\n"); + return 1; + } + + fres =3D xenforeignmemory_map_resource( + fmem, domid, XENMEM_resource_vmtrace_buf, + /* vcpu: */ vcpu_id, + /* frame: */ 0, + /* num_frames: */ BUF_SIZE >> XC_PAGE_SHIFT, + (void **)&buf, + PROT_READ, 0); + + while (!interrupted) { + uint64_t offset; + rc =3D xc_vmtrace_ipt_get_offset(xc, domid, vcpu_id, &offset); + + if (rc) { + fprintf(stderr, "Failed to call xc_vmtrace_ipt_get_offset\n"); + return 1; + } + + if (offset > last_offset) + { + fwrite(buf + last_offset, offset - last_offset, 1, stdout); + } + else if (offset < last_offset) + { + // buffer wrapped + fwrite(buf + last_offset, BUF_SIZE - last_offset, 1, stdout); + fwrite(buf, offset, 1, stdout); + } + + last_offset =3D offset; + usleep(1000 * 100); + } + + rc =3D xenforeignmemory_unmap_resource(fmem, fres); + + if (rc) { + fprintf(stderr, "Failed to unmap resource\n"); + return 1; + } + + rc =3D xc_vmtrace_ipt_disable(xc, domid, vcpu_id); + + if (rc) { + fprintf(stderr, "Failed to call xc_vmtrace_ipt_disable\n"); + return 1; + } + + return 0; +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ --=20 2.20.1