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From: Mark Rutland <mark.rutland@arm.com>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
	"christoffer.dall@linaro.org" <christoffer.dall@linaro.org>,
	Marc Zyngier <Marc.Zyngier@arm.com>,
	"peter.maydell@linaro.org" <peter.maydell@linaro.org>,
	"agraf@suse.de" <agraf@suse.de>,
	"drjones@redhat.com" <drjones@redhat.com>,
	"pbonzini@redhat.com" <pbonzini@redhat.com>,
	"zhichao.huang@linaro.org" <zhichao.huang@linaro.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
	Russell King <linux@arm.linux.org.uk>,
	Jonathan Corbet <corbet@lwn.net>, Gleb Natapov <gleb@kernel.org>,
	"jan.kiszka@siemens.com" <jan.kiszka@siemens.com>,
	"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
	Will Deacon <Will.Deacon@arm.com>,
	open list <linux-kernel@vger.kernel.org>"open list:ABI/API"
	<linu>
Subject: Re: [PATCH v4 10/12] KVM: arm64: guest debug, HW assisted debug support
Date: Fri, 15 May 2015 18:01:14 +0100	[thread overview]
Message-ID: <20150515170114.GD23652@leverpostej> (raw)
In-Reply-To: <87y4kpke91.fsf@linaro.org>

> > This gets more fun when you consider the context-aware breakpoints are
> > the highest numbered. So the set of (context-aware) breakpoints might
> > not intersect across all CPUs.
> 
> I didn't see a reference to that in the ARM ARM. It seemed to imply any
> breakpoint could be context aware is .BT was appropriately set and
> linked to the VR.  

The existence of ID_AA64_DFR0_EL1.CTX_CMPs implies otherwise, though I
haven't dug much deeper.

Thanks,
Mark.

WARNING: multiple messages have this Message-ID (diff)
From: mark.rutland@arm.com (Mark Rutland)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 10/12] KVM: arm64: guest debug, HW assisted debug support
Date: Fri, 15 May 2015 18:01:14 +0100	[thread overview]
Message-ID: <20150515170114.GD23652@leverpostej> (raw)
In-Reply-To: <87y4kpke91.fsf@linaro.org>

> > This gets more fun when you consider the context-aware breakpoints are
> > the highest numbered. So the set of (context-aware) breakpoints might
> > not intersect across all CPUs.
> 
> I didn't see a reference to that in the ARM ARM. It seemed to imply any
> breakpoint could be context aware is .BT was appropriately set and
> linked to the VR.  

The existence of ID_AA64_DFR0_EL1.CTX_CMPs implies otherwise, though I
haven't dug much deeper.

Thanks,
Mark.

WARNING: multiple messages have this Message-ID (diff)
From: Mark Rutland <mark.rutland@arm.com>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
	"christoffer.dall@linaro.org" <christoffer.dall@linaro.org>,
	Marc Zyngier <Marc.Zyngier@arm.com>,
	"peter.maydell@linaro.org" <peter.maydell@linaro.org>,
	"agraf@suse.de" <agraf@suse.de>,
	"drjones@redhat.com" <drjones@redhat.com>,
	"pbonzini@redhat.com" <pbonzini@redhat.com>,
	"zhichao.huang@linaro.org" <zhichao.huang@linaro.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
	Russell King <linux@arm.linux.org.uk>,
	Jonathan Corbet <corbet@lwn.net>, Gleb Natapov <gleb@kernel.org>,
	"jan.kiszka@siemens.com" <jan.kiszka@siemens.com>,
	"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
	Will Deacon <Will.Deacon@arm.com>,
	open list <linux-kernel@vger.kernel.org>,
	"open list:ABI/API" <linu
Subject: Re: [PATCH v4 10/12] KVM: arm64: guest debug, HW assisted debug support
Date: Fri, 15 May 2015 18:01:14 +0100	[thread overview]
Message-ID: <20150515170114.GD23652@leverpostej> (raw)
In-Reply-To: <87y4kpke91.fsf@linaro.org>

> > This gets more fun when you consider the context-aware breakpoints are
> > the highest numbered. So the set of (context-aware) breakpoints might
> > not intersect across all CPUs.
> 
> I didn't see a reference to that in the ARM ARM. It seemed to imply any
> breakpoint could be context aware is .BT was appropriately set and
> linked to the VR.  

The existence of ID_AA64_DFR0_EL1.CTX_CMPs implies otherwise, though I
haven't dug much deeper.

Thanks,
Mark.

WARNING: multiple messages have this Message-ID (diff)
From: Mark Rutland <mark.rutland@arm.com>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
	"christoffer.dall@linaro.org" <christoffer.dall@linaro.org>,
	Marc Zyngier <Marc.Zyngier@arm.com>,
	"peter.maydell@linaro.org" <peter.maydell@linaro.org>,
	"agraf@suse.de" <agraf@suse.de>,
	"drjones@redhat.com" <drjones@redhat.com>,
	"pbonzini@redhat.com" <pbonzini@redhat.com>,
	"zhichao.huang@linaro.org" <zhichao.huang@linaro.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
	Russell King <linux@arm.linux.org.uk>,
	Jonathan Corbet <corbet@lwn.net>, Gleb Natapov <gleb@kernel.org>,
	"jan.kiszka@siemens.com" <jan.kiszka@siemens.com>,
	"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
	Will Deacon <Will.Deacon@arm.com>,
	open list <linux-kernel@vger.kernel.org>,
	"open list:ABI/API" <linux-api@vger.kernel.org>,
	"dahi@linux.vnet.ibm.com" <dahi@linux.vnet.ibm.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Catalin Marinas <Catalin.Marinas@arm.com>,
	"r65777@freescale.com" <r65777@freescale.com>,
	"bp@suse.de" <bp@suse.de>, Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH v4 10/12] KVM: arm64: guest debug, HW assisted debug support
Date: Fri, 15 May 2015 18:01:14 +0100	[thread overview]
Message-ID: <20150515170114.GD23652@leverpostej> (raw)
In-Reply-To: <87y4kpke91.fsf@linaro.org>

> > This gets more fun when you consider the context-aware breakpoints are
> > the highest numbered. So the set of (context-aware) breakpoints might
> > not intersect across all CPUs.
> 
> I didn't see a reference to that in the ARM ARM. It seemed to imply any
> breakpoint could be context aware is .BT was appropriately set and
> linked to the VR.  

The existence of ID_AA64_DFR0_EL1.CTX_CMPs implies otherwise, though I
haven't dug much deeper.

Thanks,
Mark.

  reply	other threads:[~2015-05-15 17:01 UTC|newest]

Thread overview: 95+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-15 14:27 [PATCH v4 00/12] KVM Guest Debug support for arm64 Alex Bennée
2015-05-15 14:27 ` Alex Bennée
2015-05-15 14:27 ` [PATCH v4 01/12] KVM: add comments for kvm_debug_exit_arch struct Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27 ` [PATCH v4 02/12] KVM: define common KVM_GUESTDBG_USE_SW/HW_BP bits Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 15:42   ` Christian Borntraeger
2015-05-15 15:42     ` Christian Borntraeger
2015-05-15 15:42     ` Christian Borntraeger
     [not found]     ` <555613F2.9060204-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
2015-05-15 17:33       ` David Hildenbrand
2015-05-15 17:33         ` David Hildenbrand
2015-05-15 17:33         ` David Hildenbrand
2015-05-15 17:33         ` David Hildenbrand
2015-05-15 17:46         ` Jan Kiszka
2015-05-15 17:46           ` Jan Kiszka
2015-05-15 15:58   ` Christian Borntraeger
2015-05-15 15:58     ` Christian Borntraeger
2015-05-15 15:58     ` Christian Borntraeger
2015-05-15 15:58     ` Christian Borntraeger
2015-05-15 15:58     ` Christian Borntraeger
2015-05-15 14:27 ` [PATCH v4 03/12] KVM: arm64: guest debug, define API headers Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:44   ` Mark Rutland
2015-05-15 14:44     ` Mark Rutland
2015-05-15 15:14     ` Alex Bennée
2015-05-15 15:14       ` Alex Bennée
2015-05-15 15:14       ` Alex Bennée
2015-05-15 15:17       ` Peter Maydell
2015-05-15 15:17         ` Peter Maydell
2015-05-15 15:17         ` Peter Maydell
2015-05-15 15:43         ` Alex Bennée
2015-05-15 15:43           ` Alex Bennée
2015-05-15 15:43           ` Alex Bennée
2015-05-15 15:43         ` Mark Rutland
2015-05-15 15:43           ` Mark Rutland
2015-05-15 15:43           ` Mark Rutland
2015-05-15 16:19           ` Alex Bennée
2015-05-15 16:19             ` Alex Bennée
2015-05-15 16:19             ` Alex Bennée
2015-05-15 14:27 ` [PATCH v4 04/12] KVM: arm: guest debug, add stub KVM_SET_GUEST_DEBUG ioctl Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27 ` [PATCH v4 05/12] KVM: arm: introduce kvm_arm_init/setup/clear_debug Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27 ` [PATCH v4 06/12] KVM: arm64: guest debug, add SW break point support Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-20  9:17   ` Will Deacon
2015-05-20  9:17     ` Will Deacon
2015-05-20  9:17     ` Will Deacon
2015-05-20  9:17     ` Will Deacon
2015-05-20 12:33     ` Alex Bennée
2015-05-20 12:33       ` Alex Bennée
2015-05-20 12:33       ` Alex Bennée
2015-05-20 12:33       ` Alex Bennée
2015-05-15 14:27 ` [PATCH v4 07/12] KVM: arm64: guest debug, add support for single-step Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27 ` [PATCH v4 08/12] KVM: arm64: re-factor hyp.S debug register code Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27 ` [PATCH v4 09/12] KVM: arm64: introduce vcpu->arch.debug_ptr Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27 ` [PATCH v4 10/12] KVM: arm64: guest debug, HW assisted debug support Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
     [not found]   ` <1431700035-23479-11-git-send-email-alex.bennee-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2015-05-15 15:23     ` Mark Rutland
2015-05-15 15:23       ` Mark Rutland
2015-05-15 15:23       ` Mark Rutland
2015-05-15 15:23       ` Mark Rutland
2015-05-15 16:16       ` Alex Bennée
2015-05-15 16:16         ` Alex Bennée
2015-05-15 16:16         ` Alex Bennée
2015-05-15 16:16         ` Alex Bennée
2015-05-15 17:01         ` Mark Rutland [this message]
2015-05-15 17:01           ` Mark Rutland
2015-05-15 17:01           ` Mark Rutland
2015-05-15 17:01           ` Mark Rutland
2015-05-15 17:09         ` Peter Maydell
2015-05-15 17:09           ` Peter Maydell
2015-05-15 17:09           ` Peter Maydell
2015-05-15 17:09           ` Peter Maydell
2015-05-15 14:27 ` [PATCH v4 11/12] KVM: arm64: enable KVM_CAP_SET_GUEST_DEBUG Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27 ` [PATCH v4 12/12] KVM: arm64: add trace points for guest_debug debug Alex Bennée
2015-05-15 14:27   ` Alex Bennée
2015-05-15 14:27   ` Alex Bennée

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