From: pbonzini@redhat.com (Paolo Bonzini)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/7] KVM: arm: guest debug, define API headers
Date: Tue, 25 Nov 2014 18:22:32 +0100 [thread overview]
Message-ID: <5474BAD8.7010307@redhat.com> (raw)
In-Reply-To: <CAFEAcA-ikeiciAh4RXpKQQ_pY9FRePxR7nEBUEjcaaxB0ZAAtA@mail.gmail.com>
On 25/11/2014 18:13, Peter Maydell wrote:
> On 25 November 2014 at 17:05, Paolo Bonzini <pbonzini@redhat.com> wrote:
>> > So there is no register that says "this breakpoint has triggered" or
>> > "this watchpoint has triggered"?
> Nope. You take a debug exception; the syndrome register tells
> you if it was a bp or a wp, and if it was a wp the fault address
> register tells you the address being accessed (if it was a bp
> you know the program counter, obviously). The debugger is expected
> to be able to figure it out from there, if it cares.
That's already good enough---do the KVM_DEBUG_EXIT_* constants match the
syndrome register, or if not why?
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: "Alex Bennée" <alex.bennee@linaro.org>,
kvm-devel <kvm@vger.kernel.org>,
arm-mail-list <linux-arm-kernel@lists.infradead.org>,
"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
"Christoffer Dall" <christoffer.dall@linaro.org>,
"Marc Zyngier" <marc.zyngier@arm.com>,
"Alexander Graf" <agraf@suse.de>,
"J. Kiszka" <jan.kiszka@siemens.com>,
"David Hildenbrand" <dahi@linux.vnet.ibm.com>,
"Bharat Bhushan" <r65777@freescale.com>,
bp@suse.de, "Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will.deacon@arm.com>,
"open list" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/7] KVM: arm: guest debug, define API headers
Date: Tue, 25 Nov 2014 18:22:32 +0100 [thread overview]
Message-ID: <5474BAD8.7010307@redhat.com> (raw)
In-Reply-To: <CAFEAcA-ikeiciAh4RXpKQQ_pY9FRePxR7nEBUEjcaaxB0ZAAtA@mail.gmail.com>
On 25/11/2014 18:13, Peter Maydell wrote:
> On 25 November 2014 at 17:05, Paolo Bonzini <pbonzini@redhat.com> wrote:
>> > So there is no register that says "this breakpoint has triggered" or
>> > "this watchpoint has triggered"?
> Nope. You take a debug exception; the syndrome register tells
> you if it was a bp or a wp, and if it was a wp the fault address
> register tells you the address being accessed (if it was a bp
> you know the program counter, obviously). The debugger is expected
> to be able to figure it out from there, if it cares.
That's already good enough---do the KVM_DEBUG_EXIT_* constants match the
syndrome register, or if not why?
Paolo
next prev parent reply other threads:[~2014-11-25 17:22 UTC|newest]
Thread overview: 109+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-25 16:09 [PATCH 0/7] KVM Guest Debug support for arm64 Alex Bennée
2014-11-25 16:09 ` Alex Bennée
2014-11-25 16:09 ` [PATCH 1/7] KVM: add commentary for kvm_debug_exit_arch struct Alex Bennée
2014-11-25 16:09 ` Alex Bennée
2014-11-25 16:09 ` Alex Bennée
[not found] ` <1416931805-23223-2-git-send-email-alex.bennee-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2014-11-26 14:20 ` Andrew Jones
2014-11-26 14:20 ` Andrew Jones
2014-11-26 14:20 ` Andrew Jones
2014-11-25 16:10 ` [PATCH 2/7] KVM: arm: guest debug, define API headers Alex Bennée
2014-11-25 16:10 ` Alex Bennée
2014-11-25 16:19 ` Peter Maydell
2014-11-25 16:19 ` Peter Maydell
2014-11-26 15:04 ` Alex Bennée
2014-11-26 15:04 ` Alex Bennée
2014-11-29 16:20 ` Christoffer Dall
2014-11-29 16:20 ` Christoffer Dall
2014-12-01 11:30 ` Alex Bennée
2014-12-01 11:30 ` Alex Bennée
2014-11-25 17:05 ` Paolo Bonzini
2014-11-25 17:05 ` Paolo Bonzini
2014-11-25 17:13 ` Peter Maydell
2014-11-25 17:13 ` Peter Maydell
2014-11-25 17:22 ` Paolo Bonzini [this message]
2014-11-25 17:22 ` Paolo Bonzini
2014-11-26 13:13 ` Alex Bennée
2014-11-26 13:13 ` Alex Bennée
2014-11-26 13:14 ` Paolo Bonzini
2014-11-26 13:14 ` Paolo Bonzini
2014-11-26 14:31 ` Andrew Jones
2014-11-26 14:31 ` Andrew Jones
2014-11-26 14:58 ` Alex Bennée
2014-11-26 14:58 ` Alex Bennée
2014-11-26 16:46 ` Paolo Bonzini
2014-11-26 16:46 ` Paolo Bonzini
2014-11-26 17:47 ` Andrew Jones
2014-11-26 17:47 ` Andrew Jones
2014-11-29 16:20 ` Christoffer Dall
2014-11-29 16:20 ` Christoffer Dall
2014-11-25 16:10 ` [PATCH 3/7] KVM: arm: guest debug, add stub KVM_SET_GUEST_DEBUG ioctl Alex Bennée
2014-11-25 16:10 ` Alex Bennée
2014-11-26 14:38 ` Andrew Jones
2014-11-26 14:38 ` Andrew Jones
2014-11-26 15:03 ` Alex Bennée
2014-11-26 15:03 ` Alex Bennée
2014-11-26 16:46 ` Paolo Bonzini
2014-11-26 16:46 ` Paolo Bonzini
2014-11-29 16:21 ` Christoffer Dall
2014-11-29 16:21 ` Christoffer Dall
2014-11-25 16:10 ` [PATCH 4/7] KVM: arm64: guest debug, add SW break point support Alex Bennée
2014-11-25 16:10 ` Alex Bennée
2014-11-26 16:07 ` Andrew Jones
2014-11-26 16:07 ` Andrew Jones
2014-11-26 17:14 ` Peter Maydell
2014-11-26 17:14 ` Peter Maydell
2014-11-29 16:21 ` Christoffer Dall
2014-11-29 16:21 ` Christoffer Dall
2014-11-29 16:21 ` Christoffer Dall
2014-11-29 16:21 ` Christoffer Dall
2014-12-01 11:33 ` Alex Bennée
2014-12-01 11:33 ` Alex Bennée
2014-11-25 16:10 ` [PATCH 5/7] KVM: arm64: guest debug, add support for single-step Alex Bennée
2014-11-25 16:10 ` Alex Bennée
2014-11-25 16:10 ` Alex Bennée
[not found] ` <1416931805-23223-6-git-send-email-alex.bennee-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2014-11-26 16:40 ` Andrew Jones
2014-11-26 16:40 ` Andrew Jones
2014-11-26 16:40 ` Andrew Jones
[not found] ` <20141126164057.GE3245-EoAxxbxdFnFvD/m4c++uL6fLeoKvNuZc@public.gmane.org>
2014-11-26 18:00 ` Alex Bennée
2014-11-26 18:00 ` Alex Bennée
2014-11-26 18:00 ` Alex Bennée
2014-11-26 18:00 ` Alex Bennée
2014-11-26 19:27 ` Peter Maydell
2014-11-26 19:27 ` Peter Maydell
2014-11-26 19:27 ` Peter Maydell
[not found] ` <CAFEAcA-cjM9yUXi6tc79UP0fBKAagtFKQgV3iAjz5DWr9yxZUQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-11-30 10:10 ` Christoffer Dall
2014-11-30 10:10 ` Christoffer Dall
2014-11-30 10:10 ` Christoffer Dall
2014-11-30 10:20 ` Peter Maydell
2014-11-30 10:20 ` Peter Maydell
2014-11-30 10:20 ` Peter Maydell
2014-11-30 10:21 ` Christoffer Dall
2014-11-30 10:21 ` Christoffer Dall
2014-12-01 11:50 ` Alex Bennée
2014-12-01 11:50 ` Alex Bennée
2014-12-01 11:50 ` Alex Bennée
2014-12-01 11:50 ` Alex Bennée
[not found] ` <87r3wj1te1.fsf-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2014-12-02 13:17 ` Christoffer Dall
2014-12-02 13:17 ` Christoffer Dall
2014-12-02 13:17 ` Christoffer Dall
2014-11-25 16:10 ` [PATCH 6/7] KVM: arm64: re-factor hyp.S debug register code Alex Bennée
2014-11-25 16:10 ` Alex Bennée
2014-11-26 16:49 ` Andrew Jones
2014-11-26 16:49 ` Andrew Jones
2014-11-30 10:25 ` Christoffer Dall
2014-11-30 10:25 ` Christoffer Dall
2014-12-01 11:52 ` Alex Bennée
2014-12-01 11:52 ` Alex Bennée
2014-12-02 13:23 ` Christoffer Dall
2014-12-02 13:23 ` Christoffer Dall
2014-11-25 16:10 ` [PATCH 7/7] KVM: arm64: guest debug, HW assisted debug support Alex Bennée
2014-11-25 16:10 ` Alex Bennée
2014-11-25 16:10 ` Alex Bennée
[not found] ` <1416931805-23223-8-git-send-email-alex.bennee-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2014-11-26 17:34 ` Andrew Jones
2014-11-26 17:34 ` Andrew Jones
2014-11-26 17:34 ` Andrew Jones
2014-11-30 10:34 ` Christoffer Dall
2014-11-30 10:34 ` Christoffer Dall
2014-12-01 11:54 ` Alex Bennée
2014-12-01 11:54 ` Alex Bennée
2014-12-01 11:54 ` Alex Bennée
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