From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: [PATCH 2/7] KVM: arm: guest debug, define API headers Date: Tue, 25 Nov 2014 18:22:32 +0100 Message-ID: <5474BAD8.7010307@redhat.com> References: <1416931805-23223-1-git-send-email-alex.bennee@linaro.org> <1416931805-23223-3-git-send-email-alex.bennee@linaro.org> <5474B6BC.2060309@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: =?UTF-8?B?QWxleCBCZW5uw6ll?= , kvm-devel , arm-mail-list , "kvmarm@lists.cs.columbia.edu" , Christoffer Dall , Marc Zyngier , Alexander Graf , "J. Kiszka" , David Hildenbrand , Bharat Bhushan , bp@suse.de, Catalin Marinas , Will Deacon , open list To: Peter Maydell Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On 25/11/2014 18:13, Peter Maydell wrote: > On 25 November 2014 at 17:05, Paolo Bonzini 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