From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aravindh Puthiyaparambil Subject: Re: [PATCH] mem_event: Allow memory access listener to perform single step execution Date: Sat, 28 May 2011 10:48:18 -0700 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Keir Fraser Cc: "xen-devel@lists.xensource.com" , Tim Deegan List-Id: xen-devel@lists.xenproject.org On Sat, May 28, 2011 at 12:53 AM, Keir Fraser wrote: > I removed and unrelated and pointless change that broke the x86_32 build,= as > c/s 23435. If that change is okay for you, I could backport the combinati= on > of 23434+23435 to 4.1.1. Keir, Sorry about the build breakage. I will test the 32-bit side of things also in the future. I did not realize VCPU pausing was nestable. So even after the vcpu_unpause() in hvm_debug_op(), the VCPU will still be paused because of the vcpu_pause() in p2m_mem_access_check()? If that is the case I am fine with the combination for 4.1.1. Thanks, Aravindh > =A0-- Keir > > On 27/05/2011 17:36, "Aravindh Puthiyaparambil" > wrote: > >> Can this be included in xen-4.1-testing.hg too so that it could make the= Xen >> 4.1.1 cut? >> >> Thanks, >> Aravindh >> >> On May 27, 2011 1:39 AM, "Tim Deegan" wrote: >>> At 04:39 +0100 on 27 May (1306471145), Aravindh Puthiyaparambil wrote: >>>> mem_event: Allow memory access listener to perform single step executi= on. >>>> Add a new memory event that handles single step. This allows the memor= y >>>> access listener to handle instructions that modify data within the exe= cution >>>> page. >>>> This can be enabled in the listener by doing: >>>> xc_set_hvm_param(xch, domain_id, HVM_PARAM_MEMORY_EVENT_SINGLE_STEP, >>>> HVMPME_mode_sync) >>>> >>>> Now the listener can start single stepping by: >>>> xc_domain_debug_control(xch, domain_id, XEN_DOMCTL_DEBUG_OP_SINGLE_STE= P_ON, >>>> vcpu_id) >>>> >>>> And stop single stepping by: >>>> xc_domain_debug_control(xch, domain_id, XEN_DOMCTL_DEBUG_OP_SINGLE_STE= P_OFF, >>>> vcpu_id) >>>> >>>> Signed-off-by: Aravindh Puthiyaparambil >>> >>> Acked-by: Tim Deegan >>> >>> -- >>> Tim Deegan >>> Principal Software Engineer, Xen Platform Team >>> Citrix Systems UK Ltd. =A0(Company #02937203, SL9 0BG) >> >> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@lists.xensource.com >> http://lists.xensource.com/xen-devel > > >