similar to: Question related to Single-step execution and Emulation

Hi there, I have a question regarding the functionality of x86_emulate_memop (Xen 3.1) or x86_emulate (Xen 3.2) function. This function gets called from sh_page_fault() function which is invoked when Xen receives a page fault. Since I am not clear completely about the emulation operation performed by Xen, I have following questions with a below mentioned scenario? 1) Suppose I have a memory

Hi all, Does anyone have thoughts on extending v->arch.hvm_vcpu.single_step to support pre-MTF systems, in a way that would mimic the MTF? So far I''m emulating PUSHF/POPF to hide the hypervisor''s trap flag, and eventually I''ll multiplex it down to the guest, but I''m having issues. Right now, I''m enabling X86_EFLAGS_TF in vmx_intr_assist, just like

Hi Bastian, Ian, while I was working on the recent batch of security updates I noticed that the obvious backport of the related patch caused an HVM guest to be crashed as soon as a user inside that guest tried to ptrace a child process. While talking to Jan, I realized that in 4.2 the inject exception code subtly changed in a way that treats TRAP_debug as a HW event (that is triggered by no

Changes from v1: - Define new struct hvm_trap to represent information of trap, include instruction length. - Renames hvm_inject_exception to hvm_inject_trap. Then define a couple of wrappers around that function for existing callers, so that their parameter lists actually *shrink*. This series of patches fix the mistake for debug exception(#DB), overflow exception(#OF) and INT3(#BP),

This series of patches fix the mistake for debug exception(#DB), overflow exception(#OF) and INT3(#BP), INTn instruction emulation. Introduce new function vmx_inject_sw_exception() which deliver the software excetion, software interrupt and privileged software exception. Split hardware exception as a seperate function(old function vmx_inject_hw_exception()). Also Passed down intruction length

Fix the mistake for debug exception(#DB), overflow exception(#OF; generated by INTO) and int 3(#BP) instruction emulation. For INTn (CD ib), it should use type 4 (software interrupt). For INT3 (CC; NOT CD ib with ib=3) and INTO (CE; NOT CD ib with ib=4), it should use type 6 (software exception). For other exceptions (#DE, #DB, #BR, #UD, #NM, #TS, #NP, #SS, #GP, #PF, #MF, #AC, #MC, and #XM), it

Here is a second version of my patch from last night. It uses the provided ctype function isspace and does the same readdir(). I remove the rosh_issp() function. I admit to being a bit liberal with my use of braces and spaces. We all of the habit of knowing we can invent a more perfect wheel. Let me know if you have any questions. Keith -------------- next part -------------- A non-text

Hey Guys, Below is a patch for the com32/rosh/rosh.c from tonights syslinx git. The patch does the following: 1) changes the rosh_issp to use an if instead of a case for this simple test. 2) changes the rosh_dir_arg function to move the readdir() to inside the while test. This will let me go through my APUE book. Let me know if you have any questions. Keith --- rosh.orig 2009-03-05

Here are a few warning-removal changes for daemon/: >From eea38a1937ccd396603ed899d829d2982755ea4a Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering at redhat.com> Date: Thu, 6 Aug 2009 15:25:03 +0200 Subject: [PATCH 1/4] define ATTRIBUTE_UNUSED * daemon/daemon.h (__attribute__, ATTRIBUTE_UNUSED): Define. --- daemon/daemon.h | 10 ++++++++++ 1 files changed, 10 insertions(+), 0

Hi, Attached patch implements the VMCB cleanbits SVM feature. Upcoming AMD CPUs introduce them and they are basically hints for the CPU which vmcb values can be re-used from the previous VMRUN instruction. Each bit represents a certain set of fields in the VMCB. Setting a bit tells the cpu it can re-use the cached value from the previous VMRUN. Clearing a bit tells the cpu to reload the values

Is there any trouble with mailing list? I didn''t see my mail sent back after almost 8hrs. :-( Thanks, Kevin -----Original Message----- From: Tian, Kevin Sent: 2008年2月22日 10:33 To: ''Tim Deegan'' Cc: xen-devel@lists.xensource.com Subject: [PATCH][UPDATE]Remove lock on guest table walk >From: Tim Deegan >Sent: 2008年2月21日 22:13 >Hi, > >So, the idea seems

Hi all, I am having confusion regarding the way a newly created domain is allocated vcpu. Initially during dom0 creation alloc_vcpu is called to create vcpu structs for all the available cpu''s and assigned to dom0. But its not the case for domU creation. 1. So how will dom0 relinquish/share vcpu to/with a newly created domU. Does this happen as part of the shared_info page mapping??

We recently observed a problem with Solaris HVM domains. The bug was seen was seen with a higher number of VCPUs (3 or more), and always had the same pattern: some memory was allocated in the guest, but the first reference caused it to crash with a fatal pagefault. However, on inspection of the page tables, the guests'' view of the pagetables was consistent: the page was present.

In sh_page_fault(), there are some code like following, why we think it is mmio only when paging_vcpu_mode_translate(v)? Thanks Yunhong Jiang /* What mfn is the guest trying to access? */ gfn = guest_l1e_get_gfn(gw.eff_l1e); gmfn = vcpu_gfn_to_mfn(v, gfn); mmio = (is_hvm_domain(d) && paging_vcpu_mode_translate(v) &&

From: Gene Cumm <gene.cumm at gmail.com> alias.c: A simple COM32 module that allows the creation of an alias within the config for SYSLINUX, etc. Signed-off-by: Gene Cumm <gene.cumm at gmail.com> --- If, for example, you had two labels that only differed by the length of the label (a short name) or additional APPENDd parameters, this would reduce the amount of copies of the same

Hello, The fast emulation path patch introduced a bug when we have an event injection during a write to a pagetable: after removing shadows we still jump to the done label, releasing the lock even if we aren''t grabbing it. Inline patch fixes this. Signed-off-by: Gianluca Guida <gianluca.guida@eu.citrix.com> diff -r 8848d9e07584 xen/arch/x86/mm/shadow/multi.c ---

hi,all has anyone set the eflags.TF of vm? I want to introdeuce a VM into single-step by setting the eflags.TF of vm, then I disassemble the bytes at RIP to figure out what''s going on . I have set the trap flag ,but I didn''t achieve what I want. First, I only get hlt,mov, rdtsc, clts, in, out . Second, the VM always crash. does anyone have experience and give

Hi All, I have several questions about log dirty mode during live migration. For my understanding, each time after XEN_DOMCTL_SHADOW_OP_CLEAN or XEN_DOMCTL_SHADOW_OP_PEEK operation, all the pages are set as read only. The following memory accesses to the memory pages will cause page fault (permission conflict) then using page_mark_dirty function to set the dirty bitmap. However, after I read

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com> -- ---to satisfy European Law for business letters: Advanced Micro Devices GmbH Einsteinring 24, 85609 Dornach b. Muenchen Geschaeftsfuehrer: Alberto Bozzo, Andrew Bowd Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen Registergericht Muenchen, HRB Nr. 43632 _______________________________________________ Xen-devel mailing list

This patch series contains a set of patches making minios rather easier to use, from an application development point of view. Overview of patches: 1 Command line argument parsing support, from Xen. 2 Weak console handler function. 3 Build system tweaks for application directories. 4 Trailing whitespace cleanup. (because it is very messy) Patch 4 is likely to be more controversial than