search for: x86_emulate_memop

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) Supp...

...gcc -O2 or gcc -Os. Ian, Keir, which of these approaches do you prefer? Currently the top stack users are: $ objdump -dS xen-syms | ./checkstack.pl x86_64 0xffff8300001c7c47 find_unisys_acpi_oem_table: 1296 0xffff83000011182e do_xen_version: 1280 0xffff83000015bc3e x86_emulate_memop: 1264 0xffff8300001adbaa vmx_world_save: 1040 0xffff8300001aeac5 vmx_world_save: 1040 0xffff830000106800 do_dom0_op: 968 0xffff8300001080cf do_dom0_op: 968 0xffff830000137c64 construct_dom0...

> Hmmm... wouldn''t it be nice if we didn''t have a bespoke, > buggy & incomplete emulator for hvm mmio. ;-) In the process of solving this one, I''ve got to (another) of the blocking points... At the moment, we translate the virtual address from the guest in the page-fault-handler to guest physical address via the gva_to_gpa() function in svm.c/vmx.c:

We saw these issues in recent ChangeSet: 1. Reboot fail in Guest OS: Reboot in guest will close current qemu windows but does not create a new qemu window to restart 32bit HV/xen0: 2. 4 LTP math cases(float_bessel, float_exp_log, float_power and float_trigo) sometime fail. (775) 3. Kernel build in VMX may meet kernel panic. It complains like: "<0> Kernel panic - not syncing:

Am I right in thinking that the numbering of the versions are in synch with the gcc version that one is recommened to build with? In other words "use gcc version 3.foo". -- John Maclean - 07739 171 531 MSc (DIC) _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

We (Michael Fetterman, George Dunlap and I) have been working over the last while on a full replacement for Xen''s shadow pagetable support. This mail contains some design notes, below; a patch against xen-unstable, giving a snapshot of the current state of the new shadow code, is at http://www.cl.cam.ac.uk/~tjd21/shadow2.patch Comments on both are welcome, although the code is not