search for: xc_hvm_set_mem_access

I have a 12GB 64-bit Linux HVM guest (CentOS 5.5). When I look at the e820 map in the guest, I see the following: BIOS-provided physical RAM map: BIOS-e820: 0000000000010000 - 000000000009e000 (usable) BIOS-e820: 000000000009e000 - 00000000000a0000 (reserved) BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 00000000f0000000 (usable) BIOS-e820:

...ut I''m interested in capturing write events anywhere in a domU guest''s memory, _and_ not just once for each page write, but every time a page is being written to. To this end, I''ve looked at the xen-access.c example, where at first all the pages are being monitored: xc_hvm_set_mem_access(xch, domain_id, HVMMEM_access_rx, ~0ull, 0); xc_hvm_set_mem_access(xch, domain_id, HVMMEM_access_rx, 0, xenaccess->domain_info->max_pages); Then, after an event is received: xc_hvm_set_mem_access(xch, domain_id, HVMMEM_access_rwx, req.gfn, 1); thus allowing ''rwx'' access...

...n_id, required); + rc = xc_domain_set_access_required(xch, domain_id, required); + if ( rc < 0 ) + { + ERROR("Error %d setting mem_access listener required\n", rc); + goto exit; + } /* Set the default access type and convert all pages to it */ rc = xc_hvm_set_mem_access(xch, domain_id, default_access, ~0ull, 0); - rc = xc_hvm_set_mem_access(xch, domain_id, default_access, 0, xenaccess->domain_info->max_pages); + if ( rc < 0 ) + { + ERROR("Error %d setting default mem access type\n", rc); + goto exit; + } + + rc = xc_...