search for: pfec

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

...o an MFN, injecting a page-fault if we fail */ +#define BAD_GVA_TO_GFN (~0UL) +#define BAD_GFN_TO_MFN (~1UL) +#define READONLY_GFN (~2UL) +static mfn_t emulate_gva_to_mfn( + struct vcpu *v, + unsigned long vaddr) +{ + unsigned long gfn; + mfn_t mfn; + p2m_type_t p2mt; + uint32_t pfec = PFEC_page_present | PFEC_write_access; + + /* Translate the VA to a GFN */ + gfn = paging_gva_to_gfn(v, vaddr, &pfec); + if ( gfn == INVALID_GFN ) + { + hvm_inject_exception(TRAP_page_fault, pfec, vaddr); + return _mfn(BAD_GVA_TO_GFN); + } + + /* Translate the...

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),

...//xenbits.xensource.com/gitweb?p=osstest.git;a=summary Not pushing. ------------------------------------------------------------ changeset: 25705:983ea7521bad tag: tip user: Tim Deegan <tim@xen.org> date: Thu Aug 02 14:44:53 2012 +0100 nestedhvm: return the pfec from the pagetable walk. Don''t clobber it with the pfec from teh p2m walk behind it; the guest will not expect (or be able to handle) error codes that come from the p2m table, which it can''t see or control. Signed-off-by: Tim Deegan <tim@xen.org>...

From: Zhang Xiantao <xiantao.zhang@intel.com> With virtual EPT support, L1 hyerpvisor can use EPT hardware for L2 guest''s memory virtualization. In this way, L2 guest''s performance can be improved sharply. According to our testing, some benchmarks can show > 5x performance gain. Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com> Zhang Xiantao (11):

...hvm_memory_event_traps(current->domain->arch.hvm_domain + .params[HVM_PARAM_MEMORY_EVENT_MSR], + MEM_EVENT_REASON_MSR, + value, ~value, 1, msr); +} + int hvm_memory_event_int3(unsigned long gla) { uint32_t pfec = PFEC_page_present; diff -r c4114a042410 -r 3450c4dfff7f xen/include/asm-x86/hvm/hvm.h --- a/xen/include/asm-x86/hvm/hvm.h Fri Dec 21 17:05:38 2012 +0000 +++ b/xen/include/asm-x86/hvm/hvm.h Thu Jan 03 12:05:13 2013 +0200 @@ -448,6 +448,7 @@ int hvm_x2apic_msr_write(struct vcpu *v, void hvm_memory...

I ran a bisect to find out when Windows XP 32 bit becomes unusably slow. And I found the changeset that caused it. ========== The problem: ========== Windows 8 64 bit and 32 bit run fast and fine in the newest xen versions. Windows XP 32 bit runs unusably slow in anything new that I built from xen-unstable, but runs fast in 4.1.2 and 4.1.3 stable. While it is running slow, "xm top" or

...hvm_memory_event_traps(current->domain->arch.hvm_domain + .params[HVM_PARAM_MEMORY_EVENT_MSR], + MEM_EVENT_REASON_MSR, + value, ~value, 1, msr); +} + int hvm_memory_event_int3(unsigned long gla) { uint32_t pfec = PFEC_page_present; diff -r b04de677de31 -r e33d3d37dfbf xen/include/asm-x86/hvm/hvm.h --- a/xen/include/asm-x86/hvm/hvm.h Tue Dec 18 18:16:52 2012 +0000 +++ b/xen/include/asm-x86/hvm/hvm.h Thu Dec 20 14:52:52 2012 +0200 @@ -448,6 +448,7 @@ int hvm_x2apic_msr_write(struct vcpu *v, void hvm_memory...

Hello everyone, this is the fourth version of the patch series that introduces ARMv7 with virtualization extensions support in Xen. The series allows Xen and Dom0 to boot on a Cortex-A15 based Versatile Express simulator. See the following announce email for more informations about what we are trying to achieve, as well as the original git history: See