search for: restore_all_xen

The self_nmi() code cause''s an NMI to be triggered by sending an APIC message to the local processor. However, NMIs are blocked by the VMEXIT, until the next iret or VMENTER. Volume 3 Chapter 27 Section 1 of the Intel SDM states: An NMI causes subsequent NMIs to be blocked, but only after the VM exit completes. As a result, as soon as the VMENTER happens, an immediate VMEXIT happens

...n this xen-devel list: >> http://lists.xensource.com/archives/html/xen-devel/2007-12/msg00678.html >> >> I was able to connect gdb but I ran into a problem where even >> after I clear all the breakpoints, execution traps into gdb with >> SIGTRAP at restore_all_xen(). This only happens if I set a >> breakpoint and then try to continue after hitting the break point. >> If I simply connect gdb but continue without setting any >> breakpoints, everything is OK. >> >> The post mentions some stability issues and...

I''m having trouble switching into user mode with my domU kernel -- everytime I call __HYPERVISOR_iret, the hypervisor calls into my kernel via the registered callback handler. None of the bits in the event channel pending arrays are set. If I return via the iret call, the hypervisor immediately calls back into the handler. The user RIP never changes, so it is clearly not making forward

Hi, Dan, This patch fixes strange behavior on IA64, that IDLE is scheduled more than Dom0 with default sEDF scheduler. The key point is reprogram_ac_timer at the end of ac_timer dispatcher, which programs local apic timer with expire of next ac_timer on x86. Higher precision lapic timer can trigger ac_timer more precisely than simply done in PIT interrupt handler. That works perfectly on x86

This set of patches converts the way frames gets created from using PUSHes/POPs to using MOVes, thus allowing (in certain cases) to avoid saving/restoring part of the register set. While the place where the (small) win from this comes from varies between CPUs, the net effect is a 1 to 2% reduction on a combined interruption entry and exit when the full state save can be avoided. 1: use MOV

...le_exception) movl UREGS_entry_vector(%rsp),%eax leaq exception_table(%rip),%rdx GET_CURRENT(%rbx) - PERFC_INCR(PERFC_exceptions, %rax) + PERFC_INCR(PERFC_exceptions, %rax, %rbx) callq *(%rdx,%rax,8) testb $3,UREGS_cs(%rsp) jz restore_all_xen Index: 2007-03-19/xen/common/multicall.c =================================================================== --- 2007-03-19.orig/xen/common/multicall.c 2007-03-27 10:31:15.000000000 +0200 +++ 2007-03-19/xen/common/multicall.c 2007-03-27 10:32:56.000000000 +0200 @@ -10,6 +10,7 @@ #include <xen/e...