search for: hypercall_vector

...xen architecture allows only DomU kernel to raise a hypercall. I am planning to enable application to communicate with xen directly. I am assuming, setting up a trap gate with Ring-3 access should do the trick. I have few questions regarding this. Is my idea feasible? ==> ( _set_gate(idt_table+HYPERCALL_VECTOR, 15, 3, &hypercall); ) Are there any security/performance/functional implications with this approach? Thanks and regards, SDK. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

...mask, MOVE_CLEANUP_VECTOR); cfg->move_in_progress = 0; } diff -r 0268e7380953 -r c7884dbb6f7d xen/arch/x86/irq.c --- a/xen/arch/x86/irq.c Mon Sep 05 15:10:28 2011 +0100 +++ b/xen/arch/x86/irq.c Wed Sep 07 16:00:55 2011 +0100 @@ -338,7 +338,7 @@ int __init init_irq_data(void) set_bit(HYPERCALL_VECTOR, used_vectors); /* IRQ_MOVE_CLEANUP_VECTOR used for clean up vectors */ - set_bit(IRQ_MOVE_CLEANUP_VECTOR, used_vectors); + set_bit(MOVE_CLEANUP_VECTOR, used_vectors); return 0; } diff -r 0268e7380953 -r c7884dbb6f7d xen/arch/x86/smpboot.c --- a/xen/arch/x86/smpboot.c Mon S...

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