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Keir: When thinking more about IO_APIC virtualization in Itanium, I got a confuse: How is io_apic.c used in xenlinux (X86)? It looks like all the machine resource of io_apic is handled in xen (xen/arch/x86/irq.c), and the PIRQ based on event channel can be handled by pirq_type in linux/arch/xen/kernel/evtchn.c pretty well? Then what is the function of file io_apic.c? thx,eddie _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

...= 1; irq_desc[i].chip = &dynirq_type; @@ -1196,6 +1105,8 @@ void __init xen_init_IRQ(void) #endif irq_desc[i].status = IRQ_DISABLED; + if (!identity_mapped_irq(i)) + irq_desc[i].status |= IRQ_NOPROBE; irq_desc[i].action = NULL; irq_desc[i].depth = 1; irq_desc[i].chip = &pirq_type; _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

The following 5 patches are re-submissions of the vt-d patch. This set of patches has been tested against cs# 15080 and is now much more mature and tested against more environments than the original patch. Specifically, we have successfully tested the patch with following environements: - 32/64-bit Linux HVM guest - 32-bit Windows XP/Vista (64-bit should work but did not test) -

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths