module has a tri-state configuration so it can be a loadable module.
Views the hypervisor as hardware device, uses sysfs as a scripting
interface for user space tools that need these attributes.
Some user space apps, particularly for systems management, need to
know if their kernel is running in a virtual machine and if so in
what type of virtual machine. This property is contained in the
file /sys/hypervisor/type.
The file hypervisor_sysfs.c creates a generic hypervisor subsystem
that can be linked to by any hypervisor. The file xen_sysfs.c exports
the xen-specific attributes.
Signed-off-by: Mike D. Day <ncmike@us.ibm.com>
legacy hypercall in that it takes a pointer to a block of extra arguments
rather than an opaque unsigned long. The old hypercall still exists, for
backwards compatibility.
The new hypercall supports new sub-command SCHEDOP_poll, which can be used to
wait on a set of event-channel ports with an optional timeout. This is exported
in XenLinux as HYPERVISOR_poll, and used in the pcifront driver to wait on a
response from the pciback driver.
Can also be used for debuggers. :-)
Signed-off-by: Keir Fraser <keir@xensource.com>
Signed-off-by: John Levon <john.levon@sun.com>
the low half before the high half. Otherwise the compiler may reorder the writes
and validation in Xen will fail.
From: Jan Beulich
Signed-off-by: Keir Fraser <keir@xensource.com>
Instead of putting the page outside of the guests pseudo-physical address
space, we put it next to the other pages filled by the domain builder,
such that the page is already mapped in the initial pagetables and/or a
lowmem-type memory mapping.
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
at the local end of the xenbus connection (i.e. that value that is passed
through xenbus_switch_state). This means that xenbus_probe can wait for all
the boot devices to become ready without having to hurt the store.
Also, fix this probing -- previously, the wrong value was being returned by
all_devices_ready_, so this polling would only have waited for one device.
Signed-off-by: Ewan Mellor <ewan@xensource.com>
- machine_specific_memory_setup() was unused on x86-64
- machine_specific_modify_cpu_capabilities() must not be __init (for CPU hotplug)
- machine_specific_modify_cpu_capabilities() should be called in similar ways on 32- and 64-bits
From: Jan Beulich <JBeulich@novell.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Add comments in public header version.h to explain what all the different
feature flags mean. Add a new flag XENFEAT_pae_pgdir_above_4gb to inform the guest
that its PAE page directories do not need to conform to the usual hardware
restriction.
Signed-off-by: Keir Fraser <keir@xensource.com>
To support this we give kernel GDT entries DPL=0 and use kernel
segment selectors with RPL=0. Xen will crunch these to ring 1 when
they are passed in. When a segment selector is used directly or placed
in a stack frame the guest OS is reponsible for crunching the RPL.
Signed-off-by: Ian Campbell <Ian.Campbell@XenSource.com>
As a consequence, some of the i386 changes over native code need to also be
added to x86-64.
From: Jan Beulich <JBeulich@novell.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Add CONFIG_X86_NO_IDT to exclude all code which references the idt table.
Also fix the non-Xen cpu_gdt_init() handling.
From: Jan Beulich <JBeulich@novell.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
and consumes 25% of the per-cpu area.
Add CONFIG_X86_NO_TSS to exclude all code which references tss.
Based on a patch by Jan Beulich <JBeulich@novell.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
and consumes 25% of the per-cpu area.
Add CONFIG_X86_NO_TSS to exclude all code which references tss.
Add CONFIG_X86_SYSENTER to conditionally include support for sysenter.
Change CONFIG_DOUBLEFAULT to depend on !CONFIG_X86_NO_TSS.
(sysenter and doublefault need tss).
Based on a patch by Jan Beulich <JBeulich@novell.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Protect the calls to the switch_APIC_timer_to_ipi and
switch_ipi_to_APIC_timer functions since we don't implement
smp_send_timer_broadcast_ipi().
From: Jan Beulich <JBeulich@novell.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
