This patch makes frontend drivers being shutdown when devices_shutdown()
is called and walks down the device tree. Most of it is handled by the
xenbus core, which got a new function for the bus->shutdown callback.
Signed-off-by: Gerd Hoffmann <kraxel@suse.de>
Driver changes: Make backend drivers check it when entering Closed
state, only unregister devices when the "online" node is either "0" or
not present. The later maintains backward compatibility.
Tools changes: Update "online" node when creating and hot-unplugging
devices.
Background: When kexec'ing a new kernel, the old kernel's frontend
driver will shutdown, but the backend device should *NOT* disappear
due to that, so the new kernel instance can reconnect.
Signed-off-by: Gerd Hoffmann <kraxel@suse.de>
This may allow guest kernels to be run outside ring 3 in future, and
also provides scope for optimisations today (e.g., using global bit on
user mappings).
Signed-off-by: Jun Nakajima <jun.nakajima@intel.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
This patch fixes some over-zealous code removal with the P==M
cleanup. Some of the P==M code was shared with the bare metal kernel.
Also cleaned up a couple places we should have used CONFIG_XEN.
From: Juan Quintela <quintela@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@hp.com>
This patch fixes the copy_from/to_guest problem.
As Akio reported, modularised netback causes dom0's down.
The following process is happened in gnttab_transfer()@
xen/common/grant_table.c:
gnttab_transfer()
=> steal_page()
=> assign_domain_page_cmpxchg_rel()
=> domain_page_flush()
=> domain_flush_vtlb_all() // all TLBs are flushed
...
=> __copy_to_guest_offset() // always fail to copy
The embedded netback module has no problem because it uses TR pinned
data. But modularised one is out of TR. So copy_from/to_guest issue
must be solved in order to modularise drivers.
Signed-off-by: Kouya SHIMURA <kouya@jp.fujitsu.com>
Split the bits of page.h which are needed by PV-on-HVM drivers out
into a separate header file, so that it's a bit easier to get the xenolinux
machine address functions when compiled against a native kernel.
Signed-off-by: Steven Smith <ssmith@xensource.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
This fixes a bug whereby foreign pages were freed by the unpin, which
then become owned by the local domain before it destroys its ptes.
It therefore (erroneously) detects the mappings as local and so
updates reference counts, leading to crashes.
Signed-off-by: Keir Fraser <keir@xensource.com>
Added in Kconfig.
On ia64, use ia64 sysdata instead of pcifront genuine one.
Fix a warning on xenbus.c
Signed-off-by: Tristan Gingold <tristan.gingold@bull.net>
paravirtualize vdso areabased on Kevin's pointout and Dan's Idea.
introduce hyperprivop HYPERPRIVOP_RSM_BE and HYPERPRIVOP_GET_PSR.
and paravirtualize vdso area using them.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
xc_ia64_linux_save.c and xc_ia64_linux_restore.c added.
vcpu context has more registers and states (eg: tr registers).
Per cpu irqs are deallocated when cpu is switched off.
#if/#endif added in reboot.c for ia64.
Signed-off-by: Tristan Gingold <tristan.gingold@bull.net>
Here is the original changelog:
[NET] gso: Fix up GSO packets with broken checksums
Certain subsystems in the stack (e.g., netfilter) can break the
partial
checksum on GSO packets. Until they're fixed, this patch allows
this to
work by recomputing the partial checksums through the GSO
mechanism.
Once they've all been converted to update the partial checksum
instead of
clearing it, this workaround can be removed.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Add a new hypercall: SET_SHARED_INFO_VA.
Cleanup of asm-xsi-offsets: do not define absolute address, use a new macro.
Cleanup of linux asm-offsets: use a macro for xen mapped regs.
xensetup.S: set the shared_info address (disabled if using compatibility).
privop.h: May redefined XSI_BASE (not yet enabled for compatibility).
Vocabulary coherence: use XMAPPEDREGS_ prefix.
Cleanup of xensystem.h
Signed-off-by: Tristan Gingold <tristan.gingold@bull.net>
All the relevent information are already exported with arch-ia64.h
Use linux asm-offsets.h to write xsi offsets defines.
Signed-off-by: Tristan Gingold <tristan.gingold@bull.net>
[Removed xen-mkbuildtree-post/-pre]
Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Thanks to Kevin for tracking down this problem. This is a temporary
solution until we come up with something better for ia64.
Signed-off-by: Alex Williamson <alex.williamson@hp.com>
sizeof of the mach2phys table default mapping. Use this in Linux to
dynamically adapt the mfn_to_pfn() routine to undelrying hypervisor.
Signed-off-by: Keir Fraser <keir@xensource.com>
