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The emacs variable to set the C style from a local variable block is
c-file-style, not c-set-style.
Signed-off-by: David Vrabel <david.vrabel@citrix.com
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Performance is not an issue with printk(), so let the function do
minimally more work and instead save a byte per affected format
specifier.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
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Introduce clear_user for x86 and ia64, shamelessly taken from Linux.
The x86 version is the 32 bit clear_user implementation. Introduce
clear_guest for x86 and ia64. The x86 implementation is based on
clear_user and a new clear_user_hvm function. The ia64 implementation
is actually in xencomm and it is based on xencomm_copy_to_guest.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Jan Beulich <JBeulich@suse.com>
Committed-by: Keir Fraser <keir@xen.org>
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Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
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by some users. Introduce get_page_owner_and_reference() where that can
be more useful.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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Signed-off-by: Kouya Shimura <kouya@jp.fujitsu.com>
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Signed-off-by: Kouya Shimura <kouya@jp.fujitsu.com>
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Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
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Signed-off-by: Keir Fraser <keir@xensource.com>
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Current implementation doesn't allow struct xencomm_desc::address
array to be more than single page. On IA64 it causes 64GB+ domain
creation failure. This patch generalizes xencomm to allow multipage
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
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- Xencomm should check struct xencomm_desc alignment.
- Xencomm should check whether struct xencomm_desc itself (8 bytes)
doesn't cross page boundary. Otherwise a hostile guest kernel can
pass such a pointer that may across page boundary. Then xencomm
accesses an unrelated page.
- Xencomm shouldn't access struct xencomm_desc::nr_addrs multiple
times. Copy it to local area and use the copy.
Otherwise a hostile guest can modify at the same time.
- Xencomm should check whether struct xencomm_desc::address[] array
crosses page boundary. Otherwise xencomm may access unrelated pages.
- Xencomm should get_page()/put_page() after address conversion from
paddr to maddr because xen supports SMP and balloon driver.
Otherwise another vcpu may free the page at the same time.
Such a domain behaviour doesn't make sense, however nothing prevents
it.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
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Signed-off-by: Keir Fraser <keir@xensource.com>
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Xen/powerpc runs in real mode so that it uses maddr interchangably
with vaddr. But it isn't the case in xen/ia64. It is necessary to
convert maddr to vaddr to access the page. maddr_to_virt() doesn't
convert on powerpc, so it should work on both archtechture.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
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- fix return address of xencomm_copy_to_guest()
- fix xencomm_add_offset()
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
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It should not call paddr_to_maddr() with invalid address.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
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It's a long story, but basically a small divergence in xenppc-unstable meant a
large number of changesets couldn't be directly imported to xen-unstable, so
this changeset includes all of them.
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
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