Use non-trivial dma_{un,}map_page only when CONFIG_HIGHMEM, allowing
to not compile swiotlb_{un,}map_page in that case, which in neither
case need exporting.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Use address width needed by device rather than dma_bits in
dma_alloc_coherent().
Probe supported address width in swiotlb initialization.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
While, as discussed, the performance impact of this option is
certainly higher than on native Linux, the option should not be
entirely disallowed if people want to sacrifice performance for less
lowmem pressure.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
PUDs,PMDs,PTEs are all marked as ForeignPage so that they can be
grabbed from tlb_remove_page() at the appropriate time and freed in a
special way.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
This causes the kernel to use a polling loop rather than hypercall
down to block. I have found this useful to profile the amount of sleep
cycles when using xenoprof, there may be other uses.
Signed-off-by: Amitabha Roy <amitabha.roy@gmail.com>
The recent change to use a default DMA bit width of 30 bits (required
by chips like the b44) only converted the streaming DMA primitives.
The coherent mappings are still hard-coded to 31 bits. This means
that b44 still doesn't work under Xen.
This patch makes the io_tlb_dma_bits variable global and uses it for
coherent memory mappings.
Thanks to Calvin Webster for providing a machine with a b44 and 2G
of memory I've been able to verify that this finally makes the b44
work under Xen.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Rename 'io_tlb_dma_bits' to the more correct 'dma_bits'. This also
affects the name of the boot parameter, which is now 'dma_bits='.
Signed-off-by: Keir Fraser <keir@xensource.com>
Since we had changed to use event callback to deliver interrupts,
1. The pending_interruption is changed to pending_event.
2. get_ivr, set_tpr, get_trp and set_eoi are not used or only used
in the initialization phase. There is no need to write this code
in assembly. This code is deleted.
3. hyper_ssm_i needs to be rewritten to jump to entchn_callback_handler
instead of iva+0x3000 interrupt handler. I will do this later.
Signed-off-by: Anthony Xu <anthony.xu@intel.com>
Rename xen_machine_kexec() to just machine_kexec() and only compile in
the Xen or native version as appropriate.
Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
x86 foreign HVM domain page mapping semantic was changed to use gmfn
instead mfn. It applies to domains with auto_translated_mode enabled,
and all ia64 domains enable auto_translated_mode. This patch changes
ia64 foreign domain page mapping to use gmfn and fixes ia64 domU buidler.
However this patch breaks domain save/restore/dump-core.
They should also be fixed-up
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
required if CONFIG_VT is enabled but the domain isn't currently
configured to use the PV framebuffer. Put it back in, in a slightly
more palatable form.
Signed-off-by: Steven Smith <sos22@cam.ac.uk>
extensively hacked based on feedback from xen-devel.
Its architecture is comparable to the common split device driver
architecture: xenfb and xenkbd modules serve as frontend in domU, and
the user space vncfb or sdlfb process serves as backend in dom0.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Compile xenoprof perfmon related hypercall even when
CONFIG_PERFMON, CONFIG_OPROFILE, CONFIG_OPROFILE_MODULE are disabled.
They should be compiled in vmlinux unconditionally because they
might be called by other modules in theory.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
This patch contains the x86_64 implementation of Kexec / Kdump for Xen.
Signed-Off-By: Magnus Damm <magnus@valinux.co.jp>
Signed-Off-By: Simon Horman <horms@verge.net.au>
This patch contains the x86_32 implementation of Kexec / Kdump for Xen.
Signed-Off-By: Magnus Damm <magnus@valinux.co.jp>
Signed-Off-By: Simon Horman <horms@verge.net.au>
After being offline for a long time, the softlockup watchdog triggers
a BUG() on our faces. This is expected, as in fact, we spent more than
a fixed 10*HZ amount of time without touching the watchdog.
However, by inspecting the contents of stolen inside timer irq handler,
we can gain awareness of the fact, and do better than that.
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
1. Balloon driver does not need to set M2P entry.
This is done by the populate_physmap hypercall.
2. Xen now translates foreign mappings from GMFN->MFN.
Tools are simplified because of this.
Signed-off-by: Keir Fraser <keir@xensource.com>
If audit is enabled or the child process is ptraced,
non-paravirtualized code path is executed.
Thus paravirtualized ifs is left unmodifed so that the child process
crashes after clone2().
paravirtualize ia64_ret_from_clone() to fix it.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
buffer support and auto translated mode support.
renamed xenoprof_get_buffer::buf_maddr, xenoprof_passive::buf_maddr to
xenoprof_get_buffer::buf_gmaddr, xenoprof_passive::buf_gmaddr
to support auto translated mode. With auto translated mode enabled,
it is gmaddr, not maddr.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Simplify the share function.
Signed-off-by: Keir Fraser <keir@xensource.com>
settings in config.h.
Set the upper limit for DMADOM and swiotlb allocations to be 30 bits
(1G) instead of 31 bits, to allow the b44 NIC driver to work.
Signed-off-by: Stephen Tweedie <sct@redhat.com>
This requires us to explicitly specify _PAGE_USER for kernel mappings.
Original patch by Jan Beulich <jbeulich@novell.com> and Gerd Hoffmann.
Signed-off-by: Keir Fraser <keir@xensource.com>
