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2012-07-19msi/msix: added API to set MSI message address and dataAlexey Kardashevskiy1-0/+1
Added (msi|msix)_set_message() function for whoever might want to use them. Currently msi_notify()/msix_notify() write to these vectors to signal the guest about an interrupt so the correct values have to written there by the guest or QEMU. For example, POWER guest never initializes MSI/MSIX vectors, instead it uses RTAS hypercalls. So in order to support MSIX for virtio-pci on POWER we have to initialize MSI/MSIX message from QEMU. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-06-18msix: Switch msix_uninit to return voidAlex Williamson1-2/+2
It can't fail. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-06-18msix: Allow full specification of MSIX layoutAlex Williamson1-4/+6
Finally, complete the fully specified interface. msix_add_config() gets folded into msix_init() because we now have quite a few parameters to pass and rolling it in let's us error earlier, avoiding the ugly unwind exit path. msix_mmio_setup() also gets rolled in, just because it's redundant to rediscover offsets when we already have them for such a tiny function. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-06-18msix: Add simple BAR allocation MSIX setup functionsAlex Williamson1-0/+3
msi_init() takes over a BAR without really specifying or allowing specification of how it does so. Instead, let's split it into two interfaces, one fully specified, and one trivially easy. This implements the latter. msix_init_exclusive_bar() takes over allocating and filling a PCI BAR _exclusively_ for the use of MSIX. When used, the matching msi_uninit_exclusive_bar() should be used to tear it down. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-06-18msix: fix PCIDevice naming inconsistencyAlex Williamson1-2/+1
msix.h calls the PCIDevice * parameter "dev" almost everywhere except the msix_write_config declaration. Fix the inconsistency. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-06-18msix: drop unused msix_bar_size, require valid bar_sizeJan Kiszka1-2/+0
No user in sight for msix_bar_size. bar_size for all users is aligned, let's simply require this instead of trying to fix up invalid input. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-05-21msix: Add msix_nr_vectors_allocatedJan Kiszka1-0/+2
Analogously to msi_nr_vectors_allocated, add a service for MSI-X. Will be used by the virtio-pci layer. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-05-21msix: Introduce vector notifiersJan Kiszka1-0/+4
Vector notifiers shall be triggered by the MSI/MSI-X core whenever a relevant configuration change is programmed by the guest. In case of MSI-X, changes are reported when the effective mask (global && per-vector) alters its state. On unmask, the current vector configuration is included in the event report. This allows users - e.g. virtio-pci layer - to transfer this information to external MSI-X routing subsystems - like vhost + KVM in-kernel irqchip. This implementation only provides MSI-X support, but extension to MSI is feasible and will be provided later on when adding support for KVM PCI device assignment. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-01-19msi: Generalize msix_supported to msi_supportedJan Kiszka1-2/+0
Rename msix_supported to msi_supported and control MSI and MSI-X activation this way. That was likely to original intention for this flag, but MSI support came after MSI-X. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
2011-08-08msix: convert to memory APIAvi Kivity1-4/+2
The msix table is defined as a subregion, to allow for a BAR that mixes device specific regions with the msix table. Reviewed-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-12-01msix: add helper to unuse all msix entriesMichael S. Tsirkin1-0/+1
will be used by virtio on soft reset Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2009-11-09pci: introduce pcibus_t to represent pci bus address/size instead of uint32_tIsaku Yamahata1-1/+2
This patch is preliminary for 64 bit BAR support. Introduce dedicated type, pcibus_t, to represent pci bus address/size instead of uint32_t. Later this type will be changed to uint64_t. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-05qemu: clean up target page usage in msixMichael S. Tsirkin1-3/+2
Since cpu_register_phys_memory does not require size to be a multiple of target page size, simply make msix page size 0x1000. Do this in msix, reverting part of 5e520a7d500ec2569d22d80f9ef4272a34cb3c80, as we no longer have to pass target page around. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-01Revert "Get rid of _t suffix"Anthony Liguori1-1/+1
In the very least, a change like this requires discussion on the list. The naming convention is goofy and it causes a massive merge problem. Something like this _must_ be presented on the list first so people can provide input and cope with it. This reverts commit 99a0949b720a0936da2052cb9a46db04ffc6db29. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-01Get rid of _t suffixmalc1-1/+1
Some not so obvious bits, slirp and Xen were left alone for the time being. Signed-off-by: malc <av1474@comtv.ru>
2009-09-20Compile msix only onceBlue Swirl1-2/+3
Get page size in device init. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-06-24qemu/pci: MSI-X support functionsMichael S. Tsirkin1-0/+34
Add functions implementing MSI-X support. First user will be virtio-pci. Note that platform must set a flag to declare MSI supported: this is a safety measure to avoid breaking platforms which should support MSI-X but currently lack this in the interrupt controller emulation. For PC this will be set by APIC. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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