On 02.07.2012, at 09:24, Jan Kiszka wrote:
> On 2012-07-02 06:28, Alexey Kardashevskiy wrote:
>> Ping?
>>
>>
>> On 22/06/12 11:15, Alexey Kardashevskiy wrote:
>>> 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@xxxxxxxxx>
>>> ---
>>> hw/msi.c | 13 +++++++++++++
>>> hw/msi.h | 1 +
>>> hw/msix.c | 9 +++++++++
>>> hw/msix.h | 2 ++
>>> 4 files changed, 25 insertions(+)
>>>
>>> diff --git a/hw/msi.c b/hw/msi.c
>>> index 5233204..cc6102f 100644
>>> --- a/hw/msi.c
>>> +++ b/hw/msi.c
>>> @@ -105,6 +105,19 @@ static inline uint8_t msi_pending_off(const PCIDevice* dev, bool msi64bit)
>>> return dev->msi_cap + (msi64bit ? PCI_MSI_PENDING_64 : PCI_MSI_PENDING_32);
>>> }
>>>
>>> +void msi_set_message(PCIDevice *dev, MSIMessage msg)
>>> +{
>>> + uint16_t flags = pci_get_word(dev->config + msi_flags_off(dev));
>>> + bool msi64bit = flags & PCI_MSI_FLAGS_64BIT;
>>> +
>>> + if (msi64bit) {
>>> + pci_set_quad(dev->config + msi_address_lo_off(dev), msg.address);
>>> + } else {
>>> + pci_set_long(dev->config + msi_address_lo_off(dev), msg.address);
>>> + }
>>> + pci_set_word(dev->config + msi_data_off(dev, msi64bit), msg.data);
>>> +}
>>> +
>>> bool msi_enabled(const PCIDevice *dev)
>>> {
>>> return msi_present(dev) &&
>>> diff --git a/hw/msi.h b/hw/msi.h
>>> index 75747ab..6ec1f99 100644
>>> --- a/hw/msi.h
>>> +++ b/hw/msi.h
>>> @@ -31,6 +31,7 @@ struct MSIMessage {
>>>
>>> extern bool msi_supported;
>>>
>>> +void msi_set_message(PCIDevice *dev, MSIMessage msg);
>>> bool msi_enabled(const PCIDevice *dev);
>>> int msi_init(struct PCIDevice *dev, uint8_t offset,
>>> unsigned int nr_vectors, bool msi64bit, bool msi_per_vector_mask);
>>> diff --git a/hw/msix.c b/hw/msix.c
>>> index ded3c55..5f7d6d3 100644
>>> --- a/hw/msix.c
>>> +++ b/hw/msix.c
>>> @@ -45,6 +45,15 @@ static MSIMessage msix_get_message(PCIDevice *dev, unsigned vector)
>>> return msg;
>>> }
>>>
>>> +void msix_set_message(PCIDevice *dev, int vector, struct MSIMessage msg)
>>> +{
>>> + uint8_t *table_entry = dev->msix_table_page + vector * PCI_MSIX_ENTRY_SIZE;
>>> +
>>> + pci_set_quad(table_entry + PCI_MSIX_ENTRY_LOWER_ADDR, msg.address);
>>> + pci_set_long(table_entry + PCI_MSIX_ENTRY_DATA, msg.data);
>>> + table_entry[PCI_MSIX_ENTRY_VECTOR_CTRL] &= ~PCI_MSIX_ENTRY_CTRL_MASKBIT;
>>> +}
>>> +
>>> /* Add MSI-X capability to the config space for the device. */
>>> /* Given a bar and its size, add MSI-X table on top of it
>>> * and fill MSI-X capability in the config space.
>>> diff --git a/hw/msix.h b/hw/msix.h
>>> index 50aee82..26a437e 100644
>>> --- a/hw/msix.h
>>> +++ b/hw/msix.h
>>> @@ -4,6 +4,8 @@
>>> #include "qemu-common.h"
>>> #include "pci.h"
>>>
>>> +void msix_set_message(PCIDevice *dev, int vector, MSIMessage msg);
>>> +
>>> int msix_init(PCIDevice *pdev, unsigned short nentries,
>>> MemoryRegion *bar,
>>> unsigned bar_nr, unsigned bar_size);
>>
>>
>
> Acked-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
So I take it that you expect this patch to go through my tree, not yours?
Alex
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