• Suresh Warrier's avatar
    powerpc/powernv: Provide facilities for EOI, usable from real mode · 4ee11c1a
    Suresh Warrier authored
    This adds a new function pnv_opal_pci_msi_eoi() which does the part of
    end-of-interrupt (EOI) handling of an MSI which involves doing an
    OPAL call.  This function can be called in real mode.  This doesn't
    just export pnv_ioda2_msi_eoi() because that does a call to
    icp_native_eoi(), which does not work in real mode.
    
    This also adds a function, is_pnv_opal_msi(), which KVM can call to
    check whether an interrupt is one for which we should be calling
    pnv_opal_pci_msi_eoi() when we need to do an EOI.
    
    [paulus@ozlabs.org - split out the addition of pnv_opal_pci_msi_eoi()
     from Suresh's patch "KVM: PPC: Book3S HV: Handle passthrough
     interrupts in guest"; added is_pnv_opal_msi(); wrote description.]
    Signed-off-by: default avatarSuresh Warrier <warrier@linux.vnet.ibm.com>
    Signed-off-by: default avatarPaul Mackerras <paulus@ozlabs.org>
    4ee11c1a
pci-ioda.c 101 KB