kvm: introduce kvm_arch_msi_data_to_gsi

On ARM the MSI data corresponds to the shared peripheral interrupt (SPI)
ID. This latter equals to the SPI index + 32. to retrieve the SPI index,
matching the gsi, an architecture specific function is introduced.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 1da9ea8..8f7cee5 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -2410,3 +2410,8 @@ int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
 {
     return 0;
 }
+
+int kvm_arch_msi_data_to_gsi(uint32_t data)
+{
+    return data & 0xffff;
+}