aboutsummaryrefslogtreecommitdiff
path: root/default-configs
diff options
context:
space:
mode:
authorDavid Gibson <david@gibson.dropbear.id.au>2013-09-26 16:18:44 +1000
committerAlexander Graf <agraf@suse.de>2013-10-25 23:25:47 +0200
commit11ad93f68195f68cc94d988f2aa50b4d190ee52a (patch)
tree593486548707d61657eb62f024395fc55fddbdde /default-configs
parent5eb92ccc3f23f958c0d21bed7c22abe6c1f1adda (diff)
downloadqemu-arm-11ad93f68195f68cc94d988f2aa50b4d190ee52a.tar.gz
xics-kvm: Support for in-kernel XICS interrupt controller
Recent (host) kernels support emulating the PAPR defined "XICS" interrupt controller system within KVM. This patch allows qemu to initialize and configure the in-kernel XICS, and keep its state in sync with qemu's XICS state as necessary. This should give considerable performance improvements. e.g. on a simple IPI ping-pong test between hardware threads, using qemu XICS gives us around 5,000 irqs/second, whereas the in-kernel XICS gives us around 70,000 irqs/s on the same hardware configuration. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> [Mike Qiu <qiudayu@linux.vnet.ibm.com>: fixed mistype which caused ics_set_kvm_state() to fail] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'default-configs')
-rw-r--r--default-configs/ppc64-softmmu.mak1
1 files changed, 1 insertions, 0 deletions
diff --git a/default-configs/ppc64-softmmu.mak b/default-configs/ppc64-softmmu.mak
index 975112acf7..fb34a9b074 100644
--- a/default-configs/ppc64-softmmu.mak
+++ b/default-configs/ppc64-softmmu.mak
@@ -46,6 +46,7 @@ CONFIG_E500=y
CONFIG_OPENPIC_KVM=$(and $(CONFIG_E500),$(CONFIG_KVM))
# For pSeries
CONFIG_XICS=$(CONFIG_PSERIES)
+CONFIG_XICS_KVM=$(and $(CONFIG_PSERIES),$(CONFIG_KVM))
# For PReP
CONFIG_I82378=y
CONFIG_I8259=y