On 07/04/17 14:46, Andre Przywara wrote:
Hi,
On 07/04/17 14:41, Julien Grall wrote:
Hi Andre,
On 06/04/17 00:19, Andre Przywara wrote:
Dom0 expects all ITSes in the system to be propagated to be able to
use MSIs.
Create Dom0 DT nodes for each hardware ITS, keeping the register frame
address the same, as the doorbell address that the Dom0 drivers program
into the BARs has to match the hardware.
Signed-off-by: Andre Przywara <andre.przyw...@arm.com>
---
xen/arch/arm/gic-v3-its.c | 78
++++++++++++++++++++++++++++++++++++++++
xen/arch/arm/gic-v3.c | 4 ++-
xen/include/asm-arm/gic_v3_its.h | 13 +++++++
3 files changed, 94 insertions(+), 1 deletion(-)
diff --git a/xen/arch/arm/gic-v3-its.c b/xen/arch/arm/gic-v3-its.c
index a57e63a..a167471 100644
--- a/xen/arch/arm/gic-v3-its.c
+++ b/xen/arch/arm/gic-v3-its.c
@@ -20,6 +20,7 @@
#include <xen/lib.h>
#include <xen/delay.h>
+#include <xen/libfdt/libfdt.h>
#include <xen/mm.h>
#include <xen/rbtree.h>
#include <xen/sched.h>
@@ -875,6 +876,83 @@ int gicv3_lpi_change_vcpu(struct domain *d,
paddr_t vdoorbell,
return 0;
}
+/*
+ * Create the respective guest DT nodes for a list of host ITSes.
+ * This copies the reg property, so the guest sees the ITS at the
same address
+ * as the host.
+ * Giving NULL for the its_list will make it use the list of host ITSes.
+ */
+int gicv3_its_make_dt_nodes(struct list_head *its_list,
Why do you have this parameter its_list that you always set to NULL?
The idea is to later allow only a subset of ITSes to be mapped into a
guest. In this case this function would be called with a specific
version of the list.
So this feature is basically just in for future DomU support.
DomU DTS are created by the toolstack and not Xen. So please drop this
pointless variable.
Cheers,
--
Julien Grall
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