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Re: [Xen-devel] [RFC PATCH 01/24] ARM: GICv3 ITS: parse and store ITS subnodes from hardware DT
Hi Andre,
On 28/09/2016 19:24, Andre Przywara wrote:
Parse the DT GIC subnodes to find every ITS MSI controller the hardware
offers. Store that information in a list to both propagate all of them
later to Dom0, but also to be able to iterate over all ITSes.
This introduces an ITS Kconfig option.
Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
---
xen/arch/arm/Kconfig | 5 ++++
xen/arch/arm/Makefile | 1 +
xen/arch/arm/gic-its.c | 67 +++++++++++++++++++++++++++++++++++++++++++
xen/arch/arm/gic-v3.c | 6 ++++
xen/include/asm-arm/gic-its.h | 57 ++++++++++++++++++++++++++++++++++++
5 files changed, 136 insertions(+)
create mode 100644 xen/arch/arm/gic-its.c
create mode 100644 xen/include/asm-arm/gic-its.h
diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
index 797c91f..9fe3b8e 100644
--- a/xen/arch/arm/Kconfig
+++ b/xen/arch/arm/Kconfig
@@ -45,6 +45,11 @@ config ACPI
config HAS_GICV3
bool
+config HAS_ITS
+ bool "GICv3 ITS MSI controller support"
+ depends on ARM_64
HAS_GICV3 will only be selected for 64-bit. It would need some rework to
be supported on 32-bit. So I would drop this dependency.
+ depends on HAS_GICV3
+
I am not convinced that we should (currently) let the user selecting the
ITS support. It increases the test coverage (we have to test with and
without). Do we expect people using GICv3 without ITS?
Regards,
--
Julien Grall
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