[0/2] irqchip/gic-v3-its: Mark ITS tables as decrypted

Message

Steven Price Sept. 5, 2024, 9:17 a.m. UTC

These two patches are taken from the larger series to support running
Linux as a realm guest in CCA[1]. They add support to the GIC for
allocating the ITS pages such that they are decrypted so that the host
can access then for emulation purposes.

Note that there are likely to be future changes to make this more
configurable in the future, as it's possible that in a future
configuration a protected component within the realm could take on the
emulation responsibilities ('Planes support')[2]. But this is a good
building block for the future.

Sorry for the delay in posting this as a separate series!

[1] https://lore.kernel.org/r/20240819131924.372366-1-steven.price%40arm.com
[2] https://lore.kernel.org/r/beff9162-e1ba-4f72-91ea-329eaed48dbc%40arm.com

Steven Price (2):
  irqchip/gic-v3-its: Share ITS tables with a non-trusted hypervisor
  irqchip/gic-v3-its: Rely on genpool alignment

 drivers/irqchip/irq-gic-v3-its.c | 142 +++++++++++++++++++++++++------
 1 file changed, 117 insertions(+), 25 deletions(-)