Re: [PATCH v2 1/2] irqchip/gic-v3-its: Share ITS tables with a non-trusted hypervisor

[Catalin Marinas]

On Wed, Oct 02, 2024 at 03:16:29PM +0100, Steven Price wrote:
> Within a realm guest the ITS is emulated by the host. This means the
> allocations must have been made available to the host by a call to
> set_memory_decrypted(). Introduce an allocation function which performs
> this extra call.
> 
> For the ITT use a custom genpool-based allocator that calls
> set_memory_decrypted() for each page allocated, but then suballocates
> the size needed for each ITT. Note that there is no mechanism
> implemented to return pages from the genpool, but it is unlikely the
> peak number of devices will so much larger than the normal level - so
> this isn't expected to be an issue.
> 
> Co-developed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
> Tested-by: Will Deacon <will@xxxxxxxxxx>
> Reviewed-by: Marc Zyngier <maz@xxxxxxxxxx>
> Signed-off-by: Steven Price <steven.price@xxxxxxx>

Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>