Re: [PATCH 1/6] KVM: arm64: Add __gmem_abort and __user_mem_abort

Hi Jack,

On Thu, Sep 11, 2025 at 02:46:43PM +0100, Jack Thomson wrote:

From: Jack Thomson jackabt@amazon.com

Adding __gmem_abort and __user_mem_abort that preserve -EAGAIN results. These will be used by the pre-fault implementation which needs to retry on -EAGAIN.

-EAGAIN is a pretty clear signal that another vCPU has faulted on this memory and is in the middle of installing a mapping. Why bother with retrying?

If we conceptually treat this thing as a synthetic stage-2 abort then it should use the same EAGAIN handling as a literal stage-2 abort.

Thanks, Oliver