It turns out that I wasn’t switching control to the primary VM, by clearing the buffer first. This problem has been resolved.

On Mon, Jan 3, 2022 at 06:04 Olivier Deprez Olivier.Deprez@arm.com wrote:

Hi Friedrich,

Can you tell more about your test setup and conditions (model name if used, trees/branches, build command line, etc.)? If I read correctly, you're using Hafnium as an hypervisor (aka not the secure world SPMC)? And you're attempting to send an indirect message from the (normal world) PVM to a (normal world) secondary VM? There is a fair amount of test cases exercising this scenario, did you start from such test case for your experiment?

Regards, Olivier.

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From: Hafnium hafnium-bounces@lists.trustedfirmware.org on behalf of Friedrich via Hafnium hafnium@lists.trustedfirmware.org Sent: 23 December 2021 22:32 To: Hafnium@lists.trustedfirmware.org Subject: [Hafnium] ffa_msg_send from Linux Primary to Secondary Fails

Hi,

Can someone help me figure this out? I am trying to send a message from my Linux primary VM to a secondary VM, but for some reason ffa_msg_send keeps on failing and I keep getting an EAGAIN error: resource temporarily unavailable.

Any suggestions?

Best, Friedrich -- Hafnium mailing list Hafnium@lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/hafnium