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From: Joerg Roedel <jroedel at suse.de> Add a play_dead handler when running under SEV-ES. This is needed because the hypervisor can't deliver an SIPI request to restart the AP. Instead the kernel has to issue a VMGEXIT to halt the VCPU. When the hypervisor would deliver and SIPI is wakes up the VCPU instead. Signed-off-by: Joerg Roedel <jroedel at suse.de> ---

...e > would need to fire up a kernel thread which periodically calls > fence->signaled. We actually have seen similar fun on some i915 platforms. I wonder whether we shouldn't have something in the fence core for this given how common it is. Currently we have the same trick with regular wakups on platforms with unreliable interrupts, but I haven't yet looked at how we'll do this with callbacks once we add the scheduler and fences. It might be though that we've finally fixed these coherency issues between the interrupt and the fence write for real. -Daniel -- Daniel Vetter So...

> Maybe I've mixed things up a bit in my description. There is > fence_signal which the implementor/exporter of a fence must call when > the fence is completed. If the exporter has an ->enable_signaling > callback it can delay that call to fence_signal for as long as it > wishes as long as enable_signaling isn't called yet. But that's just > the optimization to not

Hi, here is the next version of changes to enable Linux to run as an SEV-ES guest. The code was rebased to v5.7-rc3 and got a fair number of changes since the last version. What is SEV-ES ============== SEV-ES is an acronym for 'Secure Encrypted Virtualization - Encrypted State' and means a hardware feature of AMD processors which hides the register state of VCPUs to the hypervisor by

Hi, here is the next version of changes to enable Linux to run as an SEV-ES guest. The code was rebased to v5.7-rc3 and got a fair number of changes since the last version. What is SEV-ES ============== SEV-ES is an acronym for 'Secure Encrypted Virtualization - Encrypted State' and means a hardware feature of AMD processors which hides the register state of VCPUs to the hypervisor by

Hi, here is the first public post of the patch-set to enable Linux to run under SEV-ES enabled hypervisors. The code is mostly feature-complete, but there are still a couple of bugs to fix. Nevertheless, given the size of the patch-set, I think it is about time to ask for initial feedback of the changes that come with it. To better understand the code here is a quick explanation of SEV-ES first.

Hi, here is the first public post of the patch-set to enable Linux to run under SEV-ES enabled hypervisors. The code is mostly feature-complete, but there are still a couple of bugs to fix. Nevertheless, given the size of the patch-set, I think it is about time to ask for initial feedback of the changes that come with it. To better understand the code here is a quick explanation of SEV-ES first.