Re: [RFC XEN PATCH] x86/cpuid: Expose max_vcpus field in HVM hypervisor leaf

2024-07-16 Thread Jan Beulich
On 16.07.2024 17:03, Matthew Barnes wrote: > On Tue, Jul 09, 2024 at 08:40:18AM +0200, Jan Beulich wrote: >> On 08.07.2024 17:42, Matthew Barnes wrote: >>> Currently, OVMF is hard-coded to set up a maximum of 64 vCPUs on >>> startup. >>> >>> There are efforts to support a maximum of 128 vCPUs, whic

Re: [RFC XEN PATCH] x86/cpuid: Expose max_vcpus field in HVM hypervisor leaf

2024-07-16 Thread Matthew Barnes
On Tue, Jul 09, 2024 at 08:40:18AM +0200, Jan Beulich wrote: > On 08.07.2024 17:42, Matthew Barnes wrote: > > Currently, OVMF is hard-coded to set up a maximum of 64 vCPUs on > > startup. > > > > There are efforts to support a maximum of 128 vCPUs, which would involve > > bumping the OVMF constant

Re: [RFC XEN PATCH] x86/cpuid: Expose max_vcpus field in HVM hypervisor leaf

2024-07-09 Thread Jan Beulich
On 09.07.2024 13:11, Alejandro Vallejo wrote: > I'll pitch in, seeing as I created the GitLab ticket. > > On Tue Jul 9, 2024 at 7:40 AM BST, Jan Beulich wrote: >> On 08.07.2024 17:42, Matthew Barnes wrote: >>> Currently, OVMF is hard-coded to set up a maximum of 64 vCPUs on >>> startup. >>> >>> Th

Re: [RFC XEN PATCH] x86/cpuid: Expose max_vcpus field in HVM hypervisor leaf

2024-07-09 Thread Alejandro Vallejo
I'll pitch in, seeing as I created the GitLab ticket. On Tue Jul 9, 2024 at 7:40 AM BST, Jan Beulich wrote: > On 08.07.2024 17:42, Matthew Barnes wrote: > > Currently, OVMF is hard-coded to set up a maximum of 64 vCPUs on > > startup. > > > > There are efforts to support a maximum of 128 vCPUs, w

Re: [RFC XEN PATCH] x86/cpuid: Expose max_vcpus field in HVM hypervisor leaf

2024-07-08 Thread Jan Beulich
On 08.07.2024 17:42, Matthew Barnes wrote: > Currently, OVMF is hard-coded to set up a maximum of 64 vCPUs on > startup. > > There are efforts to support a maximum of 128 vCPUs, which would involve > bumping the OVMF constant from 64 to 128. > > However, it would be more future-proof for OVMF to

[RFC XEN PATCH] x86/cpuid: Expose max_vcpus field in HVM hypervisor leaf

2024-07-08 Thread Matthew Barnes
Currently, OVMF is hard-coded to set up a maximum of 64 vCPUs on startup. There are efforts to support a maximum of 128 vCPUs, which would involve bumping the OVMF constant from 64 to 128. However, it would be more future-proof for OVMF to access the maximum number of vCPUs for a domain and set i