On 15/02/2023 11:27 am, Jan Beulich wrote:
> Both the 4Gb-segments and the PAE-extended-CR3 one are applicable to
> 32-bit guests only. The PAE-extended-CR3 use, furthermore, was redundant
> with the PAE_MODE ELF note anyway.
>
> Signed-off-by: Jan Beulich <jbeul...@suse.com>
>
> --- a/arch/x86/xen/setup.c
> +++ b/arch/x86/xen/setup.c
> @@ -934,12 +934,8 @@ void xen_enable_syscall(void)
>
> static void __init xen_pvmmu_arch_setup(void)
> {
> - HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments);
> HYPERVISOR_vm_assist(VMASST_CMD_enable,
> VMASST_TYPE_writable_pagetables);
I find it disappointing that a PV guest which states a hard dependency
on writeable pagetables in its elfnotes doesn't have this activated
automatically.
The PV API/ABI truly is an undesigned mess.
~Andrew
