On 26/04/2025 12:43 am, Ariadne Conill wrote:
> diff --git a/xen/arch/x86/guest/hyperv/hyperv.c
> b/xen/arch/x86/guest/hyperv/hyperv.c
> index 6989af38f1..0305374a06 100644
> --- a/xen/arch/x86/guest/hyperv/hyperv.c
> +++ b/xen/arch/x86/guest/hyperv/hyperv.c
> @@ -98,7 +98,13 @@ static void __init setup_hypercall_page(void)
> rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
> if ( !hypercall_msr.enable )
> {
> - mfn = HV_HCALL_MFN;
> + void *hcall_page = alloc_xenheap_page();
> + if ( !hcall_page )
> + panic("Hyper-V: Failed to allocate hypercall trampoline page");
\n
~Andrew
