> For Linux, running in Hyper-V VTL (Virtual Trust Level), kernel in VTL2 > tries to access VTL0 low memory in probe_roms. This memory is not > described in the e820 map. Initialize probe_roms call to no-ops > during boot for VTL2 kernel to avoid this. The issue got identified > in OpenVMM which detects invalid accesses initiated from kernel running > in VTL2. > > Co-developed-by: Saurabh Sengar <ssengar@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Saurabh Sengar <ssengar@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Naman Jain <namjain@xxxxxxxxxxxxxxxxxxx> > --- > arch/x86/hyperv/hv_vtl.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/x86/hyperv/hv_vtl.c b/arch/x86/hyperv/hv_vtl.c > index 4e1b1e3b5658..3f4e20d7b724 100644 > --- a/arch/x86/hyperv/hv_vtl.c > +++ b/arch/x86/hyperv/hv_vtl.c > @@ -30,6 +30,7 @@ void __init hv_vtl_init_platform(void) > x86_platform.realmode_init = x86_init_noop; > x86_init.irqs.pre_vector_init = x86_init_noop; > x86_init.timers.timer_init = x86_init_noop; > + x86_init.resources.probe_roms = x86_init_noop; > > /* Avoid searching for BIOS MP tables */ > x86_init.mpparse.find_mptable = x86_init_noop; > > base-commit: 37136bf5c3a6f6b686d74f41837a6406bec6b7bc > -- > 2.43.0 Thanks, Naman! Tested-by: Roman Kisel <romank@xxxxxxxxxxxxxxxxxxx> Reviewed-by: Roman Kisel <romank@xxxxxxxxxxxxxxxxxxx>
