On Fri, Jan 17, 2025 at 09:01:41AM -0800, Roman Kisel wrote: > > 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> Applied to hyperv-fixes. Thanks.
