On Tue, Feb 11, 2020 at 02:41:25PM -0800, Andy Lutomirski wrote: > On Tue, Feb 11, 2020 at 5:53 AM Joerg Roedel <joro@xxxxxxxxxx> wrote: > > > > From: Joerg Roedel <jroedel@xxxxxxx> > > > > With SEV-ES, exception handling is needed very early, even before the > > kernel has cleared the bss segment. In order to prevent clearing the > > currently used IDT, move the IDT to the data segment. > > Ugh. At the very least this needs a comment in the code. Yes, right, added a comment for that. > I had a patch to fix the kernel ELF loader to clear BSS, which would > fix this problem once and for all, but it didn't work due to the messy > way that the decompressor handles memory. I never got around to > fixing this, sadly. Aren't there other ways of booting (Xen-PV?) which don't use the kernel ELF loader? Regards, Joerg
