On Wed, Feb 10, 2021 at 11:21:28AM +0100, Joerg Roedel wrote: > From: Joerg Roedel <jroedel@xxxxxxx> > > Hi, > > these patches add support for the 32-bit boot in the decompressor > code. This is needed to boot an SEV-ES guest on some firmware and grub > versions. The patches also add the necessary CPUID sanity checks and a Could you expand a bit please? What GRUB versions are we talking about (CC-ing Daniel Kiper, who owns GRUB). By 'some firmware' we talking SeaBIOS? > 32-bit version of the C-bit check. > > Other updates included here: > > 1. Add code to shut down exception handling in the > decompressor code before jumping to the real kernel. > Once in the real kernel it is not safe anymore to jump > back to the decompressor code via exceptions. > > 2. Replace open-coded hlt loops with proper calls to > sev_es_terminate(). > > Please review. > > Thanks, > > Joerg > > Joerg Roedel (7): > x86/boot/compressed/64: Cleanup exception handling before booting > kernel > x86/boot/compressed/64: Reload CS in startup_32 > x86/boot/compressed/64: Setup IDT in startup_32 boot path > x86/boot/compressed/64: Add 32-bit boot #VC handler > x86/boot/compressed/64: Add CPUID sanity check to 32-bit boot-path > x86/boot/compressed/64: Check SEV encryption in 32-bit boot-path > x86/sev-es: Replace open-coded hlt-loops with sev_es_terminate() > > arch/x86/boot/compressed/head_64.S | 168 ++++++++++++++++++++++++- > arch/x86/boot/compressed/idt_64.c | 14 +++ > arch/x86/boot/compressed/mem_encrypt.S | 114 ++++++++++++++++- > arch/x86/boot/compressed/misc.c | 7 +- > arch/x86/boot/compressed/misc.h | 6 + > arch/x86/boot/compressed/sev-es.c | 12 +- > arch/x86/kernel/sev-es-shared.c | 10 +- > 7 files changed, 307 insertions(+), 24 deletions(-) > > -- > 2.30.0 >
