On 06/22/17 22:37, Brijesh Singh wrote: > SEV guest VMs have the concept of private and shared memory. Private > memory is encrypted with the guest-specific key, while shared memory > may be encrypted with hypervisor key. Certain types of memory (namely > instruction pages and guest page tables) are always treated as private > memory by the hardware. The C-bit in PTE indicate whether the page is > private or shared. The C-bit position for the PTE can be obtained from > CPUID Fn8000_001F[EBX]. > > When SEV is active, the BIOS is encrypted by the Qemu launch sequence, > we must set the C-bit when building the page table. > > Cc: Jordan Justen <[email protected]> > Cc: Laszlo Ersek <[email protected]> > Cc: Tom Lendacky <[email protected]> > Contributed-under: TianoCore Contribution Agreement 1.0 > Signed-off-by: Brijesh Singh <[email protected]> > Reviewed-by: Laszlo Ersek <[email protected]> > --- > OvmfPkg/ResetVector/Ia32/PageTables64.asm | 62 +++++++++++++++++++- > 1 file changed, 61 insertions(+), 1 deletion(-)
My R-b stands; your modifications relative to v6 patch match the discussion under the v6 patch. Thanks Laszlo _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
