| Message ID | 1247703135-27408-1-git-send-email-jordan.l.justen@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index 272514c..0086332 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -372,7 +372,7 @@ enum vmcs_field { #define VMX_EPT_EXECUTABLE_MASK 0x4ull #define VMX_EPT_IGMT_BIT (1ull << 6) -#define VMX_EPT_IDENTITY_PAGETABLE_ADDR 0xfffbc000ul +#define VMX_EPT_IDENTITY_PAGETABLE_ADDR 0xfeffc000ul #define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
Previously the KVM kernel module would allocate the address range of 0xfffbc000-0xfffbcfff for the EPT Indentity Page Tables. This change moves that to 0xfeffc000-0xfeffcfff. Another issue related to this change is the VMC TSS Pages were located at 0xfffbd000-0xfffbffff. This is controlled by the qemu-kvm code. A separate change will move them to 0xfeffd000-0xfeffffff. From a high level, these are the effects of these two changes: Previously, the KVM would only accommodate a 256KB BIOS image. With these changes, the BIOS image may now grow to 16MB. Motivation for making these changes: A larger firmware image size allows alternative BIOS images to be used with KVM. Some possible uses are to enable UEFI firmware or coreboot firmware. Additionally, an alternative firmware might include a linux kernel+initrd payload, which would require several megabytes. Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> --- arch/x86/include/asm/vmx.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)