On 19/03/14 16:33, Paolo Bonzini wrote:
> Il 14/03/2014 13:47, James Hogan ha scritto:
>> + if (kvm_enabled()) {
>> + /* KVM T&E adds guest kernel segments in useg */
>> + if (real_address >= KVM_KSEG0_BASE) {
>> + if (real_address < KVM_KSEG2_BASE) {
>> + /* kseg0 */
>> + address += KSEG0_BASE - KVM_KSEG0_BASE;
>> + } else if (real_address <= USEG_LIMIT) {
>> + /* kseg2/3 */
>> + address += KSEG2_BASE - KVM_KSEG2_BASE;
>> + }
>> + }
>> + }
>
> Besides changing the segment bases, is there anything else to do to run
> KVM-enabled kernels under TCG? (I know nothing about MIPS and it
> shows). We should consider adding a knob to run them in TCG mode.
>
> This is not blocking this series, and I'm okay with helping or even
> doing the work, if somebody tells me what to do. :)
That's a good idea. It's pretty much just the extra segments I think. In
TCG mode the bootloader wouldn't even need to do anything different
since it can translate fine from the reset vector in kseg1 (where a KVM
guest cannot execute from) and it'll still jump to the kernel entry
point from the ELF.
I'll add it to my list :)
Cheers
James
Attachment:
signature.asc
Description: OpenPGP digital signature
