[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH v4 04/10] target-mips: get_physical_address: Add
From: |
James Hogan |
Subject: |
Re: [Qemu-devel] [PATCH v4 04/10] target-mips: get_physical_address: Add KVM awareness |
Date: |
Thu, 20 Mar 2014 10:08:56 +0000 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 |
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
signature.asc
Description: OpenPGP digital signature
- [Qemu-devel] [PATCH v4 00/10] KVM Support for MIPS32 Processors, James Hogan, 2014/03/14
- [Qemu-devel] [PATCH v4 01/10] hw/mips/cputimer: Don't start periodic timer in KVM mode, James Hogan, 2014/03/14
- [Qemu-devel] [PATCH v4 02/10] hw/mips: Add API to convert KVM guest KSEG0 <-> GPA, James Hogan, 2014/03/14
- [Qemu-devel] [PATCH v4 03/10] target-mips: get_physical_address: Add defines for segment bases, James Hogan, 2014/03/14
- [Qemu-devel] [PATCH v4 05/10] kvm: Allow arch to set sigmask length, James Hogan, 2014/03/14
- [Qemu-devel] [PATCH v4 04/10] target-mips: get_physical_address: Add KVM awareness, James Hogan, 2014/03/14
- [Qemu-devel] [PATCH v4 07/10] hw/mips: In KVM mode, inject IRQ2 (I/O) interupts via ioctls, James Hogan, 2014/03/14
- [Qemu-devel] [PATCH v4 08/10] hw/mips: malta: Add KVM support, James Hogan, 2014/03/14
- [Qemu-devel] [PATCH v4 09/10] target-mips: Enable KVM support in build system, James Hogan, 2014/03/14
- [Qemu-devel] [PATCH v4 10/10] MAINTAINERS: Add entry for MIPS KVM, James Hogan, 2014/03/14
- [Qemu-devel] [PATCH v4 06/10] target-mips: kvm: Add main KVM support for MIPS, James Hogan, 2014/03/14
- Re: [Qemu-devel] [PATCH v4 00/10] KVM Support for MIPS32 Processors, Peter Maydell, 2014/03/14
- Re: [Qemu-devel] [PATCH v4 00/10] KVM Support for MIPS32 Processors, Paolo Bonzini, 2014/03/19