Hi, Aleksandar, On Fri, May 8, 2020 at 7:43 PM Aleksandar Markovic <aleksandar.qemu.devel@xxxxxxxxx> wrote: > > нед, 3. мај 2020. у 12:06 Huacai Chen <chenhc@xxxxxxxxxx> је написао/ла: > > > > We are preparing to add KVM support for Loongson-3. VZ extension is > > fully supported in Loongson-3A R4+, and we will not care about old CPUs > > (at least now). We already have a full functional Linux kernel (based > > on Linux-5.4.x LTS) and QEMU (based on 5.0.0-rc2) and their git > > repositories are here: > > > > QEMU: https://github.com/chenhuacai/qemu > > Kernel: https://github.com/chenhuacai/linux > > > > Of course these two repositories need to be rework and not suitable for > > upstream (especially the commits need to be splitted). We show them here > > is just to tell others what we have done, and how KVM/Loongson will look > > like. > > > > Our plan is make the KVM host side be upstream first, and after that, > > we will make the KVM guest side and QEMU emulator be upstream. > > > > Huacei, I absolutely salute this series, as it is, in my opinion, of > tremendous significance not only for Loongson, but also for KVM for > MIPS in general. > > As you probably know, James Hogan left KVM for MIPS kernel > maintainership some time ago. It was really too bad, as he was and > still is, from my direct experience, an excellent colleague and > engineer. > > KVM for MIPS kernel maintainership left orphaned put me (as the > maintainer for KVM for MIPS in QEMU) in an awkward position. > > May I ask that you and me jointly assume KVM for MIPS kernel > maintainership? For me, it makes perfect sense, and I would certainly > enjoy working with you. If you agree, please add such patch at the end > of this series, in its next version. I'm very glad to join maintainership with you, thank you for your invitation. Regards, Huacai > > Yours, > Aleksandar > > > > V1 -> V2: > > 1, Remove "mips: define pud_index() regardless of page table folding" > > because it has been applied. > > 2, Make Loongson-specific code be guarded by CONFIG_CPU_LOONGSON64. > > > > V2 -> V3: > > 1, Emulate a reduced feature list of CPUCFG. > > 2, Fix all possible checkpatch.pl errors and warnings. > > > > Xing Li(2): > > KVM: MIPS: Define KVM_ENTRYHI_ASID to cpu_asid_mask(&boot_cpu_data) > > KVM: MIPS: Fix VPN2_MASK definition for variable cpu_vmbits > > > > Huacai Chen(12): > > KVM: MIPS: Increase KVM_MAX_VCPUS and KVM_USER_MEM_SLOTS to 16 > > KVM: MIPS: Add EVENTFD support which is needed by VHOST > > KVM: MIPS: Use lddir/ldpte instructions to lookup gpa_mm.pgd > > KVM: MIPS: Introduce and use cpu_guest_has_ldpte > > KVM: MIPS: Use root tlb to control guest's CCA for Loongson-3 > > KVM: MIPS: Let indexed cacheops cause guest exit on Loongson-3 > > KVM: MIPS: Add more types of virtual interrupts > > KVM: MIPS: Add Loongson-3 Virtual IPI interrupt support > > KVM: MIPS: Add CPUCFG emulation for Loongson-3 > > KVM: MIPS: Add CONFIG6 and DIAG registers emulation > > KVM: MIPS: Add more MMIO load/store instructions emulation > > KVM: MIPS: Enable KVM support for Loongson-3 > > > > Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx> > > --- > > arch/mips/Kconfig | 1 + > > arch/mips/include/asm/cpu-features.h | 3 + > > arch/mips/include/asm/kvm_host.h | 52 +++- > > arch/mips/include/asm/mipsregs.h | 7 + > > arch/mips/include/uapi/asm/inst.h | 11 + > > arch/mips/kernel/cpu-probe.c | 2 + > > arch/mips/kvm/Kconfig | 1 + > > arch/mips/kvm/Makefile | 5 +- > > arch/mips/kvm/emulate.c | 503 ++++++++++++++++++++++++++++++++++- > > arch/mips/kvm/entry.c | 19 +- > > arch/mips/kvm/interrupt.c | 93 +------ > > arch/mips/kvm/interrupt.h | 14 +- > > arch/mips/kvm/loongson_ipi.c | 214 +++++++++++++++ > > arch/mips/kvm/mips.c | 49 +++- > > arch/mips/kvm/tlb.c | 41 +++ > > arch/mips/kvm/trap_emul.c | 3 + > > arch/mips/kvm/vz.c | 235 +++++++++++----- > > 17 files changed, 1087 insertions(+), 166 deletions(-) > > create mode 100644 arch/mips/kvm/loongson_ipi.c > > -- > > 2.7.0
