Hi, Paolo On Thu, May 28, 2020 at 3:36 PM Aleksandar Markovic <aleksandar.qemu.devel@xxxxxxxxx> wrote: > > нед, 24. мај 2020. у 13:13 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) 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. > > > > Huacai, Paolo, Thomas, > > As you know, there are number of Huacai's patches to QEMU, related > to this series, actually we could call them counterparts to this series. > > Regarding QEMU upstreaming, unless someone objects, I plan to send > pull request that will include some of Huacai-s QEMU patches in next few > days - those that are of general nature, do not rely on any kernel changes, > and passed review process. The rest of Huacai's QEMU patches will wait > for this series to be integrated in kernel upstream. > > Please give Huacai and myself some direction and path to go forward with > this series. Please take into account that we inherit KVM for MIPS in an > "orphaned" state, and do not know exactly all details how to "adopt" it. > Forgive us if we made some missteps along the route. > > We would like to establish a long-lasting, and high-quality, workflow that > will fit well to both KVM and MIPS kernel development. > > Please help us do it. > > Thanks in advance! > > Aleksandar > If you will take this series after MIPS tree be merged into upstream, maybe V7 is better for you. Huacai > > > > 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. > > > > V3 -> V4: > > 1, Emulate LOONGSON_CFG0/LOONGSON_CFG3 in CPUCFG correctly. > > 2, Update commit messages to explain Loongson-3 Virtual IPI. > > 3, Add Reviewed-by: Aleksandar Markovic <aleksandar.qemu.devel@xxxxxxxxx>. > > > > V4 -> V5: > > 1, Fix a typo. > > 2, Update MAINTAINERS. > > > > V5 -> V6: > > 1, Fix a mismatch during rebasing. > > 2, Add Acked-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>. > > > > V6 -> V7: > > 1, Rebase on latest mips-next (Config6 feature bits definition updated). > > > > V7 -> V8: > > 1, Rebase to be applied on kvm tree, i.e., the linux-next branch of > > https://git.kernel.org/pub/scm/virt/kvm/kvm.git/. Building KVM/MIPS > > need commit 3fbfb4585bfd4ff34e ("mips: define pud_index() regardless > > of page table folding"), which has already been in mips tree but not > > in kvm tree. > > > > 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(13): > > 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 > > MAINTAINERS: Update KVM/MIPS maintainers > > > > Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx> > > --- > > MAINTAINERS | 4 +- > > 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 | 37 +++ > > 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 | 237 ++++++++++++----- > > 18 files changed, 1118 insertions(+), 167 deletions(-) > > create mode 100644 arch/mips/kvm/loongson_ipi.c > > -- > > 2.7.0
