On 23/05/20 09:56, Huacai Chen wrote: > 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. > > 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). Queued, thanks. Please check the queue branch of kvm.git. Paolo > 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 | 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 | 237 ++++++++++++----- > 18 files changed, 1092 insertions(+), 167 deletions(-) > create mode 100644 arch/mips/kvm/loongson_ipi.c > -- > 2.7.0 >
