| Message ID | 1590220602-3547-1-git-send-email-chenhc@lemote.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | KVM: MIPS: Add Loongson-3 support (Host Side) | expand |
> V6 -> V7: > 1, Rebase on latest mips-next (Config6 feature bits definition updated). > Hi, Paolo, Huacai I am not entirely familiar with KVM/kernel workflow, but my strong impression is that Huacai should provide Paolo with the series that apply problemless to linux master (including all possible patches that should precede the series, like the mentioned Jiaxun=s patch), not to mips-next. Paolo could probably deal with the current situation by applying separately Jiaxun;s patch from mips-next, but it seems to me that this is not the optimal approach for the future, and that it complicates the workflow - Huacai (or any other person involved in KVM/MIPS development for that matter) should base his KVM patches on linux master. Am I right, or am I wrong? Yours, Aleksandar
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@gmail.com>. > > V4 -> V5: > 1, Fix a typo. > 2, Update MAINTAINERS. > > V5 -> V6: > 1, Fix a mismatch during rebasing. > 2, Add Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>. > > 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@lemote.com> > --- > 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 >
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@gmail.com>. V4 -> V5: 1, Fix a typo. 2, Update MAINTAINERS. V5 -> V6: 1, Fix a mismatch during rebasing. 2, Add Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>. V6 -> V7: 1, Rebase on latest mips-next (Config6 feature bits definition updated). 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@lemote.com> --- 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