Messages in this thread | | | From | "bibo, mao" <> | Date | Tue, 13 Jun 2023 20:49:26 +0800 | Subject | Re: [PATCH v13 03/30] LoongArch: KVM: Implement kvm hardware enable, disable interface |
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在 2023/6/9 17:08, Tianrui Zhao 写道: > Implement kvm hardware enable, disable interface, setting > the guest config register to enable virtualization features > when called the interface. > > Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn> > --- > arch/loongarch/kvm/main.c | 64 +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 64 insertions(+) > > diff --git a/arch/loongarch/kvm/main.c b/arch/loongarch/kvm/main.c > index f98c1619725f..5ebae1ea7565 100644 > --- a/arch/loongarch/kvm/main.c > +++ b/arch/loongarch/kvm/main.c > @@ -195,6 +195,70 @@ static void _kvm_init_gcsr_flag(void) > set_gcsr_sw_flag(LOONGARCH_CSR_PERFCNTR3); > } > > +void kvm_init_vmcs(struct kvm *kvm) > +{ > + kvm->arch.vmcs = vmcs; > +} > + > +long kvm_arch_dev_ioctl(struct file *filp, > + unsigned int ioctl, unsigned long arg) > +{ > + return -ENOIOCTLCMD; > +} > + > +#ifdef CONFIG_KVM_GENERIC_HARDWARE_ENABLING Can we remove macro CONFIG_KVM_GENERIC_HARDWARE_ENABLING here since it is always enabled? The other looks good to me.
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Regards Bibo, Mao > +int kvm_arch_hardware_enable(void) > +{ > + unsigned long env, gcfg = 0; > + > + env = read_csr_gcfg(); > + /* First init gtlbc, gcfg, gstat, gintc. All guest use the same config */ > + clear_csr_gtlbc(CSR_GTLBC_USETGID | CSR_GTLBC_TOTI); > + write_csr_gcfg(0); > + write_csr_gstat(0); > + write_csr_gintc(0); > + > + /* > + * Enable virtualization features granting guest direct control of > + * certain features: > + * GCI=2: Trap on init or unimplement cache instruction. > + * TORU=0: Trap on Root Unimplement. > + * CACTRL=1: Root control cache. > + * TOP=0: Trap on Previlege. > + * TOE=0: Trap on Exception. > + * TIT=0: Trap on Timer. > + */ > + if (env & CSR_GCFG_GCIP_ALL) > + gcfg |= CSR_GCFG_GCI_SECURE; > + if (env & CSR_GCFG_MATC_ROOT) > + gcfg |= CSR_GCFG_MATC_ROOT; > + > + gcfg |= CSR_GCFG_TIT; > + write_csr_gcfg(gcfg); > + > + kvm_flush_tlb_all(); > + > + /* Enable using TGID */ > + set_csr_gtlbc(CSR_GTLBC_USETGID); > + kvm_debug("gtlbc:%llx gintc:%llx gstat:%llx gcfg:%llx", > + read_csr_gtlbc(), read_csr_gintc(), > + read_csr_gstat(), read_csr_gcfg()); > + > + return 0; > +} > + > +void kvm_arch_hardware_disable(void) > +{ > + clear_csr_gtlbc(CSR_GTLBC_USETGID | CSR_GTLBC_TOTI); > + write_csr_gcfg(0); > + write_csr_gstat(0); > + write_csr_gintc(0); > + > + /* Flush any remaining guest TLB entries */ > + kvm_flush_tlb_all(); > +} > +#endif > + > static int kvm_loongarch_env_init(void) > { > struct kvm_context *context;
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