Message ID | 20230530015223.147755-13-zhaotianrui@loongson.cn (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | Add KVM LoongArch support | expand |
Reviewed-by: Bibo, Mao <maobibo@loongson.cn> 在 2023/5/30 09:52, Tianrui Zhao 写道: > Implement vcpu interrupt operations such as vcpu set irq and > vcpu clear irq, using set_gcsr_estat to set irq which is > parsed by the irq bitmap. > > Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn> > --- > arch/loongarch/kvm/interrupt.c | 127 +++++++++++++++++++++++++++++++++ > arch/loongarch/kvm/vcpu.c | 45 ++++++++++++ > 2 files changed, 172 insertions(+) > create mode 100644 arch/loongarch/kvm/interrupt.c > > diff --git a/arch/loongarch/kvm/interrupt.c b/arch/loongarch/kvm/interrupt.c > new file mode 100644 > index 000000000000..243bb19b387e > --- /dev/null > +++ b/arch/loongarch/kvm/interrupt.c > @@ -0,0 +1,127 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited > + */ > + > +#include <linux/errno.h> > +#include <linux/err.h> > +#include <asm/kvm_vcpu.h> > +#include <asm/kvm_csr.h> > + > +static unsigned int int_to_coreint[EXCCODE_INT_NUM] = { > + [INT_TI] = CPU_TIMER, > + [INT_IPI] = CPU_IPI, > + [INT_SWI0] = CPU_SIP0, > + [INT_SWI1] = CPU_SIP1, > + [INT_HWI0] = CPU_IP0, > + [INT_HWI1] = CPU_IP1, > + [INT_HWI2] = CPU_IP2, > + [INT_HWI3] = CPU_IP3, > + [INT_HWI4] = CPU_IP4, > + [INT_HWI5] = CPU_IP5, > + [INT_HWI6] = CPU_IP6, > + [INT_HWI7] = CPU_IP7, > +}; > + > +static int _kvm_irq_deliver(struct kvm_vcpu *vcpu, unsigned int priority) > +{ > + unsigned int irq = 0; > + > + clear_bit(priority, &vcpu->arch.irq_pending); > + if (priority < EXCCODE_INT_NUM) > + irq = int_to_coreint[priority]; > + > + switch (priority) { > + case INT_TI: > + case INT_IPI: > + case INT_SWI0: > + case INT_SWI1: > + set_gcsr_estat(irq); > + break; > + > + case INT_HWI0: > + case INT_HWI1: > + case INT_HWI2: > + case INT_HWI3: > + case INT_HWI4: > + case INT_HWI5: > + case INT_HWI6: > + case INT_HWI7: > + set_csr_gintc(irq); > + break; > + > + default: > + break; > + } > + > + return 1; > +} > + > +static int _kvm_irq_clear(struct kvm_vcpu *vcpu, unsigned int priority) > +{ > + unsigned int irq = 0; > + > + clear_bit(priority, &vcpu->arch.irq_clear); > + if (priority < EXCCODE_INT_NUM) > + irq = int_to_coreint[priority]; > + > + switch (priority) { > + case INT_TI: > + case INT_IPI: > + case INT_SWI0: > + case INT_SWI1: > + clear_gcsr_estat(irq); > + break; > + > + case INT_HWI0: > + case INT_HWI1: > + case INT_HWI2: > + case INT_HWI3: > + case INT_HWI4: > + case INT_HWI5: > + case INT_HWI6: > + case INT_HWI7: > + clear_csr_gintc(irq); > + break; > + > + default: > + break; > + } > + > + return 1; > +} > + > +void _kvm_deliver_intr(struct kvm_vcpu *vcpu) > +{ > + unsigned long *pending = &vcpu->arch.irq_pending; > + unsigned long *pending_clr = &vcpu->arch.irq_clear; > + unsigned int priority; > + > + if (!(*pending) && !(*pending_clr)) > + return; > + > + if (*pending_clr) { > + priority = __ffs(*pending_clr); > + while (priority <= INT_IPI) { > + _kvm_irq_clear(vcpu, priority); > + priority = find_next_bit(pending_clr, > + BITS_PER_BYTE * sizeof(*pending_clr), > + priority + 1); > + } > + } > + > + if (*pending) { > + priority = __ffs(*pending); > + while (priority <= INT_IPI) { > + _kvm_irq_deliver(vcpu, priority); > + priority = find_next_bit(pending, > + BITS_PER_BYTE * sizeof(*pending), > + priority + 1); > + } > + } > +} > + > +int _kvm_pending_timer(struct kvm_vcpu *vcpu) > +{ > + return test_bit(INT_TI, &vcpu->arch.irq_pending); > +} > diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c > index 60213f7f7bac..f661743dbe66 100644 > --- a/arch/loongarch/kvm/vcpu.c > +++ b/arch/loongarch/kvm/vcpu.c > @@ -304,6 +304,51 @@ void kvm_lose_fpu(struct kvm_vcpu *vcpu) > preempt_enable(); > } > > +int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, > + struct kvm_loongarch_interrupt *irq) > +{ > + int intr = (int)irq->irq; > + struct kvm_vcpu *dvcpu = NULL; > + > + if (irq->cpu == -1) > + dvcpu = vcpu; > + else > + dvcpu = kvm_get_vcpu(vcpu->kvm, irq->cpu); > + > + if (intr > 0) > + _kvm_queue_irq(dvcpu, intr); > + else if (intr < 0) > + _kvm_dequeue_irq(dvcpu, -intr); > + else { > + kvm_err("%s: invalid interrupt ioctl (%d:%d)\n", __func__, > + irq->cpu, irq->irq); > + return -EINVAL; > + } > + > + kvm_vcpu_kick(dvcpu); > + return 0; > +} > + > +long kvm_arch_vcpu_async_ioctl(struct file *filp, > + unsigned int ioctl, unsigned long arg) > +{ > + struct kvm_vcpu *vcpu = filp->private_data; > + void __user *argp = (void __user *)arg; > + > + if (ioctl == KVM_INTERRUPT) { > + struct kvm_loongarch_interrupt irq; > + > + if (copy_from_user(&irq, argp, sizeof(irq))) > + return -EFAULT; > + kvm_debug("[%d] %s: irq: %d\n", vcpu->vcpu_id, __func__, > + irq.irq); > + > + return kvm_vcpu_ioctl_interrupt(vcpu, &irq); > + } > + > + return -ENOIOCTLCMD; > +} > + > int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id) > { > return 0;
On 05/30/2023 09:52 AM, Tianrui Zhao wrote: > Implement vcpu interrupt operations such as vcpu set irq and > vcpu clear irq, using set_gcsr_estat to set irq which is > parsed by the irq bitmap. > > Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn> > --- > arch/loongarch/kvm/interrupt.c | 127 +++++++++++++++++++++++++++++++++ > arch/loongarch/kvm/vcpu.c | 45 ++++++++++++ > 2 files changed, 172 insertions(+) > create mode 100644 arch/loongarch/kvm/interrupt.c > > diff --git a/arch/loongarch/kvm/interrupt.c b/arch/loongarch/kvm/interrupt.c > new file mode 100644 > index 000000000000..243bb19b387e > --- /dev/null > +++ b/arch/loongarch/kvm/interrupt.c > @@ -0,0 +1,127 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited > + */ > + > +#include <linux/errno.h> > +#include <linux/err.h> > +#include <asm/kvm_vcpu.h> > +#include <asm/kvm_csr.h> > + > +static unsigned int int_to_coreint[EXCCODE_INT_NUM] = { > + [INT_TI] = CPU_TIMER, > + [INT_IPI] = CPU_IPI, > + [INT_SWI0] = CPU_SIP0, > + [INT_SWI1] = CPU_SIP1, > + [INT_HWI0] = CPU_IP0, > + [INT_HWI1] = CPU_IP1, > + [INT_HWI2] = CPU_IP2, > + [INT_HWI3] = CPU_IP3, > + [INT_HWI4] = CPU_IP4, > + [INT_HWI5] = CPU_IP5, > + [INT_HWI6] = CPU_IP6, > + [INT_HWI7] = CPU_IP7, > +}; > + > +static int _kvm_irq_deliver(struct kvm_vcpu *vcpu, unsigned int priority) > +{ > + unsigned int irq = 0; > + > + clear_bit(priority, &vcpu->arch.irq_pending); > + if (priority < EXCCODE_INT_NUM) > + irq = int_to_coreint[priority]; > + > + switch (priority) { > + case INT_TI: > + case INT_IPI: > + case INT_SWI0: > + case INT_SWI1: > + set_gcsr_estat(irq); > + break; > + > + case INT_HWI0: > + case INT_HWI1: > + case INT_HWI2: > + case INT_HWI3: > + case INT_HWI4: > + case INT_HWI5: > + case INT_HWI6: > + case INT_HWI7: It can be simplified to, case INT_HWI0 ... INT_HWI7: > + set_csr_gintc(irq); > + break; > + > + default: > + break; > + } > + > + return 1; > +} > + > +static int _kvm_irq_clear(struct kvm_vcpu *vcpu, unsigned int priority) > +{ > + unsigned int irq = 0; > + > + clear_bit(priority, &vcpu->arch.irq_clear); > + if (priority < EXCCODE_INT_NUM) > + irq = int_to_coreint[priority]; > + > + switch (priority) { > + case INT_TI: > + case INT_IPI: > + case INT_SWI0: > + case INT_SWI1: > + clear_gcsr_estat(irq); > + break; > + > + case INT_HWI0: > + case INT_HWI1: > + case INT_HWI2: > + case INT_HWI3: > + case INT_HWI4: > + case INT_HWI5: > + case INT_HWI6: > + case INT_HWI7: ditto. Thanks, Youling > + clear_csr_gintc(irq); > + break; > + > + default: > + break; > + } > + > + return 1; > +}
在 2023年06月06日 14:49, Youling Tang 写道: > > > On 05/30/2023 09:52 AM, Tianrui Zhao wrote: >> Implement vcpu interrupt operations such as vcpu set irq and >> vcpu clear irq, using set_gcsr_estat to set irq which is >> parsed by the irq bitmap. >> >> Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn> >> --- >> arch/loongarch/kvm/interrupt.c | 127 +++++++++++++++++++++++++++++++++ >> arch/loongarch/kvm/vcpu.c | 45 ++++++++++++ >> 2 files changed, 172 insertions(+) >> create mode 100644 arch/loongarch/kvm/interrupt.c >> >> diff --git a/arch/loongarch/kvm/interrupt.c >> b/arch/loongarch/kvm/interrupt.c >> new file mode 100644 >> index 000000000000..243bb19b387e >> --- /dev/null >> +++ b/arch/loongarch/kvm/interrupt.c >> @@ -0,0 +1,127 @@ >> +// SPDX-License-Identifier: GPL-2.0 >> +/* >> + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited >> + */ >> + >> +#include <linux/errno.h> >> +#include <linux/err.h> >> +#include <asm/kvm_vcpu.h> >> +#include <asm/kvm_csr.h> >> + >> +static unsigned int int_to_coreint[EXCCODE_INT_NUM] = { >> + [INT_TI] = CPU_TIMER, >> + [INT_IPI] = CPU_IPI, >> + [INT_SWI0] = CPU_SIP0, >> + [INT_SWI1] = CPU_SIP1, >> + [INT_HWI0] = CPU_IP0, >> + [INT_HWI1] = CPU_IP1, >> + [INT_HWI2] = CPU_IP2, >> + [INT_HWI3] = CPU_IP3, >> + [INT_HWI4] = CPU_IP4, >> + [INT_HWI5] = CPU_IP5, >> + [INT_HWI6] = CPU_IP6, >> + [INT_HWI7] = CPU_IP7, >> +}; >> + >> +static int _kvm_irq_deliver(struct kvm_vcpu *vcpu, unsigned int >> priority) >> +{ >> + unsigned int irq = 0; >> + >> + clear_bit(priority, &vcpu->arch.irq_pending); >> + if (priority < EXCCODE_INT_NUM) >> + irq = int_to_coreint[priority]; >> + >> + switch (priority) { >> + case INT_TI: >> + case INT_IPI: >> + case INT_SWI0: >> + case INT_SWI1: >> + set_gcsr_estat(irq); >> + break; >> + >> + case INT_HWI0: >> + case INT_HWI1: >> + case INT_HWI2: >> + case INT_HWI3: >> + case INT_HWI4: >> + case INT_HWI5: >> + case INT_HWI6: >> + case INT_HWI7: > It can be simplified to, > case INT_HWI0 ... INT_HWI7: Thanks, I will simplify those case statement. Thanks Tianrui Zhao > >> + set_csr_gintc(irq); >> + break; >> + >> + default: >> + break; >> + } >> + >> + return 1; >> +} >> + >> +static int _kvm_irq_clear(struct kvm_vcpu *vcpu, unsigned int priority) >> +{ >> + unsigned int irq = 0; >> + >> + clear_bit(priority, &vcpu->arch.irq_clear); >> + if (priority < EXCCODE_INT_NUM) >> + irq = int_to_coreint[priority]; >> + >> + switch (priority) { >> + case INT_TI: >> + case INT_IPI: >> + case INT_SWI0: >> + case INT_SWI1: >> + clear_gcsr_estat(irq); >> + break; >> + >> + case INT_HWI0: >> + case INT_HWI1: >> + case INT_HWI2: >> + case INT_HWI3: >> + case INT_HWI4: >> + case INT_HWI5: >> + case INT_HWI6: >> + case INT_HWI7: > ditto. > > Thanks, > Youling >> + clear_csr_gintc(irq); >> + break; >> + >> + default: >> + break; >> + } >> + >> + return 1; >> +}
diff --git a/arch/loongarch/kvm/interrupt.c b/arch/loongarch/kvm/interrupt.c new file mode 100644 index 000000000000..243bb19b387e --- /dev/null +++ b/arch/loongarch/kvm/interrupt.c @@ -0,0 +1,127 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited + */ + +#include <linux/errno.h> +#include <linux/err.h> +#include <asm/kvm_vcpu.h> +#include <asm/kvm_csr.h> + +static unsigned int int_to_coreint[EXCCODE_INT_NUM] = { + [INT_TI] = CPU_TIMER, + [INT_IPI] = CPU_IPI, + [INT_SWI0] = CPU_SIP0, + [INT_SWI1] = CPU_SIP1, + [INT_HWI0] = CPU_IP0, + [INT_HWI1] = CPU_IP1, + [INT_HWI2] = CPU_IP2, + [INT_HWI3] = CPU_IP3, + [INT_HWI4] = CPU_IP4, + [INT_HWI5] = CPU_IP5, + [INT_HWI6] = CPU_IP6, + [INT_HWI7] = CPU_IP7, +}; + +static int _kvm_irq_deliver(struct kvm_vcpu *vcpu, unsigned int priority) +{ + unsigned int irq = 0; + + clear_bit(priority, &vcpu->arch.irq_pending); + if (priority < EXCCODE_INT_NUM) + irq = int_to_coreint[priority]; + + switch (priority) { + case INT_TI: + case INT_IPI: + case INT_SWI0: + case INT_SWI1: + set_gcsr_estat(irq); + break; + + case INT_HWI0: + case INT_HWI1: + case INT_HWI2: + case INT_HWI3: + case INT_HWI4: + case INT_HWI5: + case INT_HWI6: + case INT_HWI7: + set_csr_gintc(irq); + break; + + default: + break; + } + + return 1; +} + +static int _kvm_irq_clear(struct kvm_vcpu *vcpu, unsigned int priority) +{ + unsigned int irq = 0; + + clear_bit(priority, &vcpu->arch.irq_clear); + if (priority < EXCCODE_INT_NUM) + irq = int_to_coreint[priority]; + + switch (priority) { + case INT_TI: + case INT_IPI: + case INT_SWI0: + case INT_SWI1: + clear_gcsr_estat(irq); + break; + + case INT_HWI0: + case INT_HWI1: + case INT_HWI2: + case INT_HWI3: + case INT_HWI4: + case INT_HWI5: + case INT_HWI6: + case INT_HWI7: + clear_csr_gintc(irq); + break; + + default: + break; + } + + return 1; +} + +void _kvm_deliver_intr(struct kvm_vcpu *vcpu) +{ + unsigned long *pending = &vcpu->arch.irq_pending; + unsigned long *pending_clr = &vcpu->arch.irq_clear; + unsigned int priority; + + if (!(*pending) && !(*pending_clr)) + return; + + if (*pending_clr) { + priority = __ffs(*pending_clr); + while (priority <= INT_IPI) { + _kvm_irq_clear(vcpu, priority); + priority = find_next_bit(pending_clr, + BITS_PER_BYTE * sizeof(*pending_clr), + priority + 1); + } + } + + if (*pending) { + priority = __ffs(*pending); + while (priority <= INT_IPI) { + _kvm_irq_deliver(vcpu, priority); + priority = find_next_bit(pending, + BITS_PER_BYTE * sizeof(*pending), + priority + 1); + } + } +} + +int _kvm_pending_timer(struct kvm_vcpu *vcpu) +{ + return test_bit(INT_TI, &vcpu->arch.irq_pending); +} diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index 60213f7f7bac..f661743dbe66 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -304,6 +304,51 @@ void kvm_lose_fpu(struct kvm_vcpu *vcpu) preempt_enable(); } +int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, + struct kvm_loongarch_interrupt *irq) +{ + int intr = (int)irq->irq; + struct kvm_vcpu *dvcpu = NULL; + + if (irq->cpu == -1) + dvcpu = vcpu; + else + dvcpu = kvm_get_vcpu(vcpu->kvm, irq->cpu); + + if (intr > 0) + _kvm_queue_irq(dvcpu, intr); + else if (intr < 0) + _kvm_dequeue_irq(dvcpu, -intr); + else { + kvm_err("%s: invalid interrupt ioctl (%d:%d)\n", __func__, + irq->cpu, irq->irq); + return -EINVAL; + } + + kvm_vcpu_kick(dvcpu); + return 0; +} + +long kvm_arch_vcpu_async_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg) +{ + struct kvm_vcpu *vcpu = filp->private_data; + void __user *argp = (void __user *)arg; + + if (ioctl == KVM_INTERRUPT) { + struct kvm_loongarch_interrupt irq; + + if (copy_from_user(&irq, argp, sizeof(irq))) + return -EFAULT; + kvm_debug("[%d] %s: irq: %d\n", vcpu->vcpu_id, __func__, + irq.irq); + + return kvm_vcpu_ioctl_interrupt(vcpu, &irq); + } + + return -ENOIOCTLCMD; +} + int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id) { return 0;
Implement vcpu interrupt operations such as vcpu set irq and vcpu clear irq, using set_gcsr_estat to set irq which is parsed by the irq bitmap. Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn> --- arch/loongarch/kvm/interrupt.c | 127 +++++++++++++++++++++++++++++++++ arch/loongarch/kvm/vcpu.c | 45 ++++++++++++ 2 files changed, 172 insertions(+) create mode 100644 arch/loongarch/kvm/interrupt.c