This is a follow-up patch for [0] which introduced --force-pci option for riscv. As per the discussion it was concluded to add virtio-tranport option taking in four options (pci, pci-legacy, mmio, mmio-legacy). With this change force-pci and virtio-legacy are both deprecated and arm's default transport changes from MMIO to PCI as agreed in [0]. This is also true for riscv. Nothing changes for other architectures. [0]: https://lore.kernel.org/all/20230118172007.408667-1-rkanwal@xxxxxxxxxxxx/ Signed-off-by: Rajnesh Kanwal <rkanwal@xxxxxxxxxxxx> --- arm/include/arm-common/kvm-arch.h | 5 ---- arm/include/arm-common/kvm-config-arch.h | 8 +++---- builtin-run.c | 11 +++++++-- include/kvm/kvm-config.h | 2 +- include/kvm/kvm.h | 6 +---- include/kvm/virtio.h | 2 ++ riscv/include/kvm/kvm-arch.h | 3 --- virtio/core.c | 29 ++++++++++++++++++++++++ 8 files changed, 46 insertions(+), 20 deletions(-) diff --git a/arm/include/arm-common/kvm-arch.h b/arm/include/arm-common/kvm-arch.h index b2ae373..60eec02 100644 --- a/arm/include/arm-common/kvm-arch.h +++ b/arm/include/arm-common/kvm-arch.h @@ -80,11 +80,6 @@ #define KVM_VM_TYPE 0 -#define VIRTIO_DEFAULT_TRANS(kvm) \ - ((kvm)->cfg.arch.virtio_trans_pci ? \ - ((kvm)->cfg.virtio_legacy ? VIRTIO_PCI_LEGACY : VIRTIO_PCI) : \ - ((kvm)->cfg.virtio_legacy ? VIRTIO_MMIO_LEGACY : VIRTIO_MMIO)) - #define VIRTIO_RING_ENDIAN (VIRTIO_ENDIAN_LE | VIRTIO_ENDIAN_BE) #define ARCH_HAS_PCI_EXP 1 diff --git a/arm/include/arm-common/kvm-config-arch.h b/arm/include/arm-common/kvm-config-arch.h index 9949bfe..2e620fd 100644 --- a/arm/include/arm-common/kvm-config-arch.h +++ b/arm/include/arm-common/kvm-config-arch.h @@ -7,7 +7,6 @@ struct kvm_config_arch { const char *dump_dtb_filename; const char *vcpu_affinity; unsigned int force_cntfrq; - bool virtio_trans_pci; bool aarch32_guest; bool has_pmuv3; bool mte_disabled; @@ -28,9 +27,10 @@ int irqchip_parser(const struct option *opt, const char *arg, int unset); "Specify Generic Timer frequency in guest DT to " \ "work around buggy secure firmware *Firmware should be " \ "updated to program CNTFRQ correctly*"), \ - OPT_BOOLEAN('\0', "force-pci", &(cfg)->virtio_trans_pci, \ - "Force virtio devices to use PCI as their default " \ - "transport"), \ + OPT_CALLBACK_NOOPT('\0', "force-pci", NULL, '\0', \ + "Force virtio devices to use PCI as their default " \ + "transport [Deprecated: Use --virtio-transport " \ + "option instead]", virtio_tranport_parser, kvm), \ OPT_CALLBACK('\0', "irqchip", &(cfg)->irqchip, \ "[gicv2|gicv2m|gicv3|gicv3-its]", \ "Type of interrupt controller to emulate in the guest", \ diff --git a/builtin-run.c b/builtin-run.c index bb7e6e8..50e8796 100644 --- a/builtin-run.c +++ b/builtin-run.c @@ -200,8 +200,15 @@ static int mem_parser(const struct option *opt, const char *arg, int unset) " rootfs"), \ OPT_STRING('\0', "hugetlbfs", &(cfg)->hugetlbfs_path, "path", \ "Hugetlbfs path"), \ - OPT_BOOLEAN('\0', "virtio-legacy", &(cfg)->virtio_legacy, \ - "Use legacy virtio transport"), \ + OPT_CALLBACK_NOOPT('\0', "virtio-legacy", \ + &(cfg)->virtio_transport, '\0', \ + "Use legacy virtio transport [Deprecated:" \ + " Use --virtio-transport option instead]", \ + virtio_tranport_parser, NULL), \ + OPT_CALLBACK('\0', "virtio-transport", &(cfg)->virtio_transport,\ + "[pci|pci-legacy|mmio|mmio-legacy]", \ + "Type of virtio transport", \ + virtio_tranport_parser, NULL), \ \ OPT_GROUP("Kernel options:"), \ OPT_STRING('k', "kernel", &(cfg)->kernel_filename, "kernel", \ diff --git a/include/kvm/kvm-config.h b/include/kvm/kvm-config.h index 368e6c7..592b035 100644 --- a/include/kvm/kvm-config.h +++ b/include/kvm/kvm-config.h @@ -64,7 +64,7 @@ struct kvm_config { bool no_dhcp; bool ioport_debug; bool mmio_debug; - bool virtio_legacy; + int virtio_transport; }; #endif diff --git a/include/kvm/kvm.h b/include/kvm/kvm.h index 3872dc6..7015def 100644 --- a/include/kvm/kvm.h +++ b/include/kvm/kvm.h @@ -45,11 +45,7 @@ struct kvm_cpu; typedef void (*mmio_handler_fn)(struct kvm_cpu *vcpu, u64 addr, u8 *data, u32 len, u8 is_write, void *ptr); -/* Archs can override this in kvm-arch.h */ -#ifndef VIRTIO_DEFAULT_TRANS -#define VIRTIO_DEFAULT_TRANS(kvm) \ - ((kvm)->cfg.virtio_legacy ? VIRTIO_PCI_LEGACY : VIRTIO_PCI) -#endif +#define VIRTIO_DEFAULT_TRANS(kvm) (kvm)->cfg.virtio_transport enum { KVM_VMSTATE_RUNNING, diff --git a/include/kvm/virtio.h b/include/kvm/virtio.h index 94bddef..4a733f5 100644 --- a/include/kvm/virtio.h +++ b/include/kvm/virtio.h @@ -248,4 +248,6 @@ void virtio_set_guest_features(struct kvm *kvm, struct virtio_device *vdev, void virtio_notify_status(struct kvm *kvm, struct virtio_device *vdev, void *dev, u8 status); +int virtio_tranport_parser(const struct option *opt, const char *arg, int unset); + #endif /* KVM__VIRTIO_H */ diff --git a/riscv/include/kvm/kvm-arch.h b/riscv/include/kvm/kvm-arch.h index 1e130f5..4106099 100644 --- a/riscv/include/kvm/kvm-arch.h +++ b/riscv/include/kvm/kvm-arch.h @@ -46,9 +46,6 @@ #define KVM_VM_TYPE 0 -#define VIRTIO_DEFAULT_TRANS(kvm) \ - ((kvm)->cfg.virtio_legacy ? VIRTIO_MMIO_LEGACY : VIRTIO_MMIO) - #define VIRTIO_RING_ENDIAN VIRTIO_ENDIAN_LE #define ARCH_HAS_PCI_EXP 1 diff --git a/virtio/core.c b/virtio/core.c index ea0e5b6..4b863c7 100644 --- a/virtio/core.c +++ b/virtio/core.c @@ -21,6 +21,35 @@ const char* virtio_trans_name(enum virtio_trans trans) return "unknown"; } +int virtio_tranport_parser(const struct option *opt, const char *arg, int unset) +{ + enum virtio_trans *type = opt->value; + + if (!strcmp(opt->long_name, "virtio-transport")) { + if (!strcmp(arg, "pci")) { + *type = VIRTIO_PCI; + } else if (!strcmp(arg, "pci-legacy")) { + *type = VIRTIO_PCI_LEGACY; +#if defined(CONFIG_ARM) || defined(CONFIG_ARM64) || defined(CONFIG_RISCV) + } else if (!strcmp(arg, "mmio")) { + *type = VIRTIO_MMIO; + } else if (!strcmp(arg, "mmio-legacy")) { + *type = VIRTIO_MMIO_LEGACY; +#endif + } else { + pr_err("virtio-transport: unknown type \"%s\"\n", arg); + return -1; + } + } else if (!strcmp(opt->long_name, "virtio-legacy")) { + *type = VIRTIO_PCI_LEGACY; + } else if (!strcmp(opt->long_name, "force-pci")) { + struct kvm *kvm = opt->ptr; + kvm->cfg.virtio_transport = VIRTIO_PCI; + } + + return 0; +} + void virt_queue__used_idx_advance(struct virt_queue *queue, u16 jump) { u16 idx = virtio_guest_to_host_u16(queue, queue->vring.used->idx); -- 2.25.1
