| Message ID | 20230120224627.4053418-12-quic_eberman@quicinc.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Drivers for gunyah hypervisor | expand |
On 20/01/2023 22:46, Elliot Berman wrote: > Gunyah VM manager is a kernel moduel which exposes an interface to > Gunyah userspace to load, run, and interact with other Gunyah virtual > machines. The interface is a character device at /dev/gunyah. > > Add a basic VM manager driver. Upcoming patches will add more ioctls > into this driver. > > Co-developed-by: Prakruthi Deepak Heragu <quic_pheragu@quicinc.com> > Signed-off-by: Prakruthi Deepak Heragu <quic_pheragu@quicinc.com> > Signed-off-by: Elliot Berman <quic_eberman@quicinc.com> > --- > .../userspace-api/ioctl/ioctl-number.rst | 1 + > drivers/virt/gunyah/Makefile | 2 +- > drivers/virt/gunyah/rsc_mgr.c | 51 +++++++- > drivers/virt/gunyah/vm_mgr.c | 117 ++++++++++++++++++ > drivers/virt/gunyah/vm_mgr.h | 20 +++ > include/linux/gunyah_rsc_mgr.h | 3 + > include/uapi/linux/gunyah.h | 23 ++++ > 7 files changed, 215 insertions(+), 2 deletions(-) > create mode 100644 drivers/virt/gunyah/vm_mgr.c > create mode 100644 drivers/virt/gunyah/vm_mgr.h > create mode 100644 include/uapi/linux/gunyah.h > > diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst > index eb045fc495a4..8696dc3cdd83 100644 > --- a/Documentation/userspace-api/ioctl/ioctl-number.rst > +++ b/Documentation/userspace-api/ioctl/ioctl-number.rst > @@ -137,6 +137,7 @@ Code Seq# Include File Comments > 'F' DD video/sstfb.h conflict! > 'G' 00-3F drivers/misc/sgi-gru/grulib.h conflict! > 'G' 00-0F xen/gntalloc.h, xen/gntdev.h conflict! > +'G' 00-0f linux/gunyah.h conflict! > 'H' 00-7F linux/hiddev.h conflict! > 'H' 00-0F linux/hidraw.h conflict! > 'H' 01 linux/mei.h conflict! > diff --git a/drivers/virt/gunyah/Makefile b/drivers/virt/gunyah/Makefile > index de29769f2f3f..03951cf82023 100644 > --- a/drivers/virt/gunyah/Makefile > +++ b/drivers/virt/gunyah/Makefile > @@ -2,5 +2,5 @@ > > obj-$(CONFIG_GUNYAH) += gunyah.o > > -gunyah_rsc_mgr-y += rsc_mgr.o rsc_mgr_rpc.o > +gunyah_rsc_mgr-y += rsc_mgr.o rsc_mgr_rpc.o vm_mgr.o > obj-$(CONFIG_GUNYAH) += gunyah_rsc_mgr.o > diff --git a/drivers/virt/gunyah/rsc_mgr.c b/drivers/virt/gunyah/rsc_mgr.c > index 382f9943fd31..95f4aa928aaf 100644 > --- a/drivers/virt/gunyah/rsc_mgr.c > +++ b/drivers/virt/gunyah/rsc_mgr.c > @@ -16,8 +16,10 @@ > #include <linux/completion.h> > #include <linux/gunyah_rsc_mgr.h> > #include <linux/platform_device.h> > +#include <linux/miscdevice.h> > > #include "rsc_mgr.h" > +#include "vm_mgr.h" > > #define RM_RPC_API_VERSION_MASK GENMASK(3, 0) > #define RM_RPC_HEADER_WORDS_MASK GENMASK(7, 4) > @@ -105,6 +107,7 @@ struct gh_rm { > struct kmem_cache *cache; > struct mutex send_lock; > > + struct miscdevice miscdev; > struct work_struct recv_work; > }; > > @@ -526,6 +529,33 @@ int gh_rm_call(struct gh_rm *rm, u32 message_id, void *req_buff, size_t req_buff > return ret; > } > > +void get_gh_rm(struct gh_rm *rm) > +{ > + get_device(rm->dev); > +} > +EXPORT_SYMBOL_GPL(get_gh_rm); We have 4/5 different vairants of exported symbols now. EXPORT_SYMBOL_GPL(gunyah_vm_function_unregister); EXPORT_SYMBOL_GPL(ghvm_add_resource_ticket); EXPORT_SYMBOL_GPL(gh_vm_mgr_mmio_write); EXPORT_SYMBOL_GPL(put_gh_rm); EXPORT_SYMBOL_GPL(get_gunyah_vm); I think this needs to be cleaned up for consistency reasons. > + > +void put_gh_rm(struct gh_rm *rm) > +{ > + put_device(rm->dev); > +} > +EXPORT_SYMBOL_GPL(put_gh_rm); > + > +static long gh_dev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) > +{ > + struct miscdevice *miscdev = filp->private_data; > + struct gh_rm *rm = container_of(miscdev, struct gh_rm, miscdev); > + > + return gh_dev_vm_mgr_ioctl(rm, cmd, arg); > +} > + > +static const struct file_operations gh_dev_fops = { > + .owner = THIS_MODULE, > + .unlocked_ioctl = gh_dev_ioctl, > + .compat_ioctl = compat_ptr_ioctl, > + .llseek = noop_llseek, > +}; > + > static int gh_msgq_platform_probe_direction(struct platform_device *pdev, > bool tx, int idx, struct gunyah_resource *ghrsc) > { > @@ -582,13 +612,32 @@ static int gh_rm_drv_probe(struct platform_device *pdev) > rm->msgq_client.rx_callback = gh_rm_msgq_rx_data; > rm->msgq_client.tx_done = gh_rm_msgq_tx_done; > > - return gh_msgq_init(&pdev->dev, &rm->msgq, &rm->msgq_client, &rm->tx_ghrsc, &rm->rx_ghrsc); > + ret = gh_msgq_init(&pdev->dev, &rm->msgq, &rm->msgq_client, &rm->tx_ghrsc, &rm->rx_ghrsc); > + if (ret) > + goto err_cache; > + > + rm->miscdev.name = "gunyah"; > + rm->miscdev.minor = MISC_DYNAMIC_MINOR; > + rm->miscdev.fops = &gh_dev_fops; > + > + ret = misc_register(&rm->miscdev); > + if (ret) > + goto err_msgq; > + > + return 0; > +err_msgq: > + mbox_free_channel(gh_msgq_chan(&rm->msgq)); > + gh_msgq_remove(&rm->msgq); > +err_cache: > + kmem_cache_destroy(rm->cache); > + return ret; > } > > static int gh_rm_drv_remove(struct platform_device *pdev) > { > struct gh_rm *rm = platform_get_drvdata(pdev); > > + misc_deregister(&rm->miscdev); > mbox_free_channel(gh_msgq_chan(&rm->msgq)); > gh_msgq_remove(&rm->msgq); > kmem_cache_destroy(rm->cache); > diff --git a/drivers/virt/gunyah/vm_mgr.c b/drivers/virt/gunyah/vm_mgr.c > new file mode 100644 > index 000000000000..0864dbd77e28 > --- /dev/null > +++ b/drivers/virt/gunyah/vm_mgr.c > @@ -0,0 +1,117 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. > + */ > + > +#define pr_fmt(fmt) "gh_vm_mgr: " fmt > + > +#include <linux/anon_inodes.h> > +#include <linux/file.h> > +#include <linux/gunyah_rsc_mgr.h> > +#include <linux/miscdevice.h> > +#include <linux/module.h> > + > +#include <uapi/linux/gunyah.h> > + > +#include "vm_mgr.h" > + > +static __must_check struct gunyah_vm *gunyah_vm_alloc(struct gh_rm_rpc *rm) > +{ > + struct gunyah_vm *ghvm; > + int vmid; > + > + vmid = gh_rm_alloc_vmid(rm, 0); > + if (vmid < 0) > + return ERR_PTR(vmid); > + > + ghvm = kzalloc(sizeof(*ghvm), GFP_KERNEL); > + if (!ghvm) { > + gh_rm_dealloc_vmid(rm, vmid); > + return ghvm; return ERR_PTR(-ENOMEM); > + } > + > + get_gh_rm(rm); > + > + ghvm->vmid = vmid; > + ghvm->rm = rm; > + > + return ghvm; > +} > + > +static long gh_vm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) > +{ > + long r; > + > + switch (cmd) { > + default: > + r = -ENOTTY; > + break; > + } this function looks like dummy, why do we need this in this patch? > + > + return r; > +} > + > +static int gh_vm_release(struct inode *inode, struct file *filp) > +{ > + struct gunyah_vm *ghvm = filp->private_data; > + > + put_gh_rm(ghvm->rm); > + kfree(ghvm); > + return 0; > +} > + > +static const struct file_operations gh_vm_fops = { > + .unlocked_ioctl = gh_vm_ioctl, > + .release = gh_vm_release, > + .compat_ioctl = compat_ptr_ioctl, > + .llseek = noop_llseek, > +}; > + > +static long gh_dev_ioctl_create_vm(struct gh_rm *rm, unsigned long arg) > +{ > + struct gunyah_vm *ghvm; > + struct file *file; > + int fd, err; > + > + /* arg reserved for future use. */ > + if (arg) > + return -EINVAL; Bit confused here, GH_CREATE_VM IOCTL does not take any arguments so why is this arg reserved for future use. Are you going to change the ABI for GH_CREATE_VM? > + > + ghvm = gunyah_vm_alloc(rm); > + if (IS_ERR_OR_NULL(ghvm)) > + return PTR_ERR(ghvm) ? : -ENOMEM; > + > + fd = get_unused_fd_flags(O_CLOEXEC); > + if (fd < 0) { > + err = fd; > + goto err_destroy_vm; > + } > + > + file = anon_inode_getfile("gunyah-vm", &gh_vm_fops, ghvm, O_RDWR); > + if (IS_ERR(file)) { > + err = PTR_ERR(file); > + goto err_put_fd; > + } > + > + fd_install(fd, file); > + > + return fd; > + > +err_put_fd: > + put_unused_fd(fd); > +err_destroy_vm: > + kfree(ghvm); > + return err; > +} > + > +long gh_dev_vm_mgr_ioctl(struct gh_rm *rm, unsigned int cmd, unsigned long arg) > +{ > + switch (cmd) { > + case GH_CREATE_VM: > + return gh_dev_ioctl_create_vm(rm, arg); > + default: > + return -ENOIOCTLCMD; > + } > +} > +EXPORT_SYMBOL_GPL(gh_dev_vm_mgr_ioctl); > + > diff --git a/drivers/virt/gunyah/vm_mgr.h b/drivers/virt/gunyah/vm_mgr.h > new file mode 100644 > index 000000000000..e47f34de7f9e > --- /dev/null > +++ b/drivers/virt/gunyah/vm_mgr.h > @@ -0,0 +1,20 @@ > +/* SPDX-License-Identifier: GPL-2.0-only */ > +/* > + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. > + */ > + > +#ifndef _GH_PRIV_VM_MGR_H > +#define _GH_PRIV_VM_MGR_H > + > +#include <linux/gunyah_rsc_mgr.h> > + > +#include <uapi/linux/gunyah.h> > + > +long gh_dev_vm_mgr_ioctl(struct gh_rm *rm, unsigned int cmd, unsigned long arg); > + > +struct gunyah_vm { > + u16 vmid; > + struct gh_rm_rpc *rm; > +}; > + > +#endif > diff --git a/include/linux/gunyah_rsc_mgr.h b/include/linux/gunyah_rsc_mgr.h > index be0bce5507b1..9a9a037b349a 100644 > --- a/include/linux/gunyah_rsc_mgr.h > +++ b/include/linux/gunyah_rsc_mgr.h > @@ -17,6 +17,9 @@ > > struct gh_rm; > > +void get_gh_rm(struct gh_rm *rm); > +void put_gh_rm(struct gh_rm *rm); > + > enum gh_rm_vm_status { > GH_RM_VM_STATUS_NO_STATE = 0, > GH_RM_VM_STATUS_INIT = 1, > diff --git a/include/uapi/linux/gunyah.h b/include/uapi/linux/gunyah.h > new file mode 100644 > index 000000000000..88a40d6e0b96 > --- /dev/null > +++ b/include/uapi/linux/gunyah.h > @@ -0,0 +1,23 @@ > +/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */ > +/* > + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. > + */ > + > +#ifndef _UAPI_LINUX_GUNYAH > +#define _UAPI_LINUX_GUNYAH > + > +/* > + * Userspace interface for /dev/gunyah - gunyah based virtual machine > + */ > + > +#include <linux/types.h> > +#include <linux/ioctl.h> > + > +#define GH_IOCTL_TYPE 'G' > + > +/* > + * ioctls for /dev/gunyah fds: > + */ > +#define GH_CREATE_VM _IO(GH_IOCTL_TYPE, 0x0) /* Returns a Gunyah VM fd */ > + > +#endif
On 2/2/2023 4:54 AM, Srinivas Kandagatla wrote: > > > On 20/01/2023 22:46, Elliot Berman wrote: >> Gunyah VM manager is a kernel moduel which exposes an interface to >> Gunyah userspace to load, run, and interact with other Gunyah virtual >> machines. The interface is a character device at /dev/gunyah. >> >> Add a basic VM manager driver. Upcoming patches will add more ioctls >> into this driver. >> >> Co-developed-by: Prakruthi Deepak Heragu <quic_pheragu@quicinc.com> >> Signed-off-by: Prakruthi Deepak Heragu <quic_pheragu@quicinc.com> >> Signed-off-by: Elliot Berman <quic_eberman@quicinc.com> >> --- >> .../userspace-api/ioctl/ioctl-number.rst | 1 + >> drivers/virt/gunyah/Makefile | 2 +- >> drivers/virt/gunyah/rsc_mgr.c | 51 +++++++- >> drivers/virt/gunyah/vm_mgr.c | 117 ++++++++++++++++++ >> drivers/virt/gunyah/vm_mgr.h | 20 +++ >> include/linux/gunyah_rsc_mgr.h | 3 + >> include/uapi/linux/gunyah.h | 23 ++++ >> 7 files changed, 215 insertions(+), 2 deletions(-) >> create mode 100644 drivers/virt/gunyah/vm_mgr.c >> create mode 100644 drivers/virt/gunyah/vm_mgr.h >> create mode 100644 include/uapi/linux/gunyah.h >> >> diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst >> b/Documentation/userspace-api/ioctl/ioctl-number.rst >> index eb045fc495a4..8696dc3cdd83 100644 >> --- a/Documentation/userspace-api/ioctl/ioctl-number.rst >> +++ b/Documentation/userspace-api/ioctl/ioctl-number.rst >> @@ -137,6 +137,7 @@ Code Seq# Include >> File Comments >> 'F' DD video/sstfb.h >> conflict! >> 'G' 00-3F drivers/misc/sgi-gru/grulib.h >> conflict! >> 'G' 00-0F xen/gntalloc.h, xen/gntdev.h >> conflict! >> +'G' 00-0f linux/gunyah.h >> conflict! >> 'H' 00-7F linux/hiddev.h >> conflict! >> 'H' 00-0F linux/hidraw.h >> conflict! >> 'H' 01 linux/mei.h >> conflict! >> diff --git a/drivers/virt/gunyah/Makefile b/drivers/virt/gunyah/Makefile >> index de29769f2f3f..03951cf82023 100644 >> --- a/drivers/virt/gunyah/Makefile >> +++ b/drivers/virt/gunyah/Makefile >> @@ -2,5 +2,5 @@ >> obj-$(CONFIG_GUNYAH) += gunyah.o >> -gunyah_rsc_mgr-y += rsc_mgr.o rsc_mgr_rpc.o >> +gunyah_rsc_mgr-y += rsc_mgr.o rsc_mgr_rpc.o vm_mgr.o >> obj-$(CONFIG_GUNYAH) += gunyah_rsc_mgr.o >> diff --git a/drivers/virt/gunyah/rsc_mgr.c >> b/drivers/virt/gunyah/rsc_mgr.c >> index 382f9943fd31..95f4aa928aaf 100644 >> --- a/drivers/virt/gunyah/rsc_mgr.c >> +++ b/drivers/virt/gunyah/rsc_mgr.c >> @@ -16,8 +16,10 @@ >> #include <linux/completion.h> >> #include <linux/gunyah_rsc_mgr.h> >> #include <linux/platform_device.h> >> +#include <linux/miscdevice.h> >> #include "rsc_mgr.h" >> +#include "vm_mgr.h" >> #define RM_RPC_API_VERSION_MASK GENMASK(3, 0) >> #define RM_RPC_HEADER_WORDS_MASK GENMASK(7, 4) >> @@ -105,6 +107,7 @@ struct gh_rm { >> struct kmem_cache *cache; >> struct mutex send_lock; >> + struct miscdevice miscdev; >> struct work_struct recv_work; >> }; >> @@ -526,6 +529,33 @@ int gh_rm_call(struct gh_rm *rm, u32 message_id, >> void *req_buff, size_t req_buff >> return ret; >> } >> +void get_gh_rm(struct gh_rm *rm) >> +{ >> + get_device(rm->dev); >> +} >> +EXPORT_SYMBOL_GPL(get_gh_rm); > > We have 4/5 different vairants of exported symbols now. > > EXPORT_SYMBOL_GPL(gunyah_vm_function_unregister); > EXPORT_SYMBOL_GPL(ghvm_add_resource_ticket); > EXPORT_SYMBOL_GPL(gh_vm_mgr_mmio_write); > EXPORT_SYMBOL_GPL(put_gh_rm); > EXPORT_SYMBOL_GPL(get_gunyah_vm); > > I think this needs to be cleaned up for consistency reasons. > Cleaned up in the v10. "gh_vm_" will be the prefix. >> + >> +void put_gh_rm(struct gh_rm *rm) >> +{ >> + put_device(rm->dev); >> +} >> +EXPORT_SYMBOL_GPL(put_gh_rm); >> + >> +static long gh_dev_ioctl(struct file *filp, unsigned int cmd, >> unsigned long arg) >> +{ >> + struct miscdevice *miscdev = filp->private_data; >> + struct gh_rm *rm = container_of(miscdev, struct gh_rm, miscdev); >> + >> + return gh_dev_vm_mgr_ioctl(rm, cmd, arg); >> +} >> + >> +static const struct file_operations gh_dev_fops = { >> + .owner = THIS_MODULE, >> + .unlocked_ioctl = gh_dev_ioctl, >> + .compat_ioctl = compat_ptr_ioctl, >> + .llseek = noop_llseek, >> +}; >> + >> static int gh_msgq_platform_probe_direction(struct platform_device >> *pdev, >> bool tx, int idx, struct gunyah_resource *ghrsc) >> { >> @@ -582,13 +612,32 @@ static int gh_rm_drv_probe(struct >> platform_device *pdev) >> rm->msgq_client.rx_callback = gh_rm_msgq_rx_data; >> rm->msgq_client.tx_done = gh_rm_msgq_tx_done; >> - return gh_msgq_init(&pdev->dev, &rm->msgq, &rm->msgq_client, >> &rm->tx_ghrsc, &rm->rx_ghrsc); >> + ret = gh_msgq_init(&pdev->dev, &rm->msgq, &rm->msgq_client, >> &rm->tx_ghrsc, &rm->rx_ghrsc); >> + if (ret) >> + goto err_cache; >> + >> + rm->miscdev.name = "gunyah"; >> + rm->miscdev.minor = MISC_DYNAMIC_MINOR; >> + rm->miscdev.fops = &gh_dev_fops; >> + >> + ret = misc_register(&rm->miscdev); >> + if (ret) >> + goto err_msgq; >> + >> + return 0; >> +err_msgq: >> + mbox_free_channel(gh_msgq_chan(&rm->msgq)); >> + gh_msgq_remove(&rm->msgq); >> +err_cache: >> + kmem_cache_destroy(rm->cache); >> + return ret; >> } >> static int gh_rm_drv_remove(struct platform_device *pdev) >> { >> struct gh_rm *rm = platform_get_drvdata(pdev); >> + misc_deregister(&rm->miscdev); >> mbox_free_channel(gh_msgq_chan(&rm->msgq)); >> gh_msgq_remove(&rm->msgq); >> kmem_cache_destroy(rm->cache); >> diff --git a/drivers/virt/gunyah/vm_mgr.c b/drivers/virt/gunyah/vm_mgr.c >> new file mode 100644 >> index 000000000000..0864dbd77e28 >> --- /dev/null >> +++ b/drivers/virt/gunyah/vm_mgr.c >> @@ -0,0 +1,117 @@ >> +// SPDX-License-Identifier: GPL-2.0-only >> +/* >> + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All >> rights reserved. >> + */ >> + >> +#define pr_fmt(fmt) "gh_vm_mgr: " fmt >> + >> +#include <linux/anon_inodes.h> >> +#include <linux/file.h> >> +#include <linux/gunyah_rsc_mgr.h> >> +#include <linux/miscdevice.h> >> +#include <linux/module.h> >> + >> +#include <uapi/linux/gunyah.h> >> + >> +#include "vm_mgr.h" >> + >> +static __must_check struct gunyah_vm *gunyah_vm_alloc(struct >> gh_rm_rpc *rm) >> +{ >> + struct gunyah_vm *ghvm; >> + int vmid; >> + >> + vmid = gh_rm_alloc_vmid(rm, 0); >> + if (vmid < 0) >> + return ERR_PTR(vmid); >> + >> + ghvm = kzalloc(sizeof(*ghvm), GFP_KERNEL); >> + if (!ghvm) { >> + gh_rm_dealloc_vmid(rm, vmid); >> + return ghvm; > > return ERR_PTR(-ENOMEM); > Done. >> + } >> + >> + get_gh_rm(rm); >> + >> + ghvm->vmid = vmid; >> + ghvm->rm = rm; >> + >> + return ghvm; >> +} >> + >> +static long gh_vm_ioctl(struct file *filp, unsigned int cmd, unsigned >> long arg) >> +{ >> + long r; >> + >> + switch (cmd) { >> + default: >> + r = -ENOTTY; >> + break; >> + } > > this function looks like dummy, why do we need this in this patch? > Refactored the patches to introduce when first ioctl is added. >> + >> + return r; >> +} >> + >> +static int gh_vm_release(struct inode *inode, struct file *filp) >> +{ >> + struct gunyah_vm *ghvm = filp->private_data; >> + >> + put_gh_rm(ghvm->rm); >> + kfree(ghvm); >> + return 0; >> +} >> + >> +static const struct file_operations gh_vm_fops = { >> + .unlocked_ioctl = gh_vm_ioctl, >> + .release = gh_vm_release, >> + .compat_ioctl = compat_ptr_ioctl, >> + .llseek = noop_llseek, >> +}; >> + >> +static long gh_dev_ioctl_create_vm(struct gh_rm *rm, unsigned long arg) >> +{ >> + struct gunyah_vm *ghvm; >> + struct file *file; >> + int fd, err; >> + >> + /* arg reserved for future use. */ >> + if (arg) >> + return -EINVAL; > > Bit confused here, GH_CREATE_VM IOCTL does not take any arguments so why > is this arg reserved for future use. Are you going to change the ABI for > GH_CREATE_VM? > KVM uses the argument for architecture-specific VM flags. This series only adds support for the "unauthenticated VM" type. I was thinking it might be convenient to use this field to mux between the different authentication types (zero would always mean "unauthenticated VM"). I've not given a lot of thought to exact mechanics, but if I want to use in the future, I think it should be reserved today to ensure there's no backwards compatibility issues. > >> + >> + ghvm = gunyah_vm_alloc(rm); >> + if (IS_ERR_OR_NULL(ghvm)) >> + return PTR_ERR(ghvm) ? : -ENOMEM; >> + >> + fd = get_unused_fd_flags(O_CLOEXEC); >> + if (fd < 0) { >> + err = fd; >> + goto err_destroy_vm; >> + } >> + >> + file = anon_inode_getfile("gunyah-vm", &gh_vm_fops, ghvm, O_RDWR); >> + if (IS_ERR(file)) { >> + err = PTR_ERR(file); >> + goto err_put_fd; >> + } >> + >> + fd_install(fd, file); >> + >> + return fd; >> + >> +err_put_fd: >> + put_unused_fd(fd); >> +err_destroy_vm: >> + kfree(ghvm); >> + return err; >> +} >> + >> +long gh_dev_vm_mgr_ioctl(struct gh_rm *rm, unsigned int cmd, unsigned >> long arg) >> +{ >> + switch (cmd) { >> + case GH_CREATE_VM: >> + return gh_dev_ioctl_create_vm(rm, arg); >> + default: >> + return -ENOIOCTLCMD; >> + } >> +} >> +EXPORT_SYMBOL_GPL(gh_dev_vm_mgr_ioctl); >> + >> diff --git a/drivers/virt/gunyah/vm_mgr.h b/drivers/virt/gunyah/vm_mgr.h >> new file mode 100644 >> index 000000000000..e47f34de7f9e >> --- /dev/null >> +++ b/drivers/virt/gunyah/vm_mgr.h >> @@ -0,0 +1,20 @@ >> +/* SPDX-License-Identifier: GPL-2.0-only */ >> +/* >> + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All >> rights reserved. >> + */ >> + >> +#ifndef _GH_PRIV_VM_MGR_H >> +#define _GH_PRIV_VM_MGR_H >> + >> +#include <linux/gunyah_rsc_mgr.h> >> + >> +#include <uapi/linux/gunyah.h> >> + >> +long gh_dev_vm_mgr_ioctl(struct gh_rm *rm, unsigned int cmd, unsigned >> long arg); >> + >> +struct gunyah_vm { >> + u16 vmid; >> + struct gh_rm_rpc *rm; >> +}; >> + >> +#endif >> diff --git a/include/linux/gunyah_rsc_mgr.h >> b/include/linux/gunyah_rsc_mgr.h >> index be0bce5507b1..9a9a037b349a 100644 >> --- a/include/linux/gunyah_rsc_mgr.h >> +++ b/include/linux/gunyah_rsc_mgr.h >> @@ -17,6 +17,9 @@ >> struct gh_rm; >> +void get_gh_rm(struct gh_rm *rm); >> +void put_gh_rm(struct gh_rm *rm); >> + >> enum gh_rm_vm_status { >> GH_RM_VM_STATUS_NO_STATE = 0, >> GH_RM_VM_STATUS_INIT = 1, >> diff --git a/include/uapi/linux/gunyah.h b/include/uapi/linux/gunyah.h >> new file mode 100644 >> index 000000000000..88a40d6e0b96 >> --- /dev/null >> +++ b/include/uapi/linux/gunyah.h >> @@ -0,0 +1,23 @@ >> +/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */ >> +/* >> + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights >> reserved. >> + */ >> + >> +#ifndef _UAPI_LINUX_GUNYAH >> +#define _UAPI_LINUX_GUNYAH >> + >> +/* >> + * Userspace interface for /dev/gunyah - gunyah based virtual machine >> + */ >> + >> +#include <linux/types.h> >> +#include <linux/ioctl.h> >> + >> +#define GH_IOCTL_TYPE 'G' >> + >> +/* >> + * ioctls for /dev/gunyah fds: >> + */ >> +#define GH_CREATE_VM _IO(GH_IOCTL_TYPE, 0x0) /* Returns a >> Gunyah VM fd */ >> + >> +#endif
diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst index eb045fc495a4..8696dc3cdd83 100644 --- a/Documentation/userspace-api/ioctl/ioctl-number.rst +++ b/Documentation/userspace-api/ioctl/ioctl-number.rst @@ -137,6 +137,7 @@ Code Seq# Include File Comments 'F' DD video/sstfb.h conflict! 'G' 00-3F drivers/misc/sgi-gru/grulib.h conflict! 'G' 00-0F xen/gntalloc.h, xen/gntdev.h conflict! +'G' 00-0f linux/gunyah.h conflict! 'H' 00-7F linux/hiddev.h conflict! 'H' 00-0F linux/hidraw.h conflict! 'H' 01 linux/mei.h conflict! diff --git a/drivers/virt/gunyah/Makefile b/drivers/virt/gunyah/Makefile index de29769f2f3f..03951cf82023 100644 --- a/drivers/virt/gunyah/Makefile +++ b/drivers/virt/gunyah/Makefile @@ -2,5 +2,5 @@ obj-$(CONFIG_GUNYAH) += gunyah.o -gunyah_rsc_mgr-y += rsc_mgr.o rsc_mgr_rpc.o +gunyah_rsc_mgr-y += rsc_mgr.o rsc_mgr_rpc.o vm_mgr.o obj-$(CONFIG_GUNYAH) += gunyah_rsc_mgr.o diff --git a/drivers/virt/gunyah/rsc_mgr.c b/drivers/virt/gunyah/rsc_mgr.c index 382f9943fd31..95f4aa928aaf 100644 --- a/drivers/virt/gunyah/rsc_mgr.c +++ b/drivers/virt/gunyah/rsc_mgr.c @@ -16,8 +16,10 @@ #include <linux/completion.h> #include <linux/gunyah_rsc_mgr.h> #include <linux/platform_device.h> +#include <linux/miscdevice.h> #include "rsc_mgr.h" +#include "vm_mgr.h" #define RM_RPC_API_VERSION_MASK GENMASK(3, 0) #define RM_RPC_HEADER_WORDS_MASK GENMASK(7, 4) @@ -105,6 +107,7 @@ struct gh_rm { struct kmem_cache *cache; struct mutex send_lock; + struct miscdevice miscdev; struct work_struct recv_work; }; @@ -526,6 +529,33 @@ int gh_rm_call(struct gh_rm *rm, u32 message_id, void *req_buff, size_t req_buff return ret; } +void get_gh_rm(struct gh_rm *rm) +{ + get_device(rm->dev); +} +EXPORT_SYMBOL_GPL(get_gh_rm); + +void put_gh_rm(struct gh_rm *rm) +{ + put_device(rm->dev); +} +EXPORT_SYMBOL_GPL(put_gh_rm); + +static long gh_dev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + struct miscdevice *miscdev = filp->private_data; + struct gh_rm *rm = container_of(miscdev, struct gh_rm, miscdev); + + return gh_dev_vm_mgr_ioctl(rm, cmd, arg); +} + +static const struct file_operations gh_dev_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = gh_dev_ioctl, + .compat_ioctl = compat_ptr_ioctl, + .llseek = noop_llseek, +}; + static int gh_msgq_platform_probe_direction(struct platform_device *pdev, bool tx, int idx, struct gunyah_resource *ghrsc) { @@ -582,13 +612,32 @@ static int gh_rm_drv_probe(struct platform_device *pdev) rm->msgq_client.rx_callback = gh_rm_msgq_rx_data; rm->msgq_client.tx_done = gh_rm_msgq_tx_done; - return gh_msgq_init(&pdev->dev, &rm->msgq, &rm->msgq_client, &rm->tx_ghrsc, &rm->rx_ghrsc); + ret = gh_msgq_init(&pdev->dev, &rm->msgq, &rm->msgq_client, &rm->tx_ghrsc, &rm->rx_ghrsc); + if (ret) + goto err_cache; + + rm->miscdev.name = "gunyah"; + rm->miscdev.minor = MISC_DYNAMIC_MINOR; + rm->miscdev.fops = &gh_dev_fops; + + ret = misc_register(&rm->miscdev); + if (ret) + goto err_msgq; + + return 0; +err_msgq: + mbox_free_channel(gh_msgq_chan(&rm->msgq)); + gh_msgq_remove(&rm->msgq); +err_cache: + kmem_cache_destroy(rm->cache); + return ret; } static int gh_rm_drv_remove(struct platform_device *pdev) { struct gh_rm *rm = platform_get_drvdata(pdev); + misc_deregister(&rm->miscdev); mbox_free_channel(gh_msgq_chan(&rm->msgq)); gh_msgq_remove(&rm->msgq); kmem_cache_destroy(rm->cache); diff --git a/drivers/virt/gunyah/vm_mgr.c b/drivers/virt/gunyah/vm_mgr.c new file mode 100644 index 000000000000..0864dbd77e28 --- /dev/null +++ b/drivers/virt/gunyah/vm_mgr.c @@ -0,0 +1,117 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#define pr_fmt(fmt) "gh_vm_mgr: " fmt + +#include <linux/anon_inodes.h> +#include <linux/file.h> +#include <linux/gunyah_rsc_mgr.h> +#include <linux/miscdevice.h> +#include <linux/module.h> + +#include <uapi/linux/gunyah.h> + +#include "vm_mgr.h" + +static __must_check struct gunyah_vm *gunyah_vm_alloc(struct gh_rm_rpc *rm) +{ + struct gunyah_vm *ghvm; + int vmid; + + vmid = gh_rm_alloc_vmid(rm, 0); + if (vmid < 0) + return ERR_PTR(vmid); + + ghvm = kzalloc(sizeof(*ghvm), GFP_KERNEL); + if (!ghvm) { + gh_rm_dealloc_vmid(rm, vmid); + return ghvm; + } + + get_gh_rm(rm); + + ghvm->vmid = vmid; + ghvm->rm = rm; + + return ghvm; +} + +static long gh_vm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + long r; + + switch (cmd) { + default: + r = -ENOTTY; + break; + } + + return r; +} + +static int gh_vm_release(struct inode *inode, struct file *filp) +{ + struct gunyah_vm *ghvm = filp->private_data; + + put_gh_rm(ghvm->rm); + kfree(ghvm); + return 0; +} + +static const struct file_operations gh_vm_fops = { + .unlocked_ioctl = gh_vm_ioctl, + .release = gh_vm_release, + .compat_ioctl = compat_ptr_ioctl, + .llseek = noop_llseek, +}; + +static long gh_dev_ioctl_create_vm(struct gh_rm *rm, unsigned long arg) +{ + struct gunyah_vm *ghvm; + struct file *file; + int fd, err; + + /* arg reserved for future use. */ + if (arg) + return -EINVAL; + + ghvm = gunyah_vm_alloc(rm); + if (IS_ERR_OR_NULL(ghvm)) + return PTR_ERR(ghvm) ? : -ENOMEM; + + fd = get_unused_fd_flags(O_CLOEXEC); + if (fd < 0) { + err = fd; + goto err_destroy_vm; + } + + file = anon_inode_getfile("gunyah-vm", &gh_vm_fops, ghvm, O_RDWR); + if (IS_ERR(file)) { + err = PTR_ERR(file); + goto err_put_fd; + } + + fd_install(fd, file); + + return fd; + +err_put_fd: + put_unused_fd(fd); +err_destroy_vm: + kfree(ghvm); + return err; +} + +long gh_dev_vm_mgr_ioctl(struct gh_rm *rm, unsigned int cmd, unsigned long arg) +{ + switch (cmd) { + case GH_CREATE_VM: + return gh_dev_ioctl_create_vm(rm, arg); + default: + return -ENOIOCTLCMD; + } +} +EXPORT_SYMBOL_GPL(gh_dev_vm_mgr_ioctl); + diff --git a/drivers/virt/gunyah/vm_mgr.h b/drivers/virt/gunyah/vm_mgr.h new file mode 100644 index 000000000000..e47f34de7f9e --- /dev/null +++ b/drivers/virt/gunyah/vm_mgr.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef _GH_PRIV_VM_MGR_H +#define _GH_PRIV_VM_MGR_H + +#include <linux/gunyah_rsc_mgr.h> + +#include <uapi/linux/gunyah.h> + +long gh_dev_vm_mgr_ioctl(struct gh_rm *rm, unsigned int cmd, unsigned long arg); + +struct gunyah_vm { + u16 vmid; + struct gh_rm_rpc *rm; +}; + +#endif diff --git a/include/linux/gunyah_rsc_mgr.h b/include/linux/gunyah_rsc_mgr.h index be0bce5507b1..9a9a037b349a 100644 --- a/include/linux/gunyah_rsc_mgr.h +++ b/include/linux/gunyah_rsc_mgr.h @@ -17,6 +17,9 @@ struct gh_rm; +void get_gh_rm(struct gh_rm *rm); +void put_gh_rm(struct gh_rm *rm); + enum gh_rm_vm_status { GH_RM_VM_STATUS_NO_STATE = 0, GH_RM_VM_STATUS_INIT = 1, diff --git a/include/uapi/linux/gunyah.h b/include/uapi/linux/gunyah.h new file mode 100644 index 000000000000..88a40d6e0b96 --- /dev/null +++ b/include/uapi/linux/gunyah.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */ +/* + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef _UAPI_LINUX_GUNYAH +#define _UAPI_LINUX_GUNYAH + +/* + * Userspace interface for /dev/gunyah - gunyah based virtual machine + */ + +#include <linux/types.h> +#include <linux/ioctl.h> + +#define GH_IOCTL_TYPE 'G' + +/* + * ioctls for /dev/gunyah fds: + */ +#define GH_CREATE_VM _IO(GH_IOCTL_TYPE, 0x0) /* Returns a Gunyah VM fd */ + +#endif