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fw_cfg, vhost: features fixes

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This cleans up the qemu fw cfg device driver.
 On top of this, vmcore is dumped there on crash to
 help debugging witH kASLR enabled.
 Also included are some fixes in vhost.
 
 Signed-off-by: Michael S. Tsirkin <[email protected]>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull fw_cfg, vhost updates from Michael Tsirkin:
 "This cleans up the qemu fw cfg device driver.

  On top of this, vmcore is dumped there on crash to help debugging
  with kASLR enabled.

  Also included are some fixes in vhost"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vhost: add vsock compat ioctl
  vhost: fix vhost ioctl signature to build with clang
  fw_cfg: write vmcoreinfo details
  crash: export paddr_vmcoreinfo_note()
  fw_cfg: add DMA register
  fw_cfg: add a public uapi header
  fw_cfg: handle fw_cfg_read_blob() error
  fw_cfg: remove inline from fw_cfg_read_blob()
  fw_cfg: fix sparse warnings around FW_CFG_FILE_DIR read
  fw_cfg: fix sparse warning reading FW_CFG_ID
  fw_cfg: fix sparse warnings with fw_cfg_file
  fw_cfg: fix sparse warnings in fw_cfg_sel_endianness()
  ptr_ring: fix build
This commit is contained in:
Linus Torvalds 2018-04-06 19:21:41 -07:00
commit 016c6f25d1
8 changed files with 348 additions and 64 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/vhost/vhost.c
View file

@ -1334,7 +1334,7 @@ err:
return -EFAULT;
}
long vhost_vring_ioctl(struct vhost_dev *d, int ioctl, void __user *argp)
long vhost_vring_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp)
{
struct file *eventfp, *filep = NULL;
bool pollstart = false, pollstop = false;

4
drivers/vhost/vhost.h
View file

@ -45,7 +45,7 @@ void vhost_poll_stop(struct vhost_poll *poll);
void vhost_poll_flush(struct vhost_poll *poll);
void vhost_poll_queue(struct vhost_poll *poll);
void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work);
long vhost_vring_ioctl(struct vhost_dev *d, int ioctl, void __user *argp);
long vhost_vring_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp);
struct vhost_log {
u64 addr;
@ -177,7 +177,7 @@ void vhost_dev_reset_owner(struct vhost_dev *, struct vhost_umem *);
void vhost_dev_cleanup(struct vhost_dev *);
void vhost_dev_stop(struct vhost_dev *);
long vhost_dev_ioctl(struct vhost_dev *, unsigned int ioctl, void __user *argp);
long vhost_vring_ioctl(struct vhost_dev *d, int ioctl, void __user *argp);
long vhost_vring_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp);
int vhost_vq_access_ok(struct vhost_virtqueue *vq);
int vhost_log_access_ok(struct vhost_dev *);

11
drivers/vhost/vsock.c
View file

@ -699,12 +699,23 @@ static long vhost_vsock_dev_ioctl(struct file *f, unsigned int ioctl,
}
}
#ifdef CONFIG_COMPAT
static long vhost_vsock_dev_compat_ioctl(struct file *f, unsigned int ioctl,
unsigned long arg)
{
return vhost_vsock_dev_ioctl(f, ioctl, (unsigned long)compat_ptr(arg));
}
#endif
static const struct file_operations vhost_vsock_fops = {
.owner = THIS_MODULE,
.open = vhost_vsock_dev_open,
.release = vhost_vsock_dev_release,
.llseek = noop_llseek,
.unlocked_ioctl = vhost_vsock_dev_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = vhost_vsock_dev_compat_ioctl,
#endif
};
static struct miscdevice vhost_vsock_misc = {