[PATCH v2] docs: kvm: Fix KVM_KVMCLOCK_CTRL API doc

[PATCH v2] docs: kvm: Fix KVM_KVMCLOCK_CTRL API doc

[Joshua Abraham]

The KVM_KVMCLOCK_CTRL ioctl signals to supported KVM guests
that the hypervisor has paused it. Update the documentation to
reflect that the guest is notified by this API.

Signed-off-by: Joshua Abraham <sinisterpatrician@gmail.com>
---
Changes in v2:
    - Re-word documentation to be clearer. Also fix a small grammar
      error.

 Documentation/virt/kvm/api.rst | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index efbbe570aa9b..d2c1cbce1018 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -2572,13 +2572,15 @@ list in 4.68.
 :Parameters: None
 :Returns: 0 on success, -1 on error
 
-This signals to the host kernel that the specified guest is being paused by
-userspace.  The host will set a flag in the pvclock structure that is checked
-from the soft lockup watchdog.  The flag is part of the pvclock structure that
-is shared between guest and host, specifically the second bit of the flags
+This ioctl sets a flag accessible to the guest indicating that the specified
+vCPU has been paused by the host userspace.
+
+The host will set a flag in the pvclock structure that is checked from the
+soft lockup watchdog.  The flag is part of the pvclock structure that is
+shared between guest and host, specifically the second bit of the flags
 field of the pvclock_vcpu_time_info structure.  It will be set exclusively by
 the host and read/cleared exclusively by the guest.  The guest operation of
-checking and clearing the flag must an atomic operation so
+checking and clearing the flag must be an atomic operation so
 load-link/store-conditional, or equivalent must be used.  There are two cases
 where the guest will clear the flag: when the soft lockup watchdog timer resets
 itself or when a soft lockup is detected.  This ioctl can be called any time
-- 
2.17.1

Re: [PATCH v2] docs: kvm: Fix KVM_KVMCLOCK_CTRL API doc

[Jonathan Corbet]

On Fri, 1 May 2020 18:36:24 -0400
Joshua Abraham <j.abraham1776@gmail.com> wrote:

> The KVM_KVMCLOCK_CTRL ioctl signals to supported KVM guests
> that the hypervisor has paused it. Update the documentation to
> reflect that the guest is notified by this API.
> 
> Signed-off-by: Joshua Abraham <sinisterpatrician@gmail.com>
> ---
> Changes in v2:
>     - Re-word documentation to be clearer. Also fix a small grammar
>       error.
> 
>  Documentation/virt/kvm/api.rst | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)

Applied, thanks.

jon