summaryrefslogtreecommitdiff
path: root/Documentation/virt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/virt')
-rw-r--r--Documentation/virt/paravirt_ops.rst16
1 files changed, 8 insertions, 8 deletions
diff --git a/Documentation/virt/paravirt_ops.rst b/Documentation/virt/paravirt_ops.rst
index 6b789d27cead..62d867e0d4d6 100644
--- a/Documentation/virt/paravirt_ops.rst
+++ b/Documentation/virt/paravirt_ops.rst
@@ -5,31 +5,31 @@ Paravirt_ops
============
Linux provides support for different hypervisor virtualization technologies.
-Historically different binary kernels would be required in order to support
-different hypervisors, this restriction was removed with pv_ops.
+Historically, different binary kernels would be required in order to support
+different hypervisors; this restriction was removed with pv_ops.
Linux pv_ops is a virtualization API which enables support for different
hypervisors. It allows each hypervisor to override critical operations and
allows a single kernel binary to run on all supported execution environments
including native machine -- without any hypervisors.
pv_ops provides a set of function pointers which represent operations
-corresponding to low level critical instructions and high level
-functionalities in various areas. pv-ops allows for optimizations at run
-time by enabling binary patching of the low-ops critical operations
+corresponding to low-level critical instructions and high-level
+functionalities in various areas. pv_ops allows for optimizations at run
+time by enabling binary patching of the low-level critical operations
at boot time.
pv_ops operations are classified into three categories:
- simple indirect call
- These operations correspond to high level functionality where it is
+ These operations correspond to high-level functionality where it is
known that the overhead of indirect call isn't very important.
- indirect call which allows optimization with binary patch
- Usually these operations correspond to low level critical instructions. They
+ Usually these operations correspond to low-level critical instructions. They
are called frequently and are performance critical. The overhead is
very important.
- a set of macros for hand written assembly code
Hand written assembly codes (.S files) also need paravirtualization
- because they include sensitive instructions or some of code paths in
+ because they include sensitive instructions or some code paths in
them are very performance critical.