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| author | Randy Dunlap <rdunlap@infradead.org> | 2023-06-10 07:43:10 +0200 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-06-19 12:09:54 +0200 |
| commit | 6f7f812f54b46da88ec6e98b4a10e501d0d7164c (patch) | |
| tree | 360b5fce48a9f3a6947f2deddf409fe96cd0696f /Documentation/virt/paravirt_ops.rst | |
| parent | x86/mm: Remove unused current_untag_mask() (diff) | |
| download | linux-6f7f812f54b46da88ec6e98b4a10e501d0d7164c.tar.xz linux-6f7f812f54b46da88ec6e98b4a10e501d0d7164c.zip | |
Documentation: virt: Clean up paravirt_ops doc
Clarify language. Clean up grammar. Hyphenate some words.
Change "low-ops" to "low-level" since "low-ops" isn't defined or even
mentioned anywhere else in the kernel source tree.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20230610054310.6242-1-rdunlap@infradead.org
Diffstat (limited to 'Documentation/virt/paravirt_ops.rst')
| -rw-r--r-- | Documentation/virt/paravirt_ops.rst | 16 |
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. |