LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Maya Nakamura <m.maya.nakamura@gmail.com>
To: mikelley@microsoft.com, kys@microsoft.com,
	haiyangz@microsoft.com, sthemmin@microsoft.com,
	sashal@kernel.org
Cc: x86@kernel.org, linux-hyperv@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 0/6] hv: Remove dependencies on guest page size
Date: Fri, 5 Apr 2019 01:11:36 +0000	[thread overview]
Message-ID: <cover.1554426039.git.m.maya.nakamura@gmail.com> (raw)

The Linux guest page size and hypervisor page size concepts are
different, even though they happen to be the same value on x86. Hyper-V
code mixes up the two, so this patchset begins to address that by
creating and using a set of Hyper-V specific page definitions.

A major benefit of those new definitions is that they support non-x86
architectures, such as ARM64, that use different page sizes. On ARM64,
the guest page size may not be 4096, and Hyper-V always runs with a page
size of 4096.

In this patchset, the first two patches lay the foundation for the
others, creating definitions and preparing for memory allocations of
Hyper-V pages. Subsequent patches apply the definitions where the guest
VM and Hyper-V communicate, and where the code intends to use the
Hyper-V page size. The last two patches set the ring buffer size to a
fixed value, removing the dependencies on the guest page size.

This is the initial set of changes to the Hyper-V code, and future
patches will make additional changes using the same foundation, for
example, replace __vmalloc() and related functions when Hyper-V pages
are intended.

Maya Nakamura (6):
  x86: hv: hyperv-tlfs.h: Create and use Hyper-V page definitions
  x86: hv: hv_init.c: Replace alloc_page() with kmem_cache_alloc()
  hv: vmbus: Replace page definition with Hyper-V specific one
  x86: hv: mmu.c: Replace page definitions with Hyper-V specific ones
  HID: hv: Remove dependencies on PAGE_SIZE for ring buffer
  Input: hv: Remove dependencies on PAGE_SIZE for ring buffer

 arch/x86/hyperv/hv_init.c             | 38 +++++++++++++++++++--------
 arch/x86/hyperv/mmu.c                 | 15 ++++++-----
 arch/x86/include/asm/hyperv-tlfs.h    | 12 ++++++++-
 drivers/hid/hid-hyperv.c              |  4 +--
 drivers/hv/hyperv_vmbus.h             |  8 +++---
 drivers/input/serio/hyperv-keyboard.c |  4 +--
 6 files changed, 54 insertions(+), 27 deletions(-)

-- 
2.17.1


             reply	other threads:[~2019-04-05  1:11 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-05  1:11 Maya Nakamura [this message]
2019-04-05  1:13 ` [PATCH 1/6] x86: hv: hyperv-tlfs.h: Create and use Hyper-V page definitions Maya Nakamura
2019-04-05  1:14 ` [PATCH 2/6] x86: hv: hv_init.c: Replace alloc_page() with kmem_cache_alloc() Maya Nakamura
2019-04-05 11:31   ` Vitaly Kuznetsov
2019-04-12  7:24     ` Maya Nakamura
2019-04-12  7:52       ` Vitaly Kuznetsov
2019-05-08  6:46         ` Maya Nakamura
2019-05-08 14:54           ` Vitaly Kuznetsov
     [not found]             ` <BYAPR21MB1317AC7CA4B242106FCAD698CC320@BYAPR21MB1317.namprd21.prod.outlook.com>
2019-05-08 19:53               ` Vitaly Kuznetsov
     [not found]             ` <MN2PR21MB1232C6ABA5DAC847C8A910E1D70C0@MN2PR21MB1232.namprd21.prod.outlook.com>
2019-05-10 13:21               ` Vitaly Kuznetsov
     [not found]                 ` <BYAPR21MB1221962ED2DD7FEE19E7DAB6D70C0@BYAPR21MB1221.namprd21.prod.outlook.com>
2019-05-10 17:45                   ` Vitaly Kuznetsov
2019-04-05  1:16 ` [PATCH 3/6] hv: vmbus: Replace page definition with Hyper-V specific one Maya Nakamura
2019-04-05  1:17 ` [PATCH 4/6] x86: hv: mmu.c: Replace page definitions with Hyper-V specific ones Maya Nakamura
2019-04-05 11:10   ` Vitaly Kuznetsov
     [not found]     ` <DM5PR2101MB091843B6DD7A11C2C27917F1D7280@DM5PR2101MB0918.namprd21.prod.outlook.com>
2019-04-12  6:58       ` Vitaly Kuznetsov
2019-04-05  1:19 ` [PATCH 5/6] HID: hv: Remove dependencies on PAGE_SIZE for ring buffer Maya Nakamura
2019-04-05  1:20 ` [PATCH 6/6] Input: " Maya Nakamura

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=cover.1554426039.git.m.maya.nakamura@gmail.com \
    --to=m.maya.nakamura@gmail.com \
    --cc=haiyangz@microsoft.com \
    --cc=kys@microsoft.com \
    --cc=linux-hyperv@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mikelley@microsoft.com \
    --cc=sashal@kernel.org \
    --cc=sthemmin@microsoft.com \
    --cc=x86@kernel.org \
    --subject='Re: [PATCH 0/6] hv: Remove dependencies on guest page size' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).