linux-kernel - [PATCH 0/2] Fix uio_hv_generic on 64k page systems

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Message-Id: <1744936997-7844-1-git-send-email-longli@linuxonhyperv.com>
Date: Thu, 17 Apr 2025 17:43:15 -0700
From: longli@...uxonhyperv.com
To: "K. Y. Srinivasan" <kys@...rosoft.com>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	Wei Liu <wei.liu@...nel.org>,
	Dexuan Cui <decui@...rosoft.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-hyperv@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Long Li <longli@...rosoft.com>
Subject: [PATCH 0/2] Fix uio_hv_generic on 64k page systems

From: Long Li <longli@...rosoft.com>

UIO framework requires the device memory aligned to page boundary.
Hyper-V may allocate some memory that is Hyper-V page aligned (4k)
but not system page aligned.

Fix this by having Hyper-V always allocate those pages on system page
boundary and expose them to user-mode.

Long Li (2):
  Drivers: hv: Allocate interrupt and monitor pages aligned to system
    page boundary
  uio_hv_generic: Use correct size for interrupt and monitor pages

 drivers/hv/hv_common.c       | 29 +++++++----------------------
 drivers/uio/uio_hv_generic.c |  4 ++--
 2 files changed, 9 insertions(+), 24 deletions(-)

-- 
2.34.1