linux-kernel - [PATCH v4 0/2] kvm/arm64: Try stage2 block mapping for host device MMIO

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Message-ID: <20210415140328.24200-1-zhukeqian1@huawei.com>
Date:   Thu, 15 Apr 2021 22:03:26 +0800
From:   Keqian Zhu <zhukeqian1@...wei.com>
To:     <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <kvm@...r.kernel.org>,
        <kvmarm@...ts.cs.columbia.edu>, Marc Zyngier <maz@...nel.org>
CC:     <wanghaibin.wang@...wei.com>
Subject: [PATCH v4 0/2] kvm/arm64: Try stage2 block mapping for host device MMIO

Hi,

We have two pathes to build stage2 mapping for MMIO regions.

Create time's path and stage2 fault path.

Patch#1 removes the creation time's mapping of MMIO regions
Patch#2 tries stage2 block mapping for host device MMIO at fault path

Changelog:

v4:
 - use get_vma_page_shift() handle all cases. (Marc)
 - get rid of force_pte for device mapping. (Marc)

v3:
 - Do not need to check memslot boundary in device_rough_page_shift(). (Marc)

Thanks,
Keqian


Keqian Zhu (2):
  kvm/arm64: Remove the creation time's mapping of MMIO regions
  kvm/arm64: Try stage2 block mapping for host device MMIO

 arch/arm64/kvm/mmu.c | 99 ++++++++++++++++++++++++--------------------
 1 file changed, 54 insertions(+), 45 deletions(-)

-- 
2.19.1