From: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
To: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
LKML <linux-kernel@vger.kernel.org>, KVM <kvm@vger.kernel.org>
Subject: [PATCH 00/10 v4] KVM: introduce readonly memslot
Date: Tue, 17 Jul 2012 22:39:23 +0800 [thread overview]
Message-ID: <5005791B.8040807@linux.vnet.ibm.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 653 bytes --]
In current code, if we map a readonly memory space from host to guest
and the page is not currently mapped in the host, we will get a fault-pfn
and async is not allowed, then the vm will crash.
As Avi's suggestion, We introduce readonly memory region to map ROM/ROMD
to the guest, read access is happy for readonly memslot, write access on
readonly memslot will cause KVM_EXIT_MMIO exit.
The test case attached is used to test this feather.
Changlog:
- fix memslot flag check
- fix caching the mmio info into spte which is caused by write on readonly
memslot
- extend mmio-exit info to indicate whether the mmio-exit is caused by
readonly fault
[-- Attachment #2: migrate-perf.tar.bz2 --]
[-- Type: application/x-bzip, Size: 305078 bytes --]
next reply other threads:[~2012-07-17 14:39 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-17 14:39 Xiao Guangrong [this message]
2012-07-17 14:40 ` [PATCH 01/10] KVM: fix missing check for memslot flags Xiao Guangrong
2012-07-17 14:41 ` [PATCH 02/10] KVM: hide KVM_MEMSLOT_INVALID from userspace Xiao Guangrong
2012-07-17 14:41 ` [PATCH 03/10] KVM: introduce gfn_to_pfn_memslot_atomic Xiao Guangrong
2012-07-17 14:42 ` [PATCH 04/10] KVM: introduce gfn_to_hva_read/kvm_read_hva/kvm_read_hva_atomic Xiao Guangrong
2012-07-17 14:43 ` [PATCH 05/10] KVM: reorganize hva_to_pfn Xiao Guangrong
2012-07-17 14:43 ` [PATCH 06/10] KVM: use 'writable' as a hint to map writable pfn Xiao Guangrong
2012-07-17 14:44 ` [PATCH 07/10] KVM: introduce readonly_fault_pfn Xiao Guangrong
2012-07-19 10:15 ` Avi Kivity
2012-07-20 2:56 ` Xiao Guangrong
2012-07-17 14:45 ` [PATCH 08/10] KVM: introduce readonly_bad_hva Xiao Guangrong
2012-07-19 10:16 ` Avi Kivity
2012-07-20 3:01 ` Xiao Guangrong
2012-07-17 14:45 ` [PATCH 09/10] KVM: introduce readonly memslot Xiao Guangrong
2012-07-17 14:46 ` [PATCH 10/10] KVM: indicate readonly access fault Xiao Guangrong
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