From: Avi Kivity <avi@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>,
LKML <linux-kernel@vger.kernel.org>, KVM <kvm@vger.kernel.org>
Subject: Re: [PATCH v5 00/12] KVM: introduce readonly memslot
Date: Thu, 16 Aug 2012 19:17:13 +0300 [thread overview]
Message-ID: <502D1D09.1030506@redhat.com> (raw)
In-Reply-To: <20120816155739.GA23247@amt.cnet>
On 08/16/2012 06:57 PM, Marcelo Tosatti wrote:
>>
>> Correct. But the chipset is also able to to write-protect some ranges
>> in the 0xc0000-0x100000 area via the PAM. It is able to write-protect
>> both RAM and PCI memory (usually mapped to flash).
>
> You are convinced that adding read-write protection information to the
> memory slots, which controls access by the guest, in addition to the
> userspace host pagetables, is useful. OK.
In fact if we started from scratch I'd go for one huge slot, with
PROT_NONE for mmio and non-kvm APIs for dirty bitmaps, and use Linux mm
APIs to manage the details. This would make kvm x86_64 only (no way to
access the PCI space on i386) but it would simplify a lot of the
internal translation layer. But we're not there.
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2012-08-16 16:17 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-07 9:47 [PATCH v5 00/12] KVM: introduce readonly memslot Xiao Guangrong
2012-08-07 9:48 ` [PATCH v5 01/12] KVM: fix missing check for memslot flags Xiao Guangrong
2012-08-07 9:48 ` [PATCH v5 02/12] KVM: hide KVM_MEMSLOT_INVALID from userspace Xiao Guangrong
2012-08-09 18:48 ` Marcelo Tosatti
2012-08-10 2:11 ` Xiao Guangrong
2012-08-07 9:49 ` [PATCH v5 03/12] KVM: introduce gfn_to_pfn_memslot_atomic Xiao Guangrong
2012-08-09 18:50 ` Marcelo Tosatti
2012-08-10 3:22 ` Xiao Guangrong
2012-08-07 9:50 ` [PATCH v5 04/12] KVM: introduce gfn_to_hva_read/kvm_read_hva/kvm_read_hva_atomic Xiao Guangrong
2012-08-07 9:51 ` [PATCH v5 05/12] KVM: reorganize hva_to_pfn Xiao Guangrong
2012-08-10 17:51 ` Marcelo Tosatti
2012-08-11 3:11 ` Xiao Guangrong
2012-08-07 9:51 ` [PATCH v5 06/12] KVM: use 'writable' as a hint to map writable pfn Xiao Guangrong
2012-08-07 9:52 ` [PATCH v5 07/12] KVM: introduce KVM_PFN_ERR_RO_FAULT Xiao Guangrong
2012-08-07 9:52 ` [PATCH v5 08/12] KVM: introduce KVM_HVA_ERR_BAD Xiao Guangrong
2012-08-07 9:53 ` [PATCH v5 09/12] KVM: introduce KVM_HVA_ERR_RO_BAD Xiao Guangrong
2012-08-07 9:54 ` [PATCH v5 10/12] KVM: introduce readonly memslot Xiao Guangrong
2012-08-07 9:54 ` [PATCH v5 11/12] KVM: x86: introduce set_mmio_exit_info Xiao Guangrong
2012-08-10 18:03 ` Marcelo Tosatti
2012-08-11 3:13 ` Xiao Guangrong
2012-08-07 9:55 ` [PATCH v5 12/12] KVM: indicate readonly access fault Xiao Guangrong
2012-08-10 18:14 ` [PATCH v5 00/12] KVM: introduce readonly memslot Marcelo Tosatti
2012-08-11 3:36 ` Xiao Guangrong
2012-08-13 17:39 ` Marcelo Tosatti
2012-08-14 2:58 ` Xiao Guangrong
2012-08-14 15:25 ` Marcelo Tosatti
2012-08-16 5:49 ` Xiao Guangrong
2012-08-16 16:03 ` Marcelo Tosatti
2012-08-14 14:00 ` Avi Kivity
2012-08-14 15:51 ` Marcelo Tosatti
2012-08-15 10:44 ` Avi Kivity
2012-08-15 17:53 ` Marcelo Tosatti
2012-08-16 9:03 ` Avi Kivity
2012-08-16 15:57 ` Marcelo Tosatti
2012-08-16 16:17 ` Avi Kivity [this message]
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