Hi Marcelo,
Thanks for your patience. I was reading your reply over and over again, i would
like to argue it more :).
Please see below.
On 11/29/2012 08:21 AM, Marcelo Tosatti wrote:
https://lkml.org/lkml/2012/11/17/75
Does unshadowing work with large sptes at reexecute_instruction? That
On Mon, Dec 03, 2012 at 04:33:01PM +0800, Xiao Guangrong wrote:
Hi Marcelo,
Thanks for your patience. I was reading your reply over and over again, i
would
like to argue it more :).
Please see below.
On 11/29/2012 08:21 AM, Marcelo Tosatti wrote:
On Tue, Nov 27, 2012 at 11:30:24AM +0800, Xiao Guangrong wrote:
On 11/27/2012 06:41 AM, Marcelo Tosatti wrote:
- return false;
+again:
+ page_fault_count = ACCESS_ONCE(vcpu-kvm-arch.page_fault_count);
+
+ /*
+ * if emulation was due to access to shadowed page table
+ *
On 11/28/2012 10:12 PM, Gleb Natapov wrote:
On Tue, Nov 27, 2012 at 11:30:24AM +0800, Xiao Guangrong wrote:
On 11/27/2012 06:41 AM, Marcelo Tosatti wrote:
- return false;
+again:
+ page_fault_count = ACCESS_ONCE(vcpu-kvm-arch.page_fault_count);
+
+ /*
+ * if emulation was due to
On Wed, Nov 28, 2012 at 10:59:35PM +0800, Xiao Guangrong wrote:
On 11/28/2012 10:12 PM, Gleb Natapov wrote:
On Tue, Nov 27, 2012 at 11:30:24AM +0800, Xiao Guangrong wrote:
On 11/27/2012 06:41 AM, Marcelo Tosatti wrote:
-return false;
+again:
+page_fault_count =
On 11/29/2012 05:57 AM, Marcelo Tosatti wrote:
On Wed, Nov 28, 2012 at 10:59:35PM +0800, Xiao Guangrong wrote:
On 11/28/2012 10:12 PM, Gleb Natapov wrote:
On Tue, Nov 27, 2012 at 11:30:24AM +0800, Xiao Guangrong wrote:
On 11/27/2012 06:41 AM, Marcelo Tosatti wrote:
-return false;
On 11/29/2012 06:40 AM, Xiao Guangrong wrote:
On 11/29/2012 05:57 AM, Marcelo Tosatti wrote:
On Wed, Nov 28, 2012 at 10:59:35PM +0800, Xiao Guangrong wrote:
On 11/28/2012 10:12 PM, Gleb Natapov wrote:
On Tue, Nov 27, 2012 at 11:30:24AM +0800, Xiao Guangrong wrote:
On 11/27/2012 06:41 AM,
On Thu, Nov 29, 2012 at 06:40:51AM +0800, Xiao Guangrong wrote:
On 11/29/2012 05:57 AM, Marcelo Tosatti wrote:
On Wed, Nov 28, 2012 at 10:59:35PM +0800, Xiao Guangrong wrote:
On 11/28/2012 10:12 PM, Gleb Natapov wrote:
On Tue, Nov 27, 2012 at 11:30:24AM +0800, Xiao Guangrong wrote:
On
On Thu, Nov 29, 2012 at 07:16:50AM +0800, Xiao Guangrong wrote:
On 11/29/2012 06:40 AM, Xiao Guangrong wrote:
On 11/29/2012 05:57 AM, Marcelo Tosatti wrote:
On Wed, Nov 28, 2012 at 10:59:35PM +0800, Xiao Guangrong wrote:
On 11/28/2012 10:12 PM, Gleb Natapov wrote:
On Tue, Nov 27, 2012 at
On Tue, Nov 27, 2012 at 11:30:24AM +0800, Xiao Guangrong wrote:
On 11/27/2012 06:41 AM, Marcelo Tosatti wrote:
- return false;
+again:
+ page_fault_count = ACCESS_ONCE(vcpu-kvm-arch.page_fault_count);
+
+ /*
+ * if emulation was due to access to shadowed page table
+ *
On 11/28/2012 07:42 AM, Marcelo Tosatti wrote:
On Tue, Nov 27, 2012 at 11:30:24AM +0800, Xiao Guangrong wrote:
On 11/27/2012 06:41 AM, Marcelo Tosatti wrote:
- return false;
+again:
+ page_fault_count = ACCESS_ONCE(vcpu-kvm-arch.page_fault_count);
+
+ /*
+ * if emulation was due to
On Tue, Nov 20, 2012 at 07:59:53AM +0800, Xiao Guangrong wrote:
The current reexecute_instruction can not well detect the failed instruction
emulation. It allows guest to retry all the instructions except it accesses
on error pfn.
For example, some cases are nested-write-protect - if the
On 11/27/2012 06:41 AM, Marcelo Tosatti wrote:
-return false;
+again:
+page_fault_count = ACCESS_ONCE(vcpu-kvm-arch.page_fault_count);
+
+/*
+ * if emulation was due to access to shadowed page table
+ * and it failed try to unshadow page and re-enter the
+ * guest
The current reexecute_instruction can not well detect the failed instruction
emulation. It allows guest to retry all the instructions except it accesses
on error pfn.
For example, some cases are nested-write-protect - if the page we want to
write is used as PDE but it chains to itself. Under this
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