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Re: [Qemu-devel] [PATCH] cpu-exec: Fix direct jump to TB spanning page
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From: |
Max Filippov |
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Subject: |
Re: [Qemu-devel] [PATCH] cpu-exec: Fix direct jump to TB spanning page |
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Date: |
Mon, 16 May 2016 17:43:35 +0300 |
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User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Mon, May 16, 2016 at 04:13:00PM +0300, Sergey Fedorov wrote:
> From: Sergey Fedorov <address@hidden>
>
> It is not safe to make a direct jump to a TB spanning two pages in
> system emulation because the mapping for the second page can get changed
> but we don't take care of direct jumps in this case.
>
> However in user mode emulation, this is not the case because there's
> only static address translation and TBs are always invalidated properly.
>
> Fixes: 5b053a4a2827 ("tcg: Clean up direct block chaining safety checks")
>
> Reported-by: Max Filippov <address@hidden>
> Signed-off-by: Sergey Fedorov <address@hidden>
> Signed-off-by: Sergey Fedorov <address@hidden>
> ---
> cpu-exec.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
Tested-by: Max Filippov <address@hidden>
--
Thanks.
-- Max