Re: [Xen-devel] KEXEC: fix kexec_get_range_compat to fail vocally

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 05/12/11 12:58, Jan Beulich wrote:
>>>> On 05.12.11 at 12:35, Andrew Cooper <andrew.cooper3@xxxxxxxxxx> wrote:
>> I am not sure that this is the only instance, but it is really not
>> acceptable to hand truncated pointers or sizes for physical memory to dom0.
> While I agree to the change, I think we also ought to add a new flavor
> of KEXEC_CMD_kexec_get_range that is 64-bit capable even for a
> 32-bit Dom0.

Agreed - I am working on introducing a new hypercall right now.

> Both under the assumption that apart from the truncation nothing
> prevents addresses above the 4G boundary from being usable with
> a 32-bit kernel for at least one of the ranges (probably only
> KEXEC_RANGE_MA_CPU and KEXEC_RANGE_MA_VMCOREINFO are
> candidates for this on x86).

Will those ranges not be covered by my patch?

> Jan
>

-- 
Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer
T: +44 (0)1223 225 900, http://www.citrix.com


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