Re: [Qemu-devel] [PATCH v2 for-2.0] target-i386: x86_cpu_get_phys_page_debug(): support 1GB page translation

[Andreas Färber]

Am 19.03.2014 22:03, schrieb Luiz Capitulino:
> Linux guests, when using more than 4GB of RAM, may end up using 1GB pages
> to store (kernel) data. When this happens, we're unable to debug a running
> Linux kernel with GDB:
> 
> (gdb) p node_data[0]->node_id
> Cannot access memory at address 0xffff88013fffd3a0
> (gdb)
> 
> GDB returns this error because x86_cpu_get_phys_page_debug() doesn't support
> translating 1GB pages in IA-32e paging mode and returns an error to GDB.
> 
> This commit adds support for 1GB page translation for IA32e paging.
> 
> Signed-off-by: Luiz capitulino <address@hidden>

Capitulino? :)

> ---
> 
> - I'm proposing this patch for 2.0 because GDB debugging of large Linux
>   guests is kind of broken

Agree that it would be nice to fix, but having mainly touched the
function interface, I am dependent on reviewers here. => rc2 or .1

Regards,
Andreas

> 
> - Changelog v2:
>   - Move PS bit handling to if (env->hflags & HF_LMA_MASK) block
>   - Update changelog
> 
>  target-i386/helper.c | 9 +++++++++
>  1 file changed, 9 insertions(+)

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