[Xen-devel] Re: confusion about monitor table in shadow mode

[Tim Deegan <Tim.Deegan@xxxxxxxxxx>]

At 11:32 +0800 on 15 Jan (1232019134), Li Yaqiong wrote:
>       #if SHADOW_PAGING_LEVELS == GUEST_PAGING_LEVELS
>       mfn_t
>       sh_make_monitor_table(struct vcpu *v)
>       {
>       .......
>       }

...

> If a 32-bit hvm is created, its GUEST_PAGING_LEVELS should be 2. In this
> case, SHADOW_PAGING_LEVELS will be 3 and sh_make_monitor_table will not
> be compiled.

Guests with GUEST_PAGING_LEVELS == 2 will us the three-level version,
because their SHADOW_PAGING_LEVELS will be 3.  See the comment in
shadow/types.h where the renaming is defined:

/* sh_make_monitor_table depends only on the number of shadow levels */
#define sh_make_monitor_table \
        SHADOW_INTERNAL_NAME(sh_make_monitor_table,
        SHADOW_PAGING_LEVELS)
#define sh_destroy_monitor_table \
        SHADOW_INTERNAL_NAME(sh_destroy_monitor_table,
        SHADOW_PAGING_LEVELS)

Cheers,

Tim.

-- 
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Citrix Systems (R&D) Ltd.
[Company #02300071, SL9 0DZ, UK.]

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