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Re: [PATCH V2 12/23] xen/ioreq: Remove "hvm" prefixes from involved function names




On 23.11.20 16:56, Jan Beulich wrote:

Hi Jan, Paul

On 23.11.2020 15:39, Oleksandr wrote:
As it was agreed, below the list of proposed renaming (naming) within
current series.
Thanks for compiling this. A couple of suggestions for consideration:

1. Global (existing):
hvm_map_mem_type_to_ioreq_server     -> ioreq_server_map_mem_type
hvm_select_ioreq_server              -> ioreq_server_select
hvm_send_ioreq                       -> ioreq_send
hvm_ioreq_init                       -> ioreq_init
ioreq_domain_init() (or, imo less desirable domain_ioreq_init())?
On Arm (for example) I see two variants are present:
1. That starts with subsystem:
- tee_domain_init
- iommu_domain_init


2. Where sybsystem in the middle:
- domain_io_init
- domain_vuart_init
- domain_vtimer_init

If there is no rule, but a matter of taste then I would use ioreq_domain_init(),
so arch_ioreq_init() wants to be arch_ioreq_domain_init().


hvm_destroy_all_ioreq_servers        -> ioreq_server_destroy_all
hvm_all_ioreq_servers_add_vcpu       -> ioreq_server_add_vcpu_all
hvm_all_ioreq_servers_remove_vcpu    -> ioreq_server_remove_vcpu_all
hvm_broadcast_ioreq                  -> ioreq_broadcast
hvm_create_ioreq_server              -> ioreq_server_create
hvm_get_ioreq_server_info            -> ioreq_server_get_info
hvm_map_io_range_to_ioreq_server     -> ioreq_server_map_io_range
hvm_unmap_io_range_from_ioreq_server -> ioreq_server_unmap_io_range
hvm_set_ioreq_server_state           -> ioreq_server_set_state
hvm_destroy_ioreq_server             -> ioreq_server_destroy
hvm_get_ioreq_server_frame           -> ioreq_server_get_frame
hvm_ioreq_needs_completion           -> ioreq_needs_completion
hvm_mmio_first_byte                  -> ioreq_mmio_first_byte
hvm_mmio_last_byte                   -> ioreq_mmio_last_byte
send_invalidate_req                  -> ioreq_signal_mapcache_invalidate

handle_hvm_io_completion             -> handle_io_completion
For this one I'm not sure what to suggest, but I'm not overly happy
with the name.

I also failed to find a better name. Probably ioreq_ or vcpu_ioreq_ prefix wants to be added here?



hvm_io_pending                       -> io_pending
vcpu_ioreq_pending() or vcpu_any_ioreq_pending()?

I am fine with vcpu_ioreq_pending()



2. Global (new):
arch_io_completion
arch_ioreq_server_map_pages
arch_ioreq_server_unmap_pages
arch_ioreq_server_enable
arch_ioreq_server_disable
arch_ioreq_server_destroy
arch_ioreq_server_map_mem_type
arch_ioreq_server_destroy_all
arch_ioreq_server_get_type_addr
arch_ioreq_init
Assuming this is the arch hook of the similarly named function
further up, a similar adjustment may then be wanted here.

Yes.



domain_has_ioreq_server


3. Local (existing) in common ioreq.c:
hvm_alloc_ioreq_mfn               -> ioreq_alloc_mfn
hvm_free_ioreq_mfn                -> ioreq_free_mfn
These two are server functions, so should imo be ioreq_server_...().

ok, but ...


However, if they're static (as they're now), no distinguishing
prefix is strictly necessary, i.e. alloc_mfn() and free_mfn() may
be fine. The two names may be too short for Paul's taste, though.
Some similar shortening may be possible for some or all of the ones


... In general I would be fine with any option. However, using the shortening rule for all
we are going to end up with single-word function names (enable, init, etc).
So I would prefer to leave locals as is (but dropping hvm prefixes of course and
clarify ioreq_server_alloc_mfn/ioreq_server_free_mfn).

Paul, Jan what do you think?


below here.

Jan

hvm_update_ioreq_evtchn           -> ioreq_update_evtchn
hvm_ioreq_server_add_vcpu         -> ioreq_server_add_vcpu
hvm_ioreq_server_remove_vcpu      -> ioreq_server_remove_vcpu
hvm_ioreq_server_remove_all_vcpus -> ioreq_server_remove_all_vcpus
hvm_ioreq_server_alloc_pages      -> ioreq_server_alloc_pages
hvm_ioreq_server_free_pages       -> ioreq_server_free_pages
hvm_ioreq_server_free_rangesets   -> ioreq_server_free_rangesets
hvm_ioreq_server_alloc_rangesets  -> ioreq_server_alloc_rangesets
hvm_ioreq_server_enable           -> ioreq_server_enable
hvm_ioreq_server_disable          -> ioreq_server_disable
hvm_ioreq_server_init             -> ioreq_server_init
hvm_ioreq_server_deinit           -> ioreq_server_deinit
hvm_send_buffered_ioreq           -> ioreq_send_buffered

hvm_wait_for_io                   -> wait_for_io

4. Local (existing) in x86 ioreq.c:
Everything related to legacy interface (hvm_alloc_legacy_ioreq_gfn, etc)
are going
to remain as is.



--
Regards,

Oleksandr Tyshchenko




 


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