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Re: [PATCH for-4.21] x86/msi: Change __msi_set_enable() to take pci_sbdf_t


  • To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Mon, 3 Feb 2025 09:42:57 +0100
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  • Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
  • Delivery-date: Mon, 03 Feb 2025 08:42:58 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 02.02.2025 14:48, Andrew Cooper wrote:
> This removes the unnecessary work of splitting a 32-bit number across
> 4 registers, and recombining later.  Bloat-o-meter reports:
> 
>   add/remove: 0/0 grow/shrink: 0/9 up/down: 0/-295 (-295)
>   Function                                     old     new   delta
>   enable_iommu                                1748    1732     -16
>   iommu_msi_unmask                              98      81     -17
>   iommu_msi_mask                               100      83     -17
>   disable_iommu                                286     269     -17
>   __msi_set_enable                              81      50     -31
>   __pci_disable_msi                            178     146     -32
>   pci_cleanup_msi                              268     229     -39
>   pci_enable_msi                              1063    1019     -44
>   pci_restore_msi_state                       1116    1034     -82
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>

I was actually thinking to do the same. And we have more of such conversions
to be done.

Jan



 


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