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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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