[PATCH v1 01/13] genirq/msi: Store the IOMMU IOVA directly in msi_desc instead of iommu_cookie
Jacob Pan
jacob.pan at linux.microsoft.com
Thu Feb 13 12:28:49 PST 2025
Hi Nicolin,
On Sat, 8 Feb 2025 01:02:34 -0800
Nicolin Chen <nicolinc at nvidia.com> wrote:
> -static inline void msi_desc_set_iommu_cookie(struct msi_desc *desc,
> - const void
> *iommu_cookie) +/**
> + * iommu_dma_compose_msi_msg() - Apply translation to an MSI message
> + * @desc: MSI descriptor prepared by iommu_dma_prepare_msi()
> + * @msg: MSI message containing target physical address
> + */
Is it IOVA not PA?
> +static inline void iommu_dma_compose_msi_msg(struct msi_desc *desc,
> + struct msi_msg *msg)
> {
> -}
> +#ifdef CONFIG_IRQ_MSI_IOMMU
> + if (desc->iommu_msi_page_shift) {
> + u64 msi_iova = desc->iommu_msi_iova
> + << desc->iommu_msi_page_shift;
> +
> + msg->address_hi = upper_32_bits(msi_iova);
> + msg->address_lo = lower_32_bits(msi_iova) |
> + (msg->address_lo &
> + ((1 <<
> desc->iommu_msi_page_shift) - 1));
> + }
> #endif
> +}
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