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SubjectRE: [PATCH v10 10/16] x86/virt/tdx: Allocate and set up PAMTs for TDMRs
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> 
> +/*
> + * Calculate PAMT size given a TDMR and a page size. The returned
> + * PAMT size is always aligned up to 4K page boundary.
> + */
> +static unsigned long tdmr_get_pamt_sz(struct tdmr_info *tdmr, int pgsz,
> + u16 pamt_entry_size)
> +{
> + unsigned long pamt_sz, nr_pamt_entries;
> +
> + switch (pgsz) {
> + case TDX_PS_4K:
> + nr_pamt_entries = tdmr->size >> PAGE_SHIFT;
> + break;
> + case TDX_PS_2M:
> + nr_pamt_entries = tdmr->size >> PMD_SHIFT;
> + break;
> + case TDX_PS_1G:
> + nr_pamt_entries = tdmr->size >> PUD_SHIFT;
> + break;
> + default:
> + WARN_ON_ONCE(1);
> + return 0;
> + }
> +
> + pamt_sz = nr_pamt_entries * pamt_entry_size;
> + /* TDX requires PAMT size must be 4K aligned */
> + pamt_sz = ALIGN(pamt_sz, PAGE_SIZE);

Should we ALIGN_UP for safe ?

> +
> + return pamt_sz;
> +}
> +

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