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Re: [PATCH v5 1/3] x86/iommu: remove regions not to be mapped
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 25 Jan 2024 09:34:40 +0100
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- Cc: Paul Durrant <paul@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 25 Jan 2024 08:34:53 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 24.01.2024 18:29, Roger Pau Monne wrote:
> --- a/xen/arch/x86/hvm/io.c
> +++ b/xen/arch/x86/hvm/io.c
> @@ -369,6 +369,22 @@ bool vpci_is_mmcfg_address(const struct domain *d,
> paddr_t addr)
> return vpci_mmcfg_find(d, addr);
> }
>
> +int __hwdom_init vpci_subtract_mmcfg(const struct domain *d, struct rangeset
> *r)
> +{
> + const struct hvm_mmcfg *mmcfg;
> +
> + list_for_each_entry ( mmcfg, &d->arch.hvm.mmcfg_regions, next )
> + {
> + int rc = rangeset_remove_range(r, PFN_DOWN(mmcfg->addr),
> + PFN_DOWN(mmcfg->addr + mmcfg->size -
> 1));
Along the lines of this, ...
> --- a/xen/arch/x86/setup.c
> +++ b/xen/arch/x86/setup.c
> @@ -2138,6 +2138,54 @@ int __hwdom_init xen_in_range(unsigned long mfn)
> return 0;
> }
>
> +int __hwdom_init remove_xen_ranges(struct rangeset *r)
> +{
> + paddr_t start, end;
> + int rc;
> +
> + /* S3 resume code (and other real mode trampoline code) */
> + rc = rangeset_remove_range(r, PFN_DOWN(bootsym_phys(trampoline_start)),
> + PFN_DOWN(bootsym_phys(trampoline_end)) - 1);
... did you perhaps mean
PFN_DOWN(bootsym_phys(trampoline_end) - 1));
here (and then similarly below, except there the difference is benign I
think, for the labels being page-aligned)?
Jan
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