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Re: [PATCH for-4.19 v2 3/3] xen/x86: remove foreign mappings from the p2m on teardown
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 14 May 2024 16:36:35 +0200
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- Cc: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, Community Manager <community.manager@xxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 14 May 2024 14:36:41 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 08.05.2024 13:23, Roger Pau Monne wrote:
> @@ -1043,7 +1045,7 @@ static inline int p2m_entry_modify(struct p2m_domain
> *p2m, p2m_type_t nt,
> break;
>
> case p2m_map_foreign:
> - if ( !mfn_valid(nfn) )
> + if ( !mfn_valid(nfn) || p2m != p2m_get_hostp2m(p2m->domain) )
> {
> ASSERT_UNREACHABLE();
> return -EINVAL;
> @@ -1068,7 +1070,7 @@ static inline int p2m_entry_modify(struct p2m_domain
> *p2m, p2m_type_t nt,
> break;
>
> case p2m_map_foreign:
> - if ( !mfn_valid(ofn) )
> + if ( !mfn_valid(ofn) || p2m != p2m_get_hostp2m(p2m->domain) )
> {
> ASSERT_UNREACHABLE();
> return -EINVAL;
I wonder whether these two hunks wouldn't more logically be part of patch 1
or 2 (probably not 1, as at that point the assertion isn't quite correct
yet). Then again it may be as (seemingly) unrelated there as it is here.
Thus
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
Jan
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