| Message ID | 20240508112323.38946-2-roger.pau@citrix.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | xen/x86: support foreign mappings for HVM/PVH | expand |
On 08.05.2024 13:23, Roger Pau Monne wrote: > Such information will be needed in order to remove foreign mappings during > teardown for HVM guests. > > Right now the introduced counter is not consumed. > > Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> Yet I think it shouldn't be committed (much) ahead of patch 3. Jan
diff --git a/xen/arch/x86/include/asm/p2m.h b/xen/arch/x86/include/asm/p2m.h index 111badf89a6e..107b9f260848 100644 --- a/xen/arch/x86/include/asm/p2m.h +++ b/xen/arch/x86/include/asm/p2m.h @@ -380,6 +380,9 @@ struct p2m_domain { unsigned int flags; unsigned long entry_count; } ioreq; + + /* Number of foreign mappings. */ + unsigned long nr_foreign; #endif /* CONFIG_HVM */ }; @@ -1049,6 +1052,8 @@ static inline int p2m_entry_modify(struct p2m_domain *p2m, p2m_type_t nt, if ( !page_get_owner_and_reference(mfn_to_page(nfn)) ) return -EBUSY; + p2m->nr_foreign++; + break; default: @@ -1069,6 +1074,7 @@ static inline int p2m_entry_modify(struct p2m_domain *p2m, p2m_type_t nt, return -EINVAL; } put_page(mfn_to_page(ofn)); + p2m->nr_foreign--; break; default:
Such information will be needed in order to remove foreign mappings during teardown for HVM guests. Right now the introduced counter is not consumed. Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> --- Changes since v1: - Drop max_gfn accounting. --- xen/arch/x86/include/asm/p2m.h | 6 ++++++ 1 file changed, 6 insertions(+)