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0/2] xen/x86: support foreign mappings for HVM From: Oleksii To: Roger Pau Monne , xen-devel@lists.xenproject.org Cc: Jan Beulich , Andrew Cooper , George Dunlap , Community Manager Date: Thu, 02 May 2024 10:50:38 +0200 In-Reply-To: <20240430165845.81696-1-roger.pau@citrix.com> References: <20240430165845.81696-1-roger.pau@citrix.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.4 (3.50.4-1.fc39) MIME-Version: 1.0 Hi Roger, On Tue, 2024-04-30 at 18:58 +0200, Roger Pau Monne wrote: > Hello, >=20 > The following series attempts to solve a shortcoming of HVM/PVH > guests > with the lack of support for foreign mappings.=C2=A0 Such lack of support > prevents using PVH based guests as stubdomains for example. >=20 > Add support in a way similar to how it was done on Arm, by iterating > over the p2m based on the maximum gfn. >=20 > Mostly untested, sending early in case it could be considered for > 4.19. In case of it will be properly tested I think we can consider this patch as a candidate for 4.19 ~ Oleksii >=20 > Thanks, Roger. >=20 > Roger Pau Monne (2): > =C2=A0 xen/x86: account for max guest gfn and number of foreign mappings > in > =C2=A0=C2=A0=C2=A0 the p2m > =C2=A0 xen/x86: remove foreign mappings from the p2m on teardown >=20 > =C2=A0CHANGELOG.md=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 1 + > =C2=A0xen/arch/x86/domain.c=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0 |=C2=A0 6 +++ > =C2=A0xen/arch/x86/include/asm/p2m.h | 28 ++++++++++---- > =C2=A0xen/arch/x86/mm/p2m.c=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0 | 70 > ++++++++++++++++++++++++++++++++-- > =C2=A04 files changed, 94 insertions(+), 11 deletions(-) >=20