On Tue, Apr 23, 2024 at 09:25:28AM +0100, Luca Fancellu wrote: > From: Penny Zheng <[email protected]> > > We are doing foreign memory mapping for static shared memory, and > there is a great possibility that it could be super mapped. > But today, p2m_put_l3_page could not handle superpages. > > This commits implements a new function p2m_put_superpage to handle superpages, > specifically for helping put extra references for foreign superpages. > > Signed-off-by: Penny Zheng <[email protected]> > Signed-off-by: Luca Fancellu <[email protected]> > --- > v1: > - patch from > https://patchwork.kernel.org/project/xen-devel/patch/[email protected]/ > --- > xen/arch/arm/mmu/p2m.c | 58 +++++++++++++++++++++++++++++++----------- > 1 file changed, 43 insertions(+), 15 deletions(-) > > diff --git a/xen/arch/arm/mmu/p2m.c b/xen/arch/arm/mmu/p2m.c > index 41fcca011cf4..479a80fbd4cf 100644 > --- a/xen/arch/arm/mmu/p2m.c > +++ b/xen/arch/arm/mmu/p2m.c > @@ -753,17 +753,9 @@ static int p2m_mem_access_radix_set(struct p2m_domain > *p2m, gfn_t gfn, > return rc; > } > > -/* > - * Put any references on the single 4K page referenced by pte. > - * TODO: Handle superpages, for now we only take special references for leaf > - * pages (specifically foreign ones, which can't be super mapped today). > - */ > -static void p2m_put_l3_page(const lpae_t pte) > +/* Put any references on the single 4K page referenced by mfn. */ > +static void p2m_put_l3_page(mfn_t mfn, unsigned type) ^ p2m_type_t?
Roger.
