| Message ID | 20170630155431.23824-12-julien.grall@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Julien, On 06/30/2017 05:54 PM, Julien Grall wrote: > The helpers p2m_valid, p2m_table, p2m_mapping and p2m_is_superpage are > not specific to the stage-2 translation tables. They can also work on > any LPAE translation tables. So rename then to lpae_* and use pte.walk > to look for the value of the field. > > Signed-off-by: Julien Grall <julien.grall@arm.com> > Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> > --- > > Cc: proskurin@sec.in.tum.de > > s/bool_t/bool/ will be done in a separate patch > > Changes in v2: > - Patch added > > Changes in v3: > - Add Stefano's reviewed-by Reviewed-by: Sergej Proskurin <proskurin@sec.in.tum.de> > --- > xen/arch/arm/p2m.c | 45 +++++++++++++++++++++++---------------------- > 1 file changed, 23 insertions(+), 22 deletions(-) > > diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c > index 3e20a1ec82..381df1f237 100644 > --- a/xen/arch/arm/p2m.c > +++ b/xen/arch/arm/p2m.c > @@ -52,27 +52,27 @@ static const paddr_t level_masks[] = > static const uint8_t level_orders[] = > { ZEROETH_ORDER, FIRST_ORDER, SECOND_ORDER, THIRD_ORDER }; > > -static inline bool_t p2m_valid(lpae_t pte) > +static inline bool_t lpae_valid(lpae_t pte) > { > - return pte.p2m.valid; > + return pte.walk.valid; > } > /* > * These two can only be used on L0..L2 ptes because L3 mappings set > * the table bit and therefore these would return the opposite to what > * you would expect. > */ > -static inline bool_t p2m_table(lpae_t pte) > +static inline bool_t lpae_table(lpae_t pte) > { > - return p2m_valid(pte) && pte.p2m.table; > + return lpae_valid(pte) && pte.walk.table; > } > -static inline bool_t p2m_mapping(lpae_t pte) > +static inline bool_t lpae_mapping(lpae_t pte) > { > - return p2m_valid(pte) && !pte.p2m.table; > + return lpae_valid(pte) && !pte.walk.table; > } > > -static inline bool p2m_is_superpage(lpae_t pte, unsigned int level) > +static inline bool lpae_is_superpage(lpae_t pte, unsigned int level) > { > - return (level < 3) && p2m_mapping(pte); > + return (level < 3) && lpae_mapping(pte); > } > > static void p2m_flush_tlb(struct p2m_domain *p2m); > @@ -281,7 +281,7 @@ static int p2m_next_level(struct p2m_domain *p2m, bool read_only, > > entry = *table + offset; > > - if ( !p2m_valid(*entry) ) > + if ( !lpae_valid(*entry) ) > { > if ( read_only ) > return GUEST_TABLE_MAP_FAILED; > @@ -292,7 +292,7 @@ static int p2m_next_level(struct p2m_domain *p2m, bool read_only, > } > > /* The function p2m_next_level is never called at the 3rd level */ > - if ( p2m_mapping(*entry) ) > + if ( lpae_mapping(*entry) ) > return GUEST_TABLE_SUPER_PAGE; > > mfn = _mfn(entry->p2m.base); > @@ -372,7 +372,7 @@ mfn_t p2m_get_entry(struct p2m_domain *p2m, gfn_t gfn, > > entry = table[offsets[level]]; > > - if ( p2m_valid(entry) ) > + if ( lpae_valid(entry) ) > { > *t = entry.p2m.type; > > @@ -577,7 +577,7 @@ static int p2m_create_table(struct p2m_domain *p2m, lpae_t *entry) > lpae_t *p; > lpae_t pte; > > - ASSERT(!p2m_valid(*entry)); > + ASSERT(!lpae_valid(*entry)); > > page = alloc_domheap_page(NULL, 0); > if ( page == NULL ) > @@ -645,7 +645,7 @@ enum p2m_operation { > */ > static void p2m_put_l3_page(const lpae_t pte) > { > - ASSERT(p2m_valid(pte)); > + ASSERT(lpae_valid(pte)); > > /* > * TODO: Handle other p2m types > @@ -673,11 +673,11 @@ static void p2m_free_entry(struct p2m_domain *p2m, > struct page_info *pg; > > /* Nothing to do if the entry is invalid. */ > - if ( !p2m_valid(entry) ) > + if ( !lpae_valid(entry) ) > return; > > /* Nothing to do but updating the stats if the entry is a super-page. */ > - if ( p2m_is_superpage(entry, level) ) > + if ( lpae_is_superpage(entry, level) ) > { > p2m->stats.mappings[level]--; > return; > @@ -733,7 +733,7 @@ static bool p2m_split_superpage(struct p2m_domain *p2m, lpae_t *entry, > * a superpage. > */ > ASSERT(level < target); > - ASSERT(p2m_is_superpage(*entry, level)); > + ASSERT(lpae_is_superpage(*entry, level)); > > page = alloc_domheap_page(NULL, 0); > if ( !page ) > @@ -870,7 +870,7 @@ static int __p2m_set_entry(struct p2m_domain *p2m, > /* We need to split the original page. */ > lpae_t split_pte = *entry; > > - ASSERT(p2m_is_superpage(*entry, level)); > + ASSERT(lpae_is_superpage(*entry, level)); > > if ( !p2m_split_superpage(p2m, &split_pte, level, target, offsets) ) > { > @@ -944,12 +944,12 @@ static int __p2m_set_entry(struct p2m_domain *p2m, > * sequence when updating the translation table (D4.7.1 in ARM DDI > * 0487A.j). > */ > - if ( p2m_valid(orig_pte) ) > + if ( lpae_valid(orig_pte) ) > p2m_remove_pte(entry, p2m->clean_pte); > > if ( mfn_eq(smfn, INVALID_MFN) ) > /* Flush can be deferred if the entry is removed */ > - p2m->need_flush |= !!p2m_valid(orig_pte); > + p2m->need_flush |= !!lpae_valid(orig_pte); > else > { > lpae_t pte = mfn_to_p2m_entry(smfn, t, a); > @@ -964,7 +964,7 @@ static int __p2m_set_entry(struct p2m_domain *p2m, > * Although, it could be defered when only the permissions are > * changed (e.g in case of memaccess). > */ > - if ( p2m_valid(orig_pte) ) > + if ( lpae_valid(orig_pte) ) > { > if ( likely(!p2m->mem_access_enabled) || > P2M_CLEAR_PERM(pte) != P2M_CLEAR_PERM(orig_pte) ) > @@ -986,10 +986,11 @@ static int __p2m_set_entry(struct p2m_domain *p2m, > * Free the entry only if the original pte was valid and the base > * is different (to avoid freeing when permission is changed). > */ > - if ( p2m_valid(orig_pte) && entry->p2m.base != orig_pte.p2m.base ) > + if ( lpae_valid(orig_pte) && entry->p2m.base != orig_pte.p2m.base ) > p2m_free_entry(p2m, orig_pte, level); > > - if ( need_iommu(p2m->domain) && (p2m_valid(orig_pte) || p2m_valid(*entry)) ) > + if ( need_iommu(p2m->domain) && > + (lpae_valid(orig_pte) || lpae_valid(*entry)) ) > rc = iommu_iotlb_flush(p2m->domain, gfn_x(sgfn), 1UL << page_order); > else > rc = 0; > Cheers, ~Sergej
diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c index 3e20a1ec82..381df1f237 100644 --- a/xen/arch/arm/p2m.c +++ b/xen/arch/arm/p2m.c @@ -52,27 +52,27 @@ static const paddr_t level_masks[] = static const uint8_t level_orders[] = { ZEROETH_ORDER, FIRST_ORDER, SECOND_ORDER, THIRD_ORDER }; -static inline bool_t p2m_valid(lpae_t pte) +static inline bool_t lpae_valid(lpae_t pte) { - return pte.p2m.valid; + return pte.walk.valid; } /* * These two can only be used on L0..L2 ptes because L3 mappings set * the table bit and therefore these would return the opposite to what * you would expect. */ -static inline bool_t p2m_table(lpae_t pte) +static inline bool_t lpae_table(lpae_t pte) { - return p2m_valid(pte) && pte.p2m.table; + return lpae_valid(pte) && pte.walk.table; } -static inline bool_t p2m_mapping(lpae_t pte) +static inline bool_t lpae_mapping(lpae_t pte) { - return p2m_valid(pte) && !pte.p2m.table; + return lpae_valid(pte) && !pte.walk.table; } -static inline bool p2m_is_superpage(lpae_t pte, unsigned int level) +static inline bool lpae_is_superpage(lpae_t pte, unsigned int level) { - return (level < 3) && p2m_mapping(pte); + return (level < 3) && lpae_mapping(pte); } static void p2m_flush_tlb(struct p2m_domain *p2m); @@ -281,7 +281,7 @@ static int p2m_next_level(struct p2m_domain *p2m, bool read_only, entry = *table + offset; - if ( !p2m_valid(*entry) ) + if ( !lpae_valid(*entry) ) { if ( read_only ) return GUEST_TABLE_MAP_FAILED; @@ -292,7 +292,7 @@ static int p2m_next_level(struct p2m_domain *p2m, bool read_only, } /* The function p2m_next_level is never called at the 3rd level */ - if ( p2m_mapping(*entry) ) + if ( lpae_mapping(*entry) ) return GUEST_TABLE_SUPER_PAGE; mfn = _mfn(entry->p2m.base); @@ -372,7 +372,7 @@ mfn_t p2m_get_entry(struct p2m_domain *p2m, gfn_t gfn, entry = table[offsets[level]]; - if ( p2m_valid(entry) ) + if ( lpae_valid(entry) ) { *t = entry.p2m.type; @@ -577,7 +577,7 @@ static int p2m_create_table(struct p2m_domain *p2m, lpae_t *entry) lpae_t *p; lpae_t pte; - ASSERT(!p2m_valid(*entry)); + ASSERT(!lpae_valid(*entry)); page = alloc_domheap_page(NULL, 0); if ( page == NULL ) @@ -645,7 +645,7 @@ enum p2m_operation { */ static void p2m_put_l3_page(const lpae_t pte) { - ASSERT(p2m_valid(pte)); + ASSERT(lpae_valid(pte)); /* * TODO: Handle other p2m types @@ -673,11 +673,11 @@ static void p2m_free_entry(struct p2m_domain *p2m, struct page_info *pg; /* Nothing to do if the entry is invalid. */ - if ( !p2m_valid(entry) ) + if ( !lpae_valid(entry) ) return; /* Nothing to do but updating the stats if the entry is a super-page. */ - if ( p2m_is_superpage(entry, level) ) + if ( lpae_is_superpage(entry, level) ) { p2m->stats.mappings[level]--; return; @@ -733,7 +733,7 @@ static bool p2m_split_superpage(struct p2m_domain *p2m, lpae_t *entry, * a superpage. */ ASSERT(level < target); - ASSERT(p2m_is_superpage(*entry, level)); + ASSERT(lpae_is_superpage(*entry, level)); page = alloc_domheap_page(NULL, 0); if ( !page ) @@ -870,7 +870,7 @@ static int __p2m_set_entry(struct p2m_domain *p2m, /* We need to split the original page. */ lpae_t split_pte = *entry; - ASSERT(p2m_is_superpage(*entry, level)); + ASSERT(lpae_is_superpage(*entry, level)); if ( !p2m_split_superpage(p2m, &split_pte, level, target, offsets) ) { @@ -944,12 +944,12 @@ static int __p2m_set_entry(struct p2m_domain *p2m, * sequence when updating the translation table (D4.7.1 in ARM DDI * 0487A.j). */ - if ( p2m_valid(orig_pte) ) + if ( lpae_valid(orig_pte) ) p2m_remove_pte(entry, p2m->clean_pte); if ( mfn_eq(smfn, INVALID_MFN) ) /* Flush can be deferred if the entry is removed */ - p2m->need_flush |= !!p2m_valid(orig_pte); + p2m->need_flush |= !!lpae_valid(orig_pte); else { lpae_t pte = mfn_to_p2m_entry(smfn, t, a); @@ -964,7 +964,7 @@ static int __p2m_set_entry(struct p2m_domain *p2m, * Although, it could be defered when only the permissions are * changed (e.g in case of memaccess). */ - if ( p2m_valid(orig_pte) ) + if ( lpae_valid(orig_pte) ) { if ( likely(!p2m->mem_access_enabled) || P2M_CLEAR_PERM(pte) != P2M_CLEAR_PERM(orig_pte) ) @@ -986,10 +986,11 @@ static int __p2m_set_entry(struct p2m_domain *p2m, * Free the entry only if the original pte was valid and the base * is different (to avoid freeing when permission is changed). */ - if ( p2m_valid(orig_pte) && entry->p2m.base != orig_pte.p2m.base ) + if ( lpae_valid(orig_pte) && entry->p2m.base != orig_pte.p2m.base ) p2m_free_entry(p2m, orig_pte, level); - if ( need_iommu(p2m->domain) && (p2m_valid(orig_pte) || p2m_valid(*entry)) ) + if ( need_iommu(p2m->domain) && + (lpae_valid(orig_pte) || lpae_valid(*entry)) ) rc = iommu_iotlb_flush(p2m->domain, gfn_x(sgfn), 1UL << page_order); else rc = 0;