[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [V9 PATCH 3/8] pvh dom0: Introduce p2m_map_foreign
In this patch, a new type p2m_map_foreign is introduced for pages that toolstack on an auto translated dom0 or a control domain maps from foreign domains that its creating or supporting during its run time. Signed-off-by: Mukesh Rathor <mukesh.rathor@xxxxxxxxxx> Acked-by: Tim Deegan <tim@xxxxxxx> --- xen/arch/x86/mm/p2m-ept.c | 1 + xen/arch/x86/mm/p2m-pt.c | 1 + xen/arch/x86/mm/p2m.c | 22 +++++++++++++++++----- xen/include/asm-x86/p2m.h | 2 ++ 4 files changed, 21 insertions(+), 5 deletions(-) diff --git a/xen/arch/x86/mm/p2m-ept.c b/xen/arch/x86/mm/p2m-ept.c index a219f8b..1728b57 100644 --- a/xen/arch/x86/mm/p2m-ept.c +++ b/xen/arch/x86/mm/p2m-ept.c @@ -75,6 +75,7 @@ static void ept_p2m_type_to_flags(ept_entry_t *entry, p2m_type_t type, p2m_acces entry->w = 0; break; case p2m_grant_map_rw: + case p2m_map_foreign: entry->r = entry->w = 1; entry->x = 0; break; diff --git a/xen/arch/x86/mm/p2m-pt.c b/xen/arch/x86/mm/p2m-pt.c index 85706ba..3b449b8 100644 --- a/xen/arch/x86/mm/p2m-pt.c +++ b/xen/arch/x86/mm/p2m-pt.c @@ -89,6 +89,7 @@ static unsigned long p2m_type_to_flags(p2m_type_t t, mfn_t mfn) case p2m_ram_rw: return flags | P2M_BASE_FLAGS | _PAGE_RW; case p2m_grant_map_rw: + case p2m_map_foreign: return flags | P2M_BASE_FLAGS | _PAGE_RW | _PAGE_NX_BIT; case p2m_mmio_direct: if ( !rangeset_contains_singleton(mmio_ro_ranges, mfn_x(mfn)) ) diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c index f3476da..9edf8c7 100644 --- a/xen/arch/x86/mm/p2m.c +++ b/xen/arch/x86/mm/p2m.c @@ -496,7 +496,7 @@ p2m_remove_page(struct p2m_domain *p2m, unsigned long gfn, unsigned long mfn, for ( i = 0; i < (1UL << page_order); i++ ) { mfn_return = p2m->get_entry(p2m, gfn + i, &t, &a, 0, NULL); - if ( !p2m_is_grant(t) && !p2m_is_shared(t) ) + if ( !p2m_is_grant(t) && !p2m_is_shared(t) && !p2m_is_foreign(t) ) set_gpfn_from_mfn(mfn+i, INVALID_M2P_ENTRY); ASSERT( !p2m_is_valid(t) || mfn + i == mfn_x(mfn_return) ); } @@ -744,9 +744,9 @@ void p2m_change_type_range(struct domain *d, p2m_unlock(p2m); } - /* Returns: 0 for success, -errno for failure */ -int set_mmio_p2m_entry(struct domain *d, unsigned long gfn, mfn_t mfn) +static int set_typed_p2m_entry(struct domain *d, unsigned long gfn, mfn_t mfn, + p2m_type_t gfn_p2mt) { int rc = 0; p2m_access_t a; @@ -771,8 +771,8 @@ int set_mmio_p2m_entry(struct domain *d, unsigned long gfn, mfn_t mfn) set_gpfn_from_mfn(mfn_x(omfn), INVALID_M2P_ENTRY); } - P2M_DEBUG("set mmio %lx %lx\n", gfn, mfn_x(mfn)); - rc = p2m_set_entry(p2m, gfn, mfn, PAGE_ORDER_4K, p2m_mmio_direct, + P2M_DEBUG("set %d %lx %lx\n", gfn_p2mt, gfn, mfn_x(mfn)); + rc = p2m_set_entry(p2m, gfn, mfn, PAGE_ORDER_4K, gfn_p2mt, p2m->default_access); gfn_unlock(p2m, gfn, 0); if ( rc ) @@ -782,6 +782,18 @@ int set_mmio_p2m_entry(struct domain *d, unsigned long gfn, mfn_t mfn) return rc; } +/* Set foreign mfn in the given guest's p2m table. */ +static int __attribute__((unused)) +set_foreign_p2m_entry(struct domain *d, unsigned long gfn, mfn_t mfn) +{ + return set_typed_p2m_entry(d, gfn, mfn, p2m_map_foreign); +} + +int set_mmio_p2m_entry(struct domain *d, unsigned long gfn, mfn_t mfn) +{ + return set_typed_p2m_entry(d, gfn, mfn, p2m_mmio_direct); +} + /* Returns: 0 for success, -errno for failure */ int clear_mmio_p2m_entry(struct domain *d, unsigned long gfn) { diff --git a/xen/include/asm-x86/p2m.h b/xen/include/asm-x86/p2m.h index 0fdfbda..8aab0ad 100644 --- a/xen/include/asm-x86/p2m.h +++ b/xen/include/asm-x86/p2m.h @@ -70,6 +70,7 @@ typedef enum { p2m_ram_paging_in = 11, /* Memory that is being paged in */ p2m_ram_shared = 12, /* Shared or sharable memory */ p2m_ram_broken = 13, /* Broken page, access cause domain crash */ + p2m_map_foreign = 14, /* ram pages from foreign domain */ } p2m_type_t; /* @@ -180,6 +181,7 @@ typedef unsigned int p2m_query_t; #define p2m_is_sharable(_t) (p2m_to_mask(_t) & P2M_SHARABLE_TYPES) #define p2m_is_shared(_t) (p2m_to_mask(_t) & P2M_SHARED_TYPES) #define p2m_is_broken(_t) (p2m_to_mask(_t) & P2M_BROKEN_TYPES) +#define p2m_is_foreign(_t) (p2m_to_mask(_t) & p2m_to_mask(p2m_map_foreign)) /* Per-p2m-table state */ struct p2m_domain { -- 1.8.3.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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