[Xen-devel] [PATCH 07/11] x86/altp2m: introduce p2m_ram_rw_ve type.

[Ed White <edmund.h.white@xxxxxxxxx>]

This is treated exactly like p2m_ram_rw, except that suppress_ve is not
set in the EPTE.

Signed-off-by: Ed White <edmund.h.white@xxxxxxxxx>
---
 xen/arch/x86/mm/p2m-ept.c | 3 ++-
 xen/include/asm-x86/p2m.h | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/mm/p2m-ept.c b/xen/arch/x86/mm/p2m-ept.c
index 255b681..d227cbb 100644
--- a/xen/arch/x86/mm/p2m-ept.c
+++ b/xen/arch/x86/mm/p2m-ept.c
@@ -117,6 +117,7 @@ static void ept_p2m_type_to_flags(ept_entry_t *entry, 
p2m_type_t type, p2m_acces
             entry->r = entry->w = entry->x = 0;
             break;
         case p2m_ram_rw:
+        case p2m_ram_rw_ve:
             entry->r = entry->w = entry->x = 1;
             break;
         case p2m_mmio_direct:
@@ -771,7 +772,7 @@ ept_set_entry(struct p2m_domain *p2m, unsigned long gfn, 
mfn_t mfn,
     }
 
     if ( cpu_has_vmx_virt_exceptions )
-        new_entry.suppress_ve = 1;
+        new_entry.suppress_ve = (p2mt != p2m_ram_rw_ve);
 
     rc = atomic_write_ept_entry(ept_entry, new_entry, target);
     if ( unlikely(rc) )
diff --git a/xen/include/asm-x86/p2m.h b/xen/include/asm-x86/p2m.h
index 9fb5ba0..68a5f80 100644
--- a/xen/include/asm-x86/p2m.h
+++ b/xen/include/asm-x86/p2m.h
@@ -72,6 +72,7 @@ typedef enum {
     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_ram_rw_ve = 15,           /* Same as p2m_ram_rw, but used to allow #VE 
*/
 } p2m_type_t;
 
 /* Modifiers to the query */
@@ -84,6 +85,7 @@ typedef unsigned int p2m_query_t;
 
 /* RAM types, which map to real machine frames */
 #define P2M_RAM_TYPES (p2m_to_mask(p2m_ram_rw)                \
+                       | p2m_to_mask(p2m_ram_rw_ve)           \
                        | p2m_to_mask(p2m_ram_logdirty)        \
                        | p2m_to_mask(p2m_ram_ro)              \
                        | p2m_to_mask(p2m_ram_paging_out)      \
-- 
1.9.1


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