[PATCH 17/24] PVH xen: mtrr, tsc, grant changes...

[Mukesh Rathor <mukesh.rathor@oracle.com>]

PVH only supports limited memory types in Phase I. TSC is limited to
native mode only also for the moment. Finally, grant mapping of iomem
for PVH hasn't been explored in phase I.

Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
---
 xen/arch/x86/hvm/mtrr.c  |    8 ++++++++
 xen/arch/x86/time.c      |    8 ++++++++
 xen/common/grant_table.c |    4 ++--
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/hvm/mtrr.c b/xen/arch/x86/hvm/mtrr.c
index ef51a8d..b9d6411 100644
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -693,6 +693,14 @@ uint8_t epte_get_entry_emt(struct domain *d, unsigned long gfn, mfn_t mfn,
          ((d->vcpu == NULL) || ((v = d->vcpu[0]) == NULL)) )
         return MTRR_TYPE_WRBACK;
 
+    /* PVH fixme: Add support for more memory types. */
+    if ( is_pvh_domain(d) )
+    {
+        if ( direct_mmio )
+            return MTRR_TYPE_UNCACHABLE;
+        return MTRR_TYPE_WRBACK;
+    }
+
     if ( !v->domain->arch.hvm_domain.params[HVM_PARAM_IDENT_PT] )
         return MTRR_TYPE_WRBACK;
 
diff --git a/xen/arch/x86/time.c b/xen/arch/x86/time.c
index cf8bc78..55f6f4b 100644
--- a/xen/arch/x86/time.c
+++ b/xen/arch/x86/time.c
@@ -1890,6 +1890,14 @@ void tsc_set_info(struct domain *d,
         d->arch.vtsc = 0;
         return;
     }
+    if ( is_pvh_domain(d) && tsc_mode != TSC_MODE_NEVER_EMULATE )
+    {
+        /* PVH fixme: support more tsc modes. */
+        printk(XENLOG_WARNING
+               "PVH currently does not support tsc emulation. Setting timer_mode = native\n");
+        d->arch.vtsc = 0;
+        return;
+    }
 
     switch ( d->arch.tsc_mode = tsc_mode )
     {
diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c
index eb50288..c51da30 100644
--- a/xen/common/grant_table.c
+++ b/xen/common/grant_table.c
@@ -721,7 +721,7 @@ __gnttab_map_grant_ref(
 
     double_gt_lock(lgt, rgt);
 
-    if ( !is_hvm_domain(ld) && need_iommu(ld) )
+    if ( is_pv_domain(ld) && need_iommu(ld) )
     {
         unsigned int wrc, rdc;
         int err = 0;
@@ -932,7 +932,7 @@ __gnttab_unmap_common(
             act->pin -= GNTPIN_hstw_inc;
     }
 
-    if ( !is_hvm_domain(ld) && need_iommu(ld) )
+    if ( is_pv_domain(ld) && need_iommu(ld) )
     {
         unsigned int wrc, rdc;
         int err = 0;
-- 
1.7.2.3