[Xen-devel] [PATCH v2 2/4] x86/dom0: prevent PVH Dom0 from mapping read-only the IO APIC area

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

This is emulated by Xen and must not be mapped into PVH Dom0 p2m.

Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/dom0_build.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/dom0_build.c b/xen/arch/x86/dom0_build.c
index 3e0910d779..804efee1a9 100644
--- a/xen/arch/x86/dom0_build.c
+++ b/xen/arch/x86/dom0_build.c
@@ -402,7 +402,7 @@ int __init dom0_setup_permissions(struct domain *d)
     for ( i = 0; i < nr_ioapics; i++ )
     {
         mfn = paddr_to_pfn(mp_ioapics[i].mpc_apicaddr);
-        if ( !rangeset_contains_singleton(mmio_ro_ranges, mfn) )
+        if ( dom0_pvh || !rangeset_contains_singleton(mmio_ro_ranges, mfn) )
             rc |= iomem_deny_access(d, mfn, mfn);
     }
     /* MSI range. */
-- 
2.11.0 (Apple Git-81)


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