PVH guests are not supposed to access I/O ports they weren't given
access to (there's nothing to handle emulation of such accesses).
Reported-by: Roger Pau Monné<roger....@citrix.com>
Signed-off-by: Jan Beulich <jbeul...@suse.com>
---
Note: Only compile tested so far.
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -3082,6 +3082,9 @@ void vmx_vmexit_handler(struct cpu_user_
}
case EXIT_REASON_IO_INSTRUCTION:
+ if ( unlikely(is_pvh_vcpu(v)) )
+ goto exit_and_crash;
+
__vmread(EXIT_QUALIFICATION, &exit_qualification);
if ( exit_qualification & 0x10 )
{
VMX: don't allow PVH to reach handle_pio() or handle_mmio()
PVH guests are not supposed to access I/O ports they weren't given
access to (there's nothing to handle emulation of such accesses).
Reported-by: Roger Pau Monné<roger....@citrix.com>
Signed-off-by: Jan Beulich <jbeul...@suse.com>
---
Note: Only compile tested so far.
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -3082,6 +3082,9 @@ void vmx_vmexit_handler(struct cpu_user_
}
case EXIT_REASON_IO_INSTRUCTION:
+ if ( unlikely(is_pvh_vcpu(v)) )
+ goto exit_and_crash;
+
__vmread(EXIT_QUALIFICATION, &exit_qualification);
if ( exit_qualification & 0x10 )
{
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