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[Xen-devel] [PATCH v4 22/31] xen/x86: allow disabling all emulated devices inside of Xen



Only allow enabling or disabling all the emulated devices inside of Xen,
right now Xen doesn't support enabling specific emulated devices only.

Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/domain.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index c508074..432fe43 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -563,7 +563,8 @@ int arch_domain_create(struct domain *d, unsigned int 
domcr_flags,
                           XEN_X86_EMU_IOAPIC | XEN_X86_EMU_PIC |
                           XEN_X86_EMU_PMU | XEN_X86_EMU_VGA |
                           XEN_X86_EMU_IOMMU);
-        if ( (config->emulation_flags & emulation_mask) != emulation_mask )
+        if ( (config->emulation_flags & emulation_mask) != emulation_mask &&
+             (config->emulation_flags & emulation_mask) != 0 )
         {
             printk(XENLOG_G_ERR "d%d: Xen does not allow HVM creation with the 
"
                    "current selection of emulators: %#x.\n", d->domain_id,
-- 
1.9.5 (Apple Git-50.3)


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