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

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

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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