@@ -868,7 +868,7 @@ debug hypervisor only).
> Default: `new` unless directed-EOI is supported
### iommu
-> `= List of [ <boolean> | force | required | intremap | qinval | snoop | sharept | dom0-passthrough | dom0-strict | amd-iommu-perdev-intremap | workaround_bios_bug | igfx | verbose | debug ]`
+> `= List of [ <boolean> | force | required | intremap | intpost | qinval | snoop | sharept | dom0-passthrough | dom0-strict | amd-iommu-perdev-intremap | workaround_bios_bug | igfx | verbose | debug ]`
> Sub-options:
@@ -895,6 +895,13 @@ debug hypervisor only).
>> Control the use of interrupt remapping (DMA remapping will always be enabled
>> if IOMMU functionality is enabled).
+> `intpost`
+
+> Default: `false`
+
+>> Control the use of interrupt posting, which depends on the availability of
+>> interrupt remapping.
+
> `qinval` (VT-d)
> Default: `true`
@@ -32,6 +32,7 @@ static void iommu_dump_p2m_table(unsigned char key);
* off|no|false|disable Disable IOMMU (default)
* force|required Don't boot unless IOMMU is enabled
* no-intremap Disable interrupt remapping
+ * no-intpost Disable VT-d Interrupt posting
* verbose Be more verbose
* debug Enable debugging messages and checks
* workaround_bios_bug Workaround some bios issue to still enable
@@ -105,6 +106,8 @@ static void __init parse_iommu_param(char *s)
iommu_qinval = val;
else if ( !strcmp(s, "intremap") )
iommu_intremap = val;
+ else if ( !strcmp(s, "intpost") )
+ iommu_intpost = val;
else if ( !strcmp(s, "debug") )
{
iommu_debug = val;