Re: [PATCH] xen/pvhvm: If xen_platform_pci=0 is set don't blow up.
From: Stefano Stabellini <hidden>
Date: 2013-12-04 10:48:42
Also in:
linux-input, linux-pci, lkml, netdev
On Tue, 3 Dec 2013, Konrad Rzeszutek Wilk wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/x86/xen/platform-pci-unplug.c b/arch/x86/xen/platform-pci-unplug.c index 0a78524..087dfeb 100644 --- a/arch/x86/xen/platform-pci-unplug.c +++ b/arch/x86/xen/platform-pci-unplug.c@@ -69,6 +69,24 @@ static int check_platform_magic(void) return 0; } +bool xen_has_pv_devices(void) +{ + if (!xen_domain()) + return false; + + if (xen_hvm_domain()) { + /* User requested no unplug, so no PV drivers. */ + if (xen_emul_unplug & XEN_UNPLUG_NEVER) + return false;
Considering that if (xen_emul_unplug & XEN_UNPLUG_NEVER) we never set xen_platform_pci_unplug, this check is redundant.
+ /* And user has xen_platform_pci=0 set in guest config as
+ * driver did not modify the value. */
+ if (!xen_platform_pci_unplug)
+ return false;
+ }
+ return true;
+}
+EXPORT_SYMBOL_GPL(xen_has_pv_devices);
+
void xen_unplug_emulated_devices(void)
{
int r;