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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Re: config dependency in stable-2.6.32.x
On Thu, 6 May 2010, M A Young wrote:
> On Thu, 6 May 2010, M A Young wrote:
>
> > I was building a kernel and got the error
> > drivers/built-in.o: In function `do_hvm_suspend':
> > /builddir/build/BUILD/kernel-2.6.32/linux-2.6.32.x86_64/drivers/xen/manage.c:124:
> >
> > undefined reference to `xenbus_suspend'
> > /builddir/build/BUILD/kernel-2.6.32/linux-2.6.32.x86_64/drivers/xen/manage.c:138:
> >
> > undefined reference to `xenbus_resume'
> >
> > As manage.c is built if CONFIG_XEN is selected and the do_hvm_suspend code
> > segment is active if CONFIG_PM_SLEEP (which is on by default) is selected,
> > this means that the current kernel won't build in this case unless
> > CONFIG_XEN_XENBUS_FRONTEND=y as well to supply the xenbus references.
>
> The attached patch is a quick fix for the problem as
> CONFIG_XEN_XENBUS_FRONTEND can't be set directly. Having done this I get
> the error below so it looks like there are some problems with the
> XEN_PLATFORM_PCI code (I was building it with CONFIG_XEN_PLATFORM_PCI=m ).
>
this is due to the newly added pv on hvm support, the root cause of the
issue is that I am working on 2.6.32 and there is no
CONFIG_XEN_XENBUS_FRONTEND there: xenbus_suspend and xenbus_resume are
implemented in drivers/xen/xenbus/xenbus_probe.c that is always compiled
when CONFIG_XEN is selected.
I think that on pvops "select CONFIG_XEN_XENBUS_FRONTEND" needs to be
added to XEN_PLATFORM_PCI rather than to CONFIG_XEN.
> drivers/xen/platform-pci.c:50: error: redefinition of
> 'alloc_xen_mmio'
> include/xen/platform_pci.h:38: note: previous definition of
> 'alloc_xen_mmio' was here
> drivers/xen/platform-pci.c:94: error: redefinition of
> 'platform_pci_disable_irq'
> include/xen/platform_pci.h:43: note: previous definition of
> 'platform_pci_disable_irq' was here
> drivers/xen/platform-pci.c:100: error: redefinition of
> 'platform_pci_enable_irq'
> include/xen/platform_pci.h:44: note: previous definition of
> 'platform_pci_enable_irq' was here
> drivers/xen/platform-pci.c:106: error: redefinition of
> 'platform_pci_resume'
> include/xen/platform_pci.h:42: note: previous definition of
> 'platform_pci_resume' was here
> make[2]: *** [drivers/xen/platform-pci.o] Error 1
>
I knew that xen platform pci device couldn't be compile as a module,
now I fixed the problem and pushed the fix (also appended here).
---
commit ace451e4ef87cfe749d06d51db09f662447e4934
Author: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Date: Fri May 7 15:25:30 2010 +0100
Allow xen platform pci device to be compiled as a module
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 92f393e..9dc2cbd 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -80,6 +80,7 @@ struct shared_info xen_dummy_shared_info;
void *xen_initial_gdt;
int xen_have_vector_callback;
+EXPORT_SYMBOL_GPL(xen_have_vector_callback);
int unplug;
/*
@@ -1327,6 +1328,7 @@ int xen_set_callback_via(uint64_t via)
a.value = via;
return HYPERVISOR_hvm_op(HVMOP_set_param, &a);
}
+EXPORT_SYMBOL_GPL(xen_set_callback_via);
void do_hvm_pv_evtchn_intr(void)
{
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 197ccbc..dc36943 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -686,6 +686,7 @@ void xen_hvm_evtchn_do_upcall(struct pt_regs *regs)
{
__xen_evtchn_do_upcall(regs);
}
+EXPORT_SYMBOL_GPL(xen_hvm_evtchn_do_upcall);
/* Rebind a new event channel to an existing irq. */
void rebind_evtchn_irq(int evtchn, int irq)
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index 3b43013..741ffa2 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -54,6 +54,9 @@
#define GNTTAB_LIST_END 0xffffffff
#define GREFS_PER_GRANT_FRAME (PAGE_SIZE / sizeof(struct grant_entry))
+unsigned long (*alloc_xen_mmio_hook)(unsigned long len);
+EXPORT_SYMBOL_GPL(alloc_xen_mmio_hook);
+
static grant_ref_t **gnttab_list;
static unsigned int nr_grant_frames;
static unsigned int boot_max_nr_grant_frames;
@@ -512,7 +515,7 @@ int gnttab_resume(void)
return gnttab_map(0, nr_grant_frames - 1);
if (!hvm_pv_resume_frames) {
- hvm_pv_resume_frames = alloc_xen_mmio(PAGE_SIZE *
max_nr_gframes);
+ hvm_pv_resume_frames = alloc_xen_mmio_hook(PAGE_SIZE *
max_nr_gframes);
shared = ioremap(hvm_pv_resume_frames, PAGE_SIZE *
max_nr_gframes);
if (shared == NULL) {
printk(KERN_WARNING
@@ -598,6 +601,7 @@ int gnttab_init(void)
kfree(gnttab_list);
return -ENOMEM;
}
+EXPORT_SYMBOL_GPL(gnttab_init);
static int __devinit __gnttab_init(void)
{
diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index 9d57194..9b54305 100644
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -32,6 +32,13 @@ enum shutdown_state {
SHUTDOWN_HALT = 4,
};
+void (*platform_pci_resume_hook)(void);
+EXPORT_SYMBOL_GPL(platform_pci_resume_hook);
+void (*platform_pci_disable_irq_hook)(void);
+EXPORT_SYMBOL_GPL(platform_pci_disable_irq_hook);
+void (*platform_pci_enable_irq_hook)(void);
+EXPORT_SYMBOL_GPL(platform_pci_enable_irq_hook);
+
/* Ignore multiple shutdown requests. */
static enum shutdown_state shutting_down = SHUTDOWN_INVALID;
@@ -50,7 +57,7 @@ static int xen_hvm_suspend(void *data)
if (!*cancelled) {
xen_irq_resume();
- platform_pci_resume();
+ platform_pci_resume_hook();
xen_timer_resume();
}
@@ -126,7 +133,7 @@ static void do_hvm_suspend(void)
printk(KERN_DEBUG "suspending xenstore... ");
xenbus_suspend();
printk(KERN_DEBUG "xenstore suspended\n");
- platform_pci_disable_irq();
+ platform_pci_disable_irq_hook();
err = stop_machine(xen_hvm_suspend, &cancelled, cpumask_of(0));
if (err) {
@@ -134,7 +141,7 @@ static void do_hvm_suspend(void)
cancelled = 1;
}
- platform_pci_enable_irq();
+ platform_pci_enable_irq_hook();
if (!cancelled) {
xen_arch_resume();
@@ -354,5 +361,6 @@ int xen_setup_shutdown_event(void)
return 0;
}
+EXPORT_SYMBOL_GPL(xen_setup_shutdown_event);
subsys_initcall(__setup_shutdown_event);
diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c
index f4818b3..9a4e5d6 100644
--- a/drivers/xen/platform-pci.c
+++ b/drivers/xen/platform-pci.c
@@ -29,6 +29,7 @@
#include <xen/grant_table.h>
#include <xen/platform_pci.h>
+#include <xen/platform_pci.h>
#include <xen/interface/platform_pci.h>
#include <xen/xenbus.h>
#include <xen/events.h>
@@ -251,6 +252,11 @@ static int __init platform_pci_module_init(void)
": No platform pci device model found\n");
return rc;
}
+
+ alloc_xen_mmio_hook = alloc_xen_mmio;
+ platform_pci_resume_hook = platform_pci_resume;
+ platform_pci_disable_irq_hook = platform_pci_disable_irq;
+ platform_pci_enable_irq_hook = platform_pci_enable_irq;
return 0;
}
diff --git a/drivers/xen/xenbus/xenbus_probe.c
b/drivers/xen/xenbus/xenbus_probe.c
index 867cb9f..13b2b6e 100644
--- a/drivers/xen/xenbus/xenbus_probe.c
+++ b/drivers/xen/xenbus/xenbus_probe.c
@@ -883,6 +883,7 @@ int xenbus_probe_init(void)
out_error:
return err;
}
+EXPORT_SYMBOL_GPL(xenbus_probe_init);
postcore_initcall(__xenbus_probe_init);
diff --git a/include/xen/platform_pci.h b/include/xen/platform_pci.h
index ced434d..c3c2527 100644
--- a/include/xen/platform_pci.h
+++ b/include/xen/platform_pci.h
@@ -29,19 +29,9 @@
#define XEN_IOPORT_LINUX_PRODNUM 0xffff
#define XEN_IOPORT_LINUX_DRVVER ((LINUX_VERSION_CODE << 8) + 0x0)
-#ifdef CONFIG_XEN_PLATFORM_PCI
-unsigned long alloc_xen_mmio(unsigned long len);
-void platform_pci_resume(void);
-void platform_pci_disable_irq(void);
-void platform_pci_enable_irq(void);
-#else
-static inline unsigned long alloc_xen_mmio(unsigned long len)
-{
- return ~0UL;
-}
-static inline void platform_pci_resume(void) {}
-static inline void platform_pci_disable_irq(void) {}
-static inline void platform_pci_enable_irq(void) {}
-#endif
+extern unsigned long (*alloc_xen_mmio_hook)(unsigned long len);
+extern void (*platform_pci_resume_hook)(void);
+extern void (*platform_pci_disable_irq_hook)(void);
+extern void (*platform_pci_enable_irq_hook)(void);
#endif /* _XEN_PLATFORM_PCI_H */
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