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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2010-05-14 12:45:07 +0100
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2010-07-22 16:46:21 -0700
commit016b6f5fe8398b0291cece60b749d7c930a2e09c (patch)
tree430e9aad74f223dc5d144b60f4b78a0c3fb9cdfd /drivers/xen/platform-pci.c
parent183d03cc4ff39e0f0d952c09aa96d0abfd6e0c3c (diff)
downloadop-kernel-dev-016b6f5fe8398b0291cece60b749d7c930a2e09c.zip
op-kernel-dev-016b6f5fe8398b0291cece60b749d7c930a2e09c.tar.gz
xen: Add suspend/resume support for PV on HVM guests.
Suspend/resume requires few different things on HVM: the suspend hypercall is different; we don't need to save/restore memory related settings; except the shared info page and the callback mechanism. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'drivers/xen/platform-pci.c')
-rw-r--r--drivers/xen/platform-pci.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c
index a0ee5d0..bdb44f2 100644
--- a/drivers/xen/platform-pci.c
+++ b/drivers/xen/platform-pci.c
@@ -31,6 +31,7 @@
#include <xen/xenbus.h>
#include <xen/events.h>
#include <xen/hvm.h>
+#include <xen/xen-ops.h>
#define DRV_NAME "xen-platform-pci"
@@ -41,6 +42,7 @@ MODULE_LICENSE("GPL");
static unsigned long platform_mmio;
static unsigned long platform_mmio_alloc;
static unsigned long platform_mmiolen;
+static uint64_t callback_via;
unsigned long alloc_xen_mmio(unsigned long len)
{
@@ -85,13 +87,25 @@ static int xen_allocate_irq(struct pci_dev *pdev)
"xen-platform-pci", pdev);
}
+static int platform_pci_resume(struct pci_dev *pdev)
+{
+ int err;
+ if (xen_have_vector_callback)
+ return 0;
+ err = xen_set_callback_via(callback_via);
+ if (err) {
+ dev_err(&pdev->dev, "platform_pci_resume failure!\n");
+ return err;
+ }
+ return 0;
+}
+
static int __devinit platform_pci_init(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int i, ret;
long ioaddr, iolen;
long mmio_addr, mmio_len;
- uint64_t callback_via;
unsigned int max_nr_gframes;
i = pci_enable_device(pdev);
@@ -148,6 +162,9 @@ static int __devinit platform_pci_init(struct pci_dev *pdev,
if (ret)
goto out;
xenbus_probe(NULL);
+ ret = xen_setup_shutdown_event();
+ if (ret)
+ goto out;
return 0;
out:
@@ -171,6 +188,9 @@ static struct pci_driver platform_driver = {
.name = DRV_NAME,
.probe = platform_pci_init,
.id_table = platform_pci_tbl,
+#ifdef CONFIG_PM
+ .resume_early = platform_pci_resume,
+#endif
};
static int __init platform_pci_module_init(void)
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