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xen: Add suspend/resume support for PV on HVM guests.

Browse source 
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>
This commit is contained in:
Stefano Stabellini 2010-05-14 12:45:07 +01:00 • committed by Jeremy Fitzhardinge
parent 183d03cc4f
commit 016b6f5fe8
6 changed files with 90 additions and 11 deletions
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22
drivers/xen/platform-pci.c
View file

@ -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)