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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-05-14 12:45:07 +0100 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-07-22 16:46:21 -0700 |
| commit | 016b6f5fe8398b0291cece60b749d7c930a2e09c (patch) | |
| tree | 430e9aad74f223dc5d144b60f4b78a0c3fb9cdfd /drivers/xen/platform-pci.c | |
| parent | 183d03cc4ff39e0f0d952c09aa96d0abfd6e0c3c (diff) | |
| download | linux-016b6f5fe8398b0291cece60b749d7c930a2e09c.tar.bz2 | |
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.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c index a0ee5d06f715..bdb44f2473e8 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) |