diff options
| author | Olaf Hering <olaf@aepfle.de> | 2012-03-16 11:34:41 +0100 |
|---|---|---|
| committer | Olaf Hering <olaf@aepfle.de> | 2012-03-16 11:34:41 +0100 |
| commit | 6fabc84127a2ab606af29a1b9c1c545b3749093f (patch) | |
| tree | 06f29689aacd9e376dc77da9b498581c317370c1 /unmodified_drivers | |
| parent | 3b2b46d747bc5e3a56a87fc4d5611b649c716ccd (diff) | |
| download | xen-6fabc84127a2ab606af29a1b9c1c545b3749093f.tar.gz xen-6fabc84127a2ab606af29a1b9c1c545b3749093f.tar.bz2 xen-6fabc84127a2ab606af29a1b9c1c545b3749093f.zip | |
unmodified drivers: add pfn_is_ram helper for kdump
Register pfn_is_ram helper speed up reading /proc/vmcore in the kdump
kernel. It is compiled only if the kernel source is recent enough to
have the pfn_is_ram helper (v3.0-rc1, commit
997c136f518c5debd63847e78e2a8694f56dcf90).
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Jan Beulich <jbeulich@suse.com>
Diffstat (limited to 'unmodified_drivers')
| -rw-r--r-- | unmodified_drivers/linux-2.6/platform-pci/platform-pci.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c b/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c index f36179ffe5..7e988a5e33 100644 --- a/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c +++ b/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c @@ -351,6 +351,32 @@ static int check_platform_magic(struct device *dev, long ioaddr, long iolen) return -ENODEV; } +#ifdef HAVE_OLDMEM_PFN_IS_RAM +static int xen_oldmem_pfn_is_ram(unsigned long pfn) +{ + struct xen_hvm_get_mem_type a; + int ret; + + a.domid = DOMID_SELF; + a.pfn = pfn; + if (HYPERVISOR_hvm_op(HVMOP_get_mem_type, &a)) + return -ENXIO; + + switch (a.mem_type) { + case HVMMEM_mmio_dm: + ret = 0; + break; + case HVMMEM_ram_rw: + case HVMMEM_ram_ro: + default: + ret = 1; + break; + } + + return ret; +} +#endif + static int __devinit platform_pci_init(struct pci_dev *pdev, const struct pci_device_id *ent) { @@ -419,6 +445,9 @@ static int __devinit platform_pci_init(struct pci_dev *pdev, if ((ret = xen_panic_handler_init())) goto out; +#ifdef HAVE_OLDMEM_PFN_IS_RAM + register_oldmem_pfn_is_ram(&xen_oldmem_pfn_is_ram); +#endif out: if (ret) { pci_release_region(pdev, 0); |