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author | Keir Fraser <keir.fraser@citrix.com> | 2010-07-12 10:43:57 +0100 |
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committer | Keir Fraser <keir.fraser@citrix.com> | 2010-07-12 10:43:57 +0100 |
commit | f94b08c2f634ac5bd4304fa55f4fd37f417064a0 (patch) | |
tree | a4f24025878d49e6587870b51ed5992f186776d0 /xen/arch/x86/msi.c | |
parent | c507b364854c06cc818b62e24ac9df08b92be9ba (diff) | |
download | xen-f94b08c2f634ac5bd4304fa55f4fd37f417064a0.tar.gz xen-f94b08c2f634ac5bd4304fa55f4fd37f417064a0.tar.bz2 xen-f94b08c2f634ac5bd4304fa55f4fd37f417064a0.zip |
x86: allow the MSI-X table to reside beyond 4G even on 32-bit systems
Underlying interfaces allow this, and unduly (and silently) truncating
addresses doesn't seem nice.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Diffstat (limited to 'xen/arch/x86/msi.c')
-rw-r--r-- | xen/arch/x86/msi.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/xen/arch/x86/msi.c b/xen/arch/x86/msi.c index 4f16bf23c4..ec7e5c9c06 100644 --- a/xen/arch/x86/msi.c +++ b/xen/arch/x86/msi.c @@ -57,10 +57,11 @@ static void msix_fixmap_free(int idx) spin_unlock(&msix_fixmap_lock); } -static int msix_get_fixmap(struct pci_dev *dev, unsigned long table_paddr, - unsigned long entry_paddr) +static int msix_get_fixmap(struct pci_dev *dev, u64 table_paddr, + u64 entry_paddr) { - int nr_page, idx; + long nr_page; + int idx; nr_page = (entry_paddr >> PAGE_SHIFT) - (table_paddr >> PAGE_SHIFT); @@ -536,7 +537,7 @@ static int msix_capability_init(struct pci_dev *dev, struct msi_desc *entry; int pos; u16 control; - unsigned long table_paddr, entry_paddr; + u64 table_paddr, entry_paddr; u32 table_offset, entry_offset; u8 bir; void __iomem *base; @@ -571,7 +572,8 @@ static int msix_capability_init(struct pci_dev *dev, xfree(entry); return idx; } - base = (void *)(fix_to_virt(idx) + (entry_paddr & ((1UL << PAGE_SHIFT) - 1))); + base = (void *)(fix_to_virt(idx) + + ((unsigned long)entry_paddr & ((1UL << PAGE_SHIFT) - 1))); entry->msi_attrib.type = PCI_CAP_ID_MSIX; entry->msi_attrib.is_64 = 1; |