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| author | Jan Beulich <jbeulich@suse.com> | 2013-08-08 11:12:14 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2013-08-08 11:12:14 +0200 |
| commit | d1b6d0a02489c2d0e237d03e1d8af8d11df53b05 (patch) | |
| tree | 63f46916a9ffd60319ae7da560bee26bc00b456b /xen/include/asm-x86/msi.h | |
| parent | fe6df5abc40ba9928b25e84a9e2aa7434ce76283 (diff) | |
| download | xen-d1b6d0a02489c2d0e237d03e1d8af8d11df53b05.tar.gz xen-d1b6d0a02489c2d0e237d03e1d8af8d11df53b05.tar.bz2 xen-d1b6d0a02489c2d0e237d03e1d8af8d11df53b05.zip | |
x86: enable multi-vector MSI
This implies
- extending the public interface to have a way to request a block of
MSIs
- allocating a block of contiguous pIRQ-s for the target domain (but
note that the Xen IRQs allocated have no need of being contiguous)
- repeating certain operations for all involved IRQs
- fixing multi_msi_enable()
- adjusting the mask bit accesses for maskable MSIs
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Keir Fraser <keir@xen.org>
Diffstat (limited to 'xen/include/asm-x86/msi.h')
| -rw-r--r-- | xen/include/asm-x86/msi.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/xen/include/asm-x86/msi.h b/xen/include/asm-x86/msi.h index 394ef0ef42..06e68533d3 100644 --- a/xen/include/asm-x86/msi.h +++ b/xen/include/asm-x86/msi.h @@ -148,7 +148,7 @@ int msi_free_irq(struct msi_desc *entry); #define multi_msi_capable(control) \ (1 << ((control & PCI_MSI_FLAGS_QMASK) >> 1)) #define multi_msi_enable(control, num) \ - control |= (((num >> 1) << 4) & PCI_MSI_FLAGS_QSIZE); + control |= (((fls(num) - 1) << 4) & PCI_MSI_FLAGS_QSIZE); #define is_64bit_address(control) (!!(control & PCI_MSI_FLAGS_64BIT)) #define is_mask_bit_support(control) (!!(control & PCI_MSI_FLAGS_MASKBIT)) #define msi_enable(control, num) multi_msi_enable(control, num); \ |