search for: pci_msix_vector_bitmask

...de doesn''t preserve the other bits anyway, doing * this is pointless. So for now just discard the write (also * saving us from having to determine the matching irq_desc). */ spin_lock_irqsave(&desc->lock, flags); orig = readl(virt); val &= ~PCI_MSIX_VECTOR_BITMASK; val |= orig & PCI_MSIX_VECTOR_BITMASK; writel(val, virt); spin_unlock_irqrestore(&desc->lock, flags); #endif r = X86EMUL_OKAY; Thanks. Chien

...+ if ( !m_desc || m_desc->irq < 0 ) + goto out; + + desc = irq_to_desc(m_desc->irq); + if ( !desc ) + goto out; + spin_lock_irqsave(&desc->lock, flags); + + if ( !desc->msi_desc ) + goto unlock; + orig = readl(virt); - val &= ~PCI_MSIX_VECTOR_BITMASK; - val |= orig & PCI_MSIX_VECTOR_BITMASK; + + /* + * Do not allow guest to modify MSI-X control bit if it is masked + * by Xen. We''ll only handle the case where Xen thinks that + * bit is unmasked, but hardware has silently masked the bit + * (in case of SR-IOV V...

...goto out; + + desc = irq_to_desc(msi_desc->irq); + if ( !desc ) + goto out; + spin_lock_irqsave(&desc->lock, flags); + + if ( !desc->msi_desc ) + goto unlock; + + ASSERT(msi_desc == desc->msi_desc); + orig = readl(virt); - val &= ~PCI_MSIX_VECTOR_BITMASK; - val |= orig & PCI_MSIX_VECTOR_BITMASK; + + /* + * Do not allow guest to modify MSI-X control bit if it is masked + * by Xen. We''ll only handle the case where Xen thinks that + * bit is unmasked, but hardware has silently masked the bit + * (in case of SR-IOV V...

patch revision history ---------------------- v1: Initial patch to handle this issue involving changing the hypercall interface v2:Totally handled inside hypervisor. v3:Change some logics of handling msi-x pending unmask operations. v4:Some changes related to coding style according to Andrew Cooper''s comments v5:Some changes according to Jan''s comments, including a) remove

patch revision history ---------------------- v1: Initial patch to handle this issue involving changing the hypercall interface v2:Totally handled inside hypervisor. v3:Change some logics of handling msi-x pending unmask operations. v4:Some changes related to coding style according to Andrew Cooper''s comments From 51c5b7f1f9c8f319da8adf021b39e18fbd3bf314 Mon Sep 17 00:00:00 2001 From: