From mboxrd@z Thu Jan 1 00:00:00 1970 From: Feng Wu Subject: [RFC v1 07/15] vt-d: Add API to update IRTE when VT-d PI is used Date: Wed, 25 Mar 2015 20:31:49 +0800 Message-ID: <1427286717-4093-8-git-send-email-feng.wu@intel.com> References: <1427286717-4093-1-git-send-email-feng.wu@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1427286717-4093-1-git-send-email-feng.wu@intel.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org Cc: yang.z.zhang@intel.com, Feng Wu , kevin.tian@intel.com, keir@xen.org, JBeulich@suse.com List-Id: xen-devel@lists.xenproject.org This patch adds an API which is used to update the IRTE for posted-interrupt when guest changes MSI/MSI-X information. Signed-off-by: Feng Wu --- xen/drivers/passthrough/vtd/intremap.c | 83 ++++++++++++++++++++++++++++++++++ xen/drivers/passthrough/vtd/iommu.h | 3 ++ xen/include/asm-x86/iommu.h | 2 + 3 files changed, 88 insertions(+) diff --git a/xen/drivers/passthrough/vtd/intremap.c b/xen/drivers/passthrough/vtd/intremap.c index 0333686..f44e74d 100644 --- a/xen/drivers/passthrough/vtd/intremap.c +++ b/xen/drivers/passthrough/vtd/intremap.c @@ -898,3 +898,86 @@ void iommu_disable_x2apic_IR(void) for_each_drhd_unit ( drhd ) disable_qinval(drhd->iommu); } + +/* + * This function is used to update the IRTE for posted-interrupt + * when guest changes MSI/MSI-X information + */ +int pi_update_irte(struct vcpu *v, struct pirq *pirq, uint32_t gvec ) +{ + struct irq_desc *desc; + struct msi_desc *msi_desc; + int remap_index, rc = -1; + struct pci_dev *pci_dev; + struct acpi_drhd_unit *drhd; + struct iommu *iommu; + struct ir_ctrl *ir_ctrl; + struct iremap_entry *iremap_entries = NULL, *p = NULL; + struct iremap_entry new_ire; + struct pi_desc *pi_desc = &v->arch.hvm_vmx.pi_desc; + unsigned long flags; + + desc = pirq_spin_lock_irq_desc(pirq, NULL); + if ( !desc ) + return -1; + + msi_desc = desc->msi_desc; + if ( !msi_desc ) + goto unlock_out; + + remap_index = msi_desc->remap_index; + pci_dev = msi_desc->dev; + if ( !pci_dev ) + goto unlock_out; + + drhd = acpi_find_matched_drhd_unit(pci_dev); + if (!drhd) + { + dprintk(XENLOG_INFO VTDPREFIX, "failed to get drhd!\n"); + goto unlock_out; + } + + iommu = drhd->iommu; + ir_ctrl = iommu_ir_ctrl(iommu); + if ( !ir_ctrl ) + { + dprintk(XENLOG_INFO VTDPREFIX, "failed to get ir_ctrl!\n"); + goto unlock_out; + } + + spin_lock_irqsave(&ir_ctrl->iremap_lock, flags); + + GET_IREMAP_ENTRY(ir_ctrl->iremap_maddr, remap_index, iremap_entries, p); + + memcpy(&new_ire, p, sizeof(struct iremap_entry)); + + /* Setup/Update interrupt remapping table entry */ + new_ire.lo_intpost.urg = 0; + new_ire.lo_intpost.vector = gvec; + new_ire.lo_intpost.pda_l = (((u64)virt_to_maddr(pi_desc)) >> + (32 - PDA_LOW_BIT)) & ~(-1UL << PDA_LOW_BIT); + new_ire.hi_intpost.pda_h = (((u64)virt_to_maddr(pi_desc)) >> 32) & + ~(-1UL << PDA_HIGH_BIT); + + new_ire.lo_intpost.res_1 = 0; + new_ire.lo_intpost.res_2 = 0; + new_ire.lo_intpost.res_3 = 0; + new_ire.hi_intpost.res_1 = 0; + + new_ire.lo_intpost.im = 1; + + memcpy(p, &new_ire, sizeof(struct iremap_entry)); + iommu_flush_cache_entry(p, sizeof(struct iremap_entry)); + iommu_flush_iec_index(iommu, 0, remap_index); + + if ( iremap_entries ) + unmap_vtd_domain_page(iremap_entries); + + spin_unlock_irqrestore(&ir_ctrl->iremap_lock, flags); + + rc = 0; + unlock_out: + spin_unlock_irq(&desc->lock); + + return rc; +} diff --git a/xen/drivers/passthrough/vtd/iommu.h b/xen/drivers/passthrough/vtd/iommu.h index cd61e12..ffa72c8 100644 --- a/xen/drivers/passthrough/vtd/iommu.h +++ b/xen/drivers/passthrough/vtd/iommu.h @@ -334,6 +334,9 @@ struct iremap_entry { }; }; +#define PDA_LOW_BIT 26 +#define PDA_HIGH_BIT 32 + /* Max intr remapping table page order is 8, as max number of IRTEs is 64K */ #define IREMAP_PAGE_ORDER 8 diff --git a/xen/include/asm-x86/iommu.h b/xen/include/asm-x86/iommu.h index e7a65da..d233621 100644 --- a/xen/include/asm-x86/iommu.h +++ b/xen/include/asm-x86/iommu.h @@ -32,6 +32,8 @@ int iommu_supports_eim(void); int iommu_enable_x2apic_IR(void); void iommu_disable_x2apic_IR(void); +int pi_update_irte(struct vcpu *v, struct pirq *pirq, uint32_t gvec); + #endif /* !__ARCH_X86_IOMMU_H__ */ /* * Local variables: -- 2.1.0