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Message-ID: <1229350685-3816-3-git-send-email-joerg.roedel@amd.com> Date: Mon, 15 Dec 2008 15:17:45 +0100 From: Joerg Roedel <joerg.roedel@....com> To: iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org CC: Joerg Roedel <joerg.roedel@....com> Subject: [PATCH 02/22] AMD IOMMU: allocate a new protection for hotplugged devices Impact: also hotplug devices benefit from device isolation Signed-off-by: Joerg Roedel <joerg.roedel@....com> --- arch/x86/kernel/amd_iommu.c | 17 +++++++++++++++++ 1 files changed, 17 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 1694415..cebbf58 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -922,6 +922,8 @@ static int device_change_notifier(struct notifier_block *nb, struct protection_domain *domain; struct dma_ops_domain *dma_domain; struct amd_iommu *iommu; + int order = amd_iommu_aperture_order; + unsigned long flags; if (devid > amd_iommu_last_bdf) goto out; @@ -954,6 +956,21 @@ static int device_change_notifier(struct notifier_block *nb, goto out; detach_device(domain, devid); break; + case BUS_NOTIFY_ADD_DEVICE: + /* allocate a protection domain if a device is added */ + dma_domain = find_protection_domain(devid); + if (dma_domain) + goto out; + dma_domain = dma_ops_domain_alloc(iommu, order); + if (!dma_domain) + goto out; + dma_domain->target_dev = devid; + + spin_lock_irqsave(&iommu_pd_list_lock, flags); + list_add_tail(&dma_domain->list, &iommu_pd_list); + spin_unlock_irqrestore(&iommu_pd_list_lock, flags); + + break; default: goto out; } -- 1.5.6.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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