ia64/xen-unstable

changeset 18880:99f01b8184c7

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VT-d code cleanup

This patch narrow context caching flush range from the
domain-selective to the device-selective, when unmapping a device.

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
author Keir Fraser <keir.fraser@citrix.com>
date Fri Dec 05 10:59:41 2008 +0000 (2008-12-05)
parents 09160c3bd179
children b44e244d7bb9
files xen/drivers/passthrough/vtd/iommu.c
line diff
     1.1 --- a/xen/drivers/passthrough/vtd/iommu.c	Fri Dec 05 15:47:19 2008 +0900
     1.2 +++ b/xen/drivers/passthrough/vtd/iommu.c	Fri Dec 05 10:59:41 2008 +0000
     1.3 @@ -1308,7 +1308,9 @@ static int domain_context_unmap_one(
     1.4      context_clear_entry(*context);
     1.5      iommu_flush_cache_entry(context);
     1.6  
     1.7 -    if ( iommu_flush_context_domain(iommu, domain_iommu_domid(domain), 0) )
     1.8 +    if ( iommu_flush_context_device(iommu, domain_iommu_domid(domain),
     1.9 +                                    (((u16)bus) << 8) | devfn,
    1.10 +                                    DMA_CCMD_MASK_NOBIT, 0) )
    1.11          iommu_flush_write_buffer(iommu);
    1.12      else
    1.13          iommu_flush_iotlb_dsi(iommu, domain_iommu_domid(domain), 0);