[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen staging-4.14] VT-d: fix add/remove ordering when RMRRs are in use
commit 419a09377dd4e442d163b63404f6bc64a57a3603 Author: Jan Beulich <jbeulich@xxxxxxxx> AuthorDate: Tue Apr 5 15:10:10 2022 +0200 Commit: Jan Beulich <jbeulich@xxxxxxxx> CommitDate: Tue Apr 5 15:10:10 2022 +0200 VT-d: fix add/remove ordering when RMRRs are in use In the event that the RMRR mappings are essential for device operation, they should be established before updating the device's context entry, while they should be torn down only after the device's context entry was successfully cleared. Also switch to %pd in related log messages. Fixes: fa88cfadf918 ("vt-d: Map RMRR in intel_iommu_add_device() if the device has RMRR") Fixes: 8b99f4400b69 ("VT-d: fix RMRR related error handling") Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx> Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx> master commit: 3221f270cf2eba0a22fd4f92319d664eacb92889 master date: 2022-04-05 14:16:10 +0200 --- xen/drivers/passthrough/vtd/iommu.c | 27 ++++++++++++++------------- 1 file changed, 14 insertions(+), 13 deletions(-) diff --git a/xen/drivers/passthrough/vtd/iommu.c b/xen/drivers/passthrough/vtd/iommu.c index 1bf33f0177..c4c94c41f7 100644 --- a/xen/drivers/passthrough/vtd/iommu.c +++ b/xen/drivers/passthrough/vtd/iommu.c @@ -2000,14 +2000,6 @@ static int intel_iommu_add_device(u8 devfn, struct pci_dev *pdev) if ( !pdev->domain ) return -EINVAL; - ret = domain_context_mapping(pdev->domain, devfn, pdev); - if ( ret ) - { - dprintk(XENLOG_ERR VTDPREFIX, "d%d: context mapping failed\n", - pdev->domain->domain_id); - return ret; - } - for_each_rmrr_device ( rmrr, bdf, i ) { if ( rmrr->segment == pdev->seg && @@ -2024,12 +2016,17 @@ static int intel_iommu_add_device(u8 devfn, struct pci_dev *pdev) rmrr->base_address, rmrr->end_address, 0); if ( ret ) - dprintk(XENLOG_ERR VTDPREFIX, "d%d: RMRR mapping failed\n", - pdev->domain->domain_id); + dprintk(XENLOG_ERR VTDPREFIX, "%pd: RMRR mapping failed\n", + pdev->domain); } } - return 0; + ret = domain_context_mapping(pdev->domain, devfn, pdev); + if ( ret ) + dprintk(XENLOG_ERR VTDPREFIX, "%pd: context mapping failed\n", + pdev->domain); + + return ret; } static int intel_iommu_enable_device(struct pci_dev *pdev) @@ -2051,11 +2048,15 @@ static int intel_iommu_remove_device(u8 devfn, struct pci_dev *pdev) { struct acpi_rmrr_unit *rmrr; u16 bdf; - int i; + int ret, i; if ( !pdev->domain ) return -EINVAL; + ret = domain_context_unmap(pdev->domain, devfn, pdev); + if ( ret ) + return ret; + for_each_rmrr_device ( rmrr, bdf, i ) { if ( rmrr->segment != pdev->seg || @@ -2071,7 +2072,7 @@ static int intel_iommu_remove_device(u8 devfn, struct pci_dev *pdev) rmrr->end_address, 0); } - return domain_context_unmap(pdev->domain, devfn, pdev); + return 0; } static int __hwdom_init setup_hwdom_device(u8 devfn, struct pci_dev *pdev) -- generated by git-patchbot for /home/xen/git/xen.git#staging-4.14
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