diff options
Diffstat (limited to '0004-VT-d-refuse-to-use-IOMMU-with-reserved-CAP.ND-value.patch')
| -rw-r--r-- | 0004-VT-d-refuse-to-use-IOMMU-with-reserved-CAP.ND-value.patch | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/0004-VT-d-refuse-to-use-IOMMU-with-reserved-CAP.ND-value.patch b/0004-VT-d-refuse-to-use-IOMMU-with-reserved-CAP.ND-value.patch deleted file mode 100644 index a4d229a..0000000 --- a/0004-VT-d-refuse-to-use-IOMMU-with-reserved-CAP.ND-value.patch +++ /dev/null @@ -1,49 +0,0 @@ -From b378ee56c7e0bb5eeb35dcc55b3d29e5f50eb566 Mon Sep 17 00:00:00 2001 -From: Jan Beulich <jbeulich@suse.com> -Date: Tue, 7 Jun 2022 13:58:16 +0200 -Subject: [PATCH 04/51] VT-d: refuse to use IOMMU with reserved CAP.ND value -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -The field taking the value 7 (resulting in 18-bit DIDs when using the -calculation in cap_ndoms(), when the DID fields are only 16 bits wide) -is reserved. Instead of misbehaving in case we would encounter such an -IOMMU, refuse to use it. - -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: Roger Pau Monné <roger.pau@citrix.com> -Reviewed-by: Kevin Tian <kevin.tian@intel.com> -master commit: a1545fbf45c689aff39ce76a6eaa609d32ef72a7 -master date: 2022-04-20 10:54:26 +0200 ---- - xen/drivers/passthrough/vtd/iommu.c | 4 +++- - 1 file changed, 3 insertions(+), 1 deletion(-) - -diff --git a/xen/drivers/passthrough/vtd/iommu.c b/xen/drivers/passthrough/vtd/iommu.c -index 93dd8aa643aa..8975c1de61bc 100644 ---- a/xen/drivers/passthrough/vtd/iommu.c -+++ b/xen/drivers/passthrough/vtd/iommu.c -@@ -1279,8 +1279,11 @@ int __init iommu_alloc(struct acpi_drhd_unit *drhd) - - quirk_iommu_caps(iommu); - -+ nr_dom = cap_ndoms(iommu->cap); -+ - if ( cap_fault_reg_offset(iommu->cap) + - cap_num_fault_regs(iommu->cap) * PRIMARY_FAULT_REG_LEN >= PAGE_SIZE || -+ ((nr_dom - 1) >> 16) /* I.e. cap.nd > 6 */ || - ecap_iotlb_offset(iommu->ecap) >= PAGE_SIZE ) - { - printk(XENLOG_ERR VTDPREFIX "IOMMU: unsupported\n"); -@@ -1305,7 +1308,6 @@ int __init iommu_alloc(struct acpi_drhd_unit *drhd) - vtd_ops.sync_cache = sync_cache; - - /* allocate domain id bitmap */ -- nr_dom = cap_ndoms(iommu->cap); - iommu->domid_bitmap = xzalloc_array(unsigned long, BITS_TO_LONGS(nr_dom)); - if ( !iommu->domid_bitmap ) - return -ENOMEM; --- -2.35.1 - |