diff options
| author | Joerg Roedel <jroedel@suse.de> | 2015-06-12 12:02:09 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2015-06-16 10:59:34 +0200 |
| commit | dbcd861f252d727ac856a3da2cba8a480a36ab2e (patch) | |
| tree | 888c1b9cb3f9a39acc61886c97186698f85853b9 /drivers/iommu | |
| parent | 091d42e43d21b6ca7ec39bf5f9e17bc0bd8d4312 (diff) | |
iommu/vt-d: Do not re-use domain-ids from the old kernel
Mark all domain-ids we find as reserved, so that there could
be no collision between domains from the previous kernel and
our domains in the IOMMU TLB.
Tested-by: ZhenHua Li <zhen-hual@hp.com>
Tested-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 1eb743c700e9..431853386db8 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -273,6 +273,11 @@ static inline void context_set_domain_id(struct context_entry *context, context->hi |= (value & ((1 << 16) - 1)) << 8; } +static inline int context_domain_id(struct context_entry *c) +{ + return((c->hi >> 8) & 0xffff); +} + static inline void context_clear_entry(struct context_entry *context) { context->lo = 0; @@ -2802,7 +2807,7 @@ static int copy_context_table(struct intel_iommu *iommu, int bus, bool ext) { struct context_entry *old_ce = NULL, *new_ce = NULL, ce; - int tbl_idx, pos = 0, idx, devfn, ret = 0; + int tbl_idx, pos = 0, idx, devfn, ret = 0, did; phys_addr_t old_ce_phys; tbl_idx = ext ? bus * 2 : bus; @@ -2857,6 +2862,10 @@ static int copy_context_table(struct intel_iommu *iommu, if (!context_present(&ce)) continue; + did = context_domain_id(&ce); + if (did >= 0 && did < cap_ndoms(iommu->cap)) + set_bit(did, iommu->domain_ids); + new_ce[idx] = ce; } |