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- "Li, Zhen-Hua"
- "Li, Zhen-Hua"
- "Li, Zhen-Hua"
- "Li, Zhen-Hua"
- "Li, Zhen-Hua"
- "Li, Zhen-Hua"
- "Li, Zhen-Hua"
- "Li, Zhen-Hua"
- "Li, Zhen-Hua"
- "Li, Zhen-Hua"
- "Li, Zhen-Hua"
- Baoquan He
- Dave Young
- "Li, Zhen-Hua"
- "Li, ZhenHua"
- Joerg Roedel
- David Woodhouse
Patch in this message | | | From | "Li, Zhen-Hua" <> | Subject | [PATCH v11 03/10] iommu/vt-d: Function to get existing context entry | Date | Mon, 11 May 2015 17:52:47 +0800 |
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Interface for when a new domain in the old kernel needs some values from the panicked kernel's context entries.
Signed-off-by: Li, Zhen-Hua <zhen-hual@hp.com> --- drivers/iommu/intel-iommu.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 1e7ceb5..07e6118 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -367,6 +367,10 @@ static inline int first_pte_in_page(struct dma_pte *pte) * do the same thing as crashdump kernel. */ +static struct context_entry *device_to_existing_context_entry( + struct intel_iommu *iommu, + u8 bus, u8 devfn); + /* * This domain is a statically identity mapping domain. @@ -4810,3 +4814,22 @@ static void __init check_tylersburg_isoch(void) printk(KERN_WARNING "DMAR: Recommended TLB entries for ISOCH unit is 16; your BIOS set %d\n", vtisochctrl); } + +static struct context_entry *device_to_existing_context_entry( + struct intel_iommu *iommu, + u8 bus, u8 devfn) +{ + struct root_entry *root; + struct context_entry *context; + struct context_entry *ret = NULL; + unsigned long flags; + + spin_lock_irqsave(&iommu->lock, flags); + root = &iommu->root_entry[bus]; + context = get_context_addr_from_root(root); + if (context && context_present(context+devfn)) + ret = &context[devfn]; + spin_unlock_irqrestore(&iommu->lock, flags); + return ret; +} + -- 2.0.0-rc0
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