Messages in this thread Patch in this message |  | | Date | Mon, 8 Jun 2015 06:44:54 -0700 | From | tip-bot for Feng Wu <> | Subject | [tip:x86/apic] iommu, x86: Add cap_pi_support() to detect VT-d PI capability |
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Commit-ID: 948f4ea26d44a64e315225299155af82e213ebed Gitweb: http://git.kernel.org/tip/948f4ea26d44a64e315225299155af82e213ebed Author: Feng Wu <feng.wu@intel.com> AuthorDate: Fri, 5 Jun 2015 13:42:51 +0800 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Mon, 8 Jun 2015 15:41:32 +0200
iommu, x86: Add cap_pi_support() to detect VT-d PI capability
Add helper function to detect VT-d Posted-Interrupts capability.
Signed-off-by: Feng Wu <feng.wu@intel.com> Reviewed-by: Jiang Liu <jiang.liu@linux.intel.com> Acked-by: David Woodhouse <David.Woodhouse@intel.com> Acked-by: Joerg Roedel <joro@8bytes.org> Cc: iommu@lists.linux-foundation.org Cc: dwmw2@infradead.org Link: http://lkml.kernel.org/r/1433482974-14614-7-git-send-email-feng.wu@intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- include/linux/intel-iommu.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 0af9b03..0c251be 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -87,6 +87,7 @@ static inline void dmar_writeq(void __iomem *addr, u64 val) /* * Decoding Capability Register */ +#define cap_pi_support(c) (((c) >> 59) & 1) #define cap_read_drain(c) (((c) >> 55) & 1) #define cap_write_drain(c) (((c) >> 54) & 1) #define cap_max_amask_val(c) (((c) >> 48) & 0x3f)
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