From f8bab73515ca5b392680bb033dceeb37b8463e95 Mon Sep 17 00:00:00 2001 From: mark gross Date: Fri, 8 Feb 2008 04:18:38 -0800 Subject: intel-iommu: PMEN support Add support for protected memory enable bits by clearing them if they are set at startup time. Some future boot loaders or firmware could have this bit set after it loads the kernel, and it needs to be cleared if DMA's are going to happen effectively. Signed-off-by: mark gross Acked-by: Muli Ben-Yehuda Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/pci/intel-iommu.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/pci/intel-iommu.h') diff --git a/drivers/pci/intel-iommu.h b/drivers/pci/intel-iommu.h index 0e4862675ad..07f5f6353bd 100644 --- a/drivers/pci/intel-iommu.h +++ b/drivers/pci/intel-iommu.h @@ -140,6 +140,10 @@ static inline void dmar_writeq(void __iomem *addr, u64 val) #define DMA_TLB_IH_NONLEAF (((u64)1) << 6) #define DMA_TLB_MAX_SIZE (0x3f) +/* PMEN_REG */ +#define DMA_PMEN_EPM (((u32)1)<<31) +#define DMA_PMEN_PRS (((u32)1)<<0) + /* GCMD_REG */ #define DMA_GCMD_TE (((u32)1) << 31) #define DMA_GCMD_SRTP (((u32)1) << 30) -- cgit