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iommu: Introduce DOMAIN_ATTR_SPLIT_TABLES

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Introduce DOMAIN_ATTR_SPLIT_TABLES for IOMMU domains that will
use the upper portion of the IOVA space, in conjunction with the
lower portion of the IOVA space.

Change-Id: I9d786396f5306f920c1d023bba8c85dce041c83c
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
This commit is contained in:
Isaac J. Manjarres 2020-03-25 00:54:14 -07:00 • committed by Gerrit - the friendly Code Review server
commit eed6ad896c
2 changed files with 4 additions and 1 deletions
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2
drivers/iommu/iommu-debug.c
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@ -84,6 +84,8 @@ static const char *iommu_debug_attr_to_string(enum iommu_attr attr)
return "DOMAIN_ATTR_EARLY_MAP";
case DOMAIN_ATTR_CB_STALL_DISABLE:
return "DOMAIN_ATTR_CB_STALL_DISABLE";
case DOMAIN_ATTR_SPLIT_TABLES:
return "DOMAIN_ATTR_SPLIT_TABLES";
default:
return "Unknown attr!";
}

3
include/linux/iommu.h
View file

@ -189,7 +189,8 @@ enum iommu_attr {
#define DOMAIN_ATTR_CB_STALL_DISABLE (EXTENDED_ATTR_BASE + 17)
#define DOMAIN_ATTR_USE_LLC_NWA (EXTENDED_ATTR_BASE + 18)
#define DOMAIN_ATTR_NO_CFRE (EXTENDED_ATTR_BASE + 19)
#define DOMAIN_ATTR_EXTENDED_MAX (EXTENDED_ATTR_BASE + 20)
#define DOMAIN_ATTR_SPLIT_TABLES (EXTENDED_ATTR_BASE + 20)
#define DOMAIN_ATTR_EXTENDED_MAX (EXTENDED_ATTR_BASE + 21)
/* These are the possible reserved region types */
enum iommu_resv_type {