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[v2,02/19] arm64/mm: Add FEAT_LPA2 specific TCR_EL1.DS field

Message ID 20221124123932.2648991-3-ardb@kernel.org (mailing list archive)
State New, archived
Headers show
Series arm64: Enable LPA2 support for 4k and 16k pages | expand

Commit Message

Ard Biesheuvel Nov. 24, 2022, 12:39 p.m. UTC 
From: Anshuman Khandual <anshuman.khandual@arm.com>

As per ARM ARM (0487G.A) TCR_EL1.DS fields controls whether 52 bit input
and output address get supported on 4K and 16K page size configuration,
when FEAT_LPA2 is known to have been implemented. This adds TCR_DS field
definition which would be used when FEAT_LPA2 gets enabled.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/arm64/include/asm/pgtable-hwdef.h | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index f658aafc47df..c4ad7fbb12c5 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -276,6 +276,7 @@ 
 #define TCR_E0PD1		(UL(1) << 56)
 #define TCR_TCMA0		(UL(1) << 57)
 #define TCR_TCMA1		(UL(1) << 58)
+#define TCR_DS			(UL(1) << 59)
 
 /*
  * TTBR.