[RFC 03/10] arm64/mm: Add FEAT_LPA2 specific TCR_EL1.DS field

From: Anshuman Khandual
Date: Tue Jul 13 2021 - 22:21:18 EST


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.

Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
---
arch/arm64/include/asm/pgtable-hwdef.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index 66671ff..1eb5574 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -275,6 +275,7 @@
#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.
--
2.7.4