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Subject[RFC V3 05/13] arm64/mm: Add FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2]
Date
PAGE_SIZE support is tested against possible minimum and maximum values for
its respective ID_AA64MMFR0.TGRAN field, depending on whether it is signed
or unsigned. But then FEAT_LPA2 implementation needs to be validated for 4K
and 16K page sizes via feature specific ID_AA64MMFR0.TGRAN values. Hence it
adds FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2] values per ARM ARM (0487G.A).

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
arch/arm64/include/asm/sysreg.h | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 4630eac..334d91f 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -850,12 +850,14 @@
#define ID_AA64MMFR0_ASID_16 0x2

#define ID_AA64MMFR0_TGRAN4_NI 0xf
+#define ID_AA64MMFR0_TGRAN4_LPA2 0x1
#define ID_AA64MMFR0_TGRAN4_SUPPORTED_MIN 0x0
#define ID_AA64MMFR0_TGRAN4_SUPPORTED_MAX 0x7
#define ID_AA64MMFR0_TGRAN64_NI 0xf
#define ID_AA64MMFR0_TGRAN64_SUPPORTED_MIN 0x0
#define ID_AA64MMFR0_TGRAN64_SUPPORTED_MAX 0x7
#define ID_AA64MMFR0_TGRAN16_NI 0x0
+#define ID_AA64MMFR0_TGRAN16_LPA2 0x2
#define ID_AA64MMFR0_TGRAN16_SUPPORTED_MIN 0x1
#define ID_AA64MMFR0_TGRAN16_SUPPORTED_MAX 0xf

@@ -872,6 +874,7 @@
#define ID_AA64MMFR0_TGRAN_2_SUPPORTED_DEFAULT 0x0
#define ID_AA64MMFR0_TGRAN_2_SUPPORTED_NONE 0x1
#define ID_AA64MMFR0_TGRAN_2_SUPPORTED_MIN 0x2
+#define ID_AA64MMFR0_TGRAN_2_SUPPORTED_LPA2 0x3
#define ID_AA64MMFR0_TGRAN_2_SUPPORTED_MAX 0x7

#ifdef CONFIG_ARM64_PA_BITS_52
@@ -1042,11 +1045,13 @@

#if defined(CONFIG_ARM64_4K_PAGES)
#define ID_AA64MMFR0_TGRAN_SHIFT ID_AA64MMFR0_TGRAN4_SHIFT
+#define ID_AA64MMFR0_TGRAN_LPA2 ID_AA64MMFR0_TGRAN4_LPA2
#define ID_AA64MMFR0_TGRAN_SUPPORTED_MIN ID_AA64MMFR0_TGRAN4_SUPPORTED_MIN
#define ID_AA64MMFR0_TGRAN_SUPPORTED_MAX ID_AA64MMFR0_TGRAN4_SUPPORTED_MAX
#define ID_AA64MMFR0_TGRAN_2_SHIFT ID_AA64MMFR0_TGRAN4_2_SHIFT
#elif defined(CONFIG_ARM64_16K_PAGES)
#define ID_AA64MMFR0_TGRAN_SHIFT ID_AA64MMFR0_TGRAN16_SHIFT
+#define ID_AA64MMFR0_TGRAN_LPA2 ID_AA64MMFR0_TGRAN16_LPA2
#define ID_AA64MMFR0_TGRAN_SUPPORTED_MIN ID_AA64MMFR0_TGRAN16_SUPPORTED_MIN
#define ID_AA64MMFR0_TGRAN_SUPPORTED_MAX ID_AA64MMFR0_TGRAN16_SUPPORTED_MAX
#define ID_AA64MMFR0_TGRAN_2_SHIFT ID_AA64MMFR0_TGRAN16_2_SHIFT
--
2.7.4
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