[RFC V3 05/13] arm64/mm: Add FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2]
From: Anshuman Khandual <hidden>
Date: 2021-09-30 10:34:42
Also in:
lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
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 <redacted> --- 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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