From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc: akpm@linux-foundation.org, suzuki.poulose@arm.com,
mark.rutland@arm.com, will@kernel.org, catalin.marinas@arm.com,
maz@kernel.org, james.morse@arm.com, steven.price@arm.com,
Anshuman Khandual <anshuman.khandual@arm.com>
Subject: [RFC 04/10] arm64/mm: Add FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2]
Date: Wed, 14 Jul 2021 07:51:25 +0530 [thread overview]
Message-ID: <1626229291-6569-5-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1626229291-6569-1-git-send-email-anshuman.khandual@arm.com>
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).
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 5cbfaf6..deecde0 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -849,16 +849,19 @@
#define ID_AA64MMFR0_TGRAN4_NI 0xf
#define ID_AA64MMFR0_TGRAN4_SUPPORTED 0x0
+#define ID_AA64MMFR0_TGRAN4_LPA2 0x1
#define ID_AA64MMFR0_TGRAN64_NI 0xf
#define ID_AA64MMFR0_TGRAN64_SUPPORTED 0x0
#define ID_AA64MMFR0_TGRAN16_NI 0x0
#define ID_AA64MMFR0_TGRAN16_SUPPORTED 0x1
+#define ID_AA64MMFR0_TGRAN16_LPA2 0x2
#define ID_AA64MMFR0_PARANGE_48 0x5
#define ID_AA64MMFR0_PARANGE_52 0x6
#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
@@ -1030,10 +1033,12 @@
#define ID_AA64MMFR0_TGRAN_SHIFT ID_AA64MMFR0_TGRAN4_SHIFT
#define ID_AA64MMFR0_TGRAN_SUPPORTED_MIN ID_AA64MMFR0_TGRAN4_SUPPORTED
#define ID_AA64MMFR0_TGRAN_SUPPORTED_MAX 0x7
+#define ID_AA64MMFR0_TGRAN_LPA2 ID_AA64MMFR0_TGRAN4_LPA2
#elif defined(CONFIG_ARM64_16K_PAGES)
#define ID_AA64MMFR0_TGRAN_SHIFT ID_AA64MMFR0_TGRAN16_SHIFT
#define ID_AA64MMFR0_TGRAN_SUPPORTED_MIN ID_AA64MMFR0_TGRAN16_SUPPORTED
#define ID_AA64MMFR0_TGRAN_SUPPORTED_MAX 0xF
+#define ID_AA64MMFR0_TGRAN_LPA2 ID_AA64MMFR0_TGRAN16_LPA2
#elif defined(CONFIG_ARM64_64K_PAGES)
#define ID_AA64MMFR0_TGRAN_SHIFT ID_AA64MMFR0_TGRAN64_SHIFT
#define ID_AA64MMFR0_TGRAN_SUPPORTED_MIN ID_AA64MMFR0_TGRAN64_SUPPORTED
--
2.7.4
next prev parent reply other threads:[~2021-07-14 2:21 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-14 2:21 [RFC 00/10] arm64/mm: Enable FEAT_LPA2 (52 bits PA support on 4K|16K pages) Anshuman Khandual
2021-07-14 2:21 ` [RFC 01/10] mm/mmap: Dynamically initialize protection_map[] Anshuman Khandual
2021-07-14 2:21 ` [RFC 02/10] arm64/mm: Consolidate TCR_EL1 fields Anshuman Khandual
2021-07-14 2:21 ` [RFC 03/10] arm64/mm: Add FEAT_LPA2 specific TCR_EL1.DS field Anshuman Khandual
2021-07-14 2:21 ` Anshuman Khandual [this message]
2021-07-14 2:21 ` [RFC 05/10] arm64/mm: Add CONFIG_ARM64_PA_BITS_52_[LPA|LPA2] Anshuman Khandual
2021-07-14 2:21 ` [RFC 06/10] arm64/mm: Add FEAT_LPA2 specific encoding Anshuman Khandual
2021-07-14 15:38 ` Steven Price
2021-07-16 7:20 ` Anshuman Khandual
2021-07-16 10:02 ` Steven Price
2021-07-16 14:37 ` Anshuman Khandual
2021-07-14 2:21 ` [RFC 07/10] arm64/mm: Detect and enable FEAT_LPA2 Anshuman Khandual
2021-07-14 8:21 ` Suzuki K Poulose
2021-07-16 7:06 ` Anshuman Khandual
2021-07-16 8:08 ` Suzuki K Poulose
2021-07-19 4:47 ` Anshuman Khandual
2021-07-14 2:21 ` [RFC 08/10] arm64/mm: Add FEAT_LPA2 specific PTE_SHARED and PMD_SECT_S Anshuman Khandual
2021-07-14 2:21 ` [RFC 09/10] arm64/mm: Add FEAT_LPA2 specific fallback (48 bits PA) when not implemented Anshuman Khandual
2021-07-14 2:21 ` [RFC 10/10] arm64/mm: Enable CONFIG_ARM64_PA_BITS_52 on CONFIG_ARM64_[4K|16K]_PAGES Anshuman Khandual
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