From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: 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 V3 05/13] arm64/mm: Add FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2]
Date: Thu, 30 Sep 2021 16:05:08 +0530 [thread overview]
Message-ID: <1632998116-11552-6-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1632998116-11552-1-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).
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
next prev parent reply other threads:[~2021-09-30 10:34 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-30 10:35 [RFC V3 00/13] arm64/mm: Enable FEAT_LPA2 (52 bits PA support on 4K|16K pages) Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 01/13] arm64/mm: Dynamically initialize protection_map[] Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 02/13] arm64/mm: Consolidate TCR_EL1 fields Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 03/13] arm64/mm: Add FEAT_LPA2 specific TCR_EL1.DS field Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 04/13] arm64/mm: Add FEAT_LPA2 specific VTCR_EL2.DS field Anshuman Khandual
2021-09-30 10:35 ` Anshuman Khandual [this message]
2021-09-30 10:35 ` [RFC V3 06/13] arm64/mm: Add CONFIG_ARM64_PA_BITS_52_[LPA|LPA2] Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 07/13] arm64/mm: Add FEAT_LPA2 specific encoding Anshuman Khandual
2021-10-12 10:41 ` Suzuki K Poulose
2021-10-13 2:55 ` Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 08/13] arm64/mm: Detect and enable FEAT_LPA2 Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 09/13] arm64/mm: Add __cpu_secondary_check52bitpa() Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 10/13] arm64/mm: Add FEAT_LPA2 specific PTE_SHARED and PMD_SECT_S Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 11/13] arm64/mm: Add FEAT_LPA2 specific fallback (48 bits PA) when not implemented Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 12/13] arm64/mm: Enable CONFIG_ARM64_PA_BITS_52 on CONFIG_ARM64_[4K|16K]_PAGES Anshuman Khandual
2021-09-30 10:35 ` [RFC V3 13/13] KVM: arm64: Enable FEAT_LPA2 based 52 bits IPA size on 4K and 16K Anshuman Khandual
2021-10-11 10:16 ` Marc Zyngier
2021-10-12 4:24 ` Anshuman Khandual
2021-10-12 8:30 ` Marc Zyngier
2021-10-13 3:28 ` Anshuman Khandual
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