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bh=cJO54s7DIDIZBjYPzs3C8whg1R3i4ZDxSSR0xflu0JQ=; b=QKxSar5+3CMaMb+teiFK7fQdg3QbLd+8Qd0OAxKT0vGj9XiAXlCvEClrY1TXaKUVBP4xDGB92cHSlaGJDw0f/CfwAd36kHOJN6pANOrb/hV+wRli2YegKpAGyDnxK9B2WQw9D2dXbqFfb/ENgwH58pmgO8QimiLYwX3BhN1/sDI= X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C From: Ayan Kumar Halder To: CC: , , , , , , , , , , Ayan Kumar Halder Subject: [XEN v8 1/5] xen/arm: p2m: Use the pa_range_info table to support ARM_32 and ARM_64 Date: Fri, 2 Jun 2023 13:07:50 +0100 Message-ID: <20230602120754.23817-2-ayan.kumar.halder@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230602120754.23817-1-ayan.kumar.halder@amd.com> References: <20230602120754.23817-1-ayan.kumar.halder@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT070:EE_|CH0PR12MB5265:EE_ X-MS-Office365-Filtering-Correlation-Id: 2e691522-3180-4783-aff7-08db6362161a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jun 2023 12:08:33.0443 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2e691522-3180-4783-aff7-08db6362161a X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT070.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR12MB5265 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1685707748699100001 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Restructure the code so that one can use pa_range_info[] table for both ARM_32 as well as ARM_64. Also, removed the hardcoding for P2M_ROOT_ORDER and P2M_ROOT_LEVEL as p2m_root_order can be obtained from the pa_range_info[].root_order and p2m_root_level can be obtained from pa_range_info[].sl0. Refer ARM DDI 0406C.d ID040418, B3-1345, "Use of concatenated first-level translation tables ...However, a 40-bit input address range with a translation granularity of = 4KB requires a total of 28 bits of address resolution. Therefore, a stage 2 translation that supports a 40-bit input address range requires two concate= nated first-level translation tables,..." Thus, root-order is 1 for 40-bit IPA on ARM_32. Refer ARM DDI 0406C.d ID040418, B3-1348, "Determining the required first lookup level for stage 2 translations For a stage 2 translation, the output address range from the stage 1 translations determines the required input address range for the stage 2 translation. The permitted values of VTCR.SL0 are: 0b00 Stage 2 translation lookup must start at the second level. 0b01 Stage 2 translation lookup must start at the first level. VTCR.T0SZ must indicate the required input address range. The size of the i= nput address region is 2^(32-T0SZ) bytes." Thus VTCR.SL0 =3D 1 (maximum value) and VTCR.T0SZ =3D -8 when the size of i= nput address region is 2^40 bytes. Thus, pa_range_info[].t0sz =3D 1 (VTCR.S) | 8 (VTCR.T0SZ) ie 11000b which i= s 24. VTCR.T0SZ, is bits [5:0] for ARM_64. VTCR.T0SZ is bits [3:0] and S(sign extension), bit[4] for ARM_32. For this, we have used struct bitfields to convert pa_range_info[].t0sz to = its ARM_32 variant. pa_range_info[] is indexed by ID_AA64MMFR0_EL1.PARange which is present in = Arm64 only. This is the reason we do not specify the indices for ARM_32. Also, we duplicated the entry "{ 40, 24/*24*/, 1, 1 }" between ARM_64= and ARM_32. This is done to avoid introducing extra #if-defs. Signed-off-by: Ayan Kumar Halder Reviewed-by: Michal Orzel --- Changes from - v3 - 1. New patch introduced in v4. 2. Restructure the code such that pa_range_info[] is used both by ARM_32 as well as ARM_64. v4 - 1. Removed the hardcoded definitions of P2M_ROOT_ORDER and P2M_ROOT_LE= VEL. The reason being root_order will not be always 1 (See the next patch). 2. Updated the commit message to explain t0sz, sl0 and root_order values for 32-bit IPA on Arm32. 3. Some sanity fixes. v5 - pa_range_info is indexed by system_cpuinfo.mm64.pa_range. ie when PARange is 0, the PA size is 32, 1 -> 36 and so on. So pa_range_info[]= has been updated accordingly. For ARM_32 pa_range_info[0] =3D 0 and pa_range_info[1] =3D 0 as we do not s= upport 32-bit, 36-bit physical address range yet. v6 - 1. Added pa_range_info[] entries for ARM_32 without indices. Some entry may be duplicated between ARM_64 and ARM_32. 2. Recalculate p2m_ipa_bits for ARM_32 from T0SZ (similar to ARM_64). 3. Introduced an union to reinterpret T0SZ bits between ARM_32 and ARM_64. v7 - 1. Used struct bifield instead of union to reinterpret T0SZ bits betwe= en ARM_32 and ARM_64. 2. Removed the invalid entry for ARM_32. xen/arch/arm/include/asm/p2m.h | 6 ---- xen/arch/arm/p2m.c | 50 +++++++++++++++++++++++++--------- 2 files changed, 37 insertions(+), 19 deletions(-) diff --git a/xen/arch/arm/include/asm/p2m.h b/xen/arch/arm/include/asm/p2m.h index f67e9ddc72..940495d42b 100644 --- a/xen/arch/arm/include/asm/p2m.h +++ b/xen/arch/arm/include/asm/p2m.h @@ -14,16 +14,10 @@ /* Holds the bit size of IPAs in p2m tables. */ extern unsigned int p2m_ipa_bits; =20 -#ifdef CONFIG_ARM_64 extern unsigned int p2m_root_order; extern unsigned int p2m_root_level; #define P2M_ROOT_ORDER p2m_root_order #define P2M_ROOT_LEVEL p2m_root_level -#else -/* First level P2M is always 2 consecutive pages */ -#define P2M_ROOT_ORDER 1 -#define P2M_ROOT_LEVEL 1 -#endif =20 struct domain; =20 diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c index 418997843d..76388ba54b 100644 --- a/xen/arch/arm/p2m.c +++ b/xen/arch/arm/p2m.c @@ -19,9 +19,9 @@ =20 #define INVALID_VMID 0 /* VMID 0 is reserved */ =20 -#ifdef CONFIG_ARM_64 unsigned int __read_mostly p2m_root_order; unsigned int __read_mostly p2m_root_level; +#ifdef CONFIG_ARM_64 static unsigned int __read_mostly max_vmid =3D MAX_VMID_8_BIT; /* VMID is by default 8 bit width on AArch64 */ #define MAX_VMID max_vmid @@ -2247,16 +2247,6 @@ void __init setup_virt_paging(void) /* Setup Stage 2 address translation */ register_t val =3D VTCR_RES1|VTCR_SH0_IS|VTCR_ORGN0_WBWA|VTCR_IRGN0_WB= WA; =20 -#ifdef CONFIG_ARM_32 - if ( p2m_ipa_bits < 40 ) - panic("P2M: Not able to support %u-bit IPA at the moment\n", - p2m_ipa_bits); - - printk("P2M: 40-bit IPA\n"); - p2m_ipa_bits =3D 40; - val |=3D VTCR_T0SZ(0x18); /* 40 bit IPA */ - val |=3D VTCR_SL0(0x1); /* P2M starts at first level */ -#else /* CONFIG_ARM_64 */ static const struct { unsigned int pabits; /* Physical Address Size */ unsigned int t0sz; /* Desired T0SZ, minimum in comment */ @@ -2265,6 +2255,7 @@ void __init setup_virt_paging(void) } pa_range_info[] __initconst =3D { /* T0SZ minimum and SL0 maximum from ARM DDI 0487H.a Table D5-6 */ /* PA size, t0sz(min), root-order, sl0(max) */ +#ifdef CONFIG_ARM_64 [0] =3D { 32, 32/*32*/, 0, 1 }, [1] =3D { 36, 28/*28*/, 0, 1 }, [2] =3D { 40, 24/*24*/, 1, 1 }, @@ -2273,11 +2264,28 @@ void __init setup_virt_paging(void) [5] =3D { 48, 16/*16*/, 0, 2 }, [6] =3D { 52, 12/*12*/, 4, 2 }, [7] =3D { 0 } /* Invalid */ +#else + { 40, 24/*24*/, 1, 1 } +#endif }; =20 unsigned int i; unsigned int pa_range =3D 0x10; /* Larger than any possible value */ =20 +#ifdef CONFIG_ARM_32 + /* + * Typecast pa_range_info[].t0sz into ARM_32 bit variant. + * + * VTCR.T0SZ is bits [3:0] and S(sign extension), bit[4] for ARM_32. + * Thus, pa_range_info[].t0sz is translated to its ARM_32 variant using + * struct bitfields. + */ + struct + { + signed int val:5; + } t0sz_32; +#else + /* * Restrict "p2m_ipa_bits" if needed. As P2M table is always configured * with IPA bits =3D=3D PA bits, compare against "pabits". @@ -2291,6 +2299,7 @@ void __init setup_virt_paging(void) */ if ( system_cpuinfo.mm64.vmid_bits =3D=3D MM64_VMID_16_BITS_SUPPORT ) max_vmid =3D MAX_VMID_16_BIT; +#endif =20 /* Choose suitable "pa_range" according to the resulted "p2m_ipa_bits"= . */ for ( i =3D 0; i < ARRAY_SIZE(pa_range_info); i++ ) @@ -2304,26 +2313,41 @@ void __init setup_virt_paging(void) =20 /* pa_range is 4 bits but we don't support all modes */ if ( pa_range >=3D ARRAY_SIZE(pa_range_info) || !pa_range_info[pa_rang= e].pabits ) - panic("Unknown encoding of ID_AA64MMFR0_EL1.PARange %x\n", pa_rang= e); + { + /* + * In case of ARM_64, we do not support this encoding of + * ID_AA64MMFR0_EL1.PARange + */ + panic("Unsupported value for p2m_ipa_bits =3D 0x%x\n", p2m_ipa_bit= s); + } =20 +#ifdef CONFIG_ARM_64 val |=3D VTCR_PS(pa_range); val |=3D VTCR_TG0_4K; =20 /* Set the VS bit only if 16 bit VMID is supported. */ if ( MAX_VMID =3D=3D MAX_VMID_16_BIT ) val |=3D VTCR_VS; +#endif + val |=3D VTCR_SL0(pa_range_info[pa_range].sl0); val |=3D VTCR_T0SZ(pa_range_info[pa_range].t0sz); =20 p2m_root_order =3D pa_range_info[pa_range].root_order; p2m_root_level =3D 2 - pa_range_info[pa_range].sl0; + +#ifdef CONFIG_ARM_64 p2m_ipa_bits =3D 64 - pa_range_info[pa_range].t0sz; +#else + t0sz_32.val =3D pa_range_info[pa_range].t0sz; + p2m_ipa_bits =3D 32 - t0sz_32.val; +#endif =20 printk("P2M: %d-bit IPA with %d-bit PA and %d-bit VMID\n", p2m_ipa_bits, pa_range_info[pa_range].pabits, ( MAX_VMID =3D=3D MAX_VMID_16_BIT ) ? 16 : 8); -#endif + printk("P2M: %d levels with order-%d root, VTCR 0x%"PRIregister"\n", 4 - P2M_ROOT_LEVEL, P2M_ROOT_ORDER, val); =20 --=20 2.17.1 From nobody Wed May 1 20:12:38 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; arc=pass (i=1 dmarc=pass fromdomain=amd.com); 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helo=lists.xenproject.org; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C From: Ayan Kumar Halder To: CC: , , , , , , , , , , Ayan Kumar Halder Subject: [XEN v8 2/5] xen/arm: Introduce choice to enable 64/32 bit physical addressing Date: Fri, 2 Jun 2023 13:07:51 +0100 Message-ID: <20230602120754.23817-3-ayan.kumar.halder@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230602120754.23817-1-ayan.kumar.halder@amd.com> References: <20230602120754.23817-1-ayan.kumar.halder@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT113:EE_|MN0PR12MB6343:EE_ X-MS-Office365-Filtering-Correlation-Id: b3fdaa7b-8f92-4ca2-0f37-08db636229fb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(376002)(136003)(39860400002)(346002)(396003)(451199021)(46966006)(40470700004)(36840700001)(82310400005)(4326008)(81166007)(356005)(47076005)(103116003)(26005)(1076003)(40460700003)(7416002)(2906002)(86362001)(5660300002)(8936002)(8676002)(186003)(6666004)(36756003)(54906003)(426003)(2616005)(336012)(316002)(82740400003)(83380400001)(41300700001)(40480700001)(36860700001)(478600001)(70586007)(70206006)(6916009)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jun 2023 12:09:06.4852 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b3fdaa7b-8f92-4ca2-0f37-08db636229fb X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT113.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB6343 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1685707781083100001 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Some Arm based hardware platforms which does not support LPAE (eg Cortex-R52), uses 32 bit physical addresses. Also, users may choose to use 32 bits to represent physical addresses for optimization. To support the above use cases, we have introduced arch independent config to choose if the physical address can be represented using 32 bits (PHYS_ADDR_T_32) or 64 bits (!PHYS_ADDR_T_32). For now only ARM_32 provides support to enable 32 bit physical addressing. When PHYS_ADDR_T_32 is defined, PADDR_BITS is set to 32. Note that we use "unsigned long" (not "uint32_t") to denote the datatype of physical address. This is done to avoid using a cast each time PAGE_* macros are used on paddr_t. For eg PAGE_SIZE is defined as unsigned long. Thus, each time PAGE_SIZE is used with paddr_t, the result will be "unsigned long". On 32-bit architecture, "unsigned long" is 32-bit wide. Thus, it can be used to denote physical address. When PHYS_ADDR_T_32 is not defined for ARM_32, PADDR_BITS is set to 40. For ARM_64, PADDR_BITS is set to 48. The last two are same as the current configuration used today on Xen. Signed-off-by: Ayan Kumar Halder Reviewed-by: Michal Orzel Acked-by: Julien Grall --- Changes from - v1 - 1. Extracted from "[XEN v1 8/9] xen/arm: Other adaptations required to= support 32bit paddr". v2 - 1. Introduced Kconfig choice. ARM_64 can select PHYS_ADDR_64 only wher= eas ARM_32 can select PHYS_ADDR_32 or PHYS_ADDR_64. 2. For CONFIG_ARM_PA_32, paddr_t is defined as 'unsigned long'.=20 v3 - 1. Allow user to define PADDR_BITS by selecting different config optio= ns ARM_PA_BITS_32, ARM_PA_BITS_40 and ARM_PA_BITS_48. 2. Add the choice under "Architecture Features". v4 - 1. Removed PHYS_ADDR_T_64 as !PHYS_ADDR_T_32 means PHYS_ADDR_T_32. v5 - 1. Removed ARM_PA_BITS_48 as there is no choice for ARM_64. 2. In ARM_PA_BITS_32, "help" is moved to last, and "depends on" before "sel= ect". v6 - 1. Explained why we use "unsigned long" to represent physical address for ARM_32. v7 - 1. Updated the reasoning for using "unsigned long" for paddr_t. 2. Added R-b by Michal. xen/arch/Kconfig | 3 +++ xen/arch/arm/Kconfig | 33 ++++++++++++++++++++++++++++ xen/arch/arm/include/asm/page-bits.h | 6 +---- xen/arch/arm/include/asm/types.h | 14 ++++++++++++ xen/arch/arm/mm.c | 5 +++++ 5 files changed, 56 insertions(+), 5 deletions(-) diff --git a/xen/arch/Kconfig b/xen/arch/Kconfig index 7028f7b74f..67ba38f32f 100644 --- a/xen/arch/Kconfig +++ b/xen/arch/Kconfig @@ -1,6 +1,9 @@ config 64BIT bool =20 +config PHYS_ADDR_T_32 + bool + config NR_CPUS int "Maximum number of CPUs" range 1 4095 diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig index 239d3aed3c..1e87fe0247 100644 --- a/xen/arch/arm/Kconfig +++ b/xen/arch/arm/Kconfig @@ -26,6 +26,39 @@ config ARCH_DEFCONFIG =20 menu "Architecture Features" =20 +choice + prompt "Physical address space size" if ARM_32 + default ARM_PA_BITS_40 if ARM_32 + help + User can choose to represent the width of physical address. This can + sometimes help in optimizing the size of image when user chooses a + smaller size to represent physical address. + +config ARM_PA_BITS_32 + bool "32-bit" + depends on ARM_32 + select PHYS_ADDR_T_32 + help + On platforms where any physical address can be represented within 32 bi= ts, + user should choose this option. This will help in reduced size of the + binary. + Xen uses "unsigned long" and not "uint32_t" to denote the datatype of + physical address. This is done to avoid using a cast each time PAGE_* + macros are used on paddr_t. For eg PAGE_SIZE is defined as unsigned lon= g. + On 32-bit architecture, "unsigned long" is 32-bit wide. Thus, it can be + used to denote physical address. + +config ARM_PA_BITS_40 + bool "40-bit" + depends on ARM_32 +endchoice + +config PADDR_BITS + int + default 32 if ARM_PA_BITS_32 + default 40 if ARM_PA_BITS_40 + default 48 if ARM_64 + source "arch/Kconfig" =20 config ACPI diff --git a/xen/arch/arm/include/asm/page-bits.h b/xen/arch/arm/include/as= m/page-bits.h index 5d6477e599..deb381ceeb 100644 --- a/xen/arch/arm/include/asm/page-bits.h +++ b/xen/arch/arm/include/asm/page-bits.h @@ -3,10 +3,6 @@ =20 #define PAGE_SHIFT 12 =20 -#ifdef CONFIG_ARM_64 -#define PADDR_BITS 48 -#else -#define PADDR_BITS 40 -#endif +#define PADDR_BITS CONFIG_PADDR_BITS =20 #endif /* __ARM_PAGE_SHIFT_H__ */ diff --git a/xen/arch/arm/include/asm/types.h b/xen/arch/arm/include/asm/ty= pes.h index e218ed77bd..fb6618ef24 100644 --- a/xen/arch/arm/include/asm/types.h +++ b/xen/arch/arm/include/asm/types.h @@ -34,9 +34,23 @@ typedef signed long long s64; typedef unsigned long long u64; typedef u32 vaddr_t; #define PRIvaddr PRIx32 +#if defined(CONFIG_PHYS_ADDR_T_32) + +/* + * We use "unsigned long" and not "uint32_t" to denote the type. This is d= one + * to avoid having a cast each time PAGE_* macros are used on paddr_t. For= eg + * PAGE_SIZE is defined as unsigned long. + * On 32-bit architecture, "unsigned long" is 32-bit wide. Thus, we can us= e it + * to denote physical address. + */ +typedef unsigned long paddr_t; +#define INVALID_PADDR (~0UL) +#define PRIpaddr "08lx" +#else typedef u64 paddr_t; #define INVALID_PADDR (~0ULL) #define PRIpaddr "016llx" +#endif typedef u32 register_t; #define PRIregister "08x" #elif defined (CONFIG_ARM_64) diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c index 74f6ff2c6f..5ef5fd8c49 100644 --- a/xen/arch/arm/mm.c +++ b/xen/arch/arm/mm.c @@ -703,6 +703,11 @@ void __init setup_frametable_mappings(paddr_t ps, padd= r_t pe) const unsigned long mapping_size =3D frametable_size < MB(32) ? MB(2) = : MB(32); int rc; =20 + /* + * The size of paddr_t should be sufficient for the complete range of + * physical address. + */ + BUILD_BUG_ON((sizeof(paddr_t) * BITS_PER_BYTE) < PADDR_BITS); BUILD_BUG_ON(sizeof(struct page_info) !=3D PAGE_INFO_SIZE); =20 if ( frametable_size > FRAMETABLE_SIZE ) --=20 2.17.1 From nobody Wed May 1 20:12:38 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; arc=pass (i=1 dmarc=pass fromdomain=amd.com); dmarc=pass(p=quarantine dis=none) header.from=amd.com ARC-Seal: i=2; a=rsa-sha256; t=1685707790; cv=pass; d=zohomail.com; s=zohoarc; b=dDtcYZyya1s9fqEnsPpGGTGKyi9HSaMrjuTvZcrS9c1+syn3aUbQQ76awHeiBQylGHcsWrDPTdRaFUGdyWMUKZy5sAm4U51vd6bmeBsW1tgaH0qAdSmTEnV/1WabVbsNlEaMED4WKtXN6SHpaojIjShpHZDDY9up1ouEB3SOjGU= ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jun 2023 12:09:19.2695 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7664218c-6fcd-4154-c92d-08db63623199 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT013.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB7665 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1685707792744100001 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" As the previous patch introduces CONFIG_PHYS_ADDR_T_32 to support 32 bit physical addresses, the code specific to "Large Physical Address Extension" (ie LPAE) should be enclosed within "ifndef CONFIG_PHYS_ADDR_T_32". Refer xen/arch/arm/include/asm/short-desc.h, "short_desc_l1_supersec_t" unsigned int extbase1:4; /* Extended base address, PA[35:32] */ unsigned int extbase2:4; /* Extended base address, PA[39:36] */ Thus, extbase1 and extbase2 are not valid when 32 bit physical addresses are supported. Signed-off-by: Ayan Kumar Halder Acked-by: Stefano Stabellini --- Changes from - v1 - 1. Extracted from "[XEN v1 8/9] xen/arm: Other adaptations required to= support 32bit paddr". v2 - 1. Reordered this patch so that it appears after CONFIG_ARM_PA_32 is introduced (in 6/9). v3 - 1. Updated the commit message. 2. Added Ack. v4 - 1. No changes. v5 - 1. No changes. v6 - 1. No changes. v7 - 1. No changes. xen/arch/arm/guest_walk.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/xen/arch/arm/guest_walk.c b/xen/arch/arm/guest_walk.c index 43d3215304..c80a0ce55b 100644 --- a/xen/arch/arm/guest_walk.c +++ b/xen/arch/arm/guest_walk.c @@ -154,8 +154,10 @@ static bool guest_walk_sd(const struct vcpu *v, mask =3D (1ULL << L1DESC_SUPERSECTION_SHIFT) - 1; *ipa =3D gva & mask; *ipa |=3D (paddr_t)(pte.supersec.base) << L1DESC_SUPERSECTION_= SHIFT; +#ifndef CONFIG_PHYS_ADDR_T_32 *ipa |=3D (paddr_t)(pte.supersec.extbase1) << L1DESC_SUPERSECT= ION_EXT_BASE1_SHIFT; *ipa |=3D (paddr_t)(pte.supersec.extbase2) << L1DESC_SUPERSECT= ION_EXT_BASE2_SHIFT; +#endif /* CONFIG_PHYS_ADDR_T_32 */ } =20 /* Set permissions so that the caller can check the flags by herse= lf. */ --=20 2.17.1 From nobody Wed May 1 20:12:38 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jun 2023 12:09:32.7163 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3f2c90ab-c47d-42a7-0e7f-08db636239b3 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT048.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4530 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1685707805223100001 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" When 32 bit physical addresses are used (ie PHYS_ADDR_T_32=3Dy), "va >> ZEROETH_SHIFT" causes an overflow. Also, there is no zeroeth level page table on Arm32. Also took the opportunity to clean up dump_pt_walk(). One could use DECLARE_OFFSETS() macro instead of declaring an array of page table offsets. Signed-off-by: Ayan Kumar Halder Reviewed-by: Michal Orzel Acked-by: Julien Grall --- Changes from - v1 - Removed the duplicate declaration for DECLARE_OFFSETS. v2 - 1. Reworded the commit message.=20 2. Use CONFIG_ARM_PA_32 to restrict zeroeth_table_offset. v3 - 1. Added R-b and Ack. v4 - 1. Removed R-b and Ack as we use CONFIG_PHYS_ADDR_T_32 instead of CONFIG_ARM_PA_BITS_32. This is to be in parity with our earlier patches where we use CONFIG_PHYS_ADDR_T_32 to denote 32-bit physical addr support. v5 - 1. Added R-b and Ack. v6 - 1. No changes. v7 - 1. No changes. xen/arch/arm/include/asm/lpae.h | 4 ++++ xen/arch/arm/mm.c | 7 +------ 2 files changed, 5 insertions(+), 6 deletions(-) diff --git a/xen/arch/arm/include/asm/lpae.h b/xen/arch/arm/include/asm/lpa= e.h index 3fdd5d0de2..7d2f6fd1bd 100644 --- a/xen/arch/arm/include/asm/lpae.h +++ b/xen/arch/arm/include/asm/lpae.h @@ -259,7 +259,11 @@ lpae_t mfn_to_xen_entry(mfn_t mfn, unsigned int attr); #define first_table_offset(va) TABLE_OFFSET(first_linear_offset(va)) #define second_table_offset(va) TABLE_OFFSET(second_linear_offset(va)) #define third_table_offset(va) TABLE_OFFSET(third_linear_offset(va)) +#ifdef CONFIG_PHYS_ADDR_T_32 +#define zeroeth_table_offset(va) 0 +#else #define zeroeth_table_offset(va) TABLE_OFFSET(zeroeth_linear_offset(va)) +#endif =20 /* * Macros to define page-tables: diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c index 5ef5fd8c49..e460249736 100644 --- a/xen/arch/arm/mm.c +++ b/xen/arch/arm/mm.c @@ -233,12 +233,7 @@ void dump_pt_walk(paddr_t ttbr, paddr_t addr, { static const char *level_strs[4] =3D { "0TH", "1ST", "2ND", "3RD" }; const mfn_t root_mfn =3D maddr_to_mfn(ttbr); - const unsigned int offsets[4] =3D { - zeroeth_table_offset(addr), - first_table_offset(addr), - second_table_offset(addr), - third_table_offset(addr) - }; + DECLARE_OFFSETS(offsets, addr); lpae_t pte, *mapping; unsigned int level, root_table; =20 --=20 2.17.1 From nobody Wed May 1 20:12:38 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; arc=pass (i=1 dmarc=pass fromdomain=amd.com); dmarc=pass(p=quarantine dis=none) header.from=amd.com ARC-Seal: i=2; a=rsa-sha256; t=1685707829; cv=pass; d=zohomail.com; s=zohoarc; b=TKvdmB91PBIu8RRj1FP6obM7v9v7rmSZizW+p81324nsYiplxGS5a14LG53LUf6q2RAzb1h2+ZU7fEE+BE961eq4xqisYjUjsaPInj6l/E4mbggVVuAQBrGpH9ZilgEBD9nrLGSPEJKPHWxj/dkKhvbeUb+eGnuth+tD5athJTg= ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; 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bh=zLBAIbTyb40hmLGACIS/eIuTtif3YL9R0l6EzqD5g1c=; b=2fgv1nuikDTkOtJVd4zViXH8vc8Q4dtVC3M5LZlanXCC3hFAwWXFf7TNSNdPxFUowqkBrT8zShiT8me8wsDjtPLItW2Op2QEruFrBTxrWdjaptI9egxglktmFWVY3e48cNfa9AjTSS4mlS3+Vgty3K+xgXvR5J9EpOCGwGL8+Sw= X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C From: Ayan Kumar Halder To: CC: , , , , , , , , , , Ayan Kumar Halder Subject: [XEN v8 5/5] xen/arm: p2m: Enable support for 32bit IPA for ARM_32 Date: Fri, 2 Jun 2023 13:07:54 +0100 Message-ID: <20230602120754.23817-6-ayan.kumar.halder@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230602120754.23817-1-ayan.kumar.halder@amd.com> References: <20230602120754.23817-1-ayan.kumar.halder@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT036:EE_|PH0PR12MB5605:EE_ X-MS-Office365-Filtering-Correlation-Id: 5f447898-408e-4180-e65a-08db636247d4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jun 2023 12:09:56.4730 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5f447898-408e-4180-e65a-08db636247d4 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT036.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB5605 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1685707830965100001 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Refer ARM DDI 0406C.d ID040418, B3-1345, "A stage 2 translation with an input address range of 31-34 bits can start the translation either: - With a first-level lookup, accessing a first-level translation table with 2-16 entries. - With a second-level lookup, accessing a set of concatenated second-level translation tables" Thus, for 32 bit IPA, there will be no concatenated root level tables. So, the root-order is 0. Also, Refer ARM DDI 0406C.d ID040418, B3-1348 "Determining the required first lookup level for stage 2 translations For a stage 2 translation, the output address range from the stage 1 translations determines the required input address range for the stage 2 translation. The permitted values of VTCR.SL0 are: 0b00 Stage 2 translation lookup must start at the second level. 0b01 Stage 2 translation lookup must start at the first level. VTCR.T0SZ must indicate the required input address range. The size of the input address region is 2^(32-T0SZ) bytes." Thus VTCR.SL0 =3D 1 (maximum value) and VTCR.T0SZ =3D 0 when the size of input address region is 2^32 bytes. Signed-off-by: Ayan Kumar Halder Acked-by: Julien Grall Reviewed-by: Michal Orzel --- Changes from - v1 - New patch. v2 - 1. Added Ack. v3 - 1. Dropped Ack.=20 2. Rebased the patch based on the previous change. v4 - 1. t0sz is 0 for 32-bit IPA on Arm32. 2. Updated the commit message to explain t0sz, sl0 and root_order. v5 - 1. Rebased on top of the changes in the previous patch. v6 - 1. Removed the index for ARM_32. v7 - 1. No changes. xen/arch/arm/p2m.c | 1 + 1 file changed, 1 insertion(+) diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c index 76388ba54b..a969068a68 100644 --- a/xen/arch/arm/p2m.c +++ b/xen/arch/arm/p2m.c @@ -2265,6 +2265,7 @@ void __init setup_virt_paging(void) [6] =3D { 52, 12/*12*/, 4, 2 }, [7] =3D { 0 } /* Invalid */ #else + { 32, 0/*0*/, 0, 1 }, { 40, 24/*24*/, 1, 1 } #endif }; --=20 2.17.1