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bh=dDRwZ7ZvjA48oEAhFhPaFv6O7TQwmnUnkVyn+g6g4qQ=; b=TreOAcegEs6wNN3yAoHGzcaRz3TdTuFeSw56nden8eQDx6WRnS2LoqZGw5WUEe7SE6fE3pu/WsQ+McqTbVvjfGofNhKsH6wYOFBI0hQq1AlJX3hOX5+oykQQVQko9rA/pixN9zRadB09KIuw7o39Bb8zG6OA0iU1MC9bAaceRQk= 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=SATLEXMB03.amd.com; pr=C From: Ayan Kumar Halder To: CC: , , , , , , Ayan Kumar Halder Subject: [XEN v6 2/2] xen/arm: domain_build: Use pfn start and end address for rangeset_{xxx}_range() Date: Mon, 13 Feb 2023 12:44:38 +0000 Message-ID: <20230213124438.14836-3-ayan.kumar.halder@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230213124438.14836-1-ayan.kumar.halder@amd.com> References: <20230213124438.14836-1-ayan.kumar.halder@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT102:EE_|DS0PR12MB7536:EE_ X-MS-Office365-Filtering-Correlation-Id: 1e487a48-7a6a-4b88-33ac-08db0dc02517 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: 13 Feb 2023 12:45:10.9279 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1e487a48-7a6a-4b88-33ac-08db0dc02517 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: DM6NAM11FT102.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7536 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1676292347694100001 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" rangeset_{xxx}_range() functions are invoked with 'start' and 'size' as arguments which are either 'uint64_t' or 'paddr_t'. However, the function accepts 'unsigned long' for 'start' and 'size'. 'unsigned long' is 32 bits = for ARM_32. Thus, there is an implicit downcasting from 'uint64_t'/'paddr_t' to 'unsigned long' when invoking rangeset_{xxx}_range(). However, it may seem there is a possibility of lose of data due to truncati= on. In reality, 'start' and 'size' are always page aligned. And ARM_32 currently supports 40 bits as the width of physical address. So if the addresses are page aligned, the last 12 bits contain zeroes. Thus, we could instead pass page frame number which will contain 28 bits (4= 0-12 on Arm_32) and this can be represented using 'unsigned long'. On Arm_64, this change will not induce any adverse side effect as the width= of physical address is 48 bits. Thus, the width of 'pfn' (ie 48 - 12 =3D 36) c= an be represented using 'unsigned long' (which is 64 bits wide). Signed-off-by: Ayan Kumar Halder --- Changes from - v1 - v5 - NA (New patch introduced in v6). xen/arch/arm/domain_build.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index a798e0b256..6a8c7206ae 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -1566,7 +1566,8 @@ static int __init find_unallocated_memory(const struc= t kernel_info *kinfo, { start =3D bootinfo.mem.bank[i].start; end =3D bootinfo.mem.bank[i].start + bootinfo.mem.bank[i].size; - res =3D rangeset_add_range(unalloc_mem, start, end - 1); + res =3D rangeset_add_range(unalloc_mem, PFN_DOWN(start), + PFN_DOWN(end - 1)); if ( res ) { printk(XENLOG_ERR "Failed to add: %#"PRIpaddr"->%#"PRIpaddr"\n= ", @@ -1580,7 +1581,8 @@ static int __init find_unallocated_memory(const struc= t kernel_info *kinfo, { start =3D assign_mem->bank[i].start; end =3D assign_mem->bank[i].start + assign_mem->bank[i].size; - res =3D rangeset_remove_range(unalloc_mem, start, end - 1); + res =3D rangeset_remove_range(unalloc_mem, PFN_DOWN(start), + PFN_DOWN(end - 1)); if ( res ) { printk(XENLOG_ERR "Failed to remove: %#"PRIpaddr"->%#"PRIpaddr= "\n", @@ -1595,7 +1597,8 @@ static int __init find_unallocated_memory(const struc= t kernel_info *kinfo, start =3D bootinfo.reserved_mem.bank[i].start; end =3D bootinfo.reserved_mem.bank[i].start + bootinfo.reserved_mem.bank[i].size; - res =3D rangeset_remove_range(unalloc_mem, start, end - 1); + res =3D rangeset_remove_range(unalloc_mem, PFN_DOWN(start), + PFN_DOWN(end - 1)); if ( res ) { printk(XENLOG_ERR "Failed to remove: %#"PRIpaddr"->%#"PRIpaddr= "\n", @@ -1607,7 +1610,7 @@ static int __init find_unallocated_memory(const struc= t kernel_info *kinfo, /* Remove grant table region */ start =3D kinfo->gnttab_start; end =3D kinfo->gnttab_start + kinfo->gnttab_size; - res =3D rangeset_remove_range(unalloc_mem, start, end - 1); + res =3D rangeset_remove_range(unalloc_mem, PFN_DOWN(start), PFN_DOWN(e= nd - 1)); if ( res ) { printk(XENLOG_ERR "Failed to remove: %#"PRIpaddr"->%#"PRIpaddr"\n", @@ -1617,7 +1620,7 @@ static int __init find_unallocated_memory(const struc= t kernel_info *kinfo, =20 start =3D 0; end =3D (1ULL << p2m_ipa_bits) - 1; - res =3D rangeset_report_ranges(unalloc_mem, start, end, + res =3D rangeset_report_ranges(unalloc_mem, PFN_DOWN(start), PFN_DOWN(= end), add_ext_regions, ext_regions); if ( res ) ext_regions->nr_banks =3D 0; @@ -1639,7 +1642,7 @@ static int __init handle_pci_range(const struct dt_de= vice_node *dev, =20 start =3D addr & PAGE_MASK; end =3D PAGE_ALIGN(addr + len); - res =3D rangeset_remove_range(mem_holes, start, end - 1); + res =3D rangeset_remove_range(mem_holes, PFN_DOWN(start),PFN_DOWN(end = - 1)); if ( res ) { printk(XENLOG_ERR "Failed to remove: %#"PRIpaddr"->%#"PRIpaddr"\n", @@ -1677,7 +1680,7 @@ static int __init find_memory_holes(const struct kern= el_info *kinfo, /* Start with maximum possible addressable physical memory range */ start =3D 0; end =3D (1ULL << p2m_ipa_bits) - 1; - res =3D rangeset_add_range(mem_holes, start, end); + res =3D rangeset_add_range(mem_holes, PFN_DOWN(start), PFN_DOWN(end)); if ( res ) { printk(XENLOG_ERR "Failed to add: %#"PRIpaddr"->%#"PRIpaddr"\n", @@ -1708,7 +1711,8 @@ static int __init find_memory_holes(const struct kern= el_info *kinfo, =20 start =3D addr & PAGE_MASK; end =3D PAGE_ALIGN(addr + size); - res =3D rangeset_remove_range(mem_holes, start, end - 1); + res =3D rangeset_remove_range(mem_holes, PFN_DOWN(start), + PFN_DOWN(end - 1)); if ( res ) { printk(XENLOG_ERR "Failed to remove: %#"PRIpaddr"->%#"PRIp= addr"\n", @@ -1735,7 +1739,7 @@ static int __init find_memory_holes(const struct kern= el_info *kinfo, =20 start =3D 0; end =3D (1ULL << p2m_ipa_bits) - 1; - res =3D rangeset_report_ranges(mem_holes, start, end, + res =3D rangeset_report_ranges(mem_holes, PFN_DOWN(start), PFN_DOWN(en= d), add_ext_regions, ext_regions); if ( res ) ext_regions->nr_banks =3D 0; --=20 2.17.1