From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 56536A0487 for ; Mon, 29 Jul 2019 15:08:26 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 1D4F01BF86; Mon, 29 Jul 2019 15:08:25 +0200 (CEST) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id D8D921BF77; Mon, 29 Jul 2019 15:08:23 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jul 2019 04:10:25 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,322,1559545200"; d="scan'208";a="199599471" Received: from silpixa00399498.ir.intel.com (HELO silpixa00399498.ger.corp.intel.com) ([10.237.223.125]) by fmsmga002.fm.intel.com with ESMTP; 29 Jul 2019 04:10:24 -0700 From: Anatoly Burakov To: dev@dpdk.org Cc: Bruce Richardson , stable@dpdk.org Date: Mon, 29 Jul 2019 12:10:22 +0100 Message-Id: <09c3f9d74e1e49aa5b3608d4bf4a773d086e83ff.1564398617.git.anatoly.burakov@intel.com> X-Mailer: git-send-email 2.17.1 Subject: [dpdk-dev] [PATCH 1/2] eal: make base address hint OS-specific X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Content-Type: text/plain; charset="UTF-8" Message-ID: <20190729111022.RQN9fba_LVJ9qY7xj6gJabgeB_Pcud04malXYSklLr0@z> Not all OS's follow Linux's memory layout, which may lead to problems following the suggested common address hint absent of a base-virtaddr flag. Make this address hint OS-specific. Cc: stable@dpdk.org Signed-off-by: Anatoly Burakov --- lib/librte_eal/common/eal_common_memory.c | 19 +------------------ lib/librte_eal/common/eal_private.h | 6 ++++++ lib/librte_eal/freebsd/eal/eal_memory.c | 10 ++++++++++ lib/librte_eal/linux/eal/eal_memory.c | 20 ++++++++++++++++++++ 4 files changed, 37 insertions(+), 18 deletions(-) diff --git a/lib/librte_eal/common/eal_common_memory.c b/lib/librte_eal/common/eal_common_memory.c index 19ea47570..4a9cc1f19 100644 --- a/lib/librte_eal/common/eal_common_memory.c +++ b/lib/librte_eal/common/eal_common_memory.c @@ -40,23 +40,6 @@ static void *next_baseaddr; static uint64_t system_page_sz; -#ifdef RTE_ARCH_64 -/* - * Linux kernel uses a really high address as starting address for serving - * mmaps calls. If there exists addressing limitations and IOVA mode is VA, - * this starting address is likely too high for those devices. However, it - * is possible to use a lower address in the process virtual address space - * as with 64 bits there is a lot of available space. - * - * Current known limitations are 39 or 40 bits. Setting the starting address - * at 4GB implies there are 508GB or 1020GB for mapping the available - * hugepages. This is likely enough for most systems, although a device with - * addressing limitations should call rte_mem_check_dma_mask for ensuring all - * memory is within supported range. - */ -static uint64_t baseaddr = 0x100000000; -#endif - #define MAX_MMAP_WITH_DEFINED_ADDR_TRIES 5 void * eal_get_virtual_area(void *requested_addr, size_t *size, @@ -85,7 +68,7 @@ eal_get_virtual_area(void *requested_addr, size_t *size, #ifdef RTE_ARCH_64 if (next_baseaddr == NULL && internal_config.base_virtaddr == 0 && rte_eal_process_type() == RTE_PROC_PRIMARY) - next_baseaddr = (void *) baseaddr; + next_baseaddr = (void *) eal_get_baseaddr(); #endif if (requested_addr == NULL && next_baseaddr != NULL) { requested_addr = next_baseaddr; diff --git a/lib/librte_eal/common/eal_private.h b/lib/librte_eal/common/eal_private.h index 798ede553..31eae2278 100644 --- a/lib/librte_eal/common/eal_private.h +++ b/lib/librte_eal/common/eal_private.h @@ -381,4 +381,10 @@ rte_option_init(void); void rte_option_usage(void); +/** + * Get OS-specific EAL mapping base address. + */ +uint64_t +eal_get_baseaddr(void); + #endif /* _EAL_PRIVATE_H_ */ diff --git a/lib/librte_eal/freebsd/eal/eal_memory.c b/lib/librte_eal/freebsd/eal/eal_memory.c index 9b9a0577a..1bfdb52fb 100644 --- a/lib/librte_eal/freebsd/eal/eal_memory.c +++ b/lib/librte_eal/freebsd/eal/eal_memory.c @@ -22,6 +22,16 @@ #define EAL_PAGE_SIZE (sysconf(_SC_PAGESIZE)) +uint64_t eal_get_baseaddr(void) +{ + /* + * FreeBSD may allocate something in the space we will be mapping things + * before we get a chance to do that, so use a base address that's far + * away from where malloc() et al usually map things. + */ + return 0x1000000000; +} + /* * Get physical address of any mapped virtual address in the current process. */ diff --git a/lib/librte_eal/linux/eal/eal_memory.c b/lib/librte_eal/linux/eal/eal_memory.c index 1c089a1ef..8516f0d35 100644 --- a/lib/librte_eal/linux/eal/eal_memory.c +++ b/lib/librte_eal/linux/eal/eal_memory.c @@ -70,6 +70,26 @@ static int phys_addrs_available = -1; #define RANDOMIZE_VA_SPACE_FILE "/proc/sys/kernel/randomize_va_space" +uint64_t eal_get_baseaddr(void) +{ + /* + * Linux kernel uses a really high address as starting address for + * serving mmaps calls. If there exists addressing limitations and IOVA + * mode is VA, this starting address is likely too high for those + * devices. However, it is possible to use a lower address in the + * process virtual address space as with 64 bits there is a lot of + * available space. + * + * Current known limitations are 39 or 40 bits. Setting the starting + * address at 4GB implies there are 508GB or 1020GB for mapping the + * available hugepages. This is likely enough for most systems, although + * a device with addressing limitations should call + * rte_mem_check_dma_mask for ensuring all memory is within supported + * range. + */ + return 0x100000000; +} + /* * Get physical address of any mapped virtual address in the current process. */ -- 2.17.1