From: Tushar Dave <tushar.n.dave@oracle.com>
To: davem@davemloft.net, chris.hyser@oracle.com,
sowmini.varadhan@oracle.com, vgupta@synopsys.com,
robin.murphy@arm.com, jroedel@suse.de, egtvedt@samfundet.no,
krzk@kernel.org, rkuo@codeaurora.org, sparclinux@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 1/6] sparc64: Add FORCE_MAX_ZONEORDER and default to 13
Date: Mon, 10 Oct 2016 11:12:02 -0700 [thread overview]
Message-ID: <1476123127-24314-2-git-send-email-tushar.n.dave@oracle.com> (raw)
In-Reply-To: <1476123127-24314-1-git-send-email-tushar.n.dave@oracle.com>
From: Dave Kleikamp <dave.kleikamp@oracle.com>
This change allows ATU (new IOMMU) in SPARC systems to request
large (32M) contiguous memory during boot for creating IOTSB backing
store.
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com>
---
arch/sparc/Kconfig | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index f5d60f1..a7482bc 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -90,6 +90,10 @@ config ARCH_DEFCONFIG
config ARCH_PROC_KCORE_TEXT
def_bool y
+config ARCH_ATU
+ bool
+ default y if SPARC64
+
config IOMMU_HELPER
bool
default y if SPARC64
@@ -305,6 +309,20 @@ config ARCH_SPARSEMEM_ENABLE
config ARCH_SPARSEMEM_DEFAULT
def_bool y if SPARC64
+config FORCE_MAX_ZONEORDER
+ int "Maximum zone order"
+ default "13"
+ help
+ The kernel memory allocator divides physically contiguous memory
+ blocks into "zones", where each zone is a power of two number of
+ pages. This option selects the largest power of two that the kernel
+ keeps in the memory allocator. If you need to allocate very large
+ blocks of physically contiguous memory, then you may need to
+ increase this value.
+
+ This config option is actually maximum order plus one. For example,
+ a value of 13 means that the largest free memory block is 2^12 pages.
+
source "mm/Kconfig"
if SPARC64
--
1.9.1
next prev parent reply other threads:[~2016-10-10 18:13 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-10 18:12 [PATCH 0/6] sparc: Enable sun4v hypervisor PCI IOMMU v2 APIs and ATU Tushar Dave
2016-10-10 18:12 ` Tushar Dave [this message]
2016-10-24 17:45 ` [PATCH 1/6] sparc64: Add FORCE_MAX_ZONEORDER and default to 13 David Miller
2016-10-24 18:31 ` tndave
2016-10-24 18:32 ` David Miller
2016-10-10 18:12 ` [PATCH 2/6] sparc64: Add ATU (new IOMMU) support Tushar Dave
2016-10-24 17:46 ` David Miller
2016-10-24 20:40 ` tndave
2016-10-10 18:12 ` [PATCH 3/6] sparc64: Initialize iommu_map_table and iommu_pool Tushar Dave
2016-10-24 17:47 ` David Miller
2016-10-24 20:36 ` tndave
2016-10-10 18:12 ` [PATCH 4/6] sparc64: Bind PCIe devices to use IOMMU v2 service Tushar Dave
2016-10-10 18:12 ` [PATCH 5/6] sparc64: Enable sun4v dma ops to use IOMMU v2 APIs Tushar Dave
2016-10-10 18:12 ` [PATCH 6/6] sparc64: Enable 64-bit DMA Tushar Dave
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