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From: Claudio Imbrenda <imbrenda@linux.ibm.com>
To: kvm@vger.kernel.org, pbonzini@redhat.com
Cc: frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com,
	cohuck@redhat.com, lvivier@redhat.com
Subject: [kvm-unit-tests PATCH v2 3/7] lib/asm: Add definitions of memory areas
Date: Fri,  2 Oct 2020 17:44:16 +0200	[thread overview]
Message-ID: <20201002154420.292134-4-imbrenda@linux.ibm.com> (raw)
In-Reply-To: <20201002154420.292134-1-imbrenda@linux.ibm.com>

Add definitions and boundaries of memory areas for some architectures.
This is needed by the next patch.

Most architectures only get one generic memory area, wherease x86 and
s390x get some more attention:

x86 gets
* lowest area (24-bit addresses)
* low area (32-bit addresses)
* the rest

s390x gets
* low area (31-bit addresses)
* the rest

Notice that the number indicates the order in which the areas are
scanned when more than one area is indicated. The default order tries
to get allocations from higher address ranges before trying lower ones.
This tries to keep the precious lower addresses as free as possible.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
---
 lib/asm-generic/memory_areas.h | 11 +++++++++++
 lib/arm/asm/memory_areas.h     | 11 +++++++++++
 lib/arm64/asm/memory_areas.h   | 11 +++++++++++
 lib/powerpc/asm/memory_areas.h | 11 +++++++++++
 lib/ppc64/asm/memory_areas.h   | 11 +++++++++++
 lib/s390x/asm/memory_areas.h   | 17 +++++++++++++++++
 lib/x86/asm/memory_areas.h     | 22 ++++++++++++++++++++++
 7 files changed, 94 insertions(+)
 create mode 100644 lib/asm-generic/memory_areas.h
 create mode 100644 lib/arm/asm/memory_areas.h
 create mode 100644 lib/arm64/asm/memory_areas.h
 create mode 100644 lib/powerpc/asm/memory_areas.h
 create mode 100644 lib/ppc64/asm/memory_areas.h
 create mode 100644 lib/s390x/asm/memory_areas.h
 create mode 100644 lib/x86/asm/memory_areas.h

diff --git a/lib/asm-generic/memory_areas.h b/lib/asm-generic/memory_areas.h
new file mode 100644
index 0000000..927baa7
--- /dev/null
+++ b/lib/asm-generic/memory_areas.h
@@ -0,0 +1,11 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN 0
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#endif
diff --git a/lib/arm/asm/memory_areas.h b/lib/arm/asm/memory_areas.h
new file mode 100644
index 0000000..927baa7
--- /dev/null
+++ b/lib/arm/asm/memory_areas.h
@@ -0,0 +1,11 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN 0
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#endif
diff --git a/lib/arm64/asm/memory_areas.h b/lib/arm64/asm/memory_areas.h
new file mode 100644
index 0000000..927baa7
--- /dev/null
+++ b/lib/arm64/asm/memory_areas.h
@@ -0,0 +1,11 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN 0
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#endif
diff --git a/lib/powerpc/asm/memory_areas.h b/lib/powerpc/asm/memory_areas.h
new file mode 100644
index 0000000..927baa7
--- /dev/null
+++ b/lib/powerpc/asm/memory_areas.h
@@ -0,0 +1,11 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN 0
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#endif
diff --git a/lib/ppc64/asm/memory_areas.h b/lib/ppc64/asm/memory_areas.h
new file mode 100644
index 0000000..927baa7
--- /dev/null
+++ b/lib/ppc64/asm/memory_areas.h
@@ -0,0 +1,11 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN 0
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#endif
diff --git a/lib/s390x/asm/memory_areas.h b/lib/s390x/asm/memory_areas.h
new file mode 100644
index 0000000..4856a27
--- /dev/null
+++ b/lib/s390x/asm/memory_areas.h
@@ -0,0 +1,17 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN BIT(31-12)
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_LOW_PFN 0
+#define AREA_LOW_NUMBER 1
+#define AREA_LOW 2
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#define AREA_DMA31 AREA_LOW
+
+#endif
diff --git a/lib/x86/asm/memory_areas.h b/lib/x86/asm/memory_areas.h
new file mode 100644
index 0000000..d704df3
--- /dev/null
+++ b/lib/x86/asm/memory_areas.h
@@ -0,0 +1,22 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN BIT(32-12)
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_LOW_PFN BIT(24-12)
+#define AREA_LOW_NUMBER 1
+#define AREA_LOW 2
+
+#define AREA_LOWEST_PFN 0
+#define AREA_LOWEST_NUMBER 2
+#define AREA_LOWEST 4
+
+#define AREA_DMA24 AREA_LOWEST
+#define AREA_DMA32 (AREA_LOWEST | AREA_LOW)
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#endif
-- 
2.26.2


  parent reply	other threads:[~2020-10-02 15:44 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-02 15:44 [kvm-unit-tests PATCH v2 0/7] Rewrite the allocators Claudio Imbrenda
2020-10-02 15:44 ` [kvm-unit-tests PATCH v2 1/7] lib/list: Add double linked list management functions Claudio Imbrenda
2020-10-02 18:18   ` Andrew Jones
2020-10-05  6:57     ` Claudio Imbrenda
2020-11-06 11:29   ` Paolo Bonzini
2020-10-02 15:44 ` [kvm-unit-tests PATCH v2 2/7] lib/vmalloc: vmalloc support for handling allocation metadata Claudio Imbrenda
2020-10-03  8:46   ` Andrew Jones
2020-10-05  7:00     ` Claudio Imbrenda
2020-10-02 15:44 ` Claudio Imbrenda [this message]
2020-10-03  9:23   ` [kvm-unit-tests PATCH v2 3/7] lib/asm: Add definitions of memory areas Andrew Jones
2020-10-05  7:10     ` Claudio Imbrenda
2020-11-06 11:34   ` Paolo Bonzini
2020-11-06 12:58     ` Claudio Imbrenda
2020-11-06 13:04       ` Paolo Bonzini
2020-10-02 15:44 ` [kvm-unit-tests PATCH v2 4/7] lib/alloc_page: complete rewrite of the page allocator Claudio Imbrenda
2020-10-05 12:40   ` Andrew Jones
2020-10-05 15:56     ` Claudio Imbrenda
2020-10-05 16:53       ` Andrew Jones
2020-10-05 17:18         ` Claudio Imbrenda
2020-10-05 18:04           ` Andrew Jones
2020-12-08  0:41   ` Nadav Amit
2020-12-08  1:10     ` Nadav Amit
2020-12-08  9:15       ` Claudio Imbrenda
2020-12-08  9:23         ` Nadav Amit
2020-12-08 10:00           ` Claudio Imbrenda
2020-12-08 12:48             ` Nadav Amit
2020-12-08 13:41               ` Claudio Imbrenda
2020-12-08 14:26                 ` Andrew Jones
2020-12-09  8:53                   ` Claudio Imbrenda
2020-12-08  9:11     ` Claudio Imbrenda
2020-12-08  9:16       ` Nadav Amit
2020-10-02 15:44 ` [kvm-unit-tests PATCH v2 5/7] lib/alloc: simplify free and malloc Claudio Imbrenda
2020-10-02 15:44 ` [kvm-unit-tests PATCH v2 6/7] lib/alloc.h: remove align_min from struct alloc_ops Claudio Imbrenda
2020-11-06 11:35   ` Paolo Bonzini
2020-11-06 12:56     ` Claudio Imbrenda
2020-10-02 15:44 ` [kvm-unit-tests PATCH v2 7/7] lib/alloc_page: allow reserving arbitrary memory ranges Claudio Imbrenda
2020-10-05 11:54 ` [kvm-unit-tests PATCH v2 0/7] Rewrite the allocators Pierre Morel
2020-10-05 12:35   ` Claudio Imbrenda
2020-10-05 12:49     ` Andrew Jones
2020-10-05 12:57     ` Pierre Morel
2020-10-05 14:59       ` Claudio Imbrenda
2020-11-06 11:36 ` Paolo Bonzini

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