From: "Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>
To: qemu-devel@nongnu.org, pbonzini@redhat.com, aarcange@redhat.com,
ehabkost@redhat.com
Subject: [Qemu-devel] [PATCH 1/5] BIT_RANGE convenience macro
Date: Thu, 16 Jun 2016 18:12:09 +0100 [thread overview]
Message-ID: <1466097133-5489-2-git-send-email-dgilbert@redhat.com> (raw)
In-Reply-To: <1466097133-5489-1-git-send-email-dgilbert@redhat.com>
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
e.g. BIT_RANGE(15, 0) gives 0xff00
Suggested by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
include/qemu/bitops.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h
index 755fdd1..e411688 100644
--- a/include/qemu/bitops.h
+++ b/include/qemu/bitops.h
@@ -23,6 +23,9 @@
#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG))
#define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
+/* e.g. BIT_RANGE(15, 0) -> 0xff00 */
+#define BIT_RANGE(hb, lb) ((2ull << (hb)) - (1ull << (lb)))
+
/**
* set_bit - Set a bit in memory
--
2.7.4
next prev parent reply other threads:[~2016-06-16 17:12 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-16 17:12 [Qemu-devel] [PATCH 0/5] x86: Physical address limit patches Dr. David Alan Gilbert (git)
2016-06-16 17:12 ` Dr. David Alan Gilbert (git) [this message]
2016-06-16 17:23 ` [Qemu-devel] [PATCH 1/5] BIT_RANGE convenience macro Paolo Bonzini
2016-06-16 17:24 ` Dr. David Alan Gilbert
2016-06-16 18:01 ` Peter Maydell
2016-06-16 18:05 ` Paolo Bonzini
2016-06-20 14:11 ` Dr. David Alan Gilbert
2016-06-20 14:17 ` Peter Maydell
2016-06-16 17:12 ` [Qemu-devel] [PATCH 2/5] x86: Mask mtrr mask based on CPU physical address limits Dr. David Alan Gilbert (git)
2016-06-16 19:59 ` Eduardo Habkost
2016-06-17 8:23 ` Dr. David Alan Gilbert
2016-06-17 12:13 ` Paolo Bonzini
2016-06-16 17:12 ` [Qemu-devel] [PATCH 3/5] x86: fill high bits of mtrr mask Dr. David Alan Gilbert (git)
2016-06-16 20:14 ` Eduardo Habkost
2016-06-17 7:47 ` Paolo Bonzini
2016-06-17 12:46 ` Eduardo Habkost
2016-06-17 13:01 ` Paolo Bonzini
2016-06-17 13:41 ` Eduardo Habkost
2016-06-17 14:25 ` Paolo Bonzini
2016-06-17 15:27 ` Eduardo Habkost
2016-06-17 15:29 ` Paolo Bonzini
2016-06-17 15:35 ` Eduardo Habkost
2016-06-17 13:51 ` Dr. David Alan Gilbert
2016-06-17 14:19 ` Paolo Bonzini
2016-06-17 8:53 ` Dr. David Alan Gilbert
2016-06-16 17:12 ` [Qemu-devel] [PATCH 4/5] x86: Allow physical address bits to be set Dr. David Alan Gilbert (git)
2016-06-16 17:26 ` Paolo Bonzini
2016-06-16 18:09 ` Eduardo Habkost
2016-06-16 20:24 ` Eduardo Habkost
2016-06-17 8:15 ` Dr. David Alan Gilbert
2016-06-17 8:43 ` Paolo Bonzini
2016-06-17 9:17 ` Gerd Hoffmann
2016-06-17 9:52 ` Igor Mammedov
2016-06-17 11:20 ` Gerd Hoffmann
2016-06-17 16:20 ` Laszlo Ersek
2016-06-17 16:07 ` Laszlo Ersek
2016-06-19 16:13 ` Marcel Apfelbaum
2016-06-20 10:42 ` Igor Mammedov
2016-06-20 11:13 ` Marcel Apfelbaum
2016-06-17 9:37 ` Dr. David Alan Gilbert
2016-06-17 9:54 ` Paolo Bonzini
2016-06-17 13:18 ` Eduardo Habkost
2016-06-17 13:38 ` Paolo Bonzini
2016-06-17 15:19 ` Eduardo Habkost
2016-06-17 15:28 ` Paolo Bonzini
2016-06-17 15:49 ` Eduardo Habkost
2016-06-21 19:44 ` [Qemu-devel] Default for phys-addr-bits? (was Re: [PATCH 4/5] x86: Allow physical address bits to be set) Eduardo Habkost
2016-06-22 12:41 ` Paolo Bonzini
2016-06-22 14:24 ` Andrea Arcangeli
2016-06-22 14:33 ` Paolo Bonzini
2016-06-22 14:44 ` Andrea Arcangeli
2016-06-22 14:48 ` Paolo Bonzini
2016-06-22 15:02 ` Andrea Arcangeli
2016-06-22 22:44 ` Michael S. Tsirkin
2016-06-22 23:23 ` Andrea Arcangeli
2016-06-22 23:45 ` Michael S. Tsirkin
2016-06-23 8:40 ` Gerd Hoffmann
2016-06-23 16:38 ` Michael S. Tsirkin
2016-06-24 5:55 ` Gerd Hoffmann
2016-06-24 23:12 ` Michael S. Tsirkin
2016-06-29 16:42 ` Dr. David Alan Gilbert
2016-06-30 6:10 ` Gerd Hoffmann
2016-06-30 10:59 ` Dr. David Alan Gilbert
2016-06-30 16:14 ` Gerd Hoffmann
2016-06-30 17:12 ` Dr. David Alan Gilbert
2016-07-01 19:03 ` Dr. David Alan Gilbert
2016-06-22 22:40 ` Michael S. Tsirkin
2016-06-22 23:15 ` Andrea Arcangeli
2016-06-19 3:36 ` [Qemu-devel] [PATCH 4/5] x86: Allow physical address bits to be set Michael S. Tsirkin
2016-06-20 7:04 ` Paolo Bonzini
2016-06-17 14:24 ` Marcel Apfelbaum
2016-06-16 17:12 ` [Qemu-devel] [PATCH 5/5] x86: Set physical address bits based on host Dr. David Alan Gilbert (git)
2016-06-17 7:25 ` Igor Mammedov
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