From: Yang Zhong <yang.zhong@intel.com>
To: qemu-devel@nongnu.org
Cc: yang.zhong@intel.com, pbonzini@redhat.com, eblake@redhat.com,
seanjc@google.com
Subject: [PATCH 4/7] bitops: Support 32 and 64 bit mask macro
Date: Wed, 8 Sep 2021 16:19:34 +0800 [thread overview]
Message-ID: <20210908081937.77254-5-yang.zhong@intel.com> (raw)
In-Reply-To: <20210908081937.77254-1-yang.zhong@intel.com>
The Qemu should enable bit mask macro like Linux did in the
kernel, the GENMASK(h, l) and GENMASK_ULL(h, l) will set the
bit to 1 from l to h bit in the 32 bit or 64 bit long type.
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
---
include/qemu/bitops.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h
index 03213ce952..04dec60670 100644
--- a/include/qemu/bitops.h
+++ b/include/qemu/bitops.h
@@ -18,6 +18,7 @@
#define BITS_PER_BYTE CHAR_BIT
#define BITS_PER_LONG (sizeof (unsigned long) * BITS_PER_BYTE)
+#define BITS_PER_LONG_LONG 64
#define BIT(nr) (1UL << (nr))
#define BIT_ULL(nr) (1ULL << (nr))
@@ -28,6 +29,12 @@
#define MAKE_64BIT_MASK(shift, length) \
(((~0ULL) >> (64 - (length))) << (shift))
+#define GENMASK(h, l) \
+ (((~0UL) << (l)) & (~0UL >> (BITS_PER_LONG - 1 - (h))))
+
+#define GENMASK_ULL(h, l) \
+ (((~0ULL) << (l)) & (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h))))
+
/**
* set_bit - Set a bit in memory
* @nr: the bit to set
next prev parent reply other threads:[~2021-09-08 8:26 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-08 8:19 [PATCH 0/7] The HMP/QMP interfaces in Qemu SGX Yang Zhong
2021-09-08 8:19 ` [PATCH 1/7] qmp: Add query-sgx command Yang Zhong
2021-09-08 8:19 ` [PATCH 2/7] hmp: Add 'info sgx' command Yang Zhong
2021-09-08 8:19 ` [PATCH 3/7] i386: Add sgx_get_info() interface Yang Zhong
2021-09-08 8:32 ` Philippe Mathieu-Daudé
2021-09-09 2:20 ` Yang Zhong
2021-09-08 8:55 ` Paolo Bonzini
2021-09-09 7:05 ` Yang Zhong
2021-09-08 8:19 ` Yang Zhong [this message]
2021-09-08 8:34 ` [PATCH 4/7] bitops: Support 32 and 64 bit mask macro Philippe Mathieu-Daudé
2021-09-09 2:04 ` Yang Zhong
2021-09-08 8:19 ` [PATCH 5/7] qmp: Add the qmp_query_sgx_capabilities() Yang Zhong
2021-09-08 8:38 ` Philippe Mathieu-Daudé
2021-09-09 2:51 ` Yang Zhong
2021-09-09 9:36 ` Philippe Mathieu-Daudé
2021-09-09 12:06 ` Yang Zhong
2021-09-09 13:25 ` Philippe Mathieu-Daudé
2021-09-08 8:19 ` [PATCH 6/7] monitor: Fix coredump issue in non-x86 platform Yang Zhong
2021-09-08 8:53 ` Philippe Mathieu-Daudé
2021-09-08 8:54 ` Paolo Bonzini
2021-09-09 6:48 ` Yang Zhong
2021-09-08 8:19 ` [PATCH 7/7] pc: Cleanup the SGX definitions Yang Zhong
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