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[RESEND PATCH 28/32] bitops: Support 32 and 64 bit mask macro
From: |
Yang Zhong |
Subject: |
[RESEND PATCH 28/32] bitops: Support 32 and 64 bit mask macro |
Date: |
Fri, 30 Apr 2021 14:24:51 +0800 |
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 3acbf3384c..8678c8dcd5 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
--
2.29.2.334.gfaefdd61ec
- [RESEND PATCH 16/32] Adjust min CPUID level to 0x12 when SGX is enabled, (continued)
- [RESEND PATCH 16/32] Adjust min CPUID level to 0x12 when SGX is enabled, Yang Zhong, 2021/04/30
- [RESEND PATCH 18/32] hw/i386/pc: Account for SGX EPC sections when calculating device memory, Yang Zhong, 2021/04/30
- [RESEND PATCH 19/32] i386/pc: Add e820 entry for SGX EPC section(s), Yang Zhong, 2021/04/30
- [RESEND PATCH 20/32] i386: acpi: Add SGX EPC entry to ACPI tables, Yang Zhong, 2021/04/30
- [RESEND PATCH 21/32] q35: Add support for SGX EPC, Yang Zhong, 2021/04/30
- [RESEND PATCH 22/32] i440fx: Add support for SGX EPC, Yang Zhong, 2021/04/30
- [RESEND PATCH 23/32] hostmem: Add the reset interface for EPC backend reset, Yang Zhong, 2021/04/30
- [RESEND PATCH 24/32] sgx-epc: Add the reset interface for sgx-epc virt device, Yang Zhong, 2021/04/30
- [RESEND PATCH 25/32] qmp: Add query-sgx command, Yang Zhong, 2021/04/30
- [RESEND PATCH 26/32] hmp: Add 'info sgx' command, Yang Zhong, 2021/04/30
- [RESEND PATCH 28/32] bitops: Support 32 and 64 bit mask macro,
Yang Zhong <=
- [RESEND PATCH 29/32] qmp: Add the qmp_query_sgx_capabilities(), Yang Zhong, 2021/04/30
- [RESEND PATCH 27/32] i386: Add sgx_get_info() interface, Yang Zhong, 2021/04/30
- [RESEND PATCH 31/32] sgx-epc: Add the fill_device_info() callback support, Yang Zhong, 2021/04/30
- [RESEND PATCH 32/32] doc: Add the SGX doc, Yang Zhong, 2021/04/30
- [RESEND PATCH 30/32] Kconfig: Add CONFIG_SGX support, Yang Zhong, 2021/04/30