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From: Andrew Jones <andrew.jones@linux.dev>
To: kvm-riscv@lists.infradead.org
Cc: atishp@rivosinc.com, cleger@rivosinc.com, jamestiotio@gmail.com
Subject: [kvm-unit-tests PATCH v2 07/11] lib/cpumask: Add some operators
Date: Thu, 27 Feb 2025 15:19:31 +0100	[thread overview]
Message-ID: <20250227141946.91604-20-andrew.jones@linux.dev> (raw)
In-Reply-To: <20250227141946.91604-13-andrew.jones@linux.dev>

We have a need for cpumask_andnot(). Add that and a few friends.

Signed-off-by: Andrew Jones <andrew.jones@linux.dev>
---
 lib/cpumask.h | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/lib/cpumask.h b/lib/cpumask.h
index b4cd83a66a56..3f03d3370f85 100644
--- a/lib/cpumask.h
+++ b/lib/cpumask.h
@@ -72,6 +72,62 @@ static inline bool cpumask_subset(const struct cpumask *src1, const struct cpuma
 	return !lastmask || !((cpumask_bits(src1)[i] & ~cpumask_bits(src2)[i]) & lastmask);
 }
 
+/* false if dst is empty */
+static inline bool cpumask_and(cpumask_t *dst, const cpumask_t *src1, const cpumask_t *src2)
+{
+	unsigned long lastmask = BIT_MASK(nr_cpus) - 1;
+	unsigned long ret = 0;
+	int i;
+
+	for (i = 0; i < BIT_WORD(nr_cpus); ++i) {
+		cpumask_bits(dst)[i] = cpumask_bits(src1)[i] & cpumask_bits(src2)[i];
+		ret |= cpumask_bits(dst)[i];
+	}
+
+	cpumask_bits(dst)[i] = (cpumask_bits(src1)[i] & cpumask_bits(src2)[i]) & lastmask;
+
+	return ret | cpumask_bits(dst)[i];
+}
+
+static inline void cpumask_or(cpumask_t *dst, const cpumask_t *src1, const cpumask_t *src2)
+{
+	unsigned long lastmask = BIT_MASK(nr_cpus) - 1;
+	int i;
+
+	for (i = 0; i < BIT_WORD(nr_cpus); ++i)
+		cpumask_bits(dst)[i] = cpumask_bits(src1)[i] | cpumask_bits(src2)[i];
+
+	cpumask_bits(dst)[i] = (cpumask_bits(src1)[i] | cpumask_bits(src2)[i]) & lastmask;
+}
+
+static inline void cpumask_xor(cpumask_t *dst, const cpumask_t *src1, const cpumask_t *src2)
+{
+	unsigned long lastmask = BIT_MASK(nr_cpus) - 1;
+	int i;
+
+	for (i = 0; i < BIT_WORD(nr_cpus); ++i)
+		cpumask_bits(dst)[i] = cpumask_bits(src1)[i] ^ cpumask_bits(src2)[i];
+
+	cpumask_bits(dst)[i] = (cpumask_bits(src1)[i] ^ cpumask_bits(src2)[i]) & lastmask;
+}
+
+/* false if dst is empty */
+static inline bool cpumask_andnot(cpumask_t *dst, const cpumask_t *src1, const cpumask_t *src2)
+{
+	unsigned long lastmask = BIT_MASK(nr_cpus) - 1;
+	unsigned long ret = 0;
+	int i;
+
+	for (i = 0; i < BIT_WORD(nr_cpus); ++i) {
+		cpumask_bits(dst)[i] = cpumask_bits(src1)[i] & ~cpumask_bits(src2)[i];
+		ret |= cpumask_bits(dst)[i];
+	}
+
+	cpumask_bits(dst)[i] = (cpumask_bits(src1)[i] & ~cpumask_bits(src2)[i]) & lastmask;
+
+	return ret | cpumask_bits(dst)[i];
+}
+
 static inline bool cpumask_equal(const struct cpumask *src1, const struct cpumask *src2)
 {
 	unsigned long lastmask = BIT_MASK(nr_cpus) - 1;
-- 
2.48.1


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  parent reply	other threads:[~2025-02-27 14:43 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-02-27 14:19 [kvm-unit-tests PATCH v2 00/11] riscv: sbi: Test improvements and a couple new Andrew Jones
2025-02-27 14:19 ` [kvm-unit-tests PATCH v2 01/11] riscv: sbi: Drop fwft upper bits test Andrew Jones
2025-02-27 14:21   ` Clément Léger
2025-02-27 14:19 ` [kvm-unit-tests PATCH v2 02/11] riscv: sbi: Add fwft pte_hw_ad_updating test Andrew Jones
2025-02-27 14:30   ` Clément Léger
2025-02-27 14:19 ` [kvm-unit-tests PATCH v2 03/11] riscv: sbi: Ensure we have IPIs enabled for HSM suspend tests Andrew Jones
2025-02-27 14:19 ` [kvm-unit-tests PATCH v2 04/11] riscv: sbi: Ensure SUSP test gets an interrupt Andrew Jones
2025-02-27 14:19 ` [kvm-unit-tests PATCH v2 05/11] riscv: sbi: Improve susp expected error output Andrew Jones
2025-02-27 14:38   ` Clément Léger
2025-02-27 14:19 ` [kvm-unit-tests PATCH v2 06/11] riscv: sbi: Improve interrupt handling cleanup Andrew Jones
2025-02-27 14:19 ` Andrew Jones [this message]
2025-02-27 14:22 ` [kvm-unit-tests PATCH v2 08/11] riscv: sbi: HSM suspend may not be supported Andrew Jones
2025-02-27 14:22 ` [kvm-unit-tests PATCH v2 09/11] riscv: sbi: Probe/skip SUSP Andrew Jones
2025-02-27 14:22 ` [kvm-unit-tests PATCH v2 10/11] riscv: sbi: susp: Check upper bits of sleep_type are ignored Andrew Jones
2025-02-27 14:22 ` [kvm-unit-tests PATCH v2 11/11] riscv: sbi: Add bad fid tests Andrew Jones
2025-02-27 14:33   ` Clément Léger
2025-03-04  9:31 ` [kvm-unit-tests PATCH v2 00/11] riscv: sbi: Test improvements and a couple new Andrew Jones

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