linux-kernel - [PATCH v8 07/24] RISC-V: Use the minor version mask while computing sbi version

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Message-Id: <20240420151741.962500-8-atishp@rivosinc.com>
Date: Sat, 20 Apr 2024 08:17:23 -0700
From: Atish Patra <atishp@...osinc.com>
To: linux-kernel@...r.kernel.org
Cc: Atish Patra <atishp@...osinc.com>,
	Andrew Jones <ajones@...tanamicro.com>,
	Ajay Kaher <ajay.kaher@...adcom.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Alexandre Ghiti <alexghiti@...osinc.com>,
	Anup Patel <anup@...infault.org>,
	samuel.holland@...ive.com,
	Conor Dooley <conor.dooley@...rochip.com>,
	Juergen Gross <jgross@...e.com>,
	kvm-riscv@...ts.infradead.org,
	kvm@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	Mark Rutland <mark.rutland@....com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Shuah Khan <shuah@...nel.org>,
	virtualization@...ts.linux.dev,
	Will Deacon <will@...nel.org>,
	x86@...nel.org
Subject: [PATCH v8 07/24] RISC-V: Use the minor version mask while computing sbi version

As per the SBI specification, minor version is encoded in the
lower 24 bits only. Make sure that the SBI version is computed
with the appropriate mask.

Currently, there is no minor version in use. Thus, it doesn't
change anything functionality but it is good to be compliant with
the specification.

Reviewed-by: Andrew Jones <ajones@...tanamicro.com>
Signed-off-by: Atish Patra <atishp@...osinc.com>
---
 arch/riscv/include/asm/sbi.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index f31650b10899..112a0a0d9f46 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -367,8 +367,8 @@ static inline unsigned long sbi_minor_version(void)
 static inline unsigned long sbi_mk_version(unsigned long major,
 					    unsigned long minor)
 {
-	return ((major & SBI_SPEC_VERSION_MAJOR_MASK) <<
-		SBI_SPEC_VERSION_MAJOR_SHIFT) | minor;
+	return ((major & SBI_SPEC_VERSION_MAJOR_MASK) << SBI_SPEC_VERSION_MAJOR_SHIFT)
+		| (minor & SBI_SPEC_VERSION_MINOR_MASK);
 }
 
 int sbi_err_map_linux_errno(int err);
-- 
2.34.1