From: Bo Gan <ganboing@gmail.com>
To: opensbi@lists.infradead.org, dramforever@live.com,
anup.patel@oss.qualcomm.com
Cc: anup@brainfault.org, cleger@rivosinc.com, samuel.holland@sifive.com
Subject: [PATCH 4/7] include: sbi: set FS dirty in vsstatus when V=1
Date: Tue, 10 Feb 2026 01:40:41 -0800 [thread overview]
Message-ID: <20260210094044.72591-5-ganboing@gmail.com> (raw)
In-Reply-To: <20260210094044.72591-1-ganboing@gmail.com>
According to Privileged ISA 19.2.11:
Modifying the floating-point state when V=1 causes both fields
(vsstatus.FS and the HS-level sstatus.FS) to be set to 3 (Dirty)
Fixes: 130e65dd9d44 ("lib: sbi: Implement SET_FS_DIRTY() to make sure the mstatus FS dirty is set")
Signed-off-by: Bo Gan <ganboing@gmail.com>
---
include/sbi/riscv_fp.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/include/sbi/riscv_fp.h b/include/sbi/riscv_fp.h
index 03011af9..ff1dbc87 100644
--- a/include/sbi/riscv_fp.h
+++ b/include/sbi/riscv_fp.h
@@ -83,7 +83,11 @@
#define GET_FFLAGS() csr_read(CSR_FFLAGS)
#define SET_FFLAGS(value) csr_write(CSR_FFLAGS, (value))
-#define SET_FS_DIRTY(regs) (regs->mstatus |= MSTATUS_FS)
+#define SET_FS_DIRTY(regs) do { \
+ if (sbi_regs_from_virt(regs)) \
+ csr_set(CSR_VSSTATUS, MSTATUS_FS); \
+ regs->mstatus |= MSTATUS_FS; \
+} while(0)
#define GET_F32_RS1(insn, regs) (GET_F32_REG(insn, 15, regs))
#define GET_F32_RS2(insn, regs) (GET_F32_REG(insn, 20, regs))
--
2.34.1
--
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next prev parent reply other threads:[~2026-02-10 9:43 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-10 9:40 [PATCH 0/7] Fixes for load/store misaligned and access faults Bo Gan
2026-02-10 9:40 ` [PATCH 1/7] include: sbi: Add more mstatus and instruction encoding Bo Gan
2026-03-20 4:40 ` Anup Patel
2026-02-10 9:40 ` [PATCH 2/7] include: sbi: Add sbi_regs_prev_xlen Bo Gan
2026-03-20 4:42 ` Anup Patel
2026-02-10 9:40 ` [PATCH 3/7] include: sbi: Add GET_RDS_NUM/SET(_FP32/_FP64)_RDS macros Bo Gan
2026-03-20 4:44 ` Anup Patel
2026-02-10 9:40 ` Bo Gan [this message]
2026-03-20 4:45 ` [PATCH 4/7] include: sbi: set FS dirty in vsstatus when V=1 Anup Patel
2026-02-10 9:40 ` [PATCH 5/7] lib: sbi: Do not override emulator callback for vector load/store Bo Gan
2026-03-20 5:13 ` Anup Patel
2026-03-21 4:50 ` Bo Gan
2026-02-10 9:40 ` [PATCH 6/7] lib: sbi: Rework load/store emulator instruction decoding Bo Gan
2026-02-10 16:08 ` Andrew Jones
2026-02-11 10:36 ` Bo Gan
2026-02-11 15:01 ` Andrew Jones
2026-04-02 0:02 ` Bo Gan
2026-02-10 9:40 ` [PATCH 7/7] [NOT-FOR-UPSTREAM] Test program for misaligned load/store Bo Gan
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