diff options
| author | Radim Krčmář <rkrcmar@ventanamicro.com> | 2025-04-29 16:25:47 +0200 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2025-04-30 10:14:26 +0530 |
| commit | 8c814b5c9b03aac0d6bb2366e3c8fbce132ca4d9 (patch) | |
| tree | a29074c3a5768f32f7368f34c5945905458c9e92 | |
| parent | 6b877fb53b8da84c69f0832c7f2a343239ba609e (diff) | |
| download | opensbi-8c814b5c9b03aac0d6bb2366e3c8fbce132ca4d9.zip opensbi-8c814b5c9b03aac0d6bb2366e3c8fbce132ca4d9.tar.gz opensbi-8c814b5c9b03aac0d6bb2366e3c8fbce132ca4d9.tar.bz2 | |
lib: sbi_hart: fix sstateen emulation
The Sstateen extension defines 4 sstateen registers, but SBI currently
configures the execution environment to throw illegal instruction
exception when accessing sstateen1-3.
SBI should implement all sstateen registers, so delegate the
implementation to hardware by setting the SE bit.
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Radim Krčmář <rkrcmar@ventanamicro.com>
Link: https://lore.kernel.org/r/20250429142549.3673976-7-rkrcmar@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
| -rw-r--r-- | lib/sbi/sbi_hart.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c index bdf66ef..fc37b24 100644 --- a/lib/sbi/sbi_hart.c +++ b/lib/sbi/sbi_hart.c @@ -111,6 +111,9 @@ static void mstatus_init(struct sbi_scratch *scratch) mstateen_val &= ~SMSTATEEN0_CTR; csr_write64(CSR_MSTATEEN0, mstateen_val); + csr_write64(CSR_MSTATEEN1, SMSTATEEN_STATEN); + csr_write64(CSR_MSTATEEN2, SMSTATEEN_STATEN); + csr_write64(CSR_MSTATEEN3, SMSTATEEN_STATEN); if (misa_extension('S')) csr_write(CSR_SSTATEEN0, 0); |