Message ID | 20240328033303.883674-2-peterlin@andestech.com |
---|---|
State | Accepted |
Headers | show |
Series | Minor fixes for domain context switch | expand |
On Thu, Mar 28, 2024 at 9:03 AM Yu Chien Peter Lin <peterlin@andestech.com> wrote: > > SCOUNTEREN and SENVCFG may not be supported on certain RISC-V core, > so check the existence of these CSRs via privilege spec version to > prevent illegal instructions. > > Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com> > Signed-off-by: Alvin Chang <alvinga@andestech.com> LGTM. Reviewed-by: Anup Patel <anup@brainfault.org> Applied this patch to the riscv/opensbi repo. Thanks, Anup > --- > Changes v2: > - No change > --- > lib/sbi/sbi_domain_context.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/lib/sbi/sbi_domain_context.c b/lib/sbi/sbi_domain_context.c > index d83a2ba2..a41dc8c7 100755 > --- a/lib/sbi/sbi_domain_context.c > +++ b/lib/sbi/sbi_domain_context.c > @@ -54,8 +54,10 @@ static void switch_to_next_domain_context(struct sbi_context *ctx, > ctx->scause = csr_swap(CSR_SCAUSE, dom_ctx->scause); > ctx->stval = csr_swap(CSR_STVAL, dom_ctx->stval); > ctx->satp = csr_swap(CSR_SATP, dom_ctx->satp); > - ctx->scounteren = csr_swap(CSR_SCOUNTEREN, dom_ctx->scounteren); > - ctx->senvcfg = csr_swap(CSR_SENVCFG, dom_ctx->senvcfg); > + if (sbi_hart_priv_version(scratch) >= SBI_HART_PRIV_VER_1_10) > + ctx->scounteren = csr_swap(CSR_SCOUNTEREN, dom_ctx->scounteren); > + if (sbi_hart_priv_version(scratch) >= SBI_HART_PRIV_VER_1_12) > + ctx->senvcfg = csr_swap(CSR_SENVCFG, dom_ctx->senvcfg); > > /* Save current trap state and restore target domain's trap state */ > trap_regs = (struct sbi_trap_regs *)(csr_read(CSR_MSCRATCH) - > -- > 2.34.1 >
diff --git a/lib/sbi/sbi_domain_context.c b/lib/sbi/sbi_domain_context.c index d83a2ba2..a41dc8c7 100755 --- a/lib/sbi/sbi_domain_context.c +++ b/lib/sbi/sbi_domain_context.c @@ -54,8 +54,10 @@ static void switch_to_next_domain_context(struct sbi_context *ctx, ctx->scause = csr_swap(CSR_SCAUSE, dom_ctx->scause); ctx->stval = csr_swap(CSR_STVAL, dom_ctx->stval); ctx->satp = csr_swap(CSR_SATP, dom_ctx->satp); - ctx->scounteren = csr_swap(CSR_SCOUNTEREN, dom_ctx->scounteren); - ctx->senvcfg = csr_swap(CSR_SENVCFG, dom_ctx->senvcfg); + if (sbi_hart_priv_version(scratch) >= SBI_HART_PRIV_VER_1_10) + ctx->scounteren = csr_swap(CSR_SCOUNTEREN, dom_ctx->scounteren); + if (sbi_hart_priv_version(scratch) >= SBI_HART_PRIV_VER_1_12) + ctx->senvcfg = csr_swap(CSR_SENVCFG, dom_ctx->senvcfg); /* Save current trap state and restore target domain's trap state */ trap_regs = (struct sbi_trap_regs *)(csr_read(CSR_MSCRATCH) -