Use what is currently the SMP=y version of riscv_cpuid_to_hartid_mask()
for both SMP=y and SMP=n to fix a build failure with KVM=m and SMP=n due
to boot_cpu_hartid not being exported. This also fixes a second bug
where the SMP=n version assumes the sole CPU in the system is in the
incoming mask, which may not hold true in kvm_riscv_vcpu_sbi_ecall() if
the KVM guest VM has multiple vCPUs (on a SMP=n system).
Fixes: 1ef46c231df4 ("RISC-V: Implement new SBI v0.2 extensions")
Reported-by: Adam Borowski <[email protected]>
Cc: [email protected]
Reviewed-by: Anup Patel <[email protected]>
Signed-off-by: Sean Christopherson <[email protected]>
---
arch/riscv/include/asm/smp.h | 10 ++--------
arch/riscv/kernel/setup.c | 10 ++++++++++
arch/riscv/kernel/smp.c | 10 ----------
3 files changed, 12 insertions(+), 18 deletions(-)
diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h
index a7d2811f3536..62d0e6e61da8 100644
--- a/arch/riscv/include/asm/smp.h
+++ b/arch/riscv/include/asm/smp.h
@@ -43,7 +43,6 @@ void arch_send_call_function_ipi_mask(struct cpumask *mask);
void arch_send_call_function_single_ipi(int cpu);
int riscv_hartid_to_cpuid(int hartid);
-void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out);
/* Set custom IPI operations */
void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops);
@@ -85,13 +84,6 @@ static inline unsigned long cpuid_to_hartid_map(int cpu)
return boot_cpu_hartid;
}
-static inline void riscv_cpuid_to_hartid_mask(const struct cpumask *in,
- struct cpumask *out)
-{
- cpumask_clear(out);
- cpumask_set_cpu(boot_cpu_hartid, out);
-}
-
static inline void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops)
{
}
@@ -102,6 +94,8 @@ static inline void riscv_clear_ipi(void)
#endif /* CONFIG_SMP */
+void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out);
+
#if defined(CONFIG_HOTPLUG_CPU) && (CONFIG_SMP)
bool cpu_has_hotplug(unsigned int cpu);
#else
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index b42bfdc67482..63241abe84eb 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -59,6 +59,16 @@ atomic_t hart_lottery __section(".sdata")
unsigned long boot_cpu_hartid;
static DEFINE_PER_CPU(struct cpu, cpu_devices);
+void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out)
+{
+ int cpu;
+
+ cpumask_clear(out);
+ for_each_cpu(cpu, in)
+ cpumask_set_cpu(cpuid_to_hartid_map(cpu), out);
+}
+EXPORT_SYMBOL_GPL(riscv_cpuid_to_hartid_mask);
+
/*
* Place kernel memory regions on the resource tree so that
* kexec-tools can retrieve them from /proc/iomem. While there
diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c
index 2f6da845c9ae..b5d30ea92292 100644
--- a/arch/riscv/kernel/smp.c
+++ b/arch/riscv/kernel/smp.c
@@ -59,16 +59,6 @@ int riscv_hartid_to_cpuid(int hartid)
return -ENOENT;
}
-void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out)
-{
- int cpu;
-
- cpumask_clear(out);
- for_each_cpu(cpu, in)
- cpumask_set_cpu(cpuid_to_hartid_map(cpu), out);
-}
-EXPORT_SYMBOL_GPL(riscv_cpuid_to_hartid_mask);
-
bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
{
return phys_id == cpuid_to_hartid_map(cpu);
--
2.34.0.rc2.393.gf8c9666880-goog
On Mon, 29 Nov 2021 13:43:42 PST (-0800), [email protected] wrote:
> Use what is currently the SMP=y version of riscv_cpuid_to_hartid_mask()
> for both SMP=y and SMP=n to fix a build failure with KVM=m and SMP=n due
> to boot_cpu_hartid not being exported. This also fixes a second bug
> where the SMP=n version assumes the sole CPU in the system is in the
> incoming mask, which may not hold true in kvm_riscv_vcpu_sbi_ecall() if
> the KVM guest VM has multiple vCPUs (on a SMP=n system).
>
> Fixes: 1ef46c231df4 ("RISC-V: Implement new SBI v0.2 extensions")
> Reported-by: Adam Borowski <[email protected]>
> Cc: [email protected]
> Reviewed-by: Anup Patel <[email protected]>
> Signed-off-by: Sean Christopherson <[email protected]>
This is on for-next, thanks!
> ---
> arch/riscv/include/asm/smp.h | 10 ++--------
> arch/riscv/kernel/setup.c | 10 ++++++++++
> arch/riscv/kernel/smp.c | 10 ----------
> 3 files changed, 12 insertions(+), 18 deletions(-)
>
> diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h
> index a7d2811f3536..62d0e6e61da8 100644
> --- a/arch/riscv/include/asm/smp.h
> +++ b/arch/riscv/include/asm/smp.h
> @@ -43,7 +43,6 @@ void arch_send_call_function_ipi_mask(struct cpumask *mask);
> void arch_send_call_function_single_ipi(int cpu);
>
> int riscv_hartid_to_cpuid(int hartid);
> -void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out);
>
> /* Set custom IPI operations */
> void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops);
> @@ -85,13 +84,6 @@ static inline unsigned long cpuid_to_hartid_map(int cpu)
> return boot_cpu_hartid;
> }
>
> -static inline void riscv_cpuid_to_hartid_mask(const struct cpumask *in,
> - struct cpumask *out)
> -{
> - cpumask_clear(out);
> - cpumask_set_cpu(boot_cpu_hartid, out);
> -}
> -
> static inline void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops)
> {
> }
> @@ -102,6 +94,8 @@ static inline void riscv_clear_ipi(void)
>
> #endif /* CONFIG_SMP */
>
> +void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out);
> +
> #if defined(CONFIG_HOTPLUG_CPU) && (CONFIG_SMP)
> bool cpu_has_hotplug(unsigned int cpu);
> #else
> diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
> index b42bfdc67482..63241abe84eb 100644
> --- a/arch/riscv/kernel/setup.c
> +++ b/arch/riscv/kernel/setup.c
> @@ -59,6 +59,16 @@ atomic_t hart_lottery __section(".sdata")
> unsigned long boot_cpu_hartid;
> static DEFINE_PER_CPU(struct cpu, cpu_devices);
>
> +void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out)
> +{
> + int cpu;
> +
> + cpumask_clear(out);
> + for_each_cpu(cpu, in)
> + cpumask_set_cpu(cpuid_to_hartid_map(cpu), out);
> +}
> +EXPORT_SYMBOL_GPL(riscv_cpuid_to_hartid_mask);
> +
> /*
> * Place kernel memory regions on the resource tree so that
> * kexec-tools can retrieve them from /proc/iomem. While there
> diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c
> index 2f6da845c9ae..b5d30ea92292 100644
> --- a/arch/riscv/kernel/smp.c
> +++ b/arch/riscv/kernel/smp.c
> @@ -59,16 +59,6 @@ int riscv_hartid_to_cpuid(int hartid)
> return -ENOENT;
> }
>
> -void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out)
> -{
> - int cpu;
> -
> - cpumask_clear(out);
> - for_each_cpu(cpu, in)
> - cpumask_set_cpu(cpuid_to_hartid_map(cpu), out);
> -}
> -EXPORT_SYMBOL_GPL(riscv_cpuid_to_hartid_mask);
> -
> bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
> {
> return phys_id == cpuid_to_hartid_map(cpu);