Few v0.1 SBI calls are being replaced by new SBI calls that follows
v0.2 calling convention. The specification changes can be found at
riscv/riscv-sbi-doc#27
Implement the replacement extensions and few additional new SBI
function calls that makes way for a better SBI interface in future.
Signed-off-by: Atish Patra <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
---
arch/riscv/include/asm/sbi.h | 35 ++++++
arch/riscv/kernel/sbi.c | 208 +++++++++++++++++++++++++++++++++--
2 files changed, 236 insertions(+), 7 deletions(-)
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index cc82ae63f8e0..54ba9eebec11 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -22,6 +22,9 @@ enum sbi_ext_id {
SBI_EXT_0_1_SHUTDOWN = 0x8,
#endif
SBI_EXT_BASE = 0x10,
+ SBI_EXT_TIME = 0x54494D45,
+ SBI_EXT_IPI = 0x735049,
+ SBI_EXT_RFENCE = 0x52464E43,
};
enum sbi_ext_base_fid {
@@ -34,6 +37,24 @@ enum sbi_ext_base_fid {
SBI_BASE_GET_MIMPID,
};
+enum sbi_ext_time_fid {
+ SBI_EXT_TIME_SET_TIMER = 0,
+};
+
+enum sbi_ext_ipi_fid {
+ SBI_EXT_IPI_SEND_IPI = 0,
+};
+
+enum sbi_ext_rfence_fid {
+ SBI_EXT_RFENCE_REMOTE_FENCE_I = 0,
+ SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
+ SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
+ SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
+ SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
+ SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
+ SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
+};
+
#define SBI_SPEC_VERSION_DEFAULT 0x1
#define SBI_SPEC_VERSION_MAJOR_OFFSET 24
#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
@@ -74,6 +95,20 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
unsigned long start,
unsigned long size,
unsigned long asid);
+int sbi_remote_hfence_gvma(const unsigned long *hart_mask,
+ unsigned long start,
+ unsigned long size);
+int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask,
+ unsigned long start,
+ unsigned long size,
+ unsigned long vmid);
+int sbi_remote_hfence_vvma(const unsigned long *hart_mask,
+ unsigned long start,
+ unsigned long size);
+int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask,
+ unsigned long start,
+ unsigned long size,
+ unsigned long asid);
int sbi_probe_extension(long ext);
/* Check if current SBI specification version is 0.1 or not */
diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c
index ee710bfe0b0e..af3d5f8d8af7 100644
--- a/arch/riscv/kernel/sbi.c
+++ b/arch/riscv/kernel/sbi.c
@@ -205,6 +205,101 @@ static int __sbi_rfence_v01(unsigned long ext, unsigned long fid,
}
#endif /* CONFIG_RISCV_SBI_V01 */
+static void __sbi_set_timer_v02(uint64_t stime_value)
+{
+#if __riscv_xlen == 32
+ sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, stime_value,
+ stime_value >> 32, 0, 0, 0, 0);
+#else
+ sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, stime_value, 0,
+ 0, 0, 0, 0);
+#endif
+}
+
+static int __sbi_send_ipi_v02(const unsigned long *hart_mask)
+{
+ unsigned long hmask_val;
+ struct sbiret ret = {0};
+ int result;
+
+ if (!hart_mask)
+ hmask_val = *(cpumask_bits(cpu_online_mask));
+ else
+ hmask_val = *hart_mask;
+
+ ret = sbi_ecall(SBI_EXT_IPI, SBI_EXT_IPI_SEND_IPI, hmask_val,
+ 0, 0, 0, 0, 0);
+ if (ret.error) {
+ pr_err("%s: failed with error [%d]\n", __func__,
+ sbi_err_map_linux_errno(ret.error));
+ result = ret.error;
+ } else
+ result = ret.value;
+
+ return result;
+}
+
+static int __sbi_rfence_v02(unsigned long extid, unsigned long fid,
+ const unsigned long *hart_mask,
+ unsigned long hbase, unsigned long start,
+ unsigned long size, unsigned long arg4,
+ unsigned long arg5)
+{
+ unsigned long hmask_val;
+ struct sbiret ret = {0};
+ int result;
+ unsigned long ext = SBI_EXT_RFENCE;
+
+ if (!hart_mask)
+ hmask_val = *(cpumask_bits(cpu_online_mask));
+ else
+ hmask_val = *hart_mask;
+
+ switch (fid) {
+ case SBI_EXT_RFENCE_REMOTE_FENCE_I:
+ ret = sbi_ecall(ext, fid, hmask_val, 0, 0, 0, 0, 0);
+ break;
+ case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA:
+ ret = sbi_ecall(ext, fid, hmask_val, 0, start,
+ size, 0, 0);
+ break;
+ case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID:
+ ret = sbi_ecall(ext, fid, hmask_val, 0, start,
+ size, arg4, 0);
+ break;
+ /*TODO: Handle non zero hbase cases */
+ case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA:
+ ret = sbi_ecall(ext, fid, hmask_val, 0, start,
+ size, 0, 0);
+ break;
+ case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:
+ ret = sbi_ecall(ext, fid, hmask_val, 0, start,
+ size, arg4, 0);
+ break;
+ case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA:
+ ret = sbi_ecall(ext, fid, hmask_val, 0, start,
+ size, 0, 0);
+ break;
+ case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID:
+ ret = sbi_ecall(ext, fid, hmask_val, 0, start,
+ size, arg4, 0);
+ break;
+ default:
+ pr_err("unknown function ID [%lu] for SBI extension [%lu]\n",
+ fid, ext);
+ result = -EINVAL;
+ }
+
+ if (ret.error) {
+ pr_err("%s: failed with error [%d]\n", __func__,
+ sbi_err_map_linux_errno(ret.error));
+ result = ret.error;
+ } else
+ result = ret.value;
+
+ return result;
+}
+
/**
* sbi_set_timer() - Program the timer for next timer event.
* @stime_value: The value after which next timer event should fire.
@@ -237,7 +332,7 @@ EXPORT_SYMBOL(sbi_send_ipi);
*/
void sbi_remote_fence_i(const unsigned long *hart_mask)
{
- __sbi_rfence(SBI_EXT_0_1_REMOTE_FENCE_I, 0,
+ __sbi_rfence(SBI_EXT_0_1_REMOTE_FENCE_I, SBI_EXT_RFENCE_REMOTE_FENCE_I,
hart_mask, 0, 0, 0, 0, 0);
}
EXPORT_SYMBOL(sbi_remote_fence_i);
@@ -255,7 +350,8 @@ void sbi_remote_sfence_vma(const unsigned long *hart_mask,
unsigned long start,
unsigned long size)
{
- __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA, 0,
+ __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA,
+ SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
hart_mask, 0, start, size, 0, 0);
}
EXPORT_SYMBOL(sbi_remote_sfence_vma);
@@ -276,11 +372,93 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
unsigned long size,
unsigned long asid)
{
- __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID, 0,
+ __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID,
+ SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
hart_mask, 0, start, size, asid, 0);
}
EXPORT_SYMBOL(sbi_remote_sfence_vma_asid);
+/**
+ * sbi_remote_hfence_gvma() - Execute HFENCE.GVMA instructions on given remote
+ * harts for the specified guest physical address range.
+ * @hart_mask: A cpu mask containing all the target harts.
+ * @start: Start of the guest physical address
+ * @size: Total size of the guest physical address range.
+ *
+ * Return: None
+ */
+int sbi_remote_hfence_gvma(const unsigned long *hart_mask,
+ unsigned long start,
+ unsigned long size)
+{
+ return __sbi_rfence(SBI_EXT_RFENCE, SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
+ hart_mask, 0, start, size, 0, 0);
+}
+EXPORT_SYMBOL_GPL(sbi_remote_hfence_gvma);
+
+/**
+ * sbi_remote_hfence_gvma_vmid() - Execute HFENCE.GVMA instructions on given
+ * remote harts for a guest physical address range belonging to a specific VMID.
+ *
+ * @hart_mask: A cpu mask containing all the target harts.
+ * @start: Start of the guest physical address
+ * @size: Total size of the guest physical address range.
+ * @vmid: The value of guest ID (VMID).
+ *
+ * Return: 0 if success, Error otherwise.
+ */
+int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask,
+ unsigned long start,
+ unsigned long size,
+ unsigned long vmid)
+{
+ return __sbi_rfence(SBI_EXT_RFENCE,
+ SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
+ hart_mask, 0, start, size, vmid, 0);
+}
+EXPORT_SYMBOL(sbi_remote_hfence_gvma_vmid);
+
+/**
+ * sbi_remote_hfence_vvma() - Execute HFENCE.VVMA instructions on given remote
+ * harts for the current guest virtual address range.
+ * @hart_mask: A cpu mask containing all the target harts.
+ * @start: Start of the current guest virtual address
+ * @size: Total size of the current guest virtual address range.
+ *
+ * Return: None
+ */
+int sbi_remote_hfence_vvma(const unsigned long *hart_mask,
+ unsigned long start,
+ unsigned long size)
+{
+ return __sbi_rfence(SBI_EXT_RFENCE, SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
+ hart_mask, 0, start, size, 0, 0);
+}
+EXPORT_SYMBOL(sbi_remote_hfence_vvma);
+
+/**
+ * sbi_remote_hfence_vvma_asid() - Execute HFENCE.VVMA instructions on given
+ * remote harts for current guest virtual address range belonging to a specific
+ * ASID.
+ *
+ * @hart_mask: A cpu mask containing all the target harts.
+ * @start: Start of the current guest virtual address
+ * @size: Total size of the current guest virtual address range.
+ * @asid: The value of address space identifier (ASID).
+ *
+ * Return: None
+ */
+int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask,
+ unsigned long start,
+ unsigned long size,
+ unsigned long asid)
+{
+ return __sbi_rfence(SBI_EXT_RFENCE,
+ SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
+ hart_mask, 0, start, size, asid, 0);
+}
+EXPORT_SYMBOL(sbi_remote_hfence_vvma_asid);
+
/**
* sbi_probe_extension() - Check if an SBI extension ID is supported or not.
* @extid: The extension ID to be probed.
@@ -356,11 +534,27 @@ int __init sbi_init(void)
if (!sbi_spec_is_0_1()) {
pr_info("SBI implementation ID=0x%lx Version=0x%lx\n",
sbi_get_firmware_id(), sbi_get_firmware_version());
+ if (sbi_probe_extension(SBI_EXT_TIME) > 0) {
+ __sbi_set_timer = __sbi_set_timer_v02;
+ pr_info("SBI v0.2 TIME extension detected\n");
+ } else
+ __sbi_set_timer = __sbi_set_timer_dummy_warn;
+ if (sbi_probe_extension(SBI_EXT_IPI) > 0) {
+ __sbi_send_ipi = __sbi_send_ipi_v02;
+ pr_info("SBI v0.2 IPI extension detected\n");
+ } else
+ __sbi_send_ipi = __sbi_send_ipi_dummy_warn;
+ if (sbi_probe_extension(SBI_EXT_RFENCE) > 0) {
+ __sbi_rfence = __sbi_rfence_v02;
+ pr_info("SBI v0.2 RFENCE extension detected\n");
+ } else
+ __sbi_rfence = __sbi_rfence_dummy_warn;
+
+ } else {
+ __sbi_set_timer = __sbi_set_timer_v01;
+ __sbi_send_ipi = __sbi_send_ipi_v01;
+ __sbi_rfence = __sbi_rfence_v01;
}
- __sbi_set_timer = __sbi_set_timer_v01;
- __sbi_send_ipi = __sbi_send_ipi_v01;
- __sbi_rfence = __sbi_rfence_v01;
-
return 0;
}
--
2.23.0
Hi Atish,
Found few bugs while playing with this patch.
See below ....
On Wed, Nov 27, 2019 at 12:35 AM Atish Patra <[email protected]> wrote:
>
> Few v0.1 SBI calls are being replaced by new SBI calls that follows
> v0.2 calling convention. The specification changes can be found at
>
> riscv/riscv-sbi-doc#27
>
> Implement the replacement extensions and few additional new SBI
> function calls that makes way for a better SBI interface in future.
>
> Signed-off-by: Atish Patra <[email protected]>
> Reviewed-by: Anup Patel <[email protected]>
> ---
> arch/riscv/include/asm/sbi.h | 35 ++++++
> arch/riscv/kernel/sbi.c | 208 +++++++++++++++++++++++++++++++++--
> 2 files changed, 236 insertions(+), 7 deletions(-)
>
> diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
> index cc82ae63f8e0..54ba9eebec11 100644
> --- a/arch/riscv/include/asm/sbi.h
> +++ b/arch/riscv/include/asm/sbi.h
> @@ -22,6 +22,9 @@ enum sbi_ext_id {
> SBI_EXT_0_1_SHUTDOWN = 0x8,
> #endif
> SBI_EXT_BASE = 0x10,
> + SBI_EXT_TIME = 0x54494D45,
> + SBI_EXT_IPI = 0x735049,
> + SBI_EXT_RFENCE = 0x52464E43,
> };
>
> enum sbi_ext_base_fid {
> @@ -34,6 +37,24 @@ enum sbi_ext_base_fid {
> SBI_BASE_GET_MIMPID,
> };
>
> +enum sbi_ext_time_fid {
> + SBI_EXT_TIME_SET_TIMER = 0,
> +};
> +
> +enum sbi_ext_ipi_fid {
> + SBI_EXT_IPI_SEND_IPI = 0,
> +};
> +
> +enum sbi_ext_rfence_fid {
> + SBI_EXT_RFENCE_REMOTE_FENCE_I = 0,
> + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
> + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
> + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
> + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
> + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
> + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
> +};
> +
> #define SBI_SPEC_VERSION_DEFAULT 0x1
> #define SBI_SPEC_VERSION_MAJOR_OFFSET 24
> #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
> @@ -74,6 +95,20 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
> unsigned long start,
> unsigned long size,
> unsigned long asid);
> +int sbi_remote_hfence_gvma(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size);
> +int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size,
> + unsigned long vmid);
> +int sbi_remote_hfence_vvma(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size);
> +int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size,
> + unsigned long asid);
> int sbi_probe_extension(long ext);
>
> /* Check if current SBI specification version is 0.1 or not */
> diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c
> index ee710bfe0b0e..af3d5f8d8af7 100644
> --- a/arch/riscv/kernel/sbi.c
> +++ b/arch/riscv/kernel/sbi.c
> @@ -205,6 +205,101 @@ static int __sbi_rfence_v01(unsigned long ext, unsigned long fid,
> }
> #endif /* CONFIG_RISCV_SBI_V01 */
>
> +static void __sbi_set_timer_v02(uint64_t stime_value)
> +{
> +#if __riscv_xlen == 32
> + sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, stime_value,
> + stime_value >> 32, 0, 0, 0, 0);
> +#else
> + sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, stime_value, 0,
> + 0, 0, 0, 0);
> +#endif
> +}
> +
> +static int __sbi_send_ipi_v02(const unsigned long *hart_mask)
> +{
> + unsigned long hmask_val;
> + struct sbiret ret = {0};
> + int result;
> +
> + if (!hart_mask)
> + hmask_val = *(cpumask_bits(cpu_online_mask));
> + else
> + hmask_val = *hart_mask;
> +
> + ret = sbi_ecall(SBI_EXT_IPI, SBI_EXT_IPI_SEND_IPI, hmask_val,
> + 0, 0, 0, 0, 0);
> + if (ret.error) {
> + pr_err("%s: failed with error [%d]\n", __func__,
> + sbi_err_map_linux_errno(ret.error));
> + result = ret.error;
> + } else
> + result = ret.value;
> +
> + return result;
> +}
> +
> +static int __sbi_rfence_v02(unsigned long extid, unsigned long fid,
> + const unsigned long *hart_mask,
> + unsigned long hbase, unsigned long start,
> + unsigned long size, unsigned long arg4,
> + unsigned long arg5)
> +{
> + unsigned long hmask_val;
> + struct sbiret ret = {0};
> + int result;
> + unsigned long ext = SBI_EXT_RFENCE;
> +
> + if (!hart_mask)
> + hmask_val = *(cpumask_bits(cpu_online_mask));
> + else
> + hmask_val = *hart_mask;
> +
> + switch (fid) {
> + case SBI_EXT_RFENCE_REMOTE_FENCE_I:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, 0, 0, 0, 0);
> + break;
> + case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> + size, 0, 0);
> + break;
> + case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> + size, arg4, 0);
> + break;
> + /*TODO: Handle non zero hbase cases */
> + case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> + size, 0, 0);
> + break;
> + case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> + size, arg4, 0);
> + break;
> + case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> + size, 0, 0);
> + break;
> + case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> + size, arg4, 0);
> + break;
> + default:
> + pr_err("unknown function ID [%lu] for SBI extension [%lu]\n",
> + fid, ext);
> + result = -EINVAL;
> + }
> +
> + if (ret.error) {
> + pr_err("%s: failed with error [%d]\n", __func__,
> + sbi_err_map_linux_errno(ret.error));
> + result = ret.error;
> + } else
> + result = ret.value;
> +
> + return result;
> +}
> +
> /**
> * sbi_set_timer() - Program the timer for next timer event.
> * @stime_value: The value after which next timer event should fire.
> @@ -237,7 +332,7 @@ EXPORT_SYMBOL(sbi_send_ipi);
> */
> void sbi_remote_fence_i(const unsigned long *hart_mask)
> {
> - __sbi_rfence(SBI_EXT_0_1_REMOTE_FENCE_I, 0,
> + __sbi_rfence(SBI_EXT_0_1_REMOTE_FENCE_I, SBI_EXT_RFENCE_REMOTE_FENCE_I,
> hart_mask, 0, 0, 0, 0, 0);
> }
> EXPORT_SYMBOL(sbi_remote_fence_i);
> @@ -255,7 +350,8 @@ void sbi_remote_sfence_vma(const unsigned long *hart_mask,
> unsigned long start,
> unsigned long size)
> {
> - __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA, 0,
> + __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA,
> + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
> hart_mask, 0, start, size, 0, 0);
> }
> EXPORT_SYMBOL(sbi_remote_sfence_vma);
> @@ -276,11 +372,93 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
> unsigned long size,
> unsigned long asid)
> {
> - __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID, 0,
> + __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID,
> + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
> hart_mask, 0, start, size, asid, 0);
> }
> EXPORT_SYMBOL(sbi_remote_sfence_vma_asid);
>
> +/**
> + * sbi_remote_hfence_gvma() - Execute HFENCE.GVMA instructions on given remote
> + * harts for the specified guest physical address range.
> + * @hart_mask: A cpu mask containing all the target harts.
> + * @start: Start of the guest physical address
> + * @size: Total size of the guest physical address range.
> + *
> + * Return: None
> + */
> +int sbi_remote_hfence_gvma(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size)
> +{
> + return __sbi_rfence(SBI_EXT_RFENCE, SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
> + hart_mask, 0, start, size, 0, 0);
> +}
> +EXPORT_SYMBOL_GPL(sbi_remote_hfence_gvma);
> +
> +/**
> + * sbi_remote_hfence_gvma_vmid() - Execute HFENCE.GVMA instructions on given
> + * remote harts for a guest physical address range belonging to a specific VMID.
> + *
> + * @hart_mask: A cpu mask containing all the target harts.
> + * @start: Start of the guest physical address
> + * @size: Total size of the guest physical address range.
> + * @vmid: The value of guest ID (VMID).
> + *
> + * Return: 0 if success, Error otherwise.
> + */
> +int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size,
> + unsigned long vmid)
> +{
> + return __sbi_rfence(SBI_EXT_RFENCE,
> + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
> + hart_mask, 0, start, size, vmid, 0);
> +}
> +EXPORT_SYMBOL(sbi_remote_hfence_gvma_vmid);
> +
> +/**
> + * sbi_remote_hfence_vvma() - Execute HFENCE.VVMA instructions on given remote
> + * harts for the current guest virtual address range.
> + * @hart_mask: A cpu mask containing all the target harts.
> + * @start: Start of the current guest virtual address
> + * @size: Total size of the current guest virtual address range.
> + *
> + * Return: None
> + */
> +int sbi_remote_hfence_vvma(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size)
> +{
> + return __sbi_rfence(SBI_EXT_RFENCE, SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
> + hart_mask, 0, start, size, 0, 0);
> +}
> +EXPORT_SYMBOL(sbi_remote_hfence_vvma);
> +
> +/**
> + * sbi_remote_hfence_vvma_asid() - Execute HFENCE.VVMA instructions on given
> + * remote harts for current guest virtual address range belonging to a specific
> + * ASID.
> + *
> + * @hart_mask: A cpu mask containing all the target harts.
> + * @start: Start of the current guest virtual address
> + * @size: Total size of the current guest virtual address range.
> + * @asid: The value of address space identifier (ASID).
> + *
> + * Return: None
> + */
> +int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size,
> + unsigned long asid)
> +{
> + return __sbi_rfence(SBI_EXT_RFENCE,
> + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
> + hart_mask, 0, start, size, asid, 0);
> +}
> +EXPORT_SYMBOL(sbi_remote_hfence_vvma_asid);
> +
> /**
> * sbi_probe_extension() - Check if an SBI extension ID is supported or not.
> * @extid: The extension ID to be probed.
> @@ -356,11 +534,27 @@ int __init sbi_init(void)
> if (!sbi_spec_is_0_1()) {
> pr_info("SBI implementation ID=0x%lx Version=0x%lx\n",
> sbi_get_firmware_id(), sbi_get_firmware_version());
> + if (sbi_probe_extension(SBI_EXT_TIME) > 0) {
> + __sbi_set_timer = __sbi_set_timer_v02;
> + pr_info("SBI v0.2 TIME extension detected\n");
> + } else
> + __sbi_set_timer = __sbi_set_timer_dummy_warn;
This should be:
#if IS_ENABLED(RISCV_SBI_V01)
__sbi_rfence = __sbi_set_timer_v01;
#else
__sbi_rfence = __sbi_set_timer_dummy_warn;
#endif
> + if (sbi_probe_extension(SBI_EXT_IPI) > 0) {
> + __sbi_send_ipi = __sbi_send_ipi_v02;
> + pr_info("SBI v0.2 IPI extension detected\n");
> + } else
> + __sbi_send_ipi = __sbi_send_ipi_dummy_warn;
This should be:
#if IS_ENABLED(RISCV_SBI_V01)
__sbi_rfence = __sbi_ipi_v01;
#else
__sbi_rfence = __sbi_send_ipi_dummy_warn;
#endif
> + if (sbi_probe_extension(SBI_EXT_RFENCE) > 0) {
> + __sbi_rfence = __sbi_rfence_v02;
> + pr_info("SBI v0.2 RFENCE extension detected\n");
> + } else
> + __sbi_rfence = __sbi_rfence_dummy_warn;
This should be:
#if IS_ENABLED(RISCV_SBI_V01)
__sbi_rfence = __sbi_rfence_v01;
#else
__sbi_rfence = __sbi_rfence_dummy_warn;
#endif
> +
> + } else {
> + __sbi_set_timer = __sbi_set_timer_v01;
> + __sbi_send_ipi = __sbi_send_ipi_v01;
> + __sbi_rfence = __sbi_rfence_v01;
This should be:
#if IS_ENABLED(RISCV_SBI_V01)
__sbi_set_timer = __sbi_set_timer_v01;
__sbi_send_ipi = __sbi_send_ipi_v01;
__sbi_rfence = __sbi_rfence_v01;
#else
__sbi_set_timer = __sbi_set_timer_dummy_warn;
__sbi_send_ipi = __sbi_send_ipi_dummy_warn;
__sbi_rfence = __sbi_rfence_dummy_warn;
#endif
> }
>
> - __sbi_set_timer = __sbi_set_timer_v01;
> - __sbi_send_ipi = __sbi_send_ipi_v01;
> - __sbi_rfence = __sbi_rfence_v01;
> -
> return 0;
> }
> --
> 2.23.0
>
Regards,
Anup
On Fri, Nov 29, 2019 at 10:21 AM Anup Patel <[email protected]> wrote:
>
> Hi Atish,
>
> Found few bugs while playing with this patch.
>
> See below ....
>
> On Wed, Nov 27, 2019 at 12:35 AM Atish Patra <[email protected]> wrote:
> >
> > Few v0.1 SBI calls are being replaced by new SBI calls that follows
> > v0.2 calling convention. The specification changes can be found at
> >
> > riscv/riscv-sbi-doc#27
> >
> > Implement the replacement extensions and few additional new SBI
> > function calls that makes way for a better SBI interface in future.
> >
> > Signed-off-by: Atish Patra <[email protected]>
> > Reviewed-by: Anup Patel <[email protected]>
> > ---
> > arch/riscv/include/asm/sbi.h | 35 ++++++
> > arch/riscv/kernel/sbi.c | 208 +++++++++++++++++++++++++++++++++--
> > 2 files changed, 236 insertions(+), 7 deletions(-)
> >
> > diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
> > index cc82ae63f8e0..54ba9eebec11 100644
> > --- a/arch/riscv/include/asm/sbi.h
> > +++ b/arch/riscv/include/asm/sbi.h
> > @@ -22,6 +22,9 @@ enum sbi_ext_id {
> > SBI_EXT_0_1_SHUTDOWN = 0x8,
> > #endif
> > SBI_EXT_BASE = 0x10,
> > + SBI_EXT_TIME = 0x54494D45,
> > + SBI_EXT_IPI = 0x735049,
> > + SBI_EXT_RFENCE = 0x52464E43,
> > };
> >
> > enum sbi_ext_base_fid {
> > @@ -34,6 +37,24 @@ enum sbi_ext_base_fid {
> > SBI_BASE_GET_MIMPID,
> > };
> >
> > +enum sbi_ext_time_fid {
> > + SBI_EXT_TIME_SET_TIMER = 0,
> > +};
> > +
> > +enum sbi_ext_ipi_fid {
> > + SBI_EXT_IPI_SEND_IPI = 0,
> > +};
> > +
> > +enum sbi_ext_rfence_fid {
> > + SBI_EXT_RFENCE_REMOTE_FENCE_I = 0,
> > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
> > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
> > +};
> > +
> > #define SBI_SPEC_VERSION_DEFAULT 0x1
> > #define SBI_SPEC_VERSION_MAJOR_OFFSET 24
> > #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
> > @@ -74,6 +95,20 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
> > unsigned long start,
> > unsigned long size,
> > unsigned long asid);
> > +int sbi_remote_hfence_gvma(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size);
> > +int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size,
> > + unsigned long vmid);
> > +int sbi_remote_hfence_vvma(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size);
> > +int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size,
> > + unsigned long asid);
> > int sbi_probe_extension(long ext);
> >
> > /* Check if current SBI specification version is 0.1 or not */
> > diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c
> > index ee710bfe0b0e..af3d5f8d8af7 100644
> > --- a/arch/riscv/kernel/sbi.c
> > +++ b/arch/riscv/kernel/sbi.c
> > @@ -205,6 +205,101 @@ static int __sbi_rfence_v01(unsigned long ext, unsigned long fid,
> > }
> > #endif /* CONFIG_RISCV_SBI_V01 */
> >
> > +static void __sbi_set_timer_v02(uint64_t stime_value)
> > +{
> > +#if __riscv_xlen == 32
> > + sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, stime_value,
> > + stime_value >> 32, 0, 0, 0, 0);
> > +#else
> > + sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, stime_value, 0,
> > + 0, 0, 0, 0);
> > +#endif
> > +}
> > +
> > +static int __sbi_send_ipi_v02(const unsigned long *hart_mask)
> > +{
> > + unsigned long hmask_val;
> > + struct sbiret ret = {0};
> > + int result;
> > +
> > + if (!hart_mask)
> > + hmask_val = *(cpumask_bits(cpu_online_mask));
> > + else
> > + hmask_val = *hart_mask;
> > +
> > + ret = sbi_ecall(SBI_EXT_IPI, SBI_EXT_IPI_SEND_IPI, hmask_val,
> > + 0, 0, 0, 0, 0);
> > + if (ret.error) {
> > + pr_err("%s: failed with error [%d]\n", __func__,
> > + sbi_err_map_linux_errno(ret.error));
> > + result = ret.error;
> > + } else
> > + result = ret.value;
> > +
> > + return result;
> > +}
> > +
> > +static int __sbi_rfence_v02(unsigned long extid, unsigned long fid,
> > + const unsigned long *hart_mask,
> > + unsigned long hbase, unsigned long start,
> > + unsigned long size, unsigned long arg4,
> > + unsigned long arg5)
> > +{
> > + unsigned long hmask_val;
> > + struct sbiret ret = {0};
> > + int result;
> > + unsigned long ext = SBI_EXT_RFENCE;
> > +
> > + if (!hart_mask)
> > + hmask_val = *(cpumask_bits(cpu_online_mask));
> > + else
> > + hmask_val = *hart_mask;
> > +
> > + switch (fid) {
> > + case SBI_EXT_RFENCE_REMOTE_FENCE_I:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, 0, 0, 0, 0);
> > + break;
> > + case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > + size, 0, 0);
> > + break;
> > + case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > + size, arg4, 0);
> > + break;
> > + /*TODO: Handle non zero hbase cases */
> > + case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > + size, 0, 0);
> > + break;
> > + case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > + size, arg4, 0);
> > + break;
> > + case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > + size, 0, 0);
> > + break;
> > + case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > + size, arg4, 0);
> > + break;
> > + default:
> > + pr_err("unknown function ID [%lu] for SBI extension [%lu]\n",
> > + fid, ext);
> > + result = -EINVAL;
> > + }
> > +
> > + if (ret.error) {
> > + pr_err("%s: failed with error [%d]\n", __func__,
> > + sbi_err_map_linux_errno(ret.error));
> > + result = ret.error;
> > + } else
> > + result = ret.value;
> > +
> > + return result;
> > +}
> > +
> > /**
> > * sbi_set_timer() - Program the timer for next timer event.
> > * @stime_value: The value after which next timer event should fire.
> > @@ -237,7 +332,7 @@ EXPORT_SYMBOL(sbi_send_ipi);
> > */
> > void sbi_remote_fence_i(const unsigned long *hart_mask)
> > {
> > - __sbi_rfence(SBI_EXT_0_1_REMOTE_FENCE_I, 0,
> > + __sbi_rfence(SBI_EXT_0_1_REMOTE_FENCE_I, SBI_EXT_RFENCE_REMOTE_FENCE_I,
> > hart_mask, 0, 0, 0, 0, 0);
> > }
> > EXPORT_SYMBOL(sbi_remote_fence_i);
> > @@ -255,7 +350,8 @@ void sbi_remote_sfence_vma(const unsigned long *hart_mask,
> > unsigned long start,
> > unsigned long size)
> > {
> > - __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA, 0,
> > + __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA,
> > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
> > hart_mask, 0, start, size, 0, 0);
> > }
> > EXPORT_SYMBOL(sbi_remote_sfence_vma);
> > @@ -276,11 +372,93 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
> > unsigned long size,
> > unsigned long asid)
> > {
> > - __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID, 0,
> > + __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID,
> > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
> > hart_mask, 0, start, size, asid, 0);
> > }
> > EXPORT_SYMBOL(sbi_remote_sfence_vma_asid);
> >
> > +/**
> > + * sbi_remote_hfence_gvma() - Execute HFENCE.GVMA instructions on given remote
> > + * harts for the specified guest physical address range.
> > + * @hart_mask: A cpu mask containing all the target harts.
> > + * @start: Start of the guest physical address
> > + * @size: Total size of the guest physical address range.
> > + *
> > + * Return: None
> > + */
> > +int sbi_remote_hfence_gvma(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size)
> > +{
> > + return __sbi_rfence(SBI_EXT_RFENCE, SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
> > + hart_mask, 0, start, size, 0, 0);
> > +}
> > +EXPORT_SYMBOL_GPL(sbi_remote_hfence_gvma);
> > +
> > +/**
> > + * sbi_remote_hfence_gvma_vmid() - Execute HFENCE.GVMA instructions on given
> > + * remote harts for a guest physical address range belonging to a specific VMID.
> > + *
> > + * @hart_mask: A cpu mask containing all the target harts.
> > + * @start: Start of the guest physical address
> > + * @size: Total size of the guest physical address range.
> > + * @vmid: The value of guest ID (VMID).
> > + *
> > + * Return: 0 if success, Error otherwise.
> > + */
> > +int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size,
> > + unsigned long vmid)
> > +{
> > + return __sbi_rfence(SBI_EXT_RFENCE,
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
> > + hart_mask, 0, start, size, vmid, 0);
> > +}
> > +EXPORT_SYMBOL(sbi_remote_hfence_gvma_vmid);
> > +
> > +/**
> > + * sbi_remote_hfence_vvma() - Execute HFENCE.VVMA instructions on given remote
> > + * harts for the current guest virtual address range.
> > + * @hart_mask: A cpu mask containing all the target harts.
> > + * @start: Start of the current guest virtual address
> > + * @size: Total size of the current guest virtual address range.
> > + *
> > + * Return: None
> > + */
> > +int sbi_remote_hfence_vvma(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size)
> > +{
> > + return __sbi_rfence(SBI_EXT_RFENCE, SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
> > + hart_mask, 0, start, size, 0, 0);
> > +}
> > +EXPORT_SYMBOL(sbi_remote_hfence_vvma);
> > +
> > +/**
> > + * sbi_remote_hfence_vvma_asid() - Execute HFENCE.VVMA instructions on given
> > + * remote harts for current guest virtual address range belonging to a specific
> > + * ASID.
> > + *
> > + * @hart_mask: A cpu mask containing all the target harts.
> > + * @start: Start of the current guest virtual address
> > + * @size: Total size of the current guest virtual address range.
> > + * @asid: The value of address space identifier (ASID).
> > + *
> > + * Return: None
> > + */
> > +int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size,
> > + unsigned long asid)
> > +{
> > + return __sbi_rfence(SBI_EXT_RFENCE,
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
> > + hart_mask, 0, start, size, asid, 0);
> > +}
> > +EXPORT_SYMBOL(sbi_remote_hfence_vvma_asid);
> > +
> > /**
> > * sbi_probe_extension() - Check if an SBI extension ID is supported or not.
> > * @extid: The extension ID to be probed.
> > @@ -356,11 +534,27 @@ int __init sbi_init(void)
> > if (!sbi_spec_is_0_1()) {
> > pr_info("SBI implementation ID=0x%lx Version=0x%lx\n",
> > sbi_get_firmware_id(), sbi_get_firmware_version());
> > + if (sbi_probe_extension(SBI_EXT_TIME) > 0) {
> > + __sbi_set_timer = __sbi_set_timer_v02;
> > + pr_info("SBI v0.2 TIME extension detected\n");
> > + } else
> > + __sbi_set_timer = __sbi_set_timer_dummy_warn;
> This should be:
>
> #if IS_ENABLED(RISCV_SBI_V01)
> __sbi_rfence = __sbi_set_timer_v01;
> #else
> __sbi_rfence = __sbi_set_timer_dummy_warn;
> #endif
Instead of this, just do the following:
__sbi_rfence = __sbi_set_timer_v01;
>
> > + if (sbi_probe_extension(SBI_EXT_IPI) > 0) {
> > + __sbi_send_ipi = __sbi_send_ipi_v02;
> > + pr_info("SBI v0.2 IPI extension detected\n");
> > + } else
> > + __sbi_send_ipi = __sbi_send_ipi_dummy_warn;
> This should be:
>
> #if IS_ENABLED(RISCV_SBI_V01)
> __sbi_rfence = __sbi_ipi_v01;
> #else
> __sbi_rfence = __sbi_send_ipi_dummy_warn;
> #endif
Instead of this, just do the following:
__sbi_rfence = __sbi_ipi_v01;
>
> > + if (sbi_probe_extension(SBI_EXT_RFENCE) > 0) {
> > + __sbi_rfence = __sbi_rfence_v02;
> > + pr_info("SBI v0.2 RFENCE extension detected\n");
> > + } else
> > + __sbi_rfence = __sbi_rfence_dummy_warn;
> This should be:
>
> #if IS_ENABLED(RISCV_SBI_V01)
> __sbi_rfence = __sbi_rfence_v01;
> #else
> __sbi_rfence = __sbi_rfence_dummy_warn;
> #endif
Instead of this, just do the following:
__sbi_rfence = __sbi_rfence_v01;
>
> > +
> > + } else {
> > + __sbi_set_timer = __sbi_set_timer_v01;
> > + __sbi_send_ipi = __sbi_send_ipi_v01;
> > + __sbi_rfence = __sbi_rfence_v01;
>
> This should be:
>
> #if IS_ENABLED(RISCV_SBI_V01)
> __sbi_set_timer = __sbi_set_timer_v01;
> __sbi_send_ipi = __sbi_send_ipi_v01;
> __sbi_rfence = __sbi_rfence_v01;
> #else
> __sbi_set_timer = __sbi_set_timer_dummy_warn;
> __sbi_send_ipi = __sbi_send_ipi_dummy_warn;
> __sbi_rfence = __sbi_rfence_dummy_warn;
> #endif
This is not required.
> > }
> >
> > - __sbi_set_timer = __sbi_set_timer_v01;
> > - __sbi_send_ipi = __sbi_send_ipi_v01;
> > - __sbi_rfence = __sbi_rfence_v01;
> > -
> > return 0;
> > }
> > --
> > 2.23.0
> >
>
> Regards,
> Anup
Regards,
Anup
On Tue, 26 Nov 2019 11:05:03 PST (-0800), Atish Patra wrote:
> Few v0.1 SBI calls are being replaced by new SBI calls that follows
> v0.2 calling convention. The specification changes can be found at
>
> riscv/riscv-sbi-doc#27
>
> Implement the replacement extensions and few additional new SBI
> function calls that makes way for a better SBI interface in future.
>
> Signed-off-by: Atish Patra <[email protected]>
> Reviewed-by: Anup Patel <[email protected]>
> ---
> arch/riscv/include/asm/sbi.h | 35 ++++++
> arch/riscv/kernel/sbi.c | 208 +++++++++++++++++++++++++++++++++--
> 2 files changed, 236 insertions(+), 7 deletions(-)
>
> diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
> index cc82ae63f8e0..54ba9eebec11 100644
> --- a/arch/riscv/include/asm/sbi.h
> +++ b/arch/riscv/include/asm/sbi.h
> @@ -22,6 +22,9 @@ enum sbi_ext_id {
> SBI_EXT_0_1_SHUTDOWN = 0x8,
> #endif
> SBI_EXT_BASE = 0x10,
> + SBI_EXT_TIME = 0x54494D45,
> + SBI_EXT_IPI = 0x735049,
> + SBI_EXT_RFENCE = 0x52464E43,
> };
>
> enum sbi_ext_base_fid {
> @@ -34,6 +37,24 @@ enum sbi_ext_base_fid {
> SBI_BASE_GET_MIMPID,
> };
>
> +enum sbi_ext_time_fid {
> + SBI_EXT_TIME_SET_TIMER = 0,
> +};
> +
> +enum sbi_ext_ipi_fid {
> + SBI_EXT_IPI_SEND_IPI = 0,
> +};
> +
> +enum sbi_ext_rfence_fid {
> + SBI_EXT_RFENCE_REMOTE_FENCE_I = 0,
> + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
> + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
> + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
> + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
> + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
> + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
> +};
> +
> #define SBI_SPEC_VERSION_DEFAULT 0x1
> #define SBI_SPEC_VERSION_MAJOR_OFFSET 24
> #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
> @@ -74,6 +95,20 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
> unsigned long start,
> unsigned long size,
> unsigned long asid);
> +int sbi_remote_hfence_gvma(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size);
> +int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size,
> + unsigned long vmid);
> +int sbi_remote_hfence_vvma(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size);
> +int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size,
> + unsigned long asid);
> int sbi_probe_extension(long ext);
>
> /* Check if current SBI specification version is 0.1 or not */
> diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c
> index ee710bfe0b0e..af3d5f8d8af7 100644
> --- a/arch/riscv/kernel/sbi.c
> +++ b/arch/riscv/kernel/sbi.c
> @@ -205,6 +205,101 @@ static int __sbi_rfence_v01(unsigned long ext, unsigned long fid,
> }
> #endif /* CONFIG_RISCV_SBI_V01 */
>
> +static void __sbi_set_timer_v02(uint64_t stime_value)
> +{
> +#if __riscv_xlen == 32
> + sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, stime_value,
> + stime_value >> 32, 0, 0, 0, 0);
> +#else
> + sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, stime_value, 0,
> + 0, 0, 0, 0);
> +#endif
> +}
> +
> +static int __sbi_send_ipi_v02(const unsigned long *hart_mask)
> +{
> + unsigned long hmask_val;
> + struct sbiret ret = {0};
> + int result;
> +
> + if (!hart_mask)
> + hmask_val = *(cpumask_bits(cpu_online_mask));
> + else
> + hmask_val = *hart_mask;
> +
> + ret = sbi_ecall(SBI_EXT_IPI, SBI_EXT_IPI_SEND_IPI, hmask_val,
> + 0, 0, 0, 0, 0);
> + if (ret.error) {
> + pr_err("%s: failed with error [%d]\n", __func__,
> + sbi_err_map_linux_errno(ret.error));
> + result = ret.error;
> + } else
> + result = ret.value;
> +
> + return result;
> +}
> +
> +static int __sbi_rfence_v02(unsigned long extid, unsigned long fid,
> + const unsigned long *hart_mask,
> + unsigned long hbase, unsigned long start,
> + unsigned long size, unsigned long arg4,
> + unsigned long arg5)
> +{
> + unsigned long hmask_val;
> + struct sbiret ret = {0};
> + int result;
> + unsigned long ext = SBI_EXT_RFENCE;
> +
> + if (!hart_mask)
> + hmask_val = *(cpumask_bits(cpu_online_mask));
This needs to map from CPUs to harts. Even if we're frobbing all of the harts
they might still be different.
> + else
> + hmask_val = *hart_mask;
> +
> + switch (fid) {
> + case SBI_EXT_RFENCE_REMOTE_FENCE_I:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, 0, 0, 0, 0);
> + break;
> + case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> + size, 0, 0);
> + break;
> + case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> + size, arg4, 0);
> + break;
> + /*TODO: Handle non zero hbase cases */
> + case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> + size, 0, 0);
> + break;
> + case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> + size, arg4, 0);
> + break;
> + case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> + size, 0, 0);
> + break;
> + case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID:
> + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> + size, arg4, 0);
> + break;
> + default:
> + pr_err("unknown function ID [%lu] for SBI extension [%lu]\n",
> + fid, ext);
> + result = -EINVAL;
> + }
> +
> + if (ret.error) {
> + pr_err("%s: failed with error [%d]\n", __func__,
> + sbi_err_map_linux_errno(ret.error));
> + result = ret.error;
> + } else
> + result = ret.value;
> +
> + return result;
> +}
> +
> /**
> * sbi_set_timer() - Program the timer for next timer event.
> * @stime_value: The value after which next timer event should fire.
> @@ -237,7 +332,7 @@ EXPORT_SYMBOL(sbi_send_ipi);
> */
> void sbi_remote_fence_i(const unsigned long *hart_mask)
> {
> - __sbi_rfence(SBI_EXT_0_1_REMOTE_FENCE_I, 0,
> + __sbi_rfence(SBI_EXT_0_1_REMOTE_FENCE_I, SBI_EXT_RFENCE_REMOTE_FENCE_I,
> hart_mask, 0, 0, 0, 0, 0);
> }
> EXPORT_SYMBOL(sbi_remote_fence_i);
> @@ -255,7 +350,8 @@ void sbi_remote_sfence_vma(const unsigned long *hart_mask,
> unsigned long start,
> unsigned long size)
> {
> - __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA, 0,
> + __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA,
> + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
> hart_mask, 0, start, size, 0, 0);
> }
> EXPORT_SYMBOL(sbi_remote_sfence_vma);
> @@ -276,11 +372,93 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
> unsigned long size,
> unsigned long asid)
> {
> - __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID, 0,
> + __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID,
> + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
> hart_mask, 0, start, size, asid, 0);
> }
> EXPORT_SYMBOL(sbi_remote_sfence_vma_asid);
>
> +/**
> + * sbi_remote_hfence_gvma() - Execute HFENCE.GVMA instructions on given remote
> + * harts for the specified guest physical address range.
> + * @hart_mask: A cpu mask containing all the target harts.
> + * @start: Start of the guest physical address
> + * @size: Total size of the guest physical address range.
> + *
> + * Return: None
> + */
> +int sbi_remote_hfence_gvma(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size)
> +{
> + return __sbi_rfence(SBI_EXT_RFENCE, SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
> + hart_mask, 0, start, size, 0, 0);
> +}
> +EXPORT_SYMBOL_GPL(sbi_remote_hfence_gvma);
> +
> +/**
> + * sbi_remote_hfence_gvma_vmid() - Execute HFENCE.GVMA instructions on given
> + * remote harts for a guest physical address range belonging to a specific VMID.
> + *
> + * @hart_mask: A cpu mask containing all the target harts.
> + * @start: Start of the guest physical address
> + * @size: Total size of the guest physical address range.
> + * @vmid: The value of guest ID (VMID).
> + *
> + * Return: 0 if success, Error otherwise.
> + */
> +int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size,
> + unsigned long vmid)
> +{
> + return __sbi_rfence(SBI_EXT_RFENCE,
> + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
> + hart_mask, 0, start, size, vmid, 0);
> +}
> +EXPORT_SYMBOL(sbi_remote_hfence_gvma_vmid);
> +
> +/**
> + * sbi_remote_hfence_vvma() - Execute HFENCE.VVMA instructions on given remote
> + * harts for the current guest virtual address range.
> + * @hart_mask: A cpu mask containing all the target harts.
> + * @start: Start of the current guest virtual address
> + * @size: Total size of the current guest virtual address range.
> + *
> + * Return: None
> + */
> +int sbi_remote_hfence_vvma(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size)
> +{
> + return __sbi_rfence(SBI_EXT_RFENCE, SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
> + hart_mask, 0, start, size, 0, 0);
> +}
> +EXPORT_SYMBOL(sbi_remote_hfence_vvma);
> +
> +/**
> + * sbi_remote_hfence_vvma_asid() - Execute HFENCE.VVMA instructions on given
> + * remote harts for current guest virtual address range belonging to a specific
> + * ASID.
> + *
> + * @hart_mask: A cpu mask containing all the target harts.
> + * @start: Start of the current guest virtual address
> + * @size: Total size of the current guest virtual address range.
> + * @asid: The value of address space identifier (ASID).
> + *
> + * Return: None
> + */
> +int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask,
> + unsigned long start,
> + unsigned long size,
> + unsigned long asid)
> +{
> + return __sbi_rfence(SBI_EXT_RFENCE,
> + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
> + hart_mask, 0, start, size, asid, 0);
> +}
> +EXPORT_SYMBOL(sbi_remote_hfence_vvma_asid);
> +
> /**
> * sbi_probe_extension() - Check if an SBI extension ID is supported or not.
> * @extid: The extension ID to be probed.
> @@ -356,11 +534,27 @@ int __init sbi_init(void)
> if (!sbi_spec_is_0_1()) {
> pr_info("SBI implementation ID=0x%lx Version=0x%lx\n",
> sbi_get_firmware_id(), sbi_get_firmware_version());
> + if (sbi_probe_extension(SBI_EXT_TIME) > 0) {
> + __sbi_set_timer = __sbi_set_timer_v02;
> + pr_info("SBI v0.2 TIME extension detected\n");
> + } else
> + __sbi_set_timer = __sbi_set_timer_dummy_warn;
> + if (sbi_probe_extension(SBI_EXT_IPI) > 0) {
> + __sbi_send_ipi = __sbi_send_ipi_v02;
> + pr_info("SBI v0.2 IPI extension detected\n");
> + } else
> + __sbi_send_ipi = __sbi_send_ipi_dummy_warn;
> + if (sbi_probe_extension(SBI_EXT_RFENCE) > 0) {
> + __sbi_rfence = __sbi_rfence_v02;
> + pr_info("SBI v0.2 RFENCE extension detected\n");
> + } else
> + __sbi_rfence = __sbi_rfence_dummy_warn;
> +
> + } else {
> + __sbi_set_timer = __sbi_set_timer_v01;
> + __sbi_send_ipi = __sbi_send_ipi_v01;
> + __sbi_rfence = __sbi_rfence_v01;
> }
>
> - __sbi_set_timer = __sbi_set_timer_v01;
> - __sbi_send_ipi = __sbi_send_ipi_v01;
> - __sbi_rfence = __sbi_rfence_v01;
> -
> return 0;
> }
This will have to change around when disentangling the legacy vs v0.1 stuff.
On Fri, 2019-11-29 at 10:27 +0530, Anup Patel wrote:
> On Fri, Nov 29, 2019 at 10:21 AM Anup Patel <[email protected]>
> wrote:
> > Hi Atish,
> >
> > Found few bugs while playing with this patch.
> >
> > See below ....
> >
> > On Wed, Nov 27, 2019 at 12:35 AM Atish Patra <[email protected]>
> > wrote:
> > > Few v0.1 SBI calls are being replaced by new SBI calls that
> > > follows
> > > v0.2 calling convention. The specification changes can be found
> > > at
> > >
> > > riscv/riscv-sbi-doc#27
> > >
> > > Implement the replacement extensions and few additional new SBI
> > > function calls that makes way for a better SBI interface in
> > > future.
> > >
> > > Signed-off-by: Atish Patra <[email protected]>
> > > Reviewed-by: Anup Patel <[email protected]>
> > > ---
> > > arch/riscv/include/asm/sbi.h | 35 ++++++
> > > arch/riscv/kernel/sbi.c | 208
> > > +++++++++++++++++++++++++++++++++--
> > > 2 files changed, 236 insertions(+), 7 deletions(-)
> > >
> > > diff --git a/arch/riscv/include/asm/sbi.h
> > > b/arch/riscv/include/asm/sbi.h
> > > index cc82ae63f8e0..54ba9eebec11 100644
> > > --- a/arch/riscv/include/asm/sbi.h
> > > +++ b/arch/riscv/include/asm/sbi.h
> > > @@ -22,6 +22,9 @@ enum sbi_ext_id {
> > > SBI_EXT_0_1_SHUTDOWN = 0x8,
> > > #endif
> > > SBI_EXT_BASE = 0x10,
> > > + SBI_EXT_TIME = 0x54494D45,
> > > + SBI_EXT_IPI = 0x735049,
> > > + SBI_EXT_RFENCE = 0x52464E43,
> > > };
> > >
> > > enum sbi_ext_base_fid {
> > > @@ -34,6 +37,24 @@ enum sbi_ext_base_fid {
> > > SBI_BASE_GET_MIMPID,
> > > };
> > >
> > > +enum sbi_ext_time_fid {
> > > + SBI_EXT_TIME_SET_TIMER = 0,
> > > +};
> > > +
> > > +enum sbi_ext_ipi_fid {
> > > + SBI_EXT_IPI_SEND_IPI = 0,
> > > +};
> > > +
> > > +enum sbi_ext_rfence_fid {
> > > + SBI_EXT_RFENCE_REMOTE_FENCE_I = 0,
> > > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
> > > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
> > > + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
> > > + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
> > > + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
> > > + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
> > > +};
> > > +
> > > #define SBI_SPEC_VERSION_DEFAULT 0x1
> > > #define SBI_SPEC_VERSION_MAJOR_OFFSET 24
> > > #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
> > > @@ -74,6 +95,20 @@ void sbi_remote_sfence_vma_asid(const unsigned
> > > long *hart_mask,
> > > unsigned long start,
> > > unsigned long size,
> > > unsigned long asid);
> > > +int sbi_remote_hfence_gvma(const unsigned long *hart_mask,
> > > + unsigned long start,
> > > + unsigned long size);
> > > +int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask,
> > > + unsigned long start,
> > > + unsigned long size,
> > > + unsigned long vmid);
> > > +int sbi_remote_hfence_vvma(const unsigned long *hart_mask,
> > > + unsigned long start,
> > > + unsigned long size);
> > > +int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask,
> > > + unsigned long start,
> > > + unsigned long size,
> > > + unsigned long asid);
> > > int sbi_probe_extension(long ext);
> > >
> > > /* Check if current SBI specification version is 0.1 or not */
> > > diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c
> > > index ee710bfe0b0e..af3d5f8d8af7 100644
> > > --- a/arch/riscv/kernel/sbi.c
> > > +++ b/arch/riscv/kernel/sbi.c
> > > @@ -205,6 +205,101 @@ static int __sbi_rfence_v01(unsigned long
> > > ext, unsigned long fid,
> > > }
> > > #endif /* CONFIG_RISCV_SBI_V01 */
> > >
> > > +static void __sbi_set_timer_v02(uint64_t stime_value)
> > > +{
> > > +#if __riscv_xlen == 32
> > > + sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER,
> > > stime_value,
> > > + stime_value >> 32, 0, 0, 0, 0);
> > > +#else
> > > + sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER,
> > > stime_value, 0,
> > > + 0, 0, 0, 0);
> > > +#endif
> > > +}
> > > +
> > > +static int __sbi_send_ipi_v02(const unsigned long *hart_mask)
> > > +{
> > > + unsigned long hmask_val;
> > > + struct sbiret ret = {0};
> > > + int result;
> > > +
> > > + if (!hart_mask)
> > > + hmask_val = *(cpumask_bits(cpu_online_mask));
> > > + else
> > > + hmask_val = *hart_mask;
> > > +
> > > + ret = sbi_ecall(SBI_EXT_IPI, SBI_EXT_IPI_SEND_IPI,
> > > hmask_val,
> > > + 0, 0, 0, 0, 0);
> > > + if (ret.error) {
> > > + pr_err("%s: failed with error [%d]\n", __func__,
> > > + sbi_err_map_linux_errno(ret.error));
> > > + result = ret.error;
> > > + } else
> > > + result = ret.value;
> > > +
> > > + return result;
> > > +}
> > > +
> > > +static int __sbi_rfence_v02(unsigned long extid, unsigned long
> > > fid,
> > > + const unsigned long *hart_mask,
> > > + unsigned long hbase, unsigned long
> > > start,
> > > + unsigned long size, unsigned long
> > > arg4,
> > > + unsigned long arg5)
> > > +{
> > > + unsigned long hmask_val;
> > > + struct sbiret ret = {0};
> > > + int result;
> > > + unsigned long ext = SBI_EXT_RFENCE;
> > > +
> > > + if (!hart_mask)
> > > + hmask_val = *(cpumask_bits(cpu_online_mask));
> > > + else
> > > + hmask_val = *hart_mask;
> > > +
> > > + switch (fid) {
> > > + case SBI_EXT_RFENCE_REMOTE_FENCE_I:
> > > + ret = sbi_ecall(ext, fid, hmask_val, 0, 0, 0, 0,
> > > 0);
> > > + break;
> > > + case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA:
> > > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > > + size, 0, 0);
> > > + break;
> > > + case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID:
> > > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > > + size, arg4, 0);
> > > + break;
> > > + /*TODO: Handle non zero hbase cases */
> > > + case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA:
> > > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > > + size, 0, 0);
> > > + break;
> > > + case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:
> > > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > > + size, arg4, 0);
> > > + break;
> > > + case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA:
> > > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > > + size, 0, 0);
> > > + break;
> > > + case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID:
> > > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > > + size, arg4, 0);
> > > + break;
> > > + default:
> > > + pr_err("unknown function ID [%lu] for SBI
> > > extension [%lu]\n",
> > > + fid, ext);
> > > + result = -EINVAL;
> > > + }
> > > +
> > > + if (ret.error) {
> > > + pr_err("%s: failed with error [%d]\n", __func__,
> > > + sbi_err_map_linux_errno(ret.error));
> > > + result = ret.error;
> > > + } else
> > > + result = ret.value;
> > > +
> > > + return result;
> > > +}
> > > +
> > > /**
> > > * sbi_set_timer() - Program the timer for next timer event.
> > > * @stime_value: The value after which next timer event should
> > > fire.
> > > @@ -237,7 +332,7 @@ EXPORT_SYMBOL(sbi_send_ipi);
> > > */
> > > void sbi_remote_fence_i(const unsigned long *hart_mask)
> > > {
> > > - __sbi_rfence(SBI_EXT_0_1_REMOTE_FENCE_I, 0,
> > > + __sbi_rfence(SBI_EXT_0_1_REMOTE_FENCE_I,
> > > SBI_EXT_RFENCE_REMOTE_FENCE_I,
> > > hart_mask, 0, 0, 0, 0, 0);
> > > }
> > > EXPORT_SYMBOL(sbi_remote_fence_i);
> > > @@ -255,7 +350,8 @@ void sbi_remote_sfence_vma(const unsigned
> > > long *hart_mask,
> > > unsigned long start,
> > > unsigned long size)
> > > {
> > > - __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA, 0,
> > > + __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA,
> > > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
> > > hart_mask, 0, start, size, 0, 0);
> > > }
> > > EXPORT_SYMBOL(sbi_remote_sfence_vma);
> > > @@ -276,11 +372,93 @@ void sbi_remote_sfence_vma_asid(const
> > > unsigned long *hart_mask,
> > > unsigned long size,
> > > unsigned long asid)
> > > {
> > > - __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID, 0,
> > > + __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID,
> > > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
> > > hart_mask, 0, start, size, asid, 0);
> > > }
> > > EXPORT_SYMBOL(sbi_remote_sfence_vma_asid);
> > >
> > > +/**
> > > + * sbi_remote_hfence_gvma() - Execute HFENCE.GVMA instructions
> > > on given remote
> > > + * harts for the specified guest physical
> > > address range.
> > > + * @hart_mask: A cpu mask containing all the target harts.
> > > + * @start: Start of the guest physical address
> > > + * @size: Total size of the guest physical address range.
> > > + *
> > > + * Return: None
> > > + */
> > > +int sbi_remote_hfence_gvma(const unsigned long *hart_mask,
> > > + unsigned long start,
> > > + unsigned long size)
> > > +{
> > > + return __sbi_rfence(SBI_EXT_RFENCE,
> > > SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
> > > + hart_mask, 0, start, size, 0, 0);
> > > +}
> > > +EXPORT_SYMBOL_GPL(sbi_remote_hfence_gvma);
> > > +
> > > +/**
> > > + * sbi_remote_hfence_gvma_vmid() - Execute HFENCE.GVMA
> > > instructions on given
> > > + * remote harts for a guest physical address range belonging to
> > > a specific VMID.
> > > + *
> > > + * @hart_mask: A cpu mask containing all the target harts.
> > > + * @start: Start of the guest physical address
> > > + * @size: Total size of the guest physical address range.
> > > + * @vmid: The value of guest ID (VMID).
> > > + *
> > > + * Return: 0 if success, Error otherwise.
> > > + */
> > > +int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask,
> > > + unsigned long
> > > start,
> > > + unsigned long size,
> > > + unsigned long vmid)
> > > +{
> > > + return __sbi_rfence(SBI_EXT_RFENCE,
> > > + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMI
> > > D,
> > > + hart_mask, 0, start, size, vmid, 0);
> > > +}
> > > +EXPORT_SYMBOL(sbi_remote_hfence_gvma_vmid);
> > > +
> > > +/**
> > > + * sbi_remote_hfence_vvma() - Execute HFENCE.VVMA instructions
> > > on given remote
> > > + * harts for the current guest virtual
> > > address range.
> > > + * @hart_mask: A cpu mask containing all the target harts.
> > > + * @start: Start of the current guest virtual address
> > > + * @size: Total size of the current guest virtual address range.
> > > + *
> > > + * Return: None
> > > + */
> > > +int sbi_remote_hfence_vvma(const unsigned long *hart_mask,
> > > + unsigned long start,
> > > + unsigned long size)
> > > +{
> > > + return __sbi_rfence(SBI_EXT_RFENCE,
> > > SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
> > > + hart_mask, 0, start, size, 0, 0);
> > > +}
> > > +EXPORT_SYMBOL(sbi_remote_hfence_vvma);
> > > +
> > > +/**
> > > + * sbi_remote_hfence_vvma_asid() - Execute HFENCE.VVMA
> > > instructions on given
> > > + * remote harts for current guest virtual address range
> > > belonging to a specific
> > > + * ASID.
> > > + *
> > > + * @hart_mask: A cpu mask containing all the target harts.
> > > + * @start: Start of the current guest virtual address
> > > + * @size: Total size of the current guest virtual address range.
> > > + * @asid: The value of address space identifier (ASID).
> > > + *
> > > + * Return: None
> > > + */
> > > +int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask,
> > > + unsigned long
> > > start,
> > > + unsigned long size,
> > > + unsigned long asid)
> > > +{
> > > + return __sbi_rfence(SBI_EXT_RFENCE,
> > > + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASI
> > > D,
> > > + hart_mask, 0, start, size, asid, 0);
> > > +}
> > > +EXPORT_SYMBOL(sbi_remote_hfence_vvma_asid);
> > > +
> > > /**
> > > * sbi_probe_extension() - Check if an SBI extension ID is
> > > supported or not.
> > > * @extid: The extension ID to be probed.
> > > @@ -356,11 +534,27 @@ int __init sbi_init(void)
> > > if (!sbi_spec_is_0_1()) {
> > > pr_info("SBI implementation ID=0x%lx
> > > Version=0x%lx\n",
> > > sbi_get_firmware_id(),
> > > sbi_get_firmware_version());
> > > + if (sbi_probe_extension(SBI_EXT_TIME) > 0) {
> > > + __sbi_set_timer = __sbi_set_timer_v02;
> > > + pr_info("SBI v0.2 TIME extension
> > > detected\n");
> > > + } else
> > > + __sbi_set_timer =
> > > __sbi_set_timer_dummy_warn;
> > This should be:
> >
> > #if IS_ENABLED(RISCV_SBI_V01)
> > __sbi_rfence = __sbi_set_timer_v01;
> > #else
> > __sbi_rfence =
> > __sbi_set_timer_dummy_warn;
> > #endif
>
> Instead of this, just do the following:
> __sbi_rfence = __sbi_set_timer_v01;
>
> > > + if (sbi_probe_extension(SBI_EXT_IPI) > 0) {
> > > + __sbi_send_ipi = __sbi_send_ipi_v02;
> > > + pr_info("SBI v0.2 IPI extension
> > > detected\n");
> > > + } else
> > > + __sbi_send_ipi =
> > > __sbi_send_ipi_dummy_warn;
> > This should be:
> >
> > #if IS_ENABLED(RISCV_SBI_V01)
> > __sbi_rfence = __sbi_ipi_v01;
> > #else
> > __sbi_rfence = __sbi_send_ipi_dummy_warn;
> > #endif
>
> Instead of this, just do the following:
> __sbi_rfence = __sbi_ipi_v01;
>
> > > + if (sbi_probe_extension(SBI_EXT_RFENCE) > 0) {
> > > + __sbi_rfence = __sbi_rfence_v02;
> > > + pr_info("SBI v0.2 RFENCE extension
> > > detected\n");
> > > + } else
> > > + __sbi_rfence =
> > > __sbi_rfence_dummy_warn;
> > This should be:
> >
> > #if IS_ENABLED(RISCV_SBI_V01)
> > __sbi_rfence = __sbi_rfence_v01;
> > #else
> > __sbi_rfence = __sbi_rfence_dummy_warn;
> > #endif
>
> Instead of this, just do the following:
> __sbi_rfence = __sbi_rfence_v01;
> > > +
> > > + } else {
> > > + __sbi_set_timer = __sbi_set_timer_v01;
> > > + __sbi_send_ipi = __sbi_send_ipi_v01;
> > > + __sbi_rfence = __sbi_rfence_v01;
> >
> > This should be:
> >
> > #if IS_ENABLED(RISCV_SBI_V01)
> > __sbi_set_timer = __sbi_set_timer_v01;
> > __sbi_send_ipi = __sbi_send_ipi_v01;
> > __sbi_rfence = __sbi_rfence_v01;
> > #else
> > __sbi_set_timer = __sbi_set_timer_dummy_warn;
> > __sbi_send_ipi = __sbi_send_ipi_dummy_warn;
> > __sbi_rfence = __sbi_rfence_dummy_warn;
> > #endif
>
> This is not required.
>
Thanks for catching it. I will fix those in next version.
> > > }
> > >
> > > - __sbi_set_timer = __sbi_set_timer_v01;
> > > - __sbi_send_ipi = __sbi_send_ipi_v01;
> > > - __sbi_rfence = __sbi_rfence_v01;
> > > -
> > > return 0;
> > > }
> > > --
> > > 2.23.0
> > >
> >
> > Regards,
> > Anup
>
> Regards,
> Anup
--
Regards,
Atish
On Wed, 2019-12-04 at 10:52 -0800, Palmer Dabbelt wrote:
> On Tue, 26 Nov 2019 11:05:03 PST (-0800), Atish Patra wrote:
> > Few v0.1 SBI calls are being replaced by new SBI calls that follows
> > v0.2 calling convention. The specification changes can be found at
> >
> > riscv/riscv-sbi-doc#27
> >
> > Implement the replacement extensions and few additional new SBI
> > function calls that makes way for a better SBI interface in future.
> >
> > Signed-off-by: Atish Patra <[email protected]>
> > Reviewed-by: Anup Patel <[email protected]>
> > ---
> > arch/riscv/include/asm/sbi.h | 35 ++++++
> > arch/riscv/kernel/sbi.c | 208
> > +++++++++++++++++++++++++++++++++--
> > 2 files changed, 236 insertions(+), 7 deletions(-)
> >
> > diff --git a/arch/riscv/include/asm/sbi.h
> > b/arch/riscv/include/asm/sbi.h
> > index cc82ae63f8e0..54ba9eebec11 100644
> > --- a/arch/riscv/include/asm/sbi.h
> > +++ b/arch/riscv/include/asm/sbi.h
> > @@ -22,6 +22,9 @@ enum sbi_ext_id {
> > SBI_EXT_0_1_SHUTDOWN = 0x8,
> > #endif
> > SBI_EXT_BASE = 0x10,
> > + SBI_EXT_TIME = 0x54494D45,
> > + SBI_EXT_IPI = 0x735049,
> > + SBI_EXT_RFENCE = 0x52464E43,
> > };
> >
> > enum sbi_ext_base_fid {
> > @@ -34,6 +37,24 @@ enum sbi_ext_base_fid {
> > SBI_BASE_GET_MIMPID,
> > };
> >
> > +enum sbi_ext_time_fid {
> > + SBI_EXT_TIME_SET_TIMER = 0,
> > +};
> > +
> > +enum sbi_ext_ipi_fid {
> > + SBI_EXT_IPI_SEND_IPI = 0,
> > +};
> > +
> > +enum sbi_ext_rfence_fid {
> > + SBI_EXT_RFENCE_REMOTE_FENCE_I = 0,
> > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
> > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
> > +};
> > +
> > #define SBI_SPEC_VERSION_DEFAULT 0x1
> > #define SBI_SPEC_VERSION_MAJOR_OFFSET 24
> > #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
> > @@ -74,6 +95,20 @@ void sbi_remote_sfence_vma_asid(const unsigned
> > long *hart_mask,
> > unsigned long start,
> > unsigned long size,
> > unsigned long asid);
> > +int sbi_remote_hfence_gvma(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size);
> > +int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size,
> > + unsigned long vmid);
> > +int sbi_remote_hfence_vvma(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size);
> > +int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size,
> > + unsigned long asid);
> > int sbi_probe_extension(long ext);
> >
> > /* Check if current SBI specification version is 0.1 or not */
> > diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c
> > index ee710bfe0b0e..af3d5f8d8af7 100644
> > --- a/arch/riscv/kernel/sbi.c
> > +++ b/arch/riscv/kernel/sbi.c
> > @@ -205,6 +205,101 @@ static int __sbi_rfence_v01(unsigned long
> > ext, unsigned long fid,
> > }
> > #endif /* CONFIG_RISCV_SBI_V01 */
> >
> > +static void __sbi_set_timer_v02(uint64_t stime_value)
> > +{
> > +#if __riscv_xlen == 32
> > + sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, stime_value,
> > + stime_value >> 32, 0, 0, 0, 0);
> > +#else
> > + sbi_ecall(SBI_EXT_TIME, SBI_EXT_TIME_SET_TIMER, stime_value, 0,
> > + 0, 0, 0, 0);
> > +#endif
> > +}
> > +
> > +static int __sbi_send_ipi_v02(const unsigned long *hart_mask)
> > +{
> > + unsigned long hmask_val;
> > + struct sbiret ret = {0};
> > + int result;
> > +
> > + if (!hart_mask)
> > + hmask_val = *(cpumask_bits(cpu_online_mask));
> > + else
> > + hmask_val = *hart_mask;
> > +
> > + ret = sbi_ecall(SBI_EXT_IPI, SBI_EXT_IPI_SEND_IPI, hmask_val,
> > + 0, 0, 0, 0, 0);
> > + if (ret.error) {
> > + pr_err("%s: failed with error [%d]\n", __func__,
> > + sbi_err_map_linux_errno(ret.error));
> > + result = ret.error;
> > + } else
> > + result = ret.value;
> > +
> > + return result;
> > +}
> > +
> > +static int __sbi_rfence_v02(unsigned long extid, unsigned long
> > fid,
> > + const unsigned long *hart_mask,
> > + unsigned long hbase, unsigned long start,
> > + unsigned long size, unsigned long arg4,
> > + unsigned long arg5)
> > +{
> > + unsigned long hmask_val;
> > + struct sbiret ret = {0};
> > + int result;
> > + unsigned long ext = SBI_EXT_RFENCE;
> > +
> > + if (!hart_mask)
> > + hmask_val = *(cpumask_bits(cpu_online_mask));
>
> This needs to map from CPUs to harts. Even if we're frobbing all of
> the harts
> they might still be different.
>
Yes. You are correct. I will fix this.
> > + else
> > + hmask_val = *hart_mask;
> > +
> > + switch (fid) {
> > + case SBI_EXT_RFENCE_REMOTE_FENCE_I:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, 0, 0, 0, 0);
> > + break;
> > + case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > + size, 0, 0);
> > + break;
> > + case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > + size, arg4, 0);
> > + break;
> > + /*TODO: Handle non zero hbase cases */
> > + case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > + size, 0, 0);
> > + break;
> > + case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > + size, arg4, 0);
> > + break;
> > + case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > + size, 0, 0);
> > + break;
> > + case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID:
> > + ret = sbi_ecall(ext, fid, hmask_val, 0, start,
> > + size, arg4, 0);
> > + break;
> > + default:
> > + pr_err("unknown function ID [%lu] for SBI extension
> > [%lu]\n",
> > + fid, ext);
> > + result = -EINVAL;
> > + }
> > +
> > + if (ret.error) {
> > + pr_err("%s: failed with error [%d]\n", __func__,
> > + sbi_err_map_linux_errno(ret.error));
> > + result = ret.error;
> > + } else
> > + result = ret.value;
> > +
> > + return result;
> > +}
> > +
> > /**
> > * sbi_set_timer() - Program the timer for next timer event.
> > * @stime_value: The value after which next timer event should
> > fire.
> > @@ -237,7 +332,7 @@ EXPORT_SYMBOL(sbi_send_ipi);
> > */
> > void sbi_remote_fence_i(const unsigned long *hart_mask)
> > {
> > - __sbi_rfence(SBI_EXT_0_1_REMOTE_FENCE_I, 0,
> > + __sbi_rfence(SBI_EXT_0_1_REMOTE_FENCE_I,
> > SBI_EXT_RFENCE_REMOTE_FENCE_I,
> > hart_mask, 0, 0, 0, 0, 0);
> > }
> > EXPORT_SYMBOL(sbi_remote_fence_i);
> > @@ -255,7 +350,8 @@ void sbi_remote_sfence_vma(const unsigned long
> > *hart_mask,
> > unsigned long start,
> > unsigned long size)
> > {
> > - __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA, 0,
> > + __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA,
> > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
> > hart_mask, 0, start, size, 0, 0);
> > }
> > EXPORT_SYMBOL(sbi_remote_sfence_vma);
> > @@ -276,11 +372,93 @@ void sbi_remote_sfence_vma_asid(const
> > unsigned long *hart_mask,
> > unsigned long size,
> > unsigned long asid)
> > {
> > - __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID, 0,
> > + __sbi_rfence(SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID,
> > + SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
> > hart_mask, 0, start, size, asid, 0);
> > }
> > EXPORT_SYMBOL(sbi_remote_sfence_vma_asid);
> >
> > +/**
> > + * sbi_remote_hfence_gvma() - Execute HFENCE.GVMA instructions on
> > given remote
> > + * harts for the specified guest physical
> > address range.
> > + * @hart_mask: A cpu mask containing all the target harts.
> > + * @start: Start of the guest physical address
> > + * @size: Total size of the guest physical address range.
> > + *
> > + * Return: None
> > + */
> > +int sbi_remote_hfence_gvma(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size)
> > +{
> > + return __sbi_rfence(SBI_EXT_RFENCE,
> > SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA,
> > + hart_mask, 0, start, size, 0, 0);
> > +}
> > +EXPORT_SYMBOL_GPL(sbi_remote_hfence_gvma);
> > +
> > +/**
> > + * sbi_remote_hfence_gvma_vmid() - Execute HFENCE.GVMA
> > instructions on given
> > + * remote harts for a guest physical address range belonging to a
> > specific VMID.
> > + *
> > + * @hart_mask: A cpu mask containing all the target harts.
> > + * @start: Start of the guest physical address
> > + * @size: Total size of the guest physical address range.
> > + * @vmid: The value of guest ID (VMID).
> > + *
> > + * Return: 0 if success, Error otherwise.
> > + */
> > +int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size,
> > + unsigned long vmid)
> > +{
> > + return __sbi_rfence(SBI_EXT_RFENCE,
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID,
> > + hart_mask, 0, start, size, vmid, 0);
> > +}
> > +EXPORT_SYMBOL(sbi_remote_hfence_gvma_vmid);
> > +
> > +/**
> > + * sbi_remote_hfence_vvma() - Execute HFENCE.VVMA instructions on
> > given remote
> > + * harts for the current guest virtual
> > address range.
> > + * @hart_mask: A cpu mask containing all the target harts.
> > + * @start: Start of the current guest virtual address
> > + * @size: Total size of the current guest virtual address range.
> > + *
> > + * Return: None
> > + */
> > +int sbi_remote_hfence_vvma(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size)
> > +{
> > + return __sbi_rfence(SBI_EXT_RFENCE,
> > SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA,
> > + hart_mask, 0, start, size, 0, 0);
> > +}
> > +EXPORT_SYMBOL(sbi_remote_hfence_vvma);
> > +
> > +/**
> > + * sbi_remote_hfence_vvma_asid() - Execute HFENCE.VVMA
> > instructions on given
> > + * remote harts for current guest virtual address range belonging
> > to a specific
> > + * ASID.
> > + *
> > + * @hart_mask: A cpu mask containing all the target harts.
> > + * @start: Start of the current guest virtual address
> > + * @size: Total size of the current guest virtual address range.
> > + * @asid: The value of address space identifier (ASID).
> > + *
> > + * Return: None
> > + */
> > +int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask,
> > + unsigned long start,
> > + unsigned long size,
> > + unsigned long asid)
> > +{
> > + return __sbi_rfence(SBI_EXT_RFENCE,
> > + SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
> > + hart_mask, 0, start, size, asid, 0);
> > +}
> > +EXPORT_SYMBOL(sbi_remote_hfence_vvma_asid);
> > +
> > /**
> > * sbi_probe_extension() - Check if an SBI extension ID is
> > supported or not.
> > * @extid: The extension ID to be probed.
> > @@ -356,11 +534,27 @@ int __init sbi_init(void)
> > if (!sbi_spec_is_0_1()) {
> > pr_info("SBI implementation ID=0x%lx Version=0x%lx\n",
> > sbi_get_firmware_id(),
> > sbi_get_firmware_version());
> > + if (sbi_probe_extension(SBI_EXT_TIME) > 0) {
> > + __sbi_set_timer = __sbi_set_timer_v02;
> > + pr_info("SBI v0.2 TIME extension detected\n");
> > + } else
> > + __sbi_set_timer = __sbi_set_timer_dummy_warn;
> > + if (sbi_probe_extension(SBI_EXT_IPI) > 0) {
> > + __sbi_send_ipi = __sbi_send_ipi_v02;
> > + pr_info("SBI v0.2 IPI extension detected\n");
> > + } else
> > + __sbi_send_ipi = __sbi_send_ipi_dummy_warn;
> > + if (sbi_probe_extension(SBI_EXT_RFENCE) > 0) {
> > + __sbi_rfence = __sbi_rfence_v02;
> > + pr_info("SBI v0.2 RFENCE extension
> > detected\n");
> > + } else
> > + __sbi_rfence = __sbi_rfence_dummy_warn;
> > +
> > + } else {
> > + __sbi_set_timer = __sbi_set_timer_v01;
> > + __sbi_send_ipi = __sbi_send_ipi_v01;
> > + __sbi_rfence = __sbi_rfence_v01;
> > }
> >
> > - __sbi_set_timer = __sbi_set_timer_v01;
> > - __sbi_send_ipi = __sbi_send_ipi_v01;
> > - __sbi_rfence = __sbi_rfence_v01;
> > -
> > return 0;
> > }
>
> This will have to change around when disentangling the legacy vs v0.1
> stuff.
--
Regards,
Atish