lkml.org 
[lkml]   [2018]   [Sep]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2] RISC-V: Show CPU ID and Hart ID separately in /proc/cpuinfo
Date
Currently, /proc/cpuinfo show logical CPU ID as Hart ID which
is in-correct. This patch shows CPU ID and Hart ID separately
in /proc/cpuinfo using cpuid_to_hardid_map().

With this patch, contents of /proc/cpuinfo looks as follows:
processor : 0
hart : 1
isa : rv64imafdc
mmu : sv48

processor : 1
hart : 0
isa : rv64imafdc
mmu : sv48

processor : 2
hart : 2
isa : rv64imafdc
mmu : sv48

processor : 3
hart : 3
isa : rv64imafdc
mmu : sv48

Signed-off-by: Anup Patel <anup@brainfault.org>
---

Changes since v1:
- Show logical CPU ID as "processor" attribute in /proc/cpuinfo

arch/riscv/kernel/cpu.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
index 36b6ddb19b4d..392c7c19c4a3 100644
--- a/arch/riscv/kernel/cpu.c
+++ b/arch/riscv/kernel/cpu.c
@@ -81,7 +81,7 @@ static void print_isa(struct seq_file *f, const char *orig_isa)
#endif

/* Print the base ISA, as we already know it's legal. */
- seq_puts(f, "isa\t: ");
+ seq_puts(f, "isa\t\t: ");
seq_write(f, isa, 5);
isa += 5;

@@ -96,6 +96,7 @@ static void print_isa(struct seq_file *f, const char *orig_isa)
isa++;
}
}
+ seq_puts(f, "\n");

/*
* If we were given an unsupported ISA in the device tree then print
@@ -116,7 +117,7 @@ static void print_mmu(struct seq_file *f, const char *mmu_type)
return;
#endif

- seq_printf(f, "mmu\t: %s\n", mmu_type+6);
+ seq_printf(f, "mmu\t\t: %s\n", mmu_type+6);
}

static void *c_start(struct seq_file *m, loff_t *pos)
@@ -144,14 +145,15 @@ static int c_show(struct seq_file *m, void *v)
NULL);
const char *compat, *isa, *mmu;

- seq_printf(m, "hart\t: %lu\n", cpu_id);
+ seq_printf(m, "processor\t: %lu\n", cpu_id);
+ seq_printf(m, "hart\t\t: %lu\n", cpuid_to_hardid_map(cpu_id));
if (!of_property_read_string(node, "riscv,isa", &isa))
print_isa(m, isa);
if (!of_property_read_string(node, "mmu-type", &mmu))
print_mmu(m, mmu);
if (!of_property_read_string(node, "compatible", &compat)
&& strcmp(compat, "riscv"))
- seq_printf(m, "uarch\t: %s\n", compat);
+ seq_printf(m, "uarch\t\t: %s\n", compat);
seq_puts(m, "\n");

return 0;
--
2.17.1
\
 
 \ /
  Last update: 2018-09-23 15:38    [W:0.077 / U:2.476 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site