Add an option to cause fewer cores to a context domain. A value of zero is
allowed to for a single context domain.
The boot command line parameter name is "cores_to_context_domain".
Signed-off-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Signed-off-by: Bob Picco <bob.picco@xxxxxxxxxx>
---
arch/sparc/mm/init_64.c | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 8c61fbc..9ada3c8 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2302,6 +2302,23 @@ static unsigned short cpu_to_context_domain_id(int cpu)
return cpu / strands_to_context_domain;
}
+static int __init core_to_cd_early(char *p)
+{
+ unsigned short result;
+
+ if (kstrtou16(p, 10, &result) < 0) {
+ pr_err("Invalid core to context domain value.\n");
+ return 0;
+ }
+
+ cores_to_context_domain = result;
+ pr_info("Using core to context domain count of %u.\n",
+ cores_to_context_domain);
+ return 0;
+}
+
+early_param("cores_to_context_domain", core_to_cd_early);
+
static void __init context_domains_init(void)
{
phys_addr_t cda_size;
--
1.7.1
--
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