diff mbox series

[04/12] arm64: Use of_get_cpu_hwid()

Message ID 20211006164332.1981454-5-robh@kernel.org
State Accepted
Commit 4d97b9290ed33db59620e287c3aa1ce36ba593aa
Headers show
Series DT: CPU h/w id parsing clean-ups and cacheinfo id support | expand

Commit Message

Rob Herring (Arm) Oct. 6, 2021, 4:43 p.m. UTC 
Replace the open coded parsing of CPU nodes' 'reg' property with
of_get_cpu_hwid().

This change drops an error message for missing 'reg' property, but that
should not be necessary as the DT tools will ensure 'reg' is present.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>

---
 arch/arm64/kernel/smp.c | 31 ++-----------------------------
 1 file changed, 2 insertions(+), 29 deletions(-)

-- 
2.30.2

Comments

Will Deacon Oct. 7, 2021, 8:07 a.m. UTC | #1 
On Wed, Oct 06, 2021 at 11:43:24AM -0500, Rob Herring wrote:
> Replace the open coded parsing of CPU nodes' 'reg' property with

> of_get_cpu_hwid().

> 

> This change drops an error message for missing 'reg' property, but that

> should not be necessary as the DT tools will ensure 'reg' is present.

> 

> Cc: Catalin Marinas <catalin.marinas@arm.com>

> Cc: Will Deacon <will@kernel.org>

> Signed-off-by: Rob Herring <robh@kernel.org>

> ---

>  arch/arm64/kernel/smp.c | 31 ++-----------------------------

>  1 file changed, 2 insertions(+), 29 deletions(-)


Acked-by: Will Deacon <will@kernel.org>


It's a shame INVALID_HWID can't be removed too, but looks like it's still
used in a couple of places.

Will
diff mbox series

Patch

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 6f6ff072acbd..c5cebc406d24 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -466,33 +466,6 @@  void __init smp_prepare_boot_cpu(void)
 	kasan_init_hw_tags();
 }
 
-static u64 __init of_get_cpu_mpidr(struct device_node *dn)
-{
-	const __be32 *cell;
-	u64 hwid;
-
-	/*
-	 * A cpu node with missing "reg" property is
-	 * considered invalid to build a cpu_logical_map
-	 * entry.
-	 */
-	cell = of_get_property(dn, "reg", NULL);
-	if (!cell) {
-		pr_err("%pOF: missing reg property\n", dn);
-		return INVALID_HWID;
-	}
-
-	hwid = of_read_number(cell, of_n_addr_cells(dn));
-	/*
-	 * Non affinity bits must be set to 0 in the DT
-	 */
-	if (hwid & ~MPIDR_HWID_BITMASK) {
-		pr_err("%pOF: invalid reg property\n", dn);
-		return INVALID_HWID;
-	}
-	return hwid;
-}
-
 /*
  * Duplicate MPIDRs are a recipe for disaster. Scan all initialized
  * entries and check for duplicates. If any is found just ignore the
@@ -656,9 +629,9 @@  static void __init of_parse_and_init_cpus(void)
 	struct device_node *dn;
 
 	for_each_of_cpu_node(dn) {
-		u64 hwid = of_get_cpu_mpidr(dn);
+		u64 hwid = of_get_cpu_hwid(dn, 0);
 
-		if (hwid == INVALID_HWID)
+		if (hwid & ~MPIDR_HWID_BITMASK)
 			goto next;
 
 		if (is_mpidr_duplicate(cpu_count, hwid)) {