arm64: dts: qcom: sm8250: add cache size

Add full cache description to DTS to avoid:
1. "Early cacheinfo failed" warnings,
2. Cache topology detection which leads to early memory allocations and
   "BUG: sleeping function called from invalid context" on PREEMPT_RT
   kernel:

  smp: Bringing up secondary CPUs ...
  Detected VIPT I-cache on CPU1
  BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:46
  in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 0, name: swapper/1
  preempt_count: 1, expected: 0
  RCU nest depth: 1, expected: 1
  3 locks held by swapper/1/0:
   #0: ffff5e337eee5f18 (&pcp->lock){+.+.}-{3:3}, at: get_page_from_freelist+0x20c/0xffc
   #1: ffffa9e24a900b18 (rcu_read_lock){....}-{1:3}, at: rt_spin_trylock+0x40/0xe4
   #2: ffff5e337efc8918 (&zone->lock){+.+.}-{3:3}, at: rmqueue_bulk+0x54/0x720
  irq event stamp: 0
  Call trace:
   __might_resched+0x17c/0x214
   rt_spin_lock+0x5c/0x100
   rmqueue_bulk+0x54/0x720
   get_page_from_freelist+0xcfc/0xffc
   __alloc_pages+0xec/0x1150
   alloc_page_interleave+0x1c/0xd0
   alloc_pages+0xec/0x160
   new_slab+0x330/0x454
   ___slab_alloc+0x5b8/0xba0
   __kmem_cache_alloc_node+0xf4/0x20c
   __kmalloc+0x60/0x100
   detect_cache_attributes+0x2a8/0x5a0
   update_siblings_masks+0x28/0x300
   store_cpu_topology+0x58/0x70
   secondary_start_kernel+0xc8/0x154

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221229132731.1193713-1-krzysztof.kozlowski@linaro.org

diff --git a/arch/arm64/boot/dts/qcom/sm8250.dtsi b/arch/arm64/boot/dts/qcom/sm8250.dtsi
index 2baaa63737053d55ff16142645542425bc87537d..eafe0e841bad0fd37092d34bdf57d111cd445291 100644 (file)
--- a/arch/arm64/boot/dts/qcom/sm8250.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8250.dtsi
@@ -111,10 +111,14 @@
                        L2_0: l2-cache {
                                compatible = "cache";
                                cache-level = <2>;
+                               cache-size = <0x20000>;
+                               cache-unified;
                                next-level-cache = <&L3_0>;
                                L3_0: l3-cache {
                                        compatible = "cache";
                                        cache-level = <3>;
+                                       cache-size = <0x400000>;
+                                       cache-unified;
                                };
                        };
                };
@@ -137,6 +141,8 @@
                        L2_100: l2-cache {
                                compatible = "cache";
                                cache-level = <2>;
+                               cache-size = <0x20000>;
+                               cache-unified;
                                next-level-cache = <&L3_0>;
                        };
                };
@@ -159,6 +165,8 @@
                        L2_200: l2-cache {
                                compatible = "cache";
                                cache-level = <2>;
+                               cache-size = <0x20000>;
+                               cache-unified;
                                next-level-cache = <&L3_0>;
                        };
                };
@@ -181,6 +189,8 @@
                        L2_300: l2-cache {
                                compatible = "cache";
                                cache-level = <2>;
+                               cache-size = <0x20000>;
+                               cache-unified;
                                next-level-cache = <&L3_0>;
                        };
                };
@@ -203,6 +213,8 @@
                        L2_400: l2-cache {
                                compatible = "cache";
                                cache-level = <2>;
+                               cache-size = <0x40000>;
+                               cache-unified;
                                next-level-cache = <&L3_0>;
                        };
                };
@@ -225,6 +237,8 @@
                        L2_500: l2-cache {
                                compatible = "cache";
                                cache-level = <2>;
+                               cache-size = <0x40000>;
+                               cache-unified;
                                next-level-cache = <&L3_0>;
                        };
 
@@ -248,6 +262,8 @@
                        L2_600: l2-cache {
                                compatible = "cache";
                                cache-level = <2>;
+                               cache-size = <0x40000>;
+                               cache-unified;
                                next-level-cache = <&L3_0>;
                        };
                };
@@ -270,6 +286,8 @@
                        L2_700: l2-cache {
                                compatible = "cache";
                                cache-level = <2>;
+                               cache-size = <0x80000>;
+                               cache-unified;
                                next-level-cache = <&L3_0>;
                        };
                };