From b47e18a6599a08619455e8b602af492589a6fb5b Mon Sep 17 00:00:00 2001
From: Steven Moreland <smoreland@google.com>
Date: Fri, 23 Aug 2024 00:10:58 +0000
Subject: [PATCH] Standardize page property.

ro.boot.hardware.cpu.pagesize is used on some devices to
report the page size. However, we also know what value this
should be from the CPU. Rather than create a separate property
for this, standardize around this property.

This also allows us to test the value of this property on all
devices.

Bug: 358696947
Test: Vts16KPageSizeTest
Change-Id: I7f6260c68e17e7df8a789e9066a7171f3a56f4b0
---
 init/property_service.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/init/property_service.cpp b/init/property_service.cpp
index 0d6eb1533..208d76f94 100644
--- a/init/property_service.cpp
+++ b/init/property_service.cpp
@@ -1255,6 +1255,16 @@ void PropertyLoadBootDefaults() {
     update_sys_usb_config();
 }
 
+void PropertyLoadDerivedDefaults() {
+    const char* PAGE_PROP = "ro.boot.hardware.cpu.pagesize";
+    if (GetProperty(PAGE_PROP, "").empty()) {
+        std::string error;
+        if (PropertySetNoSocket(PAGE_PROP, std::to_string(getpagesize()), &error) != PROP_SUCCESS) {
+            LOG(ERROR) << "Could not set '" << PAGE_PROP << "' because: " << error;
+        }
+    }
+}
+
 bool LoadPropertyInfoFromFile(const std::string& filename,
                               std::vector<PropertyInfoEntry>* property_infos) {
     auto file_contents = std::string();
@@ -1425,6 +1435,7 @@ void PropertyInit() {
     ExportKernelBootProps();
 
     PropertyLoadBootDefaults();
+    PropertyLoadDerivedDefaults();
 }
 
 static void HandleInitSocket() {