diff '--color=auto' -ur jemalloc-5.3.1.orig/include/jemalloc/internal/hpa.h jemalloc-5.3.1/include/jemalloc/internal/hpa.h
--- jemalloc-5.3.1.orig/include/jemalloc/internal/hpa.h	2026-04-14 02:12:37.000000000 +0200
+++ jemalloc-5.3.1/include/jemalloc/internal/hpa.h	2026-04-15 04:23:07.235565603 +0200
@@ -14,6 +14,33 @@
 #include "jemalloc/internal/psset.h"
 #include "jemalloc/internal/sec.h"
 
+/*
+ * The HPA_SUPPORTED macro is not a technical indicator of whether HPA
+ * theoretically functions on the platform, but rather whether the platform is
+ * tested/supported for using HPA on by the jemalloc developers.
+ */
+#ifdef HPA_SUPPORTED
+#warning "Force-enabling HPA support. Do NOT report issues to jemalloc developers."
+#else
+#define HPA_SUPPORTED 1
+
+/*
+ * At least until the API and implementation is somewhat settled, we
+ * don't want to try to debug the VM subsystem on the hardest-to-test
+ * platform.
+ */
+#ifdef _WIN32
+#undef HPA_SUPPORTED
+#endif
+
+/*
+ * https://github.com/jemalloc/jemalloc/issues/2305#issuecomment-1195917164
+ */
+#if !defined(__x86_64__) && !defined(__i386__)
+#undef HPA_SUPPORTED
+#endif
+#endif
+
 typedef struct hpa_shard_nonderived_stats_s hpa_shard_nonderived_stats_t;
 struct hpa_shard_nonderived_stats_s {
 	/*
diff '--color=auto' -ur jemalloc-5.3.1.orig/src/hpa.c jemalloc-5.3.1/src/hpa.c
--- jemalloc-5.3.1.orig/src/hpa.c	2026-04-14 02:12:37.000000000 +0200
+++ jemalloc-5.3.1/src/hpa.c	2026-04-15 04:23:55.490383303 +0200
@@ -34,12 +34,7 @@
 
 bool
 hpa_supported(void) {
-#ifdef _WIN32
-	/*
-	 * At least until the API and implementation is somewhat settled, we
-	 * don't want to try to debug the VM subsystem on the hardest-to-test
-	 * platform.
-	 */
+#ifndef HPA_SUPPORTED
 	return false;
 #endif
 	if (!pages_can_hugify) {
diff '--color=auto' -ur jemalloc-5.3.1.orig/test/include/test/test.h jemalloc-5.3.1/test/include/test/test.h
--- jemalloc-5.3.1.orig/test/include/test/test.h	2026-04-14 02:12:37.000000000 +0200
+++ jemalloc-5.3.1/test/include/test/test.h	2026-04-15 04:25:35.425005764 +0200
@@ -525,6 +525,15 @@
 			goto label_test_end;                                   \
 		}
 
+#define TEST_SKIP(f)							\
+static void									\
+f(void) {									\
+	p_test_init(#f);						\
+	test_skip("%s:%s:%d: Test skipped: ",	\
+		__func__, __FILE__, __LINE__);		\
+	p_test_fini();							\
+}
+
 #define TEST_END                                                               \
 	goto label_test_end;                                                   \
 	label_test_end:                                                        \
diff '--color=auto' -ur jemalloc-5.3.1.orig/test/unit/psset.c jemalloc-5.3.1/test/unit/psset.c
--- jemalloc-5.3.1.orig/test/unit/psset.c	2026-04-14 02:12:37.000000000 +0200
+++ jemalloc-5.3.1/test/unit/psset.c	2026-04-15 04:30:17.991938266 +0200
@@ -309,6 +309,7 @@
 }
 TEST_END
 
+#ifdef HPA_SUPPORTED
 TEST_BEGIN(test_multi_pageslab) {
 	test_skip_if(hpa_hugepage_size_exceeds_limit());
 	bool      err;
@@ -378,6 +379,9 @@
 	free(alloc[1]);
 }
 TEST_END
+#else
+TEST_SKIP(test_multi_pageslab)
+#endif
 
 TEST_BEGIN(test_stats_merged) {
 	hpdata_t pageslab;
@@ -624,6 +628,7 @@
  * (There's nothing magic about these numbers; it's just useful to share the
  * setup between the oldest fit and the insert/remove test).
  */
+#ifdef HPA_SUPPORTED
 static void
 init_test_pageslabs(psset_t *psset, hpdata_t *pageslab,
     hpdata_t *worse_pageslab, edata_t *alloc, edata_t *worse_alloc) {
@@ -671,7 +676,9 @@
 	    psset, &alloc[HUGEPAGE_PAGES - 1]);
 	expect_ptr_null(evicted, "Unexpected eviction");
 }
+#endif
 
+#ifdef HPA_SUPPORTED
 TEST_BEGIN(test_oldest_fit) {
 	test_skip_if(hpa_hugepage_size_exceeds_limit());
 	bool     err;
@@ -699,7 +706,11 @@
 	free(worse_alloc);
 }
 TEST_END
+#else
+TEST_SKIP(test_oldest_fit)
+#endif
 
+#ifdef HPA_SUPPORTED
 TEST_BEGIN(test_insert_remove) {
 	test_skip_if(hpa_hugepage_size_exceeds_limit());
 	bool      err;
@@ -750,6 +761,9 @@
 	free(worse_alloc);
 }
 TEST_END
+#else
+TEST_SKIP(test_insert_remove)
+#endif
 
 TEST_BEGIN(test_purge_prefers_nonhuge) {
 	test_skip_if(hpa_hugepage_size_exceeds_limit());