From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 758E819E971; Sat, 12 Oct 2024 11:29:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728732549; cv=none; b=J1tDEuI76tZ0tcubL4SA1eSvNVVXJLhVJ4f7+MFHsSxS5s6jmJG5xeSaW2ijQpPEflfePu5L3/BGLLG+u56PkcuMxWZ0APLz6nGuNyAEgy6tkgYHiddJS6Kt/cD2cvMn6/LZBRTrKP7AnQVXYQIlp/UOLbZ498LaLyUOHZmiRNM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728732549; c=relaxed/simple; bh=Cdn4LqeJyN/GJnKIRmhMe/SqbV1+ihUQZDrb4xuyVP0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aIqiqz+tPni+4djpQ5jXXMlDfFIxbis7x6Z5vucz4VlzWM/SdW6ctEDkQY3s2DeJfKfr11Ef+vxfFRmLPZIgXpDZvdMNTO8D64RRWmYdfUro4fHCz1KAlYvRwVp3R7jql69bT0wf9Fy78cQFbDX7pqXvAYKbCQ/Spjhr6LnGiGs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WoJU+yRU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WoJU+yRU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B6F70C4CEC7; Sat, 12 Oct 2024 11:29:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728732549; bh=Cdn4LqeJyN/GJnKIRmhMe/SqbV1+ihUQZDrb4xuyVP0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WoJU+yRUNaxzHfGtQThZeXOZiyKfu43M1l3n9E6m8JOt2bNISLCEqV3B4BK4HHQ+k o3i5c6PL0V9EjlSaqB6qOUzQc6huPrZVVtnQfnCyYetVaqLYlvMrv/eLMTc3ttCS4V 0L86ZPTZDMicRWe9+8y8g0/JIfmmJE61GUQtd08Fu9q2eaa1y+TodTK/NMLqruIEA6 bStK3kGc78D8NZ0ddxc7VFZkAspo0LdusYbf1F2Z2pJjsGIa5mHpjYfgYGp9HjukCB TWmv2+qdgNdqQrPcwtyciAcMe/vibnHuzvZmD6WXy/7O80hhavEhezPt6kqJaDbip8 I+M3tCDTSIGeQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Christophe Leroy , Michael Ellerman , Sasha Levin , hbathini@linux.ibm.com, akpm@linux-foundation.org, bhe@redhat.com, arnd@arndb.de, thorsten.blum@toblux.com, rppt@kernel.org, kent.overstreet@linux.dev, tzimmermann@suse.de, linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 5.15 5/9] powerpc/mm: Fix boot warning with hugepages and CONFIG_DEBUG_VIRTUAL Date: Sat, 12 Oct 2024 07:28:43 -0400 Message-ID: <20241012112855.1764028-5-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241012112855.1764028-1-sashal@kernel.org> References: <20241012112855.1764028-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.167 Content-Transfer-Encoding: 8bit From: Christophe Leroy [ Upstream commit e7e846dc6c73fbc94ae8b4ec20d05627646416f2 ] Booting with CONFIG_DEBUG_VIRTUAL leads to following warning when passing hugepage reservation on command line: Kernel command line: hugepagesz=1g hugepages=1 hugepagesz=64m hugepages=1 hugepagesz=256m hugepages=1 noreboot HugeTLB: allocating 1 of page size 1.00 GiB failed. Only allocated 0 hugepages. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at arch/powerpc/include/asm/io.h:948 __alloc_bootmem_huge_page+0xd4/0x284 Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 6.10.0-rc6-00396-g6b0e82791bd0-dirty #936 Hardware name: MPC8544DS e500v2 0x80210030 MPC8544 DS NIP: c1020240 LR: c10201d0 CTR: 00000000 REGS: c13fdd30 TRAP: 0700 Not tainted (6.10.0-rc6-00396-g6b0e82791bd0-dirty) MSR: 00021000 CR: 44084288 XER: 20000000 GPR00: c10201d0 c13fde20 c130b560 e8000000 e8001000 00000000 00000000 c1420000 GPR08: 00000000 00028001 00000000 00000004 44084282 01066ac0 c0eb7c9c efffe149 GPR16: c0fc4228 0000005f ffffffff c0eb7d0c c0eb7cc0 c0eb7ce0 ffffffff 00000000 GPR24: c1441cec efffe153 e8001000 c14240c0 00000000 c1441d64 00000000 e8000000 NIP [c1020240] __alloc_bootmem_huge_page+0xd4/0x284 LR [c10201d0] __alloc_bootmem_huge_page+0x64/0x284 Call Trace: [c13fde20] [c10201d0] __alloc_bootmem_huge_page+0x64/0x284 (unreliable) [c13fde50] [c10207b8] hugetlb_hstate_alloc_pages+0x8c/0x3e8 [c13fdeb0] [c1021384] hugepages_setup+0x240/0x2cc [c13fdef0] [c1000574] unknown_bootoption+0xfc/0x280 [c13fdf30] [c0078904] parse_args+0x200/0x4c4 [c13fdfa0] [c1000d9c] start_kernel+0x238/0x7d0 [c13fdff0] [c0000434] set_ivor+0x12c/0x168 Code: 554aa33e 7c042840 3ce0c142 80a7427c 5109a016 50caa016 7c9a2378 7fdcf378 4180000c 7c052040 41810160 7c095040 <0fe00000> 38c00000 40800108 3c60c0eb ---[ end trace 0000000000000000 ]--- This is due to virt_addr_valid() using high_memory before it is set. high_memory is set in mem_init() using max_low_pfn, but max_low_pfn is available long before, it is set in mem_topology_setup(). So just like commit daa9ada2093e ("powerpc/mm: Fix boot crash with FLATMEM") moved the setting of max_mapnr immediately after the call to mem_topology_setup(), the same can be done for high_memory. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://msgid.link/62b69c4baad067093f39e7e60df0fe27a86b8d2a.1723100702.git.christophe.leroy@csgroup.eu Signed-off-by: Sasha Levin --- arch/powerpc/kernel/setup-common.c | 1 + arch/powerpc/mm/mem.c | 2 -- 2 files changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index 42338e2921d64..6192088159a91 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -889,6 +889,7 @@ void __init setup_arch(char **cmdline_p) mem_topology_setup(); /* Set max_mapnr before paging_init() */ set_max_mapnr(max_pfn); + high_memory = (void *)__va(max_low_pfn * PAGE_SIZE); /* * Release secondary cpus out of their spinloops at 0x60 now that diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 01fc77564cac1..b26c0fa776de0 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -287,8 +287,6 @@ void __init mem_init(void) swiotlb_init(0); #endif - high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); - kasan_late_init(); memblock_free_all(); -- 2.43.0