[PATCH] arm64: patching: avoid early page_to_phys()

[Catalin Marinas]

On Mon, 02 Dec 2024 17:03:59 +0000, Mark Rutland wrote:
> When arm64 is configured with CONFIG_DEBUG_VIRTUAL=y, a warning is
> printed from the patching code because patch_map(), e.g.
> 
> | ------------[ cut here ]------------
> | WARNING: CPU: 0 PID: 0 at arch/arm64/kernel/patching.c:45 patch_map.constprop.0+0x120/0xd00
> | CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.13.0-rc1-00002-ge1a5d6c6be55 #1
> | Hardware name: linux,dummy-virt (DT)
> | pstate: 800003c5 (Nzcv DAIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> | pc : patch_map.constprop.0+0x120/0xd00
> | lr : patch_map.constprop.0+0x120/0xd00
> | sp : ffffa9bb312a79a0
> | x29: ffffa9bb312a79a0 x28: 0000000000000001 x27: 0000000000000001
> | x26: 0000000000000000 x25: 0000000000000000 x24: 00000000000402e8
> | x23: ffffa9bb2c94c1c8 x22: ffffa9bb2c94c000 x21: ffffa9bb222e883c
> | x20: 0000000000000002 x19: ffffc1ffc100ba40 x18: ffffa9bb2cf0f21c
> | x17: 0000000000000006 x16: 0000000000000000 x15: 0000000000000004
> | x14: 1ffff5376625b4ac x13: ffff753766a67fb8 x12: ffff753766919cd1
> | x11: 0000000000000003 x10: 1ffff5376625b4c3 x9 : 1ffff5376625b4af
> | x8 : ffff753766254f0a x7 : 0000000041b58ab3 x6 : ffff753766254f18
> | x5 : ffffa9bb312d9bc0 x4 : 0000000000000000 x3 : ffffa9bb29bd90e4
> | x2 : 0000000000000002 x1 : ffffa9bb312d9bc0 x0 : 0000000000000000
> | Call trace:
> |  patch_map.constprop.0+0x120/0xd00 (P)
> |  patch_map.constprop.0+0x120/0xd00 (L)
> |  __aarch64_insn_write+0xa8/0x120
> |  aarch64_insn_patch_text_nosync+0x4c/0xb8
> |  arch_jump_label_transform_queue+0x7c/0x100
> |  jump_label_update+0x154/0x460
> |  static_key_enable_cpuslocked+0x1d8/0x280
> |  static_key_enable+0x2c/0x48
> |  early_randomize_kstack_offset+0x104/0x168
> |  do_early_param+0xe4/0x148
> |  parse_args+0x3a4/0x838
> |  parse_early_options+0x50/0x68
> |  parse_early_param+0x58/0xe0
> |  setup_arch+0x78/0x1f0
> |  start_kernel+0xa0/0x530
> |  __primary_switched+0x8c/0xa0
> | irq event stamp: 0
> | hardirqs last  enabled at (0): [<0000000000000000>] 0x0
> | hardirqs last disabled at (0): [<0000000000000000>] 0x0
> | softirqs last  enabled at (0): [<0000000000000000>] 0x0
> | softirqs last disabled at (0): [<0000000000000000>] 0x0
> | ---[ end trace 0000000000000000 ]---
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/1] arm64: patching: avoid early page_to_phys()
      https://git.kernel.org/arm64/c/8d09e2d569f6

-- 
Catalin