Le 14/06/21 à 22:40, Jarkko Sakkinen a écrit :
On Thu, Jun 10, 2021 at 04:00:27PM +0200, Laurent Bigonville wrote:
Le 10/06/21 à 14:29, Jarkko Sakkinen a écrit :
On Thu, Jun 10, 2021 at 01:35:47PM +0200, Laurent Bigonville wrote:
# dmesg |grep -i tpm
[ 13.019986] tpm_tis 00:06: 1.2 TPM (device-id 0x6871, rev-id 1)
[ 15.016198] tpm tpm0: tpm_try_transmit: send(): error -62
[ 15.016208] tpm tpm0: A TPM error (-62) occurred attempting to determine
the timeouts
[ 15.016239] tpm_tis: probe of 00:06 failed with error -62
[ 15.053255] tpm_inf_pnp 00:06: Found TPM with ID IFX0102
If possible, can you check what happens when you apply the attached patch.
I'm not proposing it as a bug fix but it just simplifies the flow a lot,
and might help to observe something.
With the patch on the top of HEAD of master and the patch from your branch,
I'm getting this:
[ 13.140548] tpm tpm0: invalid TPM_STS.x 0xa0, dumping stack for forensics
[ 13.140617] CPU: 4 PID: 462 Comm: systemd-udevd Tainted: G I
E 5.13.0-rc5+ #7
[ 13.140621] Hardware name: System manufacturer System Product Name/P6T
DELUXE V2, BIOS 0406 04/24/2009
[ 13.140623] Call Trace:
[ 13.140628] dump_stack+0x76/0x94
[ 13.140637] tpm_tis_status.cold+0x19/0x20 [tpm_tis_core]
[ 13.140643] tpm_transmit+0x15f/0x3d0 [tpm]
[ 13.140657] tpm_transmit_cmd+0x25/0x90 [tpm]
[ 13.140666] tpm2_probe+0xe2/0x140 [tpm]
It's weird because it's the first transaction with the TPM, not likely
to have any sort of mismatch in power gating.
I'm suspecting this:
if (wait_startup(chip, 0) != 0) {
rc = -ENODEV;
goto out_err;
}
I did not find anything from [*] stating that reading Access Register,
could cause any change in the burstCount (0xa0) but still might be worth
of testing to couple that with
release_locality(chip, 0);
I.e. add that just after the first snippet.
You mean this, right?
diff --git a/drivers/char/tpm/tpm_tis_core.c
b/drivers/char/tpm/tpm_tis_core.c
index 3b5a03f9efce..857ea790e9d3 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -969,6 +969,7 @@ int tpm_tis_core_init(struct device *dev, struct
tpm_tis_data *priv, int irq,
rc = -ENODEV;
goto out_err;
}
+ release_locality(chip, 0);
/* Take control of the TPM's interrupt hardware and shut it off */
rc = tpm_tis_read32(priv, TPM_INT_ENABLE(priv->locality),
&intmask);
With this change (and with or without "tpm_tis: Use request_locality()
before calling tpm2_probe()"), I get the following:
[ 13.420485] tpm tpm0: invalid TPM_STS.x 0xff, dumping stack for forensics
[ 13.420494] CPU: 5 PID: 461 Comm: systemd-udevd Tainted: G I
E 5.13.0-rc6+ #8
[ 13.420498] Hardware name: System manufacturer System Product
Name/P6T DELUXE V2, BIOS 0406 04/24/2009
[ 13.420500] Call Trace:
[ 13.420505] dump_stack+0x76/0x94
[ 13.420512] tpm_tis_status.cold+0x19/0x20 [tpm_tis_core]
[ 13.420519] wait_for_tpm_stat+0x49/0x200 [tpm_tis_core]
[ 13.420524] ? get_page_from_freelist+0x228/0xed0
[ 13.420530] ? tpm_tcg_read_bytes+0x30/0x50 [tpm_tis]
[ 13.420536] tpm_tis_send_data+0x90/0x250 [tpm_tis_core]
[ 13.420542] tpm_tis_send_main+0x2e/0xf0 [tpm_tis_core]
[ 13.420547] tpm_transmit+0xd8/0x3d0 [tpm]
[ 13.420559] tpm_transmit_cmd+0x25/0x90 [tpm]
[ 13.420567] tpm2_probe+0xe2/0x140 [tpm]
[ 13.420577] tpm_tis_core_init+0x1fd/0x2e0 [tpm_tis_core]
[ 13.420582] ? tpm_tis_init.part.0+0x130/0x130 [tpm_tis]
[ 13.420587] tpm_tis_pnp_init+0xe1/0x110 [tpm_tis]
[ 13.420594] pnp_device_probe+0xaf/0x140
[ 13.420600] really_probe+0xf2/0x460
[ 13.420606] driver_probe_device+0xe8/0x160
[ 13.420610] device_driver_attach+0xa1/0xb0
[ 13.420614] __driver_attach+0x8f/0x150
[ 13.420618] ? device_driver_attach+0xb0/0xb0
[ 13.420621] ? device_driver_attach+0xb0/0xb0
[ 13.420624] bus_for_each_dev+0x78/0xc0
[ 13.420628] bus_add_driver+0x12b/0x1e0
[ 13.420632] driver_register+0x8b/0xe0
[ 13.420636] ? 0xffffffffc1413000
[ 13.420639] init_tis+0xa0/0x1000 [tpm_tis]
[ 13.420646] do_one_initcall+0x44/0x1d0
[ 13.420652] ? kmem_cache_alloc_trace+0x119/0x240
[ 13.420657] do_init_module+0x5c/0x260
[ 13.420662] __do_sys_finit_module+0xb1/0x110
[ 13.420668] do_syscall_64+0x40/0xb0
[ 13.420673] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 13.420678] RIP: 0033:0x7f15fe84e9b9
[ 13.420681] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00
48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f
05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a7 54 0c 00 f7 d8 64 89 01 48
[ 13.420685] RSP: 002b:00007fffc3aca668 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[ 13.420689] RAX: ffffffffffffffda RBX: 00005561627275b0 RCX:
00007f15fe84e9b9
[ 13.420692] RDX: 0000000000000000 RSI: 00007f15fe9d9e2d RDI:
0000000000000012
[ 13.420694] RBP: 0000000000020000 R08: 0000000000000000 R09:
0000556161c2f330
[ 13.420696] R10: 0000000000000012 R11: 0000000000000246 R12:
00007f15fe9d9e2d
[ 13.420698] R13: 0000000000000000 R14: 000055616271dab0 R15:
00005561627275b0
[...]
[ 14.185406] tpm tpm0: tpm_try_transmit: send(): error -62
[ 14.185422] tpm_tis 00:06: 1.2 TPM (device-id 0x6871, rev-id 1)
[ 15.021233] tpm tpm0: tpm_try_transmit: send(): error -62
[ 24.381575] tpm tpm0: tpm_try_transmit: send(): error -62
[...]
But now the /dev/tpm0 device appears (but doesn't seem to work)
