As Ian Lepore noted, writing ~1 to a register might have a completely
different effect than doing a regular read-modify-write operation.
Follow the TCG_PC_Client_Platform_TPM_Profile_PTP_2.0_r1.03_v22
datasheet instead, and use the actual values mentioned there:
(uint32_t)1 to cancel the command, (uint32_t)0 to clear the field.
MFC after: 3 days
operations to a boolean in tpm(4):
sys/dev/tpm/tpm_crb.c:301:32: error: converting the result of '<<' to a boolean; did you mean '(1 << (0)) != 0'? [-Werror,-Wint-in-bool-context]
WR4(sc, TPM_CRB_CTRL_CANCEL, !TPM_CRB_CTRL_CANCEL_CMD);
^
sys/dev/tpm/tpm_crb.c:73:34: note: expanded from macro 'TPM_CRB_CTRL_CANCEL_CMD'
#define TPM_CRB_CTRL_CANCEL_CMD BIT(0)
^
sys/dev/tpm/tpm20.h:60:19: note: expanded from macro 'BIT'
#define BIT(x) (1 << (x))
^
In this case, the intent was to clear the zeroth bit, and leave the rest
unaffected. Therefore, the ~ operator should be used instead.
Noticed by: cem
MFC after: 3 days
TPM has a built-in RNG, with its own entropy source.
The driver was extended to harvest 16 random bytes from TPM every 10 seconds.
A new build option "TPM_HARVEST" was introduced - for now, however, it
is not enabled by default in the GENERIC config.
Submitted by: Kornel Duleba <mindal@semihalf.com>
Reviewed by: markm, delphij
Approved by: secteam
Obtained from: Semihalf
Sponsored by: Stormshield
Differential Revision: https://reviews.freebsd.org/D19620
On amd64 the RSP address can be read in single 8-byte transaction,
which is obviously not possible on 32-bit platforms. Fix that
by performing 2 4-byte read on them.
Obtained from: Semihalf
Sponsored by: Stormshield
It was written basing on:
TCG PC Client Platform TPM Profile (PTP) Specification Version 22, Revision 1.03.
It only supports Locality 0. Interrupts are only supported in FIFO mode.
The driver in FIFO mode was tested on x86 with Infineon SLB9665 discrete TPM chip.
Driver in both modes was also tested on qemu with swtpm running on host.
Submitted by: Kornel Duleba <mindal@semihalf.com>
Obtained from: Semihalf
Sponsored by: Stormshield
Differential Revision: https://reviews.freebsd.org/D18048
