[Bug 219495] [TPM2] tpm_tis driver crashs during the boot time.

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219495

--- Comment #35 from jarkko@kernel.org ---
Copy-pasting what I wrote to the header of tpm_read_log_acpi() should clear up
a bit what I'm aiming for:

/*
 * Find out the physical address range for the event log from TCPA and TPM2
 * ACPI tables. If successful, sets TPM_CHIP_FLAG_EVENTLOG_ACPI. Also,
 * chip->bios_event_log and chip->bios_event_log_end will end up containing
 * physical address range, rather than virtual. This range must be mapped
 * with acpi_os_map_iomem().
 */

int tpm_read_log_acpi(struct tpm_chip *chip)
{
        u8 event[sizeof(struct tcg_pcr_event) + sizeof(struct
tcg_efi_specid_event_head)];
        struct tcg_pcr_event *event_header = (struct tcg_pcr_event *)event;
        struct tcg_efi_specid_event_head *efispecid =

Then just tweak the code paths in eventlog/tpm2.c and that should fix this up.
I read a fixed-size buffer just to open code tpm_is_tpm2_log() to the function
and that way also the pre-existing code is still needed, just without the
allocation part.

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