On Fri, Mar 10, 2017 at 03:58:08AM -0600, Jiandi An wrote:
> Add a TPM Command Response Buffer start method that invokes
> a secure Monitor Call to request the firmware to execute or
> cancel a TPM 2.0 command for ARM64.
>
> Signed-off-by: Jiandi An <anjia...@codeaurora.org>
> ---
These are placed incorrectly. They should be in tpm_crb.c
/Jarkko
> drivers/char/tpm/tpm.h | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> index 4937b56..4341594 100644
> --- a/drivers/char/tpm/tpm.h
> +++ b/drivers/char/tpm/tpm.h
> @@ -35,6 +35,9 @@
> #include <linux/cdev.h>
> #include <linux/highmem.h>
> #include <crypto/hash_info.h>
> +#ifdef CONFIG_ARM64
> +#include <linux/arm-smccc.h>
> +#endif
>
> enum tpm_const {
> TPM_MINOR = 224, /* officially assigned */
> @@ -484,6 +487,32 @@ static inline void tpm_buf_append_u32(struct tpm_buf
> *buf, const u32 value)
> tpm_buf_append(buf, (u8 *) &value2, 4);
> }
>
> +#ifdef CONFIG_ARM64
> +/*
> + * This is a TPM Command Response Buffer start method that invokes a
> + * Secure Monitor Call to requrest the firmware to execute or cancel
> + * a TPM 2.0 command.
> + */
> +static inline int tpm_crb_smc_start(unsigned long func_id)
> +{
> + struct arm_smccc_res res;
> +
> + arm_smccc_smc(func_id, 0, 0, 0, 0, 0, 0, 0, &res);
> + if (res.a0 != 0) {
> + WARN(1, "tpm_crb_smc_start() returns res.a0 = 0x%lx\n", res.a0);
> + return -EIO;
> + }
> +
> + return 0;
> +}
> +#else
> +static inline int tpm_crb_smc_start(unsigned long func_id)
> +{
> + WARN(1, "tpm_crb: incorrect start method\n");
> + return -EINVAL;
> +}
> +#endif
> +
> extern struct class *tpm_class;
> extern dev_t tpm_devt;
> extern const struct file_operations tpm_fops;
> --
> Jiandi An
> Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm
> Technologies, Inc.
> Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux
> Foundation Collaborative Project.
>
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