On Wed, Nov 01, 2017 at 04:15:59PM -0500, Brijesh Singh wrote:
> The SEV_FACTORY_RESET command can be used by the platform owner to
> reset the non-volatile SEV related data. The command is defined in
> SEV spec section 5.4
>
> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> Cc: "Radim Krčmář" <rkrcmar@xxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxx>
> Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> Cc: Gary Hook <gary.hook@xxxxxxx>
> Cc: Tom Lendacky <thomas.lendacky@xxxxxxx>
> Cc: linux-crypto@xxxxxxxxxxxxxxx
> Cc: kvm@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Improvements-by: Borislav Petkov <bp@xxxxxxx>
> Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx>
> Acked-by: Gary R Hook <gary.hook@xxxxxxx>
Acked-by: needs to go away too if you send a new revision with
non-trivial changes. Same as with Reviewed-by: tags.
> ---
> drivers/crypto/ccp/psp-dev.c | 70 +++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 69 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
> index c61ca16096ca..a757bd1c34e8 100644
> --- a/drivers/crypto/ccp/psp-dev.c
> +++ b/drivers/crypto/ccp/psp-dev.c
> @@ -235,9 +235,77 @@ static int sev_platform_shutdown(int *error)
> return rc;
> }
>
> +static int sev_platform_state(int *state, int *error)
It needs a verb in the name: sev_get_platform_state()
> +{
> + int rc;
> +
> + rc = __sev_do_cmd_locked(SEV_CMD_PLATFORM_STATUS,
> + psp_master->sev_status, error);
> + if (rc)
> + return rc;
> +
> + *state = psp_master->sev_status->state;
> + return rc;
> +}
> +
> +static int sev_ioctl_do_reset(struct sev_issue_cmd *argp)
> +{
> + int state, rc;
> +
> + rc = sev_platform_state(&state, &argp->error);
> + if (rc)
> + return rc;
> +
> + if (state == SEV_STATE_WORKING) {
You could write a short blurb somewhere in a comment around here, what
the logic now is going to be for the SEV device: If in working state,
reset is denied. All other states accept it, because... <reasons>.
> + argp->error = SEV_RET_INVALID_PLATFORM_STATE;
If you're going to write enum psp_ret_code types into argp->error, then
it needs to be of enum psp_ret_code type and not an int.
> + return -EBUSY;
> + }
> +
> + if (state == SEV_STATE_INIT) {
> + rc = __sev_platform_shutdown_locked(&argp->error);
> + if (rc)
> + return rc;
> + }
> +
> + return __sev_do_cmd_locked(SEV_CMD_FACTORY_RESET, 0, &argp->error);
> +}
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
