On Thursday 19 October 2017 12:50:14 Mario Limonciello wrote:
> +/* When enabled this indicates that SMM won't work */
> +static bool test_wsmt_enabled(void)
> +{
> + struct calling_interface_token *token;
> +
> + /* if token doesn't exist, SMM will work */
> + token = dell_smbios_find_token(WSMT_EN_TOKEN);
> + if (!token)
> + return false;
> +
> + /* if token exists, try to access over SMM */
> + buffer->class = CLASS_TOKEN_READ;
> + buffer->select = SELECT_TOKEN_STD;
> + memset(buffer, 0, sizeof(struct calling_interface_buffer));
> + buffer->input[0] = token->location;
> + dell_smbios_smm_call(buffer);
> +
> + /* if lookup failed, we know WSMT was enabled */
> + if (buffer->output[0] != 0)
> + return true;
> +
> + /* query token status if it didn't fail */
> + return (buffer->output[1] == token->value);
> +}
> +
> static int __init dell_smbios_smm_init(void)
> {
> int ret;
> @@ -115,6 +140,13 @@ static int __init dell_smbios_smm_init(void)
>
> dmi_walk(find_cmd_address, NULL);
>
> + ret = test_wsmt_enabled();
ret is int, but test_wsmt_enabled() returns bool.
--
Pali Rohár
pali.rohar@xxxxxxxxx
