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lszcrypt/chzcrypt: Warn if default domain is unavailable

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Improvements for lszcrypt and chzcrypt:
* lszcrypt -b and lszcrypt -d now check for default domain
  available and gives a warning if the current default domain
  is not in the usage_domain_mask of the AP bus.
* lszcrypt without any further device also checks for the
  default domain and emits a warning string if the default
  domain is not available.
* chzcrypt --default-domain emits a warning if the newly
  set default domain is not enabled in the usage_domain_mask
  of the AP bus.

Suggested-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Harald Freudenberger
2026-02-27 18:08:46 +01:00
committed by Jan Höppner
parent daad3bf0e7
commit d0046257b6
4 changed files with 90 additions and 18 deletions
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zconf/zcrypt/misc.c
+28
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@@ -71,3 +71,31 @@ bool ap_bus_has_SB_support(void)
return sb_support > 0 ? true : false;
}
/*
* Helper function: for a given hex string return the bit value.
* Bit count starts on the left with 0.
* Returns 0 or 1 or -1 on failure.
*/
int check_mask_bit(const char *mask, int bit)
{
int b;
if (mask && mask[0] == '0' && mask[1] == 'x')
mask += 2;
while (*mask && bit >= 4) {
mask++;
bit -= 4;
}
if (*mask >= '0' && *mask <= '9')
b = *mask - '0';
else if (*mask >= 'a' && *mask <= 'f')
b = *mask + 10 - 'a';
else if (*mask >= 'A' && *mask <= 'F')
b = *mask + 10 - 'A';
else
return -1;
return b & (0x08 >> bit) ? 1 : 0;
}