Commit 79a21dbf authored by Prarit Bhargava's avatar Prarit Bhargava Committed by Rafael J. Wysocki

powercap / RAPL: fix BIOS lock check

Intel RAPL initialized on several systems where the BIOS lock bit (msr
0x610, bit 63) was set.  This occured because the return value of
rapl_read_data_raw() was being checked, rather than the value of the variable
passed in, locked.

This patch properly implments the rapl_read_data_raw() call to check the
variable locked, and now the Intel RAPL driver outputs the warning:

	intel_rapl: RAPL package 0 domain package locked by BIOS

and does not initialize for the package.
Signed-off-by: 's avatarPrarit Bhargava <>
Acked-by: 's avatarJacob Pan <>
Cc: All applicable <>
Signed-off-by: 's avatarRafael J. Wysocki <>
parent 89e7b255
......@@ -1341,10 +1341,13 @@ static int rapl_detect_domains(struct rapl_package *rp, int cpu)
for (rd = rp->domains; rd < rp->domains + rp->nr_domains; rd++) {
/* check if the domain is locked by BIOS */
if (rapl_read_data_raw(rd, FW_LOCK, false, &locked)) {
ret = rapl_read_data_raw(rd, FW_LOCK, false, &locked);
if (ret)
return ret;
if (locked) {
pr_info("RAPL package %d domain %s locked by BIOS\n",
rp->id, rd->name);
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