[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-ppc] [PATCH v2 3/4] ppc/pnv: Fix fatal bug on 32-bit hosts

From: Cédric Le Goater
Subject: [Qemu-ppc] [PATCH v2 3/4] ppc/pnv: Fix fatal bug on 32-bit hosts
Date: Mon, 14 Nov 2016 10:12:57 +0100

From: David Gibson <address@hidden>

If the pnv machine type is compiled on a 32-bit host, the unsigned long
(host) type is 32-bit.  This means that the hweight_long() used to
calculate the number of allowed cores only considers the low 32 bits of
the cores_mask variable, and can thus return 0 in some circumstances.

This corrects the bug.

Signed-off-by: David Gibson <address@hidden>
Suggested-by: Richard Henderson <address@hidden>
[clg: replaced hweight_long() by ctpop64() ]
Signed-off-by: Cédric Le Goater <address@hidden>
 hw/ppc/pnv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index e7779581545d..9df7b25315af 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -620,7 +620,7 @@ static void pnv_chip_core_sanitize(PnvChip *chip, Error 
     chip->cores_mask &= pcc->cores_mask;
     /* now that we have a sane layout, let check the number of cores */
-    cores_max = hweight_long(chip->cores_mask);
+    cores_max = ctpop64(chip->cores_mask);
     if (chip->nr_cores > cores_max) {
         error_setg(errp, "warning: too many cores for chip ! Limit is %d",

reply via email to

[Prev in Thread] Current Thread [Next in Thread]