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From: Greg Kurz <groug@kaod.org>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: qemu-ppc@nongnu.org, "Philippe Mathieu-Daudé" <philmd@redhat.com>,
Subject: [PATCH 1/2] spapr: Drop dead code in spapr_reallocate_hpt()
Date: Thu, 29 Oct 2020 16:33:48 +0100
Message-ID: <160398562892.32380.15006707861753544263.stgit@bahia.lan> (raw)

Sometimes QEMU needs to allocate the HPT in userspace, namely with TCG
or PR KVM. This is performed with qemu_memalign() because of alignment
requirements. Like glib's allocators, its behaviour is to abort on OOM
instead of returning NULL.

This could be changed to qemu_try_memalign(), but in the specific case
of spapr_reallocate_hpt(), the outcome would be to terminate QEMU anyway
since no HPT means no MMU for the guest. Drop the dead code instead.

Signed-off-by: Greg Kurz <groug@kaod.org>
 hw/ppc/spapr.c |    6 ------
 1 file changed, 6 deletions(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 227075103e9a..12a012d9dd09 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1522,12 +1522,6 @@ int spapr_reallocate_hpt(SpaprMachineState *spapr, int shift, Error **errp)
         int i;
         spapr->htab = qemu_memalign(size, size);
-        if (!spapr->htab) {
-            error_setg_errno(errp, errno,
-                             "Could not allocate HPT of order %d", shift);
-            return -ENOMEM;
-        }
         memset(spapr->htab, 0, size);
         spapr->htab_shift = shift;

             reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-29 15:33 Greg Kurz [this message]
2020-10-29 15:33 ` [PATCH 2/2] spapr: Convert hpt_prepare_thread() to use qemu_try_memalign() Greg Kurz
2020-10-29 20:11 ` [PATCH 1/2] spapr: Drop dead code in spapr_reallocate_hpt() David Gibson

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