| Message ID | 1304423686-18909-2-git-send-email-agraf@suse.de |
|---|---|
| State | New |
| Headers | show |
diff --git a/kvm-all.c b/kvm-all.c index d92c20e..a30865e 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -590,6 +590,11 @@ static void kvm_set_phys_mem(target_phys_addr_t start_addr, ram_addr_t size, if (err) { fprintf(stderr, "%s: error registering prefix slot: %s\n", __func__, strerror(-err)); +#ifdef TARGET_PPC + fprintf(stderr, "%s: This is probably because your kernel's " \ + "PAGE_SIZE is too big. Please try to use 4k " \ + "PAGE_SIZE!\n", __func__); +#endif abort(); } }
On PPC, the default PAGE_SIZE is 64kb. Unfortunately, the hardware alignments don't match here: There are RAM and MMIO regions within a single page when it's 64kb in size. So the only way out for now is to tell the user that he should use 4k PAGE_SIZE. This patch gives the user a hint on that, telling him that failing to register a prefix slot is most likely to be caused by mismatching PAGE_SIZE. This way it's also more future-proof, as bigger PAGE_SIZE can easily be supported by other machines then, as long as they stick to 64kb granularities. Signed-off-by: Alexander Graf <agraf@suse.de> --- kvm-all.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-)