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authorChristian Borntraeger <borntraeger@de.ibm.com>2011-05-12 10:50:44 +0200
committerAlexander Graf <agraf@suse.de>2011-05-20 17:35:13 +0200
commit22486aa04aa300db0cc5887d9612b4d486f0edac (patch)
tree449174d7566f3812befecbbb33c63aeec9419521 /target-s390x
parentff83678aee5269619338645ec23b00b1c7506fca (diff)
s390x: fix memory detection for guests > 64GB
the s390 memory detection has a 16bit field that specifies the amount of increments. This patch adopts the memory size to always fit into that scheme. This also fixes virtio detection for these guests, since the descriptor page is located after the main memory. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-s390x')
-rw-r--r--target-s390x/op_helper.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/target-s390x/op_helper.c b/target-s390x/op_helper.c
index 9153940540..49760a40a2 100644
--- a/target-s390x/op_helper.c
+++ b/target-s390x/op_helper.c
@@ -2361,6 +2361,7 @@ static void ext_interrupt(CPUState *env, int type, uint32_t param,
int sclp_service_call(CPUState *env, uint32_t sccb, uint64_t code)
{
int r = 0;
+ int shift = 0;
#ifdef DEBUG_HELPER
printf("sclp(0x%x, 0x%" PRIx64 ")\n", sccb, code);
@@ -2375,8 +2376,11 @@ int sclp_service_call(CPUState *env, uint32_t sccb, uint64_t code)
switch(code) {
case SCLP_CMDW_READ_SCP_INFO:
case SCLP_CMDW_READ_SCP_INFO_FORCED:
- stw_phys(sccb + SCP_MEM_CODE, ram_size >> 20);
- stb_phys(sccb + SCP_INCREMENT, 1);
+ while ((ram_size >> (20 + shift)) > 65535) {
+ shift++;
+ }
+ stw_phys(sccb + SCP_MEM_CODE, ram_size >> (20 + shift));
+ stb_phys(sccb + SCP_INCREMENT, 1 << shift);
stw_phys(sccb + SCP_RESPONSE_CODE, 0x10);
if (kvm_enabled()) {