On 10/01/2023 15.29, Thomas Huth wrote:
On 05/01/2023 15.53, Pierre Morel wrote:
On interception of STSI(15.1.x) the System Information Block
(SYSIB) is built from the list of pre-ordered topology entries.
Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
---
...
+void insert_stsi_15_1_x(S390CPU *cpu, int sel2, __u64 addr, uint8_t ar)
+{
+ union {
+ char place_holder[S390_TOPOLOGY_SYSIB_SIZE];
+ SysIB_151x sysib;
+ } buffer QEMU_ALIGNED(8) = {};
+ int len;
+
+ if (!s390_has_topology() || sel2 < 2 || sel2 >
SCLP_READ_SCP_INFO_MNEST) {
+ setcc(cpu, 3);
+ return;
+ }
+
+ len = setup_stsi(cpu, &buffer.sysib, sel2);
+
+ if (len > 4096) {
Maybe use TARGET_PAGE_SIZE instead of 4096 ?
+ setcc(cpu, 3);
+ return;
+ }
+
+ buffer.sysib.length = cpu_to_be16(len);
+ s390_cpu_virt_mem_write(cpu, addr, ar, &buffer.sysib, len);
Is this supposed to work with protected guests, too? If so, I think you
likely need to use s390_cpu_pv_mem_write() for protected guests?
I now saw in a later patch that the topology feature gets disabled for
protected guests - so never mind, please ignore my question here.
Thomas
