Enhance the fault detection, correction of the fault reporting.
Signed-off-by: Pierre Morel <pmo...@linux.vnet.ibm.com>
Reviewed-by: Yi Min Zhao <zyi...@linux.vnet.ibm.com>
---
hw/s390x/s390-pci-inst.c | 27 ++++++++++++++++-----------
1 file changed, 16 insertions(+), 11 deletions(-)
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index 4a2f996..62ebaa0 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -372,6 +372,11 @@ int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t
r2)
len = env->regs[r2] & 0xf;
offset = env->regs[r2 + 1];
+ if (!(fh & FH_MASK_ENABLE)) {
+ setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
+ return 0;
+ }
+
pbdev = s390_pci_find_dev_by_fh(s390_get_phb(), fh);
if (!pbdev) {
DPRINTF("pcilg no pci dev\n");
@@ -380,12 +385,7 @@ int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t
r2)
}
switch (pbdev->state) {
- case ZPCI_FS_RESERVED:
- case ZPCI_FS_STANDBY:
- case ZPCI_FS_DISABLED:
case ZPCI_FS_PERMANENT_ERROR:
- setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
- return 0;
case ZPCI_FS_ERROR:
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r2, ZPCI_PCI_ST_BLOCKED);
@@ -394,8 +394,9 @@ int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2)
break;
}
- if (pcias < 6) {
- if ((8 - (offset & 0x7)) < len) {
+ switch (pcias) {
+ case 0 ... 5:
+ if (!len || (len > (8 - (offset & 0x7)))) {
program_interrupt(env, PGM_OPERAND, 4);
return 0;
}
@@ -406,8 +407,9 @@ int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2)
program_interrupt(env, PGM_OPERAND, 4);
return 0;
}
- } else if (pcias == 15) {
- if ((4 - (offset & 0x3)) < len) {
+ break;
+ case 15:
+ if (!len || (len > (4 - (offset & 0x3))) || len == 3) {
program_interrupt(env, PGM_OPERAND, 4);
return 0;
}
@@ -418,8 +420,11 @@ int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t
r2)
program_interrupt(env, PGM_OPERAND, 4);
return 0;
}
- } else {
- DPRINTF("invalid space\n");
+ break;
+ case PCI_ROM_SLOT:
+ /* Fall through */
+ default:
+ DPRINTF("pcilg invalid space\n");
setcc(cpu, ZPCI_PCI_LS_ERR);
s390_set_status_code(env, r2, ZPCI_PCI_ST_INVAL_AS);
return 0;
--
2.7.4
