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s390x/pci: rework PCI LOAD 

Enhance the fault detection, correction of the fault reporting.

Signed-off-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Reviewed-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Message-Id: <1512046530-17773-4-git-send-email-pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Pierre Morel 2017-11-30 13:55:26 +01:00 committed by Cornelia Huck
parent 7645b9a794
commit 8cbd6aab95
1 changed files with 14 additions and 11 deletions
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25
hw/s390x/s390-pci-inst.c
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@ -377,6 +377,11 @@ int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
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");
@ -385,12 +390,7 @@ int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
}
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);
@ -399,8 +399,9 @@ int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
break;
}
if (pcias < 6) {
if ((8 - (offset & 0x7)) < len) {
switch (pcias) {
case ZPCI_IO_BAR_MIN...ZPCI_IO_BAR_MAX:
if (!len || (len > (8 - (offset & 0x7)))) {
s390_program_interrupt(env, PGM_OPERAND, 4, ra);
return 0;
}
@ -411,8 +412,9 @@ int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
s390_program_interrupt(env, PGM_OPERAND, 4, ra);
return 0;
}
} else if (pcias == 15) {
if ((4 - (offset & 0x3)) < len) {
break;
case ZPCI_CONFIG_BAR:
if (!len || (len > (4 - (offset & 0x3))) || len == 3) {
s390_program_interrupt(env, PGM_OPERAND, 4, ra);
return 0;
}
@ -423,8 +425,9 @@ int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
s390_program_interrupt(env, PGM_OPERAND, 4, ra);
return 0;
}
} else {
DPRINTF("invalid space\n");
break;
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;