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virt-host-validate: Fix warning for IOMMU detection on PPC

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Fix the warning generated on PPC by virt-host-validate for IOMMU.
In case of PPC, IOMMU in the host kernel either has it or it's not
compiled in. The /sys/kernel/iommu_groups check is good enough to
verify if it was compiled with the kernel or not.

Modify the error message when "if (sb.st_nlink <= 2)" to indicate
what the problem would be since there would be no @bootarg.

Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
This commit is contained in:
Nitesh Konkar 2017-08-17 19:18:05 +05:30 committed by John Ferlan
parent 70f564d8f4
commit 941ec9b6a7
1 changed files with 13 additions and 6 deletions
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19
tools/virt-host-validate-common.c
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@ -35,6 +35,7 @@
#include "virfile.h"
#include "virt-host-validate-common.h"
#include "virstring.h"
#include "virarch.h"
#define VIR_FROM_THIS VIR_FROM_NONE
@ -442,8 +443,7 @@ int virHostValidateIOMMU(const char *hvname,
virBitmapPtr flags;
struct stat sb;
const char *bootarg = NULL;
bool isAMD = false, isIntel = false;
bool isAMD = false, isIntel = false, isPPC = false;
flags = virHostValidateGetCPUFlags();
if (flags && virBitmapIsBitSet(flags, VIR_HOST_VALIDATE_CPU_FLAG_VMX))
@ -453,9 +453,10 @@ int virHostValidateIOMMU(const char *hvname,
virBitmapFree(flags);
virHostMsgCheck(hvname, "%s", _("for device assignment IOMMU support"));
isPPC = ARCH_IS_PPC64(virArchFromHost());
if (isIntel) {
virHostMsgCheck(hvname, "%s", _("for device assignment IOMMU support"));
if (access("/sys/firmware/acpi/tables/DMAR", F_OK) == 0) {
virHostMsgPass();
bootarg = "intel_iommu=on";
@ -467,6 +468,7 @@ int virHostValidateIOMMU(const char *hvname,
return -1;
}
} else if (isAMD) {
virHostMsgCheck(hvname, "%s", _("for device assignment IOMMU support"));
if (access("/sys/firmware/acpi/tables/IVRS", F_OK) == 0) {
virHostMsgPass();
bootarg = "iommu=pt iommu=1";
@ -477,6 +479,8 @@ int virHostValidateIOMMU(const char *hvname,
"hardware platform");
return -1;
}
} else if (isPPC) {
/* Empty Block */
} else {
virHostMsgFail(level,
"Unknown if this platform has IOMMU support");
@ -493,9 +497,12 @@ int virHostValidateIOMMU(const char *hvname,
virHostMsgCheck(hvname, "%s", _("if IOMMU is enabled by kernel"));
if (sb.st_nlink <= 2) {
virHostMsgFail(level,
"IOMMU appears to be disabled in kernel. "
"Add %s to kernel cmdline arguments", bootarg);
if (!isPPC)
virHostMsgFail(level,
"IOMMU appears to be disabled in kernel. "
"Add %s to kernel cmdline arguments", bootarg);
else
virHostMsgFail(level, "IOMMU capability not compiled into kernel.");
return -1;
}
virHostMsgPass();