[PATCH] virt-host-validate: Fix IOMMU output on aarch64

[Fabiano Fidêncio]

virt-host-validate should print "Checking for device assignment IOMMU
support" for all architectures, not only for Intel / AMD.

This is the output without the patch:
```
[fidencio at dentola libvirt]$ virt-host-validate
  QEMU: comprobando if device /dev/kvm exists                                   : PASA
  QEMU: comprobando if device /dev/kvm is accessible                            : PASA
  QEMU: comprobando if device /dev/vhost-net exists                             : PASA
  QEMU: comprobando if device /dev/net/tun exists                               : PASA
  QEMU: comprobando for cgroup 'cpu' controller support                         : PASA
  QEMU: comprobando for cgroup 'cpuacct' controller support                     : PASA
  QEMU: comprobando for cgroup 'cpuset' controller support                      : PASA
  QEMU: comprobando for cgroup 'memory' controller support                      : PASA
  QEMU: comprobando for cgroup 'devices' controller support                     : ADVERTENCIA (Enable 'devices' in kernel Kconfig file or mount/enable cgroup controller in your system)
  QEMU: comprobando for cgroup 'blkio' controller support                       : PASA
ADVERTENCIA (Unknown if this platform has IOMMU support)
  QEMU: comprobando for secure guest support                                    : ADVERTENCIA (Unknown if this platform has Secure Guest support)

```

This is the output with the patch:
```
[fidencio at dentola libvirt]$ ./build/tools/virt-host-validate
  QEMU: Checking if device /dev/kvm exists                                   : PASS
  QEMU: Checking if device /dev/kvm is accessible                            : PASS
  QEMU: Checking if device /dev/vhost-net exists                             : PASS
  QEMU: Checking if device /dev/net/tun exists                               : PASS
  QEMU: Checking for cgroup 'cpu' controller support                         : PASS
  QEMU: Checking for cgroup 'cpuacct' controller support                     : PASS
  QEMU: Checking for cgroup 'cpuset' controller support                      : PASS
  QEMU: Checking for cgroup 'memory' controller support                      : PASS
  QEMU: Checking for cgroup 'devices' controller support                     : WARN (Enable 'devices' in kernel Kconfig file or mount/enable cgroup controller in your system)
  QEMU: Checking for cgroup 'blkio' controller support                       : PASS
  QEMU: Checking for device assignment IOMMU support                         : WARN (Unknown if this platform has IOMMU support)
  QEMU: Checking for secure guest support                                    : WARN (Unknown if this platform has Secure Guest support)
```

Signed-off-by: Fabiano Fidêncio <fabiano at fidencio.org>
---
This is a follow-up on https://listman.redhat.com/archives/libvir-list/2021-June/msg00190.html
---
 tools/virt-host-validate-common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/virt-host-validate-common.c b/tools/virt-host-validate-common.c
index 9412bb7514..ee22a88b31 100644
--- a/tools/virt-host-validate-common.c
+++ b/tools/virt-host-validate-common.c
@@ -335,6 +335,8 @@ int virHostValidateIOMMU(const char *hvname,
     struct dirent *dent;
     int rc;
 
+    virHostMsgCheck(hvname, "%s", _("for device assignment IOMMU support"));
+
     flags = virHostValidateGetCPUFlags();
 
     if (flags && virBitmapIsBitSet(flags, VIR_HOST_VALIDATE_CPU_FLAG_VMX))
@@ -345,7 +347,6 @@ int virHostValidateIOMMU(const char *hvname,
     virBitmapFree(flags);
 
     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";
@@ -357,7 +358,6 @@ int virHostValidateIOMMU(const char *hvname,
             return VIR_HOST_VALIDATE_FAILURE(level);
         }
     } 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";
-- 
2.31.1