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qemu: hostdev: Move parts of qemuHostdevHostSupportsPassthroughVFIO() into separate function
Signed-off-by: Filip Alac <filipalac@gmail.com> Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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134c3ddb43
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1597e155b2
@ -3076,6 +3076,7 @@ virGetUserName;
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virGetUserRuntimeDirectory;
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virGetUserShell;
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virHexToBin;
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virHostHasIOMMU;
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virIndexToDiskName;
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virIsDevMapperDevice;
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virIsSUID;
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@ -23,7 +23,6 @@
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#include <config.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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@ -124,33 +123,15 @@ qemuHostdevUpdateActiveDomainDevices(virQEMUDriverPtr driver,
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bool
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qemuHostdevHostSupportsPassthroughVFIO(void)
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{
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DIR *iommuDir = NULL;
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struct dirent *iommuGroup = NULL;
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bool ret = false;
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int direrr;
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/* condition 1 - /sys/kernel/iommu_groups/ contains entries */
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if (virDirOpenQuiet(&iommuDir, "/sys/kernel/iommu_groups/") < 0)
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goto cleanup;
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while ((direrr = virDirRead(iommuDir, &iommuGroup, NULL)) > 0) {
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/* assume we found a group */
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break;
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}
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if (direrr < 0 || !iommuGroup)
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goto cleanup;
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/* okay, iommu is on and recognizes groups */
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/* condition 1 - host has IOMMU */
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if (!virHostHasIOMMU())
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return false;
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/* condition 2 - /dev/vfio/vfio exists */
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if (!virFileExists("/dev/vfio/vfio"))
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goto cleanup;
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return false;
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ret = true;
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cleanup:
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VIR_DIR_CLOSE(iommuDir);
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return ret;
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return true;
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}
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@ -2090,3 +2090,28 @@ virMemoryMaxValue(bool capped)
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else
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return LLONG_MAX;
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}
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bool
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virHostHasIOMMU(void)
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{
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DIR *iommuDir = NULL;
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struct dirent *iommuGroup = NULL;
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bool ret = false;
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int direrr;
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if (virDirOpenQuiet(&iommuDir, "/sys/kernel/iommu_groups/") < 0)
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goto cleanup;
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while ((direrr = virDirRead(iommuDir, &iommuGroup, NULL)) > 0)
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break;
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if (direrr < 0 || !iommuGroup)
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goto cleanup;
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ret = true;
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cleanup:
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VIR_DIR_CLOSE(iommuDir);
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return ret;
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}
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@ -216,6 +216,8 @@ unsigned long long virMemoryLimitTruncate(unsigned long long value);
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bool virMemoryLimitIsSet(unsigned long long value);
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unsigned long long virMemoryMaxValue(bool ulong) ATTRIBUTE_NOINLINE;
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bool virHostHasIOMMU(void);
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/**
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* VIR_ASSIGN_IS_OVERFLOW:
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* @rvalue: value that is checked (evaluated twice)
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