diff options
| author | Aviv Ben-David <bd.aviv@gmail.com> | 2017-02-07 16:28:06 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2017-02-17 21:52:31 +0200 |
| commit | 3b40f0e53c2ebfcec8aabab7e91c11c5bd441ac0 (patch) | |
| tree | 38818f44ffdb67629ae33232036e1f3d05134b0c /hw | |
| parent | dfbd90e5b9b772b1c5a52bad9f6dbabb385a7dc2 (diff) | |
intel_iommu: add "caching-mode" option
This capability asks the guest to invalidate cache before each map operation.
We can use this invalidation to trap map operations in the hypervisor.
Signed-off-by: Aviv Ben-David <bd.aviv@gmail.com>
[peterx: using "caching-mode" instead of "cache-mode" to align with spec]
[peterx: re-write the subject to make it short and clear]
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Aviv Ben-David <bd.aviv@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/i386/intel_iommu.c | 5 | ||||
| -rw-r--r-- | hw/i386/intel_iommu_internal.h | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 3270fb9162..50251c3090 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -2115,6 +2115,7 @@ static Property vtd_properties[] = { DEFINE_PROP_ON_OFF_AUTO("eim", IntelIOMMUState, intr_eim, ON_OFF_AUTO_AUTO), DEFINE_PROP_BOOL("x-buggy-eim", IntelIOMMUState, buggy_eim, false), + DEFINE_PROP_BOOL("caching-mode", IntelIOMMUState, caching_mode, FALSE), DEFINE_PROP_END_OF_LIST(), }; @@ -2496,6 +2497,10 @@ static void vtd_init(IntelIOMMUState *s) s->ecap |= VTD_ECAP_DT; } + if (s->caching_mode) { + s->cap |= VTD_CAP_CM; + } + vtd_reset_context_cache(s); vtd_reset_iotlb(s); diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h index 356f188b73..41041219ba 100644 --- a/hw/i386/intel_iommu_internal.h +++ b/hw/i386/intel_iommu_internal.h @@ -202,6 +202,7 @@ #define VTD_CAP_MAMV (VTD_MAMV << 48) #define VTD_CAP_PSI (1ULL << 39) #define VTD_CAP_SLLPS ((1ULL << 34) | (1ULL << 35)) +#define VTD_CAP_CM (1ULL << 7) /* Supported Adjusted Guest Address Widths */ #define VTD_CAP_SAGAW_SHIFT 8 |