From: Zhenzhong Duan Date: Fri, 17 Oct 2025 09:36:01 +0000 (-0400) Subject: intel_iommu: Reset pasid cache when system level reset X-Git-Tag: v10.2.0-rc1~12^2~8 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=baff72ca2a67974cb19499e7f8b7d87675adc746;p=thirdparty%2Fqemu.git intel_iommu: Reset pasid cache when system level reset Reset pasid cache when system level reset. Currently we don't have any device supporting PASID yet. So all are PASID_0, its vtd_as is allocated by PCI system and never removed, just mark pasid cache invalid. Signed-off-by: Yi Liu Signed-off-by: Zhenzhong Duan Reviewed-by: Yi Liu Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Message-Id: <20251017093602.525338-3-zhenzhong.duan@intel.com> --- diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index c47f13b659..cf0b62f29e 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -87,6 +87,20 @@ struct vtd_iotlb_key { static void vtd_address_space_refresh_all(IntelIOMMUState *s); static void vtd_address_space_unmap(VTDAddressSpace *as, IOMMUNotifier *n); +static void vtd_pasid_cache_reset_locked(IntelIOMMUState *s) +{ + VTDAddressSpace *vtd_as; + GHashTableIter as_it; + + trace_vtd_pasid_cache_reset(); + + g_hash_table_iter_init(&as_it, s->vtd_address_spaces); + while (g_hash_table_iter_next(&as_it, NULL, (void **)&vtd_as)) { + VTDPASIDCacheEntry *pc_entry = &vtd_as->pasid_cache_entry; + pc_entry->valid = false; + } +} + static void vtd_define_quad(IntelIOMMUState *s, hwaddr addr, uint64_t val, uint64_t wmask, uint64_t w1cmask) { @@ -381,6 +395,7 @@ static void vtd_reset_caches(IntelIOMMUState *s) vtd_iommu_lock(s); vtd_reset_iotlb_locked(s); vtd_reset_context_cache_locked(s); + vtd_pasid_cache_reset_locked(s); vtd_iommu_unlock(s); } diff --git a/hw/i386/trace-events b/hw/i386/trace-events index 298addb24d..b704f4f90c 100644 --- a/hw/i386/trace-events +++ b/hw/i386/trace-events @@ -24,6 +24,7 @@ vtd_inv_qi_head(uint16_t head) "read head %d" vtd_inv_qi_tail(uint16_t head) "write tail %d" vtd_inv_qi_fetch(void) "" vtd_context_cache_reset(void) "" +vtd_pasid_cache_reset(void) "" vtd_inv_desc_pasid_cache_gsi(void) "" vtd_inv_desc_pasid_cache_dsi(uint16_t domain) "Domain selective PC invalidation domain 0x%"PRIx16 vtd_inv_desc_pasid_cache_psi(uint16_t domain, uint32_t pasid) "PASID selective PC invalidation domain 0x%"PRIx16" pasid 0x%"PRIx32