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From 4084168a694381238dadf1f5c0cc4af756ac883f Mon Sep 17 00:00:00 2001
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From: Peter Xu <peterx@redhat.com>
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Date: Thu, 8 Nov 2018 06:29:37 +0000
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Subject: [PATCH 09/35] intel_iommu: move ce fetching out when sync shadow
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RH-Author: Peter Xu <peterx@redhat.com>
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Message-id: <20181108062938.21143-7-peterx@redhat.com>
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Patchwork-id: 82965
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O-Subject: [RHEL-8 qemu-kvm PATCH 6/7] intel_iommu: move ce fetching out when sync shadow
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Bugzilla: 1625173
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RH-Acked-by: Auger Eric <eric.auger@redhat.com>
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RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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Bugzilla: 1629616
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There are two callers for vtd_sync_shadow_page_table_range(): one
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provided a valid context entry and one not. Move that fetching
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operation into the caller vtd_sync_shadow_page_table() where we need to
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fetch the context entry.
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Meanwhile, remove the error_report_once() directly since we're already
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tracing all the error cases in the previous call. Instead, return error
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number back to caller. This will not change anything functional since
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callers are dropping it after all.
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We do this move majorly because we want to do something more later in
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vtd_sync_shadow_page_table().
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Signed-off-by: Peter Xu <peterx@redhat.com>
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Reviewed-by: Eric Auger <eric.auger@redhat.com>
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Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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(cherry picked from commit 95ecd3df7815b4bc4f9a0f47e1c64d81434715aa)
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Signed-off-by: Peter Xu <peterx@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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hw/i386/intel_iommu.c | 41 +++++++++++++----------------------------
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1 file changed, 13 insertions(+), 28 deletions(-)
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diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
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index a6e87a9..c95128d 100644
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--- a/hw/i386/intel_iommu.c
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+++ b/hw/i386/intel_iommu.c
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@@ -1045,7 +1045,6 @@ static int vtd_sync_shadow_page_hook(IOMMUTLBEntry *entry,
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return 0;
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}
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-/* If context entry is NULL, we'll try to fetch it on our own. */
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static int vtd_sync_shadow_page_table_range(VTDAddressSpace *vtd_as,
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VTDContextEntry *ce,
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hwaddr addr, hwaddr size)
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@@ -1057,39 +1056,25 @@ static int vtd_sync_shadow_page_table_range(VTDAddressSpace *vtd_as,
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.notify_unmap = true,
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.aw = s->aw_bits,
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.as = vtd_as,
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+ .domain_id = VTD_CONTEXT_ENTRY_DID(ce->hi),
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};
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- VTDContextEntry ce_cache;
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- int ret;
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-
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- if (ce) {
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- /* If the caller provided context entry, use it */
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- ce_cache = *ce;
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- } else {
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- /* If the caller didn't provide ce, try to fetch */
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- ret = vtd_dev_to_context_entry(s, pci_bus_num(vtd_as->bus),
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- vtd_as->devfn, &ce_cache);
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- if (ret) {
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- /*
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- * This should not really happen, but in case it happens,
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- * we just skip the sync for this time. After all we even
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- * don't have the root table pointer!
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- */
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- error_report_once("%s: invalid context entry for bus 0x%x"
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- " devfn 0x%x",
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- __func__, pci_bus_num(vtd_as->bus),
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- vtd_as->devfn);
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- return 0;
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- }
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- }
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- info.domain_id = VTD_CONTEXT_ENTRY_DID(ce_cache.hi);
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-
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- return vtd_page_walk(&ce_cache, addr, addr + size, &info;;
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+ return vtd_page_walk(ce, addr, addr + size, &info;;
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}
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static int vtd_sync_shadow_page_table(VTDAddressSpace *vtd_as)
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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{
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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- return vtd_sync_shadow_page_table_range(vtd_as, NULL, 0, UINT64_MAX);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ int ret;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ VTDContextEntry ce;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ ret = vtd_dev_to_context_entry(vtd_as->iommu_state,
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ pci_bus_num(vtd_as->bus),
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ vtd_as->devfn, &ce);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ if (ret) {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ return ret;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ }
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ return vtd_sync_shadow_page_table_range(vtd_as, &ce, 0, UINT64_MAX);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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}
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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/*
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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--
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
1.8.3.1
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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