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From c856dbfb24dcca457dfe8daadfe5a657f60e79f7 Mon Sep 17 00:00:00 2001
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From: Peter Xu <peterx@redhat.com>
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Date: Fri, 12 Oct 2018 07:58:44 +0100
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Subject: [PATCH 14/17] intel-iommu: trace domain id during page walk
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RH-Author: Peter Xu <peterx@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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Message-id: <20181012075846.25449-8-peterx@redhat.com>
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Patchwork-id: 82680
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O-Subject: [RHEL-8 qemu-kvm PATCH 7/9] intel-iommu: trace domain id during page walk
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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Bugzilla: 1450712
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RH-Acked-by: Auger Eric <eric.auger@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
RH-Acked-by: Xiao Wang <jasowang@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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ae23c9 |
This patch only modifies the trace points.
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ae23c9 |
Previously we were tracing page walk levels. They are redundant since
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ae23c9 |
we have page mask (size) already. Now we trace something much more
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ae23c9 |
useful which is the domain ID of the page walking. That can be very
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ae23c9 |
useful when we trace more than one devices on the same system, so that
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ae23c9 |
we can know which map is for which domain.
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ae23c9 |
CC: QEMU Stable <qemu-stable@nongnu.org>
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ae23c9 |
Signed-off-by: Peter Xu <peterx@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
ae23c9 |
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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(cherry picked from commit d118c06ebbee2d23ddf873cae4a809311aa61310)
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Signed-off-by: Peter Xu <peterx@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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---
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hw/i386/intel_iommu.c | 16 ++++++++++------
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hw/i386/trace-events | 2 +-
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2 files changed, 11 insertions(+), 7 deletions(-)
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diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
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index a882894..61bb3d3 100644
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--- a/hw/i386/intel_iommu.c
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+++ b/hw/i386/intel_iommu.c
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@@ -756,6 +756,7 @@ typedef int (*vtd_page_walk_hook)(IOMMUTLBEntry *entry, void *private);
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* @notify_unmap: whether we should notify invalid entries
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* @as: VT-d address space of the device
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* @aw: maximum address width
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+ * @domain: domain ID of the page walk
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*/
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typedef struct {
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VTDAddressSpace *as;
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@@ -763,17 +764,18 @@ typedef struct {
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void *private;
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bool notify_unmap;
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uint8_t aw;
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+ uint16_t domain_id;
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} vtd_page_walk_info;
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-static int vtd_page_walk_one(IOMMUTLBEntry *entry, int level,
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- vtd_page_walk_info *info)
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+static int vtd_page_walk_one(IOMMUTLBEntry *entry, vtd_page_walk_info *info)
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{
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vtd_page_walk_hook hook_fn = info->hook_fn;
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void *private = info->private;
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assert(hook_fn);
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- trace_vtd_page_walk_one(level, entry->iova, entry->translated_addr,
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- entry->addr_mask, entry->perm);
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+ trace_vtd_page_walk_one(info->domain_id, entry->iova,
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+ entry->translated_addr, entry->addr_mask,
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+ entry->perm);
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return hook_fn(entry, private);
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}
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@@ -844,7 +846,7 @@ static int vtd_page_walk_level(dma_addr_t addr, uint64_t start,
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trace_vtd_page_walk_skip_perm(iova, iova_next);
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goto next;
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}
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- ret = vtd_page_walk_one(&entry, level, info);
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+ ret = vtd_page_walk_one(&entry, info);
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if (ret < 0) {
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return ret;
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}
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@@ -856,7 +858,7 @@ static int vtd_page_walk_level(dma_addr_t addr, uint64_t start,
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* Translated address is meaningless, zero it.
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*/
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entry.translated_addr = 0x0;
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- ret = vtd_page_walk_one(&entry, level, info);
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+ ret = vtd_page_walk_one(&entry, info);
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if (ret < 0) {
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return ret;
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}
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@@ -1466,6 +1468,7 @@ static void vtd_iotlb_page_invalidate_notify(IntelIOMMUState *s,
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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 = domain_id,
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};
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/*
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@@ -2947,6 +2950,7 @@ static void vtd_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n)
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.notify_unmap = false,
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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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vtd_page_walk(&ce, 0, ~0ULL, &info;;
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diff --git a/hw/i386/trace-events b/hw/i386/trace-events
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index 22d4464..ca23ba9 100644
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--- a/hw/i386/trace-events
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+++ b/hw/i386/trace-events
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@@ -39,7 +39,7 @@ vtd_fault_disabled(void) "Fault processing disabled for context entry"
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vtd_replay_ce_valid(uint8_t bus, uint8_t dev, uint8_t fn, uint16_t domain, uint64_t hi, uint64_t lo) "replay valid context device %02"PRIx8":%02"PRIx8".%02"PRIx8" domain 0x%"PRIx16" hi 0x%"PRIx64" lo 0x%"PRIx64
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vtd_replay_ce_invalid(uint8_t bus, uint8_t dev, uint8_t fn) "replay invalid context device %02"PRIx8":%02"PRIx8".%02"PRIx8
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vtd_page_walk_level(uint64_t addr, uint32_t level, uint64_t start, uint64_t end) "walk (base=0x%"PRIx64", level=%"PRIu32") iova range 0x%"PRIx64" - 0x%"PRIx64
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-vtd_page_walk_one(uint32_t level, uint64_t iova, uint64_t gpa, uint64_t mask, int perm) "detected page level 0x%"PRIx32" iova 0x%"PRIx64" -> gpa 0x%"PRIx64" mask 0x%"PRIx64" perm %d"
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+vtd_page_walk_one(uint16_t domain, uint64_t iova, uint64_t gpa, uint64_t mask, int perm) "domain 0x%"PRIu16" iova 0x%"PRIx64" -> gpa 0x%"PRIx64" mask 0x%"PRIx64" perm %d"
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vtd_page_walk_skip_read(uint64_t iova, uint64_t next) "Page walk skip iova 0x%"PRIx64" - 0x%"PRIx64" due to unable to read"
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vtd_page_walk_skip_perm(uint64_t iova, uint64_t next) "Page walk skip iova 0x%"PRIx64" - 0x%"PRIx64" due to perm empty"
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vtd_page_walk_skip_reserve(uint64_t iova, uint64_t next) "Page walk skip iova 0x%"PRIx64" - 0x%"PRIx64" due to rsrv set"
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--
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1.8.3.1
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