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[Qemu-devel] [PULL 04/28] intel_iommu: move ce fetching out when sync sh
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PULL 04/28] intel_iommu: move ce fetching out when sync shadow |
Date: |
Tue, 23 Oct 2018 19:41:30 -0400 |
From: Peter Xu <address@hidden>
There are two callers for vtd_sync_shadow_page_table_range(): one
provided a valid context entry and one not. Move that fetching
operation into the caller vtd_sync_shadow_page_table() where we need to
fetch the context entry.
Meanwhile, remove the error_report_once() directly since we're already
tracing all the error cases in the previous call. Instead, return error
number back to caller. This will not change anything functional since
callers are dropping it after all.
We do this move majorly because we want to do something more later in
vtd_sync_shadow_page_table().
Signed-off-by: Peter Xu <address@hidden>
Reviewed-by: Eric Auger <address@hidden>
Reviewed-by: Maxime Coquelin <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
hw/i386/intel_iommu.c | 41 +++++++++++++----------------------------
dtc | 2 +-
2 files changed, 14 insertions(+), 29 deletions(-)
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 306708eb3b..25e54671f4 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1045,7 +1045,6 @@ static int vtd_sync_shadow_page_hook(IOMMUTLBEntry *entry,
return 0;
}
-/* If context entry is NULL, we'll try to fetch it on our own. */
static int vtd_sync_shadow_page_table_range(VTDAddressSpace *vtd_as,
VTDContextEntry *ce,
hwaddr addr, hwaddr size)
@@ -1057,39 +1056,25 @@ static int
vtd_sync_shadow_page_table_range(VTDAddressSpace *vtd_as,
.notify_unmap = true,
.aw = s->aw_bits,
.as = vtd_as,
+ .domain_id = VTD_CONTEXT_ENTRY_DID(ce->hi),
};
- VTDContextEntry ce_cache;
- int ret;
- if (ce) {
- /* If the caller provided context entry, use it */
- ce_cache = *ce;
- } else {
- /* If the caller didn't provide ce, try to fetch */
- ret = vtd_dev_to_context_entry(s, pci_bus_num(vtd_as->bus),
- vtd_as->devfn, &ce_cache);
- if (ret) {
- /*
- * This should not really happen, but in case it happens,
- * we just skip the sync for this time. After all we even
- * don't have the root table pointer!
- */
- error_report_once("%s: invalid context entry for bus 0x%x"
- " devfn 0x%x",
- __func__, pci_bus_num(vtd_as->bus),
- vtd_as->devfn);
- return 0;
- }
- }
-
- info.domain_id = VTD_CONTEXT_ENTRY_DID(ce_cache.hi);
-
- return vtd_page_walk(&ce_cache, addr, addr + size, &info);
+ return vtd_page_walk(ce, addr, addr + size, &info);
}
static int vtd_sync_shadow_page_table(VTDAddressSpace *vtd_as)
{
- return vtd_sync_shadow_page_table_range(vtd_as, NULL, 0, UINT64_MAX);
+ int ret;
+ VTDContextEntry ce;
+
+ ret = vtd_dev_to_context_entry(vtd_as->iommu_state,
+ pci_bus_num(vtd_as->bus),
+ vtd_as->devfn, &ce);
+ if (ret) {
+ return ret;
+ }
+
+ return vtd_sync_shadow_page_table_range(vtd_as, &ce, 0, UINT64_MAX);
}
/*
diff --git a/dtc b/dtc
index 88f18909db..e54388015a 160000
--- a/dtc
+++ b/dtc
@@ -1 +1 @@
-Subproject commit 88f18909db731a627456f26d779445f84e449536
+Subproject commit e54388015af1fb4bf04d0bca99caba1074d9cc42
--
MST
- [Qemu-devel] [PULL 00/28] pci, pc, virtio: fixes, features, Michael S. Tsirkin, 2018/10/23
- [Qemu-devel] [PULL 04/28] intel_iommu: move ce fetching out when sync shadow,
Michael S. Tsirkin <=
- [Qemu-devel] [PULL 01/28] virtio-blk: fix comment for virtio_blk_rw_complete, Michael S. Tsirkin, 2018/10/23
- [Qemu-devel] [PULL 05/28] intel_iommu: handle invalid ce for shadow sync, Michael S. Tsirkin, 2018/10/23
- [Qemu-devel] [PULL 02/28] intel_iommu: introduce vtd_reset_caches(), Michael S. Tsirkin, 2018/10/23
- [Qemu-devel] [PULL 07/28] x86_iommu: move the kernel-irqchip check in common code, Michael S. Tsirkin, 2018/10/23
- [Qemu-devel] [PULL 09/28] x86_iommu/amd: remove V=1 check from amdvi_validate_dte(), Michael S. Tsirkin, 2018/10/23
- [Qemu-devel] [PULL 16/28] MAINTAINERS: list "tests/acpi-test-data" files in ACPI/SMBIOS section, Michael S. Tsirkin, 2018/10/23
- [Qemu-devel] [PULL 06/28] vhost-user-blk: start vhost when guest kicks, Michael S. Tsirkin, 2018/10/23
- [Qemu-devel] [PULL 17/28] pci-testdev: add optional memory bar, Michael S. Tsirkin, 2018/10/23
- [Qemu-devel] [PULL 10/28] x86_iommu/amd: make the address space naming consistent with intel-iommu, Michael S. Tsirkin, 2018/10/23
- [Qemu-devel] [PULL 24/28] pci_bridge: fix typo in comment, Michael S. Tsirkin, 2018/10/23