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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-06-01 21:35:14 +0200 |
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| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-06-01 21:35:14 +0200 |
| commit | 3e4c5a6261770bced301b5e74233e7866166ea5b (patch) | |
| tree | 9379fddaba693ef8a045da06efee8529baa5f6f4 /gitlab/issues_text/target_missing/host_missing/accel_missing/2014 | |
| parent | e5634e2806195bee44407853c4bf8776f7abfa4f (diff) | |
| download | qemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.tar.gz qemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.zip | |
clean up repository
Diffstat (limited to 'gitlab/issues_text/target_missing/host_missing/accel_missing/2014')
| -rw-r--r-- | gitlab/issues_text/target_missing/host_missing/accel_missing/2014 | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/gitlab/issues_text/target_missing/host_missing/accel_missing/2014 b/gitlab/issues_text/target_missing/host_missing/accel_missing/2014 deleted file mode 100644 index b3cc9db95..000000000 --- a/gitlab/issues_text/target_missing/host_missing/accel_missing/2014 +++ /dev/null @@ -1,53 +0,0 @@ -virtio: bounce.in_use==true in virtqueue_map_desc() -Description of problem: - -Steps to reproduce: -1. Build EDK II (edk2-stable202311) for riscv64 -2. Build UEFI SCT (commit 81dfa8d53d4290) for riscv64 -3. Run the UEFI SCT -4. Observe the message "qemu: virtio: bogus descriptor or out of resources" after which the execution stalls. - -The full procedure is described in https://github.com/xypron/sct_release_test - -To save time you can call `sct -u` and select only test 'MediaAccessTest\\BlockIOProtocolTest'. Run it with `F9`. -Additional information: -virtqueue_map_desc() may be called for a large buffers size `sz`. It will then call dma_memory_map() multiple times in a loop. In address_space_map() `bounce.in_use` is set to `true` on the first call. Each subsequent call is bound to fail. - -To verify this is the cause I applied the following diff: - -```plaintext -diff --git a/system/physmem.c b/system/physmem.c -index a63853a7bc..12b3c2f828 100644 ---- a/system/physmem.c -+++ b/system/physmem.c -@@ -3151,12 +3151,16 @@ void *address_space_map(AddressSpace *as, - - if (!memory_access_is_direct(mr, is_write)) { - if (qatomic_xchg(&bounce.in_use, true)) { -+ fprintf(stderr, "bounce.in_use in address_space_map\n"); -+ - *plen = 0; - return NULL; - } - /* Avoid unbounded allocations */ - l = MIN(l, TARGET_PAGE_SIZE); - bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, l); -+ if (!bounce.buffer) -+ fprintf(stderr, "Out of memory in address_space_map\n"); - bounce.addr = addr; - bounce.len = l; -``` - -and saw this output: - -```plaintext -Logfile: "\sct\Log\MediaAccessTest\BlockIOProtocolTest0\ReadBlocks_Conf_0_0_8261 -59D3-04A5-4CCE-8431-344707A8B57A.log" -Test Started: 12/02/23 08:43a ------------------------------------------------------------- -Current Device: Acpi(PNP0A03,0)/Pci(3|0) -Bounce.in_use in address_space_map -qemu: virtio: bogus descriptor or out of resources -``` - -See related bug #850. |