app-emulation/qemu: fix some automagic and patch runtime crash

Fix automagic audio backend use/linking (alsa, jack, oss, pulseaudio)
and pam, add upstream patches to fix crash when with user-provided
SLIC table, and fix calculating the --audio-drv-list argument.

Bug: https://bugs.gentoo.org/830170
Thanks-To: Ionen Wolkens <ionen@gentoo.org>
Signed-off-by: John Helmert III <ajak@gentoo.org>

1 files changed, 168 insertions, 0 deletions

diff --git a/app-emulation/qemu/files/qemu-6.2.0-user-SLIC-crash.patch b/app-emulation/qemu/files/qemu-6.2.0-user-SLIC-crash.patch
new file mode 100644
index 000000000000..7d22feeade2a
--- /dev/null
+++ b/app-emulation/qemu/files/qemu-6.2.0-user-SLIC-crash.patch
@@ -0,0 +1,168 @@
+commit dce6c86f54eab61028e110497c222e73381379df
+Author: Igor Mammedov <imammedo@redhat.com>
+Date:   Mon Dec 27 14:31:17 2021 -0500
+
+    acpi: fix QEMU crash when started with SLIC table
+    
+    if QEMU is started with used provided SLIC table blob,
+    
+      -acpitable sig=SLIC,oem_id='CRASH ',oem_table_id="ME",oem_rev=00002210,asl_compiler_id="",asl_compiler_rev=00000000,data=/dev/null
+    it will assert with:
+    
+      hw/acpi/aml-build.c:61:build_append_padded_str: assertion failed: (len <= maxlen)
+    
+    and following backtrace:
+    
+      ...
+      build_append_padded_str (array=0x555556afe320, str=0x555556afdb2e "CRASH ME", maxlen=0x6, pad=0x20) at hw/acpi/aml-build.c:61
+      acpi_table_begin (desc=0x7fffffffd1b0, array=0x555556afe320) at hw/acpi/aml-build.c:1727
+      build_fadt (tbl=0x555556afe320, linker=0x555557ca3830, f=0x7fffffffd318, oem_id=0x555556afdb2e "CRASH ME", oem_table_id=0x555556afdb34 "ME") at hw/acpi/aml-build.c:2064
+      ...
+    
+    which happens due to acpi_table_begin() expecting NULL terminated
+    oem_id and oem_table_id strings, which is normally the case, but
+    in case of user provided SLIC table, oem_id points to table's blob
+    directly and as result oem_id became longer than expected.
+    
+    Fix issue by handling oem_id consistently and make acpi_get_slic_oem()
+    return NULL terminated strings.
+    
+    PS:
+    After [1] refactoring, oem_id semantics became inconsistent, where
+    NULL terminated string was coming from machine and old way pointer
+    into byte array coming from -acpitable option. That used to work
+    since build_header() wasn't expecting NULL terminated string and
+    blindly copied the 1st 6 bytes only.
+    
+    However commit [2] broke that by replacing build_header() with
+    acpi_table_begin(), which was expecting NULL terminated string
+    and was checking oem_id size.
+    
+    1) 602b45820 ("acpi: Permit OEM ID and OEM table ID fields to be changed")
+    2)
+    Fixes: 4b56e1e4eb08 ("acpi: build_fadt: use acpi_table_begin()/acpi_table_end() instead of build_header()")
+    Resolves: https://gitlab.com/qemu-project/qemu/-/issues/786
+    Signed-off-by: Igor Mammedov <imammedo@redhat.com>
+
+diff --git a/hw/acpi/core.c b/hw/acpi/core.c
+index 1e004d0078..3e811bf03c 100644
+--- a/hw/acpi/core.c
++++ b/hw/acpi/core.c
+@@ -345,8 +345,8 @@ int acpi_get_slic_oem(AcpiSlicOem *oem)
+         struct acpi_table_header *hdr = (void *)(u - sizeof(hdr->_length));
+ 
+         if (memcmp(hdr->sig, "SLIC", 4) == 0) {
+-            oem->id = hdr->oem_id;
+-            oem->table_id = hdr->oem_table_id;
++            oem->id = g_strndup(hdr->oem_id, 6);
++            oem->table_id = g_strndup(hdr->oem_table_id, 8);
+             return 0;
+         }
+     }
+diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
+index a99c6e4fe3..570f82997b 100644
+--- a/hw/i386/acpi-build.c
++++ b/hw/i386/acpi-build.c
+@@ -2721,6 +2721,8 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
+ 
+     /* Cleanup memory that's no longer used. */
+     g_array_free(table_offsets, true);
++    g_free(slic_oem.id);
++    g_free(slic_oem.table_id);
+ }
+ 
+ static void acpi_ram_update(MemoryRegion *mr, GArray *data)
+
+commit a22de122ad03ea40953ad0328b2c3e31002d8052
+Author: Igor Mammedov <imammedo@redhat.com>
+Date:   Mon Dec 27 14:31:18 2021 -0500
+
+    tests: acpi: whitelist expected blobs before changing them
+    
+    Signed-off-by: Igor Mammedov <imammedo@redhat.com>
+
+diff --git a/tests/data/acpi/q35/FACP.slic b/tests/data/acpi/q35/FACP.slic
+new file mode 100644
+index 0000000000..f6a864cc86
+Binary files /dev/null and b/tests/data/acpi/q35/FACP.slic differ
+diff --git a/tests/data/acpi/q35/SLIC.slic b/tests/data/acpi/q35/SLIC.slic
+new file mode 100644
+index 0000000000..e69de29bb2
+diff --git a/tests/qtest/bios-tables-test-allowed-diff.h b/tests/qtest/bios-tables-test-allowed-diff.h
+index dfb8523c8b..49dbf8fa3e 100644
+--- a/tests/qtest/bios-tables-test-allowed-diff.h
++++ b/tests/qtest/bios-tables-test-allowed-diff.h
+@@ -1 +1,3 @@
+ /* List of comma-separated changed AML files to ignore */
++"tests/data/acpi/q35/FACP.slic",
++"tests/data/acpi/q35/SLIC.slic",
+
+commit cb913395d76f8fdfd7f1d0c8ea77d4710821bbd3
+Author: Igor Mammedov <imammedo@redhat.com>
+Date:   Mon Dec 27 14:31:19 2021 -0500
+
+    tests: acpi: add SLIC table test
+    
+    When user uses '-acpitable' to add SLIC table, some ACPI
+    tables (FADT) will change its 'Oem ID'/'Oem Table ID' fields to
+    match that of SLIC. Test makes sure thati QEMU handles
+    those fields correctly when SLIC table is added with
+    '-acpitable' option.
+    
+    Signed-off-by: Igor Mammedov <imammedo@redhat.com>
+
+diff --git a/tests/qtest/bios-tables-test.c b/tests/qtest/bios-tables-test.c
+index 258874167e..ae7ef13ec7 100644
+--- a/tests/qtest/bios-tables-test.c
++++ b/tests/qtest/bios-tables-test.c
+@@ -1567,6 +1567,19 @@ static void test_acpi_oem_fields_virt(void)
+     g_free(args);
+ }
+
++static void test_acpi_q35_slic(void)
++{
++    test_data data = {
++        .machine = MACHINE_Q35,
++        .variant = ".slic",
++    };
++
++    test_acpi_one("-acpitable sig=SLIC,oem_id='CRASH ',oem_table_id='ME',"
++                  "oem_rev=00002210,asl_compiler_id='qemu',"
++                  "asl_compiler_rev=00000000,data=/dev/null",
++                  &data);
++    free_test_data(&data);
++}
+
+ int main(int argc, char *argv[])
+ {
+@@ -1639,6 +1652,7 @@ int main(int argc, char *argv[])
+             qtest_add_func("acpi/q35/kvm/xapic", test_acpi_q35_kvm_xapic);
+             qtest_add_func("acpi/q35/kvm/dmar", test_acpi_q35_kvm_dmar);
+         }
++        qtest_add_func("acpi/q35/slic", test_acpi_q35_slic);
+     } else if (strcmp(arch, "aarch64") == 0) {
+         if (has_tcg) {
+             qtest_add_func("acpi/virt", test_acpi_virt_tcg);
+
+commit ffba261306370e0ad8506401b104be5fa4749ade
+Author: Igor Mammedov <imammedo@redhat.com>
+Date:   Mon Dec 27 14:31:20 2021 -0500
+
+    tests: acpi: SLIC: update expected blobs
+    
+    Signed-off-by: Igor Mammedov <imammedo@redhat.com>
+
+diff --git a/tests/data/acpi/q35/FACP.slic b/tests/data/acpi/q35/FACP.slic
+index f6a864cc86..891fd4b784 100644
+Binary files a/tests/data/acpi/q35/FACP.slic and b/tests/data/acpi/q35/FACP.slic differ
+diff --git a/tests/data/acpi/q35/SLIC.slic b/tests/data/acpi/q35/SLIC.slic
+index e69de29bb2..fd26592e24 100644
+Binary files a/tests/data/acpi/q35/SLIC.slic and b/tests/data/acpi/q35/SLIC.slic differ
+diff --git a/tests/qtest/bios-tables-test-allowed-diff.h b/tests/qtest/bios-tables-test-allowed-diff.h
+index 49dbf8fa3e..dfb8523c8b 100644
+--- a/tests/qtest/bios-tables-test-allowed-diff.h
++++ b/tests/qtest/bios-tables-test-allowed-diff.h
+@@ -1,3 +1 @@
+ /* List of comma-separated changed AML files to ignore */
+-"tests/data/acpi/q35/FACP.slic",
+-"tests/data/acpi/q35/SLIC.slic",