Backport for 2.38:
commit ced101ed9d3b7cfd12d97ef24940cb00b8658c81
Author: Sajan Karumanchi <[email protected]>
Date: Tue Aug 1 15:20:55 2023 +0000
x86: Fix for cache computation on AMD legacy cpus.
Some legacy AMD CPUs and hypervisors have the _cpuid_ '0x8000_001D'
set to Zero, thus resulting in zeroed-out computed cache values.
This patch reintroduces the old way of cache computation as a
fail-safe option to handle these exceptions.
Fixed 'level4_cache_size' value through handle_amd().
Reviewed-by: Premachandra Mallappa <[email protected]>
Tested-by: Florian Weimer <[email protected]>
Backport for 2.37:
commit 9d5c6e27ed6af40339f0be28f0c613fae4179c46
Author: Sajan Karumanchi <[email protected]>
Date: Tue Aug 1 15:20:55 2023 +0000
x86: Fix for cache computation on AMD legacy cpus.
Some legacy AMD CPUs and hypervisors have the _cpuid_ '0x8000_001D'
set to Zero, thus resulting in zeroed-out computed cache values.
This patch reintroduces the old way of cache computation as a
fail-safe option to handle these exceptions.
Fixed 'level4_cache_size' value through handle_amd().
Reviewed-by: Premachandra Mallappa <[email protected]>
Tested-by: Florian Weimer <[email protected]>
(cherry picked from commit dcad5c8578130dec7f35fd5b0885304b59f9f543)
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https://bugs.launchpad.net/bugs/2016252
Title:
qemu-system-x86_64 crashes inside nested VM
Status in GLibC:
Fix Released
Status in glibc package in Ubuntu:
Fix Released
Status in qemu package in Ubuntu:
Fix Released
Status in systemd package in Ubuntu:
Invalid
Bug description:
Systemd package has autopkgtests
the upstream-2 test cases use upstream systemd testsuite, i.e. make -C
str/test/TEST-70-TPM2 setup run
it launches a nested VM to do quick tests inside it.
It appears that qemu-system-x86_64 crashes in such cases:
TEST-70-TPM2 RUN: cryptenroll/cryptsetup with TPM2 devices
+ timeout --foreground 1800 /bin/qemu-system-x86_64 -smp 4 -net none -m 1024M
-nographic -vga none -kernel /boot/vmlinuz-6.2.0-1003-lowlatency -drive
format=raw,cache=unsafe,file=/var/tmp/systemd-test.G2RH6i/tpm2.img -device
virtio-rng-pci,max-bytes=1024,period=1000 -chardev
socket,id=chrtpm,path=/tmp/tmp.cRBa43SrLC/sock -tpmdev
emulator,id=tpm0,chardev=chrtpm -device tpm-tis,tpmdev=tpm0 -initrd
/boot/initrd.img-6.2.0-1003-lowlatency -append 'root=LABEL=systemd_boot rw
raid=noautodetect rd.luks=0 loglevel=2 init=/lib/systemd/systemd console=ttyS0
SYSTEMD_UNIT_PATH=/usr/lib/systemd/tests/testdata/testsuite-70.units:/usr/lib/systemd/tests/testdata/units:
systemd.unit=testsuite.target systemd.wants=testsuite-70.service oops=panic
panic=1 softlockup_panic=1 systemd.wants=end.service'
qemu-system-x86_64: ../../util/cacheflush.c:208: init_cache_info: Assertion
`(isize & (isize - 1)) == 0' failed.
timeout: the monitored command dumped core
..//test-functions: line 377: 152120 Aborted ( set -x;
"${qemu_cmd[@]}" "${qemu_options[@]}" -append "${kernel_params[*]}" )
E: qemu failed with exit code 134
The important bit seems to be:
qemu-system-x86_64: ../../util/cacheflush.c:208: init_cache_info:
Assertion `(isize & (isize - 1)) == 0' failed.
Which is an assert inside qemu source code.
Is the systemd test suite VM setup doing something wrong, or is there
something wrong in qemu?
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