Backport for 2.38:
commit ced101ed9d3b7cfd12d97ef24940cb00b8658c81
Author: Sajan Karumanchi <sajan.karuman...@amd.com>
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 <premachandra.malla...@amd.com>
Tested-by: Florian Weimer <fwei...@redhat.com>
Backport for 2.37:
commit 9d5c6e27ed6af40339f0be28f0c613fae4179c46
Author: Sajan Karumanchi <sajan.karuman...@amd.com>
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 <premachandra.malla...@amd.com>
Tested-by: Florian Weimer <fwei...@redhat.com>
(cherry picked from commit dcad5c8578130dec7f35fd5b0885304b59f9f543)
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https://bugs.launchpad.net/bugs/2016252
Title:
qemu-system-x86_64 crashes inside nested VM
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