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author | Eduardo Habkost <ehabkost@redhat.com> | 2017-06-05 12:19:27 -0300 |
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committer | Michael Roth <mdroth@linux.vnet.ibm.com> | 2017-08-03 16:01:29 -0500 |
commit | 2401d8a490e728f2a63ac7a0c875f969cd298c46 (patch) | |
tree | e1db7347f44ce2f36d2f6e7f7496baf76f759a14 /include | |
parent | 1775fe6148ae11a4e8ad6f6c2813a41e70e12f76 (diff) | |
download | qemu-2401d8a490e728f2a63ac7a0c875f969cd298c46.tar.gz |
pc: Use "min-[x]level" on compat_props
Since the automatic cpuid-level code was introduced in commit
c39c0edf9bb3b968ba95484465a50c7b19f4aa3a ("target-i386: Automatically
set level/xlevel/xlevel2 when needed"), the CPU model tables just define
the default CPUID level code (set using "min-level"). Setting
"[x]level" forces CPUID level to a specific value and disable the
automatic-level logic.
But the PC compat code was not updated and the existing "[x]level"
compat properties broke compatibility for people using features that
triggered the auto-level code. To keep previous behavior, we should set
"min-[x]level" instead of "[x]level" on compat_props.
This was not a problem for most cases, because old machine-types don't
have full-cpuid-auto-level enabled. The only common use case it broke
was the CPUID[7] auto-level code, that was already enabled since the
first CPUID[7] feature was introduced (in QEMU 1.4.0).
This causes the regression reported at:
https://bugzilla.redhat.com/show_bug.cgi?id=1454641
Change the PC compat code to use "min-[x]level" instead of "[x]level" on
compat_props, and add new test cases to ensure we don't break this
again.
Reported-by: "Guo, Zhiyi" <zhguo@redhat.com>
Fixes: c39c0edf9bb ("target-i386: Automatically set level/xlevel/xlevel2 when needed")
Cc: qemu-stable@nongnu.org
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
(cherry picked from commit 1f43571604da85c62f25f3ba6d275b1b5ea76ca2)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Diffstat (limited to 'include')
-rw-r--r-- | include/hw/i386/pc.h | 42 |
1 files changed, 21 insertions, 21 deletions
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index f278b3ae89..564486fd2a 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -558,75 +558,75 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *); .value = "off",\ },{\ .driver = "qemu64" "-" TYPE_X86_CPU,\ - .property = "level",\ + .property = "min-level",\ .value = stringify(4),\ },{\ .driver = "kvm64" "-" TYPE_X86_CPU,\ - .property = "level",\ + .property = "min-level",\ .value = stringify(5),\ },{\ .driver = "pentium3" "-" TYPE_X86_CPU,\ - .property = "level",\ + .property = "min-level",\ .value = stringify(2),\ },{\ .driver = "n270" "-" TYPE_X86_CPU,\ - .property = "level",\ + .property = "min-level",\ .value = stringify(5),\ },{\ .driver = "Conroe" "-" TYPE_X86_CPU,\ - .property = "level",\ + .property = "min-level",\ .value = stringify(4),\ },{\ .driver = "Penryn" "-" TYPE_X86_CPU,\ - .property = "level",\ + .property = "min-level",\ .value = stringify(4),\ },{\ .driver = "Nehalem" "-" TYPE_X86_CPU,\ - .property = "level",\ + .property = "min-level",\ .value = stringify(4),\ },{\ .driver = "n270" "-" TYPE_X86_CPU,\ - .property = "xlevel",\ + .property = "min-xlevel",\ .value = stringify(0x8000000a),\ },{\ .driver = "Penryn" "-" TYPE_X86_CPU,\ - .property = "xlevel",\ + .property = "min-xlevel",\ .value = stringify(0x8000000a),\ },{\ .driver = "Conroe" "-" TYPE_X86_CPU,\ - .property = "xlevel",\ + .property = "min-xlevel",\ .value = stringify(0x8000000a),\ },{\ .driver = "Nehalem" "-" TYPE_X86_CPU,\ - .property = "xlevel",\ + .property = "min-xlevel",\ .value = stringify(0x8000000a),\ },{\ .driver = "Westmere" "-" TYPE_X86_CPU,\ - .property = "xlevel",\ + .property = "min-xlevel",\ .value = stringify(0x8000000a),\ },{\ .driver = "SandyBridge" "-" TYPE_X86_CPU,\ - .property = "xlevel",\ + .property = "min-xlevel",\ .value = stringify(0x8000000a),\ },{\ .driver = "IvyBridge" "-" TYPE_X86_CPU,\ - .property = "xlevel",\ + .property = "min-xlevel",\ .value = stringify(0x8000000a),\ },{\ .driver = "Haswell" "-" TYPE_X86_CPU,\ - .property = "xlevel",\ + .property = "min-xlevel",\ .value = stringify(0x8000000a),\ },{\ .driver = "Haswell-noTSX" "-" TYPE_X86_CPU,\ - .property = "xlevel",\ + .property = "min-xlevel",\ .value = stringify(0x8000000a),\ },{\ .driver = "Broadwell" "-" TYPE_X86_CPU,\ - .property = "xlevel",\ + .property = "min-xlevel",\ .value = stringify(0x8000000a),\ },{\ .driver = "Broadwell-noTSX" "-" TYPE_X86_CPU,\ - .property = "xlevel",\ + .property = "min-xlevel",\ .value = stringify(0x8000000a),\ },{\ .driver = TYPE_X86_CPU,\ @@ -852,7 +852,7 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *); .value = stringify(2),\ },{\ .driver = "Conroe-" TYPE_X86_CPU,\ - .property = "level",\ + .property = "min-level",\ .value = stringify(2),\ },{\ .driver = "Penryn-" TYPE_X86_CPU,\ @@ -860,7 +860,7 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *); .value = stringify(2),\ },{\ .driver = "Penryn-" TYPE_X86_CPU,\ - .property = "level",\ + .property = "min-level",\ .value = stringify(2),\ },{\ .driver = "Nehalem-" TYPE_X86_CPU,\ @@ -868,7 +868,7 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *); .value = stringify(2),\ },{\ .driver = "Nehalem-" TYPE_X86_CPU,\ - .property = "level",\ + .property = "min-level",\ .value = stringify(2),\ },{\ .driver = "virtio-net-pci",\ |