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From 766a7ab6a7ebb9e819f6ec9a9b109ec4659388d4 Mon Sep 17 00:00:00 2001
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From: Eduardo Habkost <ehabkost@redhat.com>
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Date: Thu, 9 May 2019 23:21:08 +0100
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Subject: [PATCH 2/2] i386: Disable OSPKE on CPU model definitions
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RH-Author: Eduardo Habkost <ehabkost@redhat.com>
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Message-id: <20190509232108.25675-3-ehabkost@redhat.com>
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Patchwork-id: 87254
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O-Subject: [RHEL-8.1.0 qemu-kvm PATCH 2/2] i386: Disable OSPKE on CPU model definitions
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Bugzilla: 1561761
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
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RH-Acked-by: Danilo de Paula <ddepaula@redhat.com>
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Currently, the Cascadelake-Server, Icelake-Client, and
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Icelake-Server are always generating the following warning:
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qemu-system-x86_64: warning: \
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host doesn't support requested feature: CPUID.07H:ECX [bit 4]
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This happens because OSPKE was never returned by
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GET_SUPPORTED_CPUID or x86_cpu_get_supported_feature_word().
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OSPKE is a runtime flag automatically set by the KVM module or by
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TCG code, was always cleared by x86_cpu_filter_features(), and
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was not supposed to appear on the CPU model table.
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Remove the OSPKE flag from the CPU model table entries, to avoid
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the bogus warning and avoid returning invalid feature data on
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query-cpu-* QMP commands. As OSPKE was always cleared by
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x86_cpu_filter_features(), this won't have any guest-visible
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impact.
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Include a test case that should detect the problem if we introduce
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a similar bug again.
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Fixes: c7a88b52f62b ("i386: Add new model of Cascadelake-Server")
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Fixes: 8a11c62da914 ("i386: Add new CPU model Icelake-{Server,Client}")
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Cc: Tao Xu <tao3.xu@intel.com>
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Cc: Robert Hoo <robert.hu@linux.intel.com>
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Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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Message-Id: <20190319200515.14999-1-ehabkost@redhat.com>
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Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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(cherry picked from commit bb4928c7cafe50ab2137a0034e350ef1bfa044d9)
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Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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target/i386/cpu.c | 4 ++--
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tests/acceptance/cpu_queries.py | 33 +++++++++++++++++++++++++++++++++
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2 files changed, 35 insertions(+), 2 deletions(-)
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create mode 100644 tests/acceptance/cpu_queries.py
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diff --git a/target/i386/cpu.c b/target/i386/cpu.c
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index c56d7e7..8ff6c38 100644
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--- a/target/i386/cpu.c
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+++ b/target/i386/cpu.c
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@@ -2518,7 +2518,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
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CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_MPX,
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.features[FEAT_7_0_ECX] =
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CPUID_7_0_ECX_VBMI | CPUID_7_0_ECX_UMIP | CPUID_7_0_ECX_PKU |
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- CPUID_7_0_ECX_OSPKE | CPUID_7_0_ECX_VBMI2 | CPUID_7_0_ECX_GFNI |
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+ CPUID_7_0_ECX_VBMI2 | CPUID_7_0_ECX_GFNI |
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CPUID_7_0_ECX_VAES | CPUID_7_0_ECX_VPCLMULQDQ |
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CPUID_7_0_ECX_AVX512VNNI | CPUID_7_0_ECX_AVX512BITALG |
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CPUID_7_0_ECX_AVX512_VPOPCNTDQ,
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@@ -2576,7 +2576,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
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CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT,
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.features[FEAT_7_0_ECX] =
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CPUID_7_0_ECX_VBMI | CPUID_7_0_ECX_UMIP | CPUID_7_0_ECX_PKU |
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- CPUID_7_0_ECX_OSPKE | CPUID_7_0_ECX_VBMI2 | CPUID_7_0_ECX_GFNI |
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+ CPUID_7_0_ECX_VBMI2 | CPUID_7_0_ECX_GFNI |
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CPUID_7_0_ECX_VAES | CPUID_7_0_ECX_VPCLMULQDQ |
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CPUID_7_0_ECX_AVX512VNNI | CPUID_7_0_ECX_AVX512BITALG |
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CPUID_7_0_ECX_AVX512_VPOPCNTDQ | CPUID_7_0_ECX_LA57,
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diff --git a/tests/acceptance/cpu_queries.py b/tests/acceptance/cpu_queries.py
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new file mode 100644
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index 0000000..e71edec
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--- /dev/null
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+++ b/tests/acceptance/cpu_queries.py
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@@ -0,0 +1,33 @@
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+# Sanity check of query-cpu-* results
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+#
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+# Copyright (c) 2019 Red Hat, Inc.
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+#
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+# Author:
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+# Eduardo Habkost <ehabkost@redhat.com>
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+#
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+# This work is licensed under the terms of the GNU GPL, version 2 or
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+# later. See the COPYING file in the top-level directory.
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+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+import logging
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+
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+from avocado_qemu import Test
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+class QueryCPUModelExpansion(Test):
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+ """
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ Run query-cpu-model-expansion for each CPU model, and validate results
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ """
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+
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+ def test(self):
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+ self.vm.set_machine('none')
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ self.vm.add_args('-S')
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+ self.vm.launch()
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+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ cpus = self.vm.command('query-cpu-definitions')
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ for c in cpus:
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ print(repr(c))
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ self.assertNotIn('', c['unavailable-features'], c['name'])
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+
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ for c in cpus:
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+ model = {'name': c['name']}
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+ e = self.vm.command('query-cpu-model-expansion', model=model, type='full')
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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+ self.assertEquals(e['model']['name'], c['name'])
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
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--
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1.8.3.1
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