From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: qemu-devel@nongnu.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
Eduardo Habkost <ehabkost@redhat.com>
Subject: [PATCH RFC 12/22] i386: always fill Hyper-V CPUID feature leaves from X86CPU data
Date: Fri, 4 Sep 2020 16:54:21 +0200 [thread overview]
Message-ID: <20200904145431.196885-13-vkuznets@redhat.com> (raw)
In-Reply-To: <20200904145431.196885-1-vkuznets@redhat.com>
We have all the required data in X86CPU already and as we are about to
split hyperv_handle_properties() into hyperv_expand_features()/
hyperv_fill_cpuids() we can remove the blind copy. The functional change
is that QEMU won't pass CPUID leaves it doesn't currently know about
to the guest but arguably this is a good change.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
target/i386/kvm.c | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 87b83a2aa2cb..b7f0e200a75f 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -1221,9 +1221,6 @@ static int hyperv_handle_properties(CPUState *cs,
}
if (cpu->hyperv_passthrough) {
- memcpy(cpuid_ent, &cpuid->entries[0],
- cpuid->nent * sizeof(cpuid->entries[0]));
-
c = cpuid_find_entry(cpuid, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, 0);
if (c) {
cpu->hyperv_vendor_id[0] = c->ebx;
@@ -1325,12 +1322,6 @@ static int hyperv_handle_properties(CPUState *cs,
goto free;
}
- if (cpu->hyperv_passthrough) {
- /* We already copied all feature words from KVM as is */
- r = cpuid->nent;
- goto free;
- }
-
c = &cpuid_ent[cpuid_i++];
c->function = HV_CPUID_VENDOR_AND_MAX_FUNCTIONS;
c->eax = hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS) ?
--
2.25.4
next prev parent reply other threads:[~2020-09-04 15:03 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-04 14:54 [PATCH RFC 00/22] i386: KVM: expand Hyper-V features early Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 01/22] WIP: update linux/headers Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 02/22] i386: drop x86_cpu_get_supported_feature_word() forward declaration Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 03/22] i386: move hyperv_vendor_id initialization to x86_cpu_realizefn() Vitaly Kuznetsov
2020-09-18 22:14 ` Eduardo Habkost
2020-09-22 10:23 ` Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 04/22] i386: move hyperv_interface_id " Vitaly Kuznetsov
2020-09-18 22:23 ` Eduardo Habkost
2020-09-04 14:54 ` [PATCH RFC 05/22] i386: move hyperv_version_id " Vitaly Kuznetsov
2020-09-18 22:15 ` Eduardo Habkost
2020-09-04 14:54 ` [PATCH RFC 06/22] i386: move hyperv_limits " Vitaly Kuznetsov
2020-09-18 22:16 ` Eduardo Habkost
2020-09-04 14:54 ` [PATCH RFC 07/22] i386: fill in FEAT_HYPERV_EDX from edx instead of eax Vitaly Kuznetsov
2020-09-18 22:21 ` Eduardo Habkost
2020-09-04 14:54 ` [PATCH RFC 08/22] i386: invert hyperv_spinlock_attempts setting logic with hv_passthrough Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 09/22] i386: add reserved FEAT_HYPERV_ECX CPUID leaf Vitaly Kuznetsov
2020-09-18 22:25 ` Eduardo Habkost
2020-09-22 10:27 ` Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 10/22] i386: add reserved FEAT_HV_RECOMM_ECX/FEAT_HV_RECOMM_EDX CPUID leaves Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 11/22] i386: add reserved FEAT_HV_NESTED_EBX/ECX/EDX " Vitaly Kuznetsov
2020-09-04 14:54 ` Vitaly Kuznetsov [this message]
2020-09-18 22:32 ` [PATCH RFC 12/22] i386: always fill Hyper-V CPUID feature leaves from X86CPU data Eduardo Habkost
2020-09-22 10:30 ` Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 13/22] i386: split hyperv_handle_properties() into hyperv_expand_features()/hyperv_fill_cpuids() Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 14/22] i386: move eVMCS enablement to hyperv_init_vcpu() Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 15/22] i386: switch hyperv_expand_features() to using error_setg() Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 16/22] i386: make hyperv_expand_features() return void Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 17/22] i386: adjust the expected KVM_GET_SUPPORTED_HV_CPUID array size Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 18/22] i386: prefer system KVM_GET_SUPPORTED_HV_CPUID ioctl over vCPU's one Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 19/22] i386: prepare hyperv_expand_features() to be called at CPU feature expansion time Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 20/22] i386: use global kvm_state in hyperv_enabled() check Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 21/22] i386: record if Hyper-V features were already expanded Vitaly Kuznetsov
2020-09-04 14:54 ` [PATCH RFC 22/22] i386: expand Hyper-V features early Vitaly Kuznetsov
2020-09-18 22:38 ` Eduardo Habkost
2020-09-22 10:33 ` Vitaly Kuznetsov
2020-09-18 22:47 ` Eduardo Habkost
2020-09-22 10:37 ` Vitaly Kuznetsov
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