From: Andrea Arcangeli <aarcange@redhat.com>
To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Sean Christopherson <sean.j.christopherson@intel.com>
Subject: [PATCH 06/14] KVM: monolithic: x86: remove __exit section prefix from machine_unsetup
Date: Sat, 28 Sep 2019 13:23:15 -0400 [thread overview]
Message-ID: <20190928172323.14663-7-aarcange@redhat.com> (raw)
In-Reply-To: <20190928172323.14663-1-aarcange@redhat.com>
Adjusts the section prefixes of some KVM x86 code function because
with the monolithic KVM model the section checker can now do a more
accurate static analysis at build time and it found a potentially
kernel crashing bug. This also allows to build without
CONFIG_SECTION_MISMATCH_WARN_ONLY=n.
The __exit removed from machine_unsetup is because
kvm_arch_hardware_unsetup() is called by kvm_init() which is in the
__init section. It's not allowed to call a function located in the
__exit section and dropped during the kernel link from the __init
section or the kernel will crash if that call is made.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
---
arch/x86/include/asm/kvm_host.h | 4 ++--
arch/x86/kvm/svm.c | 2 +-
arch/x86/kvm/vmx/vmx.c | 2 +-
3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 47eeb92d4b4a..0ae65148e5ed 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1008,7 +1008,7 @@ extern int kvm_x86_hardware_enable(void);
extern void kvm_x86_hardware_disable(void);
extern __init int kvm_x86_check_processor_compatibility(void);
extern __init int kvm_x86_hardware_setup(void);
-extern __exit void kvm_x86_hardware_unsetup(void);
+extern void kvm_x86_hardware_unsetup(void);
extern bool kvm_x86_cpu_has_accelerated_tpr(void);
extern bool kvm_x86_has_emulated_msr(int index);
extern void kvm_x86_cpuid_update(struct kvm_vcpu *vcpu);
@@ -1199,7 +1199,7 @@ struct kvm_x86_ops {
void (*hardware_disable)(void);
int (*check_processor_compatibility)(void);/* __init */
int (*hardware_setup)(void); /* __init */
- void (*hardware_unsetup)(void); /* __exit */
+ void (*hardware_unsetup)(void);
bool (*cpu_has_accelerated_tpr)(void);
bool (*has_emulated_msr)(int index);
void (*cpuid_update)(struct kvm_vcpu *vcpu);
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index aa8c0efdc441..057ba1f8d7b3 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1405,7 +1405,7 @@ __init int kvm_x86_hardware_setup(void)
return r;
}
-__exit void kvm_x86_hardware_unsetup(void)
+void kvm_x86_hardware_unsetup(void)
{
int cpu;
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index aad44e62b20a..2ae162eb082e 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7645,7 +7645,7 @@ __init int kvm_x86_hardware_setup(void)
return r;
}
-__exit void kvm_x86_hardware_unsetup(void)
+void kvm_x86_hardware_unsetup(void)
{
if (nested)
nested_vmx_hardware_unsetup();
next prev parent reply other threads:[~2019-09-28 17:24 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-28 17:23 [PATCH 00/14] KVM monolithic v2 Andrea Arcangeli
2019-09-28 17:23 ` [PATCH 01/14] KVM: monolithic: x86: remove kvm.ko Andrea Arcangeli
2019-10-15 1:31 ` Sean Christopherson
2019-10-15 3:18 ` Sean Christopherson
2019-10-15 8:32 ` Paolo Bonzini
2019-09-28 17:23 ` [PATCH 02/14] KVM: monolithic: x86: disable linking vmx and svm at the same time into the kernel Andrea Arcangeli
2019-10-15 3:16 ` Sean Christopherson
2019-10-15 8:21 ` Paolo Bonzini
2019-10-15 15:23 ` Sean Christopherson
2019-09-28 17:23 ` [PATCH 04/14] KVM: monolithic: x86: handle the request_immediate_exit variation Andrea Arcangeli
2019-09-28 17:23 ` [PATCH 05/14] KVM: monolithic: add more section prefixes in the KVM common code Andrea Arcangeli
2019-09-28 17:23 ` Andrea Arcangeli [this message]
2019-09-28 17:23 ` [PATCH 07/14] KVM: monolithic: x86: remove __init section prefix from kvm_x86_cpu_has_kvm_support Andrea Arcangeli
2019-09-28 17:23 ` [PATCH 08/14] KVM: monolithic: x86: remove exports Andrea Arcangeli
2019-09-28 17:23 ` [PATCH 09/14] KVM: monolithic: remove exports from KVM common code Andrea Arcangeli
2019-09-28 17:23 ` [PATCH 10/14] KVM: monolithic: x86: drop the kvm_pmu_ops structure Andrea Arcangeli
2019-09-28 17:23 ` [PATCH 11/14] KVM: x86: optimize more exit handlers in vmx.c Andrea Arcangeli
2019-09-28 17:23 ` [PATCH 12/14] KVM: retpolines: x86: eliminate retpoline from vmx.c exit handlers Andrea Arcangeli
2019-10-15 8:28 ` Paolo Bonzini
2019-10-15 16:49 ` Andrea Arcangeli
2019-10-15 19:46 ` Paolo Bonzini
2019-10-15 20:35 ` Andrea Arcangeli
2019-10-15 22:22 ` Paolo Bonzini
2019-10-15 23:42 ` Andrea Arcangeli
2019-10-16 7:07 ` Paolo Bonzini
2019-10-16 16:50 ` Andrea Arcangeli
2019-10-16 17:01 ` Paolo Bonzini
2019-09-28 17:23 ` [PATCH 13/14] KVM: retpolines: x86: eliminate retpoline from svm.c " Andrea Arcangeli
2019-09-28 17:23 ` [PATCH 14/14] x86: retpolines: eliminate retpoline from msr event handlers Andrea Arcangeli
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