From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: bsd@redhat.com, rkrcmar@redhat.com
Subject: [RFC PATCH 1/2] KVM: x86: always use "acknowledge interrupt on exit"
Date: Thu, 16 Jun 2016 10:21:36 +0200 [thread overview]
Message-ID: <1466065297-4644-2-git-send-email-pbonzini@redhat.com> (raw)
In-Reply-To: <1466065297-4644-1-git-send-email-pbonzini@redhat.com>
This is necessary to simplify handle_external_intr in the next patch.
It means that nested KVM will require 3.16 on the host (or 3.17 if you
have APICv enabled).
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/kvm/vmx.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index e185649fb8b7..4e9657730bf6 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3362,12 +3362,12 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
vmx_capability.ept, vmx_capability.vpid);
}
- min = VM_EXIT_SAVE_DEBUG_CONTROLS;
+ min = VM_EXIT_SAVE_DEBUG_CONTROLS | VM_EXIT_ACK_INTR_ON_EXIT;
#ifdef CONFIG_X86_64
min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
#endif
opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT |
- VM_EXIT_ACK_INTR_ON_EXIT | VM_EXIT_CLEAR_BNDCFGS;
+ VM_EXIT_CLEAR_BNDCFGS;
if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS,
&_vmexit_control) < 0)
return -EIO;
@@ -3380,8 +3380,7 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
return -EIO;
if (!(_cpu_based_2nd_exec_control &
- SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY) ||
- !(_vmexit_control & VM_EXIT_ACK_INTR_ON_EXIT))
+ SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY))
_pin_based_exec_control &= ~PIN_BASED_POSTED_INTR;
min = VM_ENTRY_LOAD_DEBUG_CONTROLS;
--
1.8.3.1
next prev parent reply other threads:[~2016-06-16 8:22 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-16 8:21 [RFC PATCH 0/2] KVM: x86: guest exit microoptimization Paolo Bonzini
2016-06-16 8:21 ` Paolo Bonzini [this message]
2016-06-16 21:53 ` [RFC PATCH 1/2] KVM: x86: always use "acknowledge interrupt on exit" Bandan Das
2016-06-16 8:21 ` [RFC PATCH 2/2] KVM: x86: use __kvm_guest_exit Paolo Bonzini
2016-06-16 16:43 ` David Matlack
2016-06-16 16:47 ` Paolo Bonzini
2016-06-16 17:03 ` David Matlack
2016-06-16 17:21 ` Paolo Bonzini
2016-06-16 22:01 ` Bandan Das
2016-06-17 5:20 ` Paolo Bonzini
2016-07-01 16:45 ` [RFC PATCH 0/2] KVM: x86: guest exit microoptimization Paolo Bonzini
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