linux-kernel - Re: [RFC PATCH 00/18] KVM: x86: CPU isolation and direct interrupts handling by guests

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Date:	Wed, 04 Jul 2012 18:33:35 +0900
From:	Tomoki Sekiyama <tomoki.sekiyama.qu@...achi.com>
To:	kvm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org,
	yrl.pp-manager.tt@...achi.com
Subject: Re: [RFC PATCH 00/18] KVM: x86: CPU isolation and direct interrupts
 handling by guests

Hello,

There were some missing pieces for trying this patch series.

Firstly, the patch is for v3.5-rc4, but that version has an issue
that it cannot passthrough PCI devices because of genirq changes.
A patch to avoid this issue is available at
https://lkml.org/lkml/2012/6/1/261 .

Secondly, to successfully build the patched qemu-kvm, you need the
following additional definitions to qemu-kvm's header files for KVM.

diff -u -r qemu-kvm-0.15.1/linux-headers/linux/kvm.h qemu-kvm-0.15.1-test/linux-headers/linux/kvm.h
--- qemu-kvm-0.15.1/linux-headers/linux/kvm.h	2011-10-19 22:54:48.000000000 +0900
+++ qemu-kvm-0.15.1-test/linux-headers/linux/kvm.h	2012-06-25 21:21:20.273488167 +0900
@@ -544,6 +544,7 @@
 #define KVM_CAP_TSC_CONTROL 60
 #define KVM_CAP_GET_TSC_KHZ 61
 #define KVM_CAP_PPC_BOOKE_SREGS 62
+#define KVM_CAP_SLAVE_CPU 80
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
@@ -746,6 +747,9 @@
 /* Available with KVM_CAP_XCRS */
 #define KVM_GET_XCRS		  _IOR(KVMIO,  0xa6, struct kvm_xcrs)
 #define KVM_SET_XCRS		  _IOW(KVMIO,  0xa7, struct kvm_xcrs)
+/* Available with KVM_CAP_SLAVE_CPU */
+#define KVM_GET_SLAVE_CPU         _IO(KVMIO,  0xae)
+#define KVM_SET_SLAVE_CPU         _IO(KVMIO,  0xaf)
 
 #define KVM_DEV_ASSIGN_ENABLE_IOMMU	(1 << 0)
 


Thanks,
-- 
Tomoki Sekiyama <tomoki.sekiyama.qu@...achi.com>
Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory

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