linux-kernel - [PATCH] KVM/x86: Increase max vcpu number to 352

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Date:   Thu, 10 Aug 2017 18:00:59 +0800
From:   Lan Tianyu <tianyu.lan@...el.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Lan Tianyu <tianyu.lan@...el.com>, pbonzini@...hat.com,
        rkrcmar@...hat.com, tglx@...utronix.de, mingo@...hat.com,
        hpa@...or.com, x86@...nel.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] KVM/x86: Increase max vcpu number to 352

Intel Xeon phi chip will support 352 logical threads. For HPC usage
case, it will create a huge VM with vcpu number as same as host cpus. This
patch is to increase max vcpu number to 352.

Signed-off-by: Lan Tianyu <tianyu.lan@...el.com>
---
 arch/x86/include/asm/kvm_host.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 87ac4fb..2cdc043 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -35,7 +35,7 @@
 #include <asm/asm.h>
 #include <asm/kvm_page_track.h>
 
-#define KVM_MAX_VCPUS 288
+#define KVM_MAX_VCPUS 352
 #define KVM_SOFT_MAX_VCPUS 240
 #define KVM_MAX_VCPU_ID 1023
 #define KVM_USER_MEM_SLOTS 509
-- 
1.8.3.1