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From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>,
	"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
	Wei Huang <whuang2@amd.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH 3/3] KVM: x86: bump KVM_MAX_CPUID_ENTRIES
Date: Thu,  1 Oct 2020 15:05:41 +0200	[thread overview]
Message-ID: <20201001130541.1398392-4-vkuznets@redhat.com> (raw)
In-Reply-To: <20201001130541.1398392-1-vkuznets@redhat.com>

As vcpu->arch.cpuid_entries is now allocated dynamically, the only
remaining use for KVM_MAX_CPUID_ENTRIES is to check KVM_SET_CPUID/
KVM_SET_CPUID2 input for sanity. Since it was reported that the
current limit (80) is insufficient for some CPUs, bump
KVM_MAX_CPUID_ENTRIES and use an arbitrary value '256' as the new
limit.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.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 7d259e21ea04..f6d6df64e63a 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -133,7 +133,7 @@ static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
 #define KVM_MIN_FREE_MMU_PAGES 5
 #define KVM_REFILL_PAGES 25
-#define KVM_MAX_CPUID_ENTRIES 80
+#define KVM_MAX_CPUID_ENTRIES 256
 #define KVM_NR_FIXED_MTRR_REGION 88
 #define KVM_NR_VAR_MTRR 8
 
-- 
2.25.4


  parent reply	other threads:[~2020-10-01 13:06 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-01 13:05 [PATCH 0/3] KVM: x86: allow for more CPUID entries Vitaly Kuznetsov
2020-10-01 13:05 ` [PATCH 1/3] KVM: x86: disconnect kvm_check_cpuid() from vcpu->arch.cpuid_entries Vitaly Kuznetsov
2020-10-05 10:10   ` Maxim Levitsky
2020-10-05 11:51     ` Vitaly Kuznetsov
2020-10-05 13:06       ` Maxim Levitsky
2020-10-01 13:05 ` [PATCH 2/3] KVM: x86: allocate vcpu->arch.cpuid_entries dynamically Vitaly Kuznetsov
2020-10-05 10:11   ` Maxim Levitsky
2020-10-01 13:05 ` Vitaly Kuznetsov [this message]
2020-10-05 10:10   ` [PATCH 3/3] KVM: x86: bump KVM_MAX_CPUID_ENTRIES Maxim Levitsky

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