linux-kernel - [PATCH 5/5] KVM: cpuid: remove has_leaf_count from struct kvm_cpuid

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Date:   Thu,  4 Jul 2019 16:07:15 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     jing2.liu@...ux.intel.com
Subject: [PATCH 5/5] KVM: cpuid: remove has_leaf_count from struct kvm_cpuid_param

The has_leaf_count member was originally added for KVM's paravirtualization
CPUID leaves.  However, since then the leaf count _has_ been added to those
leaves as well, so we can drop that special case.

Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/x86/kvm/cpuid.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index d403695f2f3b..243613bf5978 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -791,7 +791,6 @@ static int do_cpuid_func(struct kvm_cpuid_entry2 *entry, u32 func,
 
 struct kvm_cpuid_param {
 	u32 func;
-	bool has_leaf_count;
 	bool (*qualifier)(const struct kvm_cpuid_param *param);
 };
 
@@ -835,11 +834,10 @@ int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,
 	int limit, nent = 0, r = -E2BIG, i;
 	u32 func;
 	static const struct kvm_cpuid_param param[] = {
-		{ .func = 0, .has_leaf_count = true },
-		{ .func = 0x80000000, .has_leaf_count = true },
-		{ .func = 0xC0000000, .qualifier = is_centaur_cpu, .has_leaf_count = true },
+		{ .func = 0 },
+		{ .func = 0x80000000 },
+		{ .func = 0xC0000000, .qualifier = is_centaur_cpu },
 		{ .func = KVM_CPUID_SIGNATURE },
-		{ .func = KVM_CPUID_FEATURES },
 	};
 
 	if (cpuid->nent < 1)
@@ -869,9 +867,6 @@ int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,
 		if (r)
 			goto out_free;
 
-		if (!ent->has_leaf_count)
-			continue;
-
 		limit = cpuid_entries[nent - 1].eax;
 		for (func = ent->func + 1; func <= limit && nent < cpuid->nent && r == 0; ++func)
 			r = do_cpuid_func(&cpuid_entries[nent], func,
-- 
2.21.0