From: luofei <luofei@unicloud.com>
To: <tglx@linutronix.de>, <mingo@redhat.com>, <bp@alien8.de>,
<dave.hansen@linux.intel.com>, <x86@kernel.org>
Cc: <pbonzini@redhat.com>, <seanjc@google.com>, <vkuznets@redhat.com>,
<wanpengli@tencent.com>, <jmattson@google.com>, <joro@8bytes.org>,
<hpa@zytor.com>, <kvm@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, luofei <luofei@unicloud.com>
Subject: [PATCH] KVM: x86/mmu: remove unnecessary kvm_shadow_root_allocated() check
Date: Wed, 6 Apr 2022 21:40:16 -0400 [thread overview]
Message-ID: <20220407014016.1266469-1-luofei@unicloud.com> (raw)
When we reach here, the return value of kvm_shadow_root_allocated()
has already been checked to false under kvm->slots_arch_lock.
So remove the unnecessary recheck.
Signed-off-by: luofei <luofei@unicloud.com>
---
arch/x86/kvm/mmu/mmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 8f19ea752704..1978ee527298 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -3394,7 +3394,7 @@ static int mmu_first_shadow_root_alloc(struct kvm *kvm)
* Check if anything actually needs to be allocated, e.g. all metadata
* will be allocated upfront if TDP is disabled.
*/
- if (kvm_memslots_have_rmaps(kvm) &&
+ if (!is_tdp_mmu_enabled(kvm) &&
kvm_page_track_write_tracking_enabled(kvm))
goto out_success;
--
2.27.0
next reply other threads:[~2022-04-07 2:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-07 1:40 luofei [this message]
2022-04-08 10:10 ` Paolo Bonzini
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