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From: Sean Christopherson <seanjc@google.com>
To: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	 Dave Hansen <dave.hansen@linux.intel.com>,
	x86@kernel.org,  Sean Christopherson <seanjc@google.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	 Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	 Thomas Zimmermann <tzimmermann@suse.de>,
	David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	 dri-devel@lists.freedesktop.org,
	Zheyun Shen <szy0127@sjtu.edu.cn>,
	 Tom Lendacky <thomas.lendacky@amd.com>,
	Kevin Loughlin <kevinloughlin@google.com>,
	 Kai Huang <kai.huang@intel.com>,
	Mingwei Zhang <mizhang@google.com>
Subject: [PATCH v2 6/8] KVM: x86: Use wbinvd_on_cpu() instead of an open-coded equivalent
Date: Fri, 16 May 2025 14:28:31 -0700	[thread overview]
Message-ID: <20250516212833.2544737-7-seanjc@google.com> (raw)
In-Reply-To: <20250516212833.2544737-1-seanjc@google.com>

Use wbinvd_on_cpu() to target a single CPU instead of open-coding an
equivalent.  In addition to deduplicating code, this will allow removing
KVM's wbinvd_ipi() once the other usage is gone.

No functional change intended.

Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kvm/x86.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f9f798f286ce..b8b72e8dac6e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5009,8 +5009,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 		if (kvm_x86_call(has_wbinvd_exit)())
 			cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask);
 		else if (vcpu->cpu != -1 && vcpu->cpu != cpu)
-			smp_call_function_single(vcpu->cpu,
-					wbinvd_ipi, NULL, 1);
+			wbinvd_on_cpu(vcpu->cpu);
 	}
 
 	kvm_x86_call(vcpu_load)(vcpu, cpu);
-- 
2.49.0.1112.g889b7c5bd8-goog


  parent reply	other threads:[~2025-05-16 21:30 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-05-16 21:28 [PATCH v2 0/8] x86, KVM: Optimize SEV cache flushing Sean Christopherson
2025-05-16 21:28 ` [PATCH v2 1/8] KVM: SVM: Remove wbinvd in sev_vm_destroy() Sean Christopherson
2025-05-16 21:28 ` [PATCH v2 2/8] drm/gpu: Remove dead checks on wbinvd_on_all_cpus()'s return value Sean Christopherson
2025-05-16 21:28 ` [PATCH v2 3/8] x86, lib: Drop the unused return value from wbinvd_on_all_cpus() Sean Christopherson
2025-05-17  6:47   ` Ingo Molnar
2025-05-16 21:28 ` [PATCH v2 4/8] x86, lib: Add WBNOINVD helper functions Sean Christopherson
2025-05-17  6:47   ` Ingo Molnar
2025-05-19 16:30     ` Sean Christopherson
2025-05-20  9:41       ` Ingo Molnar
2025-05-16 21:28 ` [PATCH v2 5/8] KVM: SEV: Prefer WBNOINVD over WBINVD for cache maintenance efficiency Sean Christopherson
2025-05-18  9:52   ` Francesco Lavra
2025-05-16 21:28 ` Sean Christopherson [this message]
2025-05-16 21:28 ` [PATCH v2 7/8] x86, lib: Add wbinvd and wbnoinvd helpers to target multiple CPUs Sean Christopherson
2025-05-17  7:01   ` Ingo Molnar
2025-05-19 16:02     ` Sean Christopherson
2025-05-19 16:34     ` Sean Christopherson
2025-05-20  9:42       ` Ingo Molnar
2025-05-16 21:28 ` [PATCH v2 8/8] KVM: SVM: Flush cache only on CPUs running SEV guest Sean Christopherson
2025-05-19 17:48   ` Tom Lendacky

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