From nobody Fri Dec 19 20:54:27 2025 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3B41826656F for ; Mon, 24 Mar 2025 17:33:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742837587; cv=none; b=I3MZ/gtD3hFdnsRbQt5KeziYrwSIDtO3v6Q5RaE9QvKt+gtb070nx0Berjr0YUS519XsysdU90HbXOs5MIx0Rfu+AUEN0fXTRuchdTN66Ef6lMZVqkB59sVFYnG+KU2w3gi/gxFL7yE8G5UW1nNsMgBUB+A5D7X9fnpF0xcq1K4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742837587; c=relaxed/simple; bh=uSsfP2iUGKZAko91Ue51RA6jOzSPWpQLs2FQJIUEdN4=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=Dhr0Jf2NAeGRYSwkOTPrM4E7eeKH6FhqDL1T+QCgGBiLin63sZEO8qxwlHOmImtSLfhS9YI5urEaCOiyS2XMsVqEo9dcghH+3VEFD7pR3KvY1vDCV4VeaG86o/sV/qCTzSnaMu7RtqnWJPwcgx9cQxY+d7PYDFZn6ItcfzuULas= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--mizhang.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=QiwPhNRp; arc=none smtp.client-ip=209.85.216.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--mizhang.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="QiwPhNRp" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-2ff82dd6de0so6225367a91.0 for ; Mon, 24 Mar 2025 10:33:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1742837585; x=1743442385; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=+Kc+hvgN5vKkqFOj791yq3cFJDYHXw2rm6mE1S/YN0o=; b=QiwPhNRpfFfPtMxFJTrLQn4AXDUbhzYl8mvd6+DFh3bfrKshKFgQR7MT+Xat3OoAeL 1lX1/U71RATrvgge7A8e93voA43N9Fp8hISfJInqFew1m3V4wnEHlmueEihajOekSMoi HnWm2oUm1QtS4uOePTn7v3sVfn45xRhwjLXGTry3Lkc/jwPw7UXrtKX1CSZ/SIJ/q123 /5A954VGj22zF6+r+QB7ek0tE81yXM1APDEURJdIZKJ+JjhlnNJtzcQLR4gYFwiRHTlk +HV5G8C5VDghfYnAi8gLQ4ZpPg7hcbaCb7WrHnvnwfasNOFyZxBqp+iS4sgV7nbZtMI2 STPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1742837585; x=1743442385; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=+Kc+hvgN5vKkqFOj791yq3cFJDYHXw2rm6mE1S/YN0o=; b=W0YELE3gsgaHveZRM6YROiR8RfdtivNkEjYy+oy+MpW+Ikaft+xya0cuMMCeUtvADf mqkrmXm5wQCUP1nX0O3VALGAPd8t9Ls0qWvAhdHeqaru3N+1cgcUxQRA+frohWGC5KPd 1wJ4lEpkLfgAfhF2uIvLTbgagpLsocdGiMAKPUeXVfjYzrbHjBJvtcOsD6sYjLcCDsp1 DX8lRWxT9UPSEHFe+AIq5AQDR6K00hK1wcL2ZnS3hqtfOUn4kN+c1WRQ91NbEPjGmJJG itaKc0n1+h1Gw/g0xQYHDPwzzwJF505mcLjIRnLRhXRdnZ/+stER4OsC8sX+Ys/g+pRH lqgQ== X-Forwarded-Encrypted: i=1; AJvYcCWtvQTbQw1W+XL48taexqvsVKeDF7MNEuJr4UeFyDFwRN6uAQu+gukFgEhjd/b3A2x8UL1LNcAVnj/fnEw=@vger.kernel.org X-Gm-Message-State: AOJu0YxVC76GzYgB+ED8mzA3CQRC1xgja/DZjuHxRu1GvcbikZ0aNFNn u79ifIiS/I3MTftWxQbqJh+7FgX/TD5gMFofnXqU64CPIyujZ4OdEEs2L6u+wLJFM3I4rnmeboI K8iK1ag== X-Google-Smtp-Source: AGHT+IGd6varlGCeyx7AQp9DEz54Ir4tI3Fr0sEZAmWQE+3Tt+2k7Q201qPQY7a5j8n0L8adjjUOD9PBqS3+ X-Received: from pjbsc2.prod.google.com ([2002:a17:90b:5102:b0:2ff:611c:bae8]) (user=mizhang job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:4c81:b0:301:cba1:7ada with SMTP id 98e67ed59e1d1-3030fe56378mr20286185a91.1.1742837584784; Mon, 24 Mar 2025 10:33:04 -0700 (PDT) Reply-To: Mingwei Zhang Date: Mon, 24 Mar 2025 17:30:48 +0000 In-Reply-To: <20250324173121.1275209-1-mizhang@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250324173121.1275209-1-mizhang@google.com> X-Mailer: git-send-email 2.49.0.395.g12beb8f557-goog Message-ID: <20250324173121.1275209-9-mizhang@google.com> Subject: [PATCH v4 08/38] KVM: x86/pmu: Register KVM_GUEST_PMI_VECTOR handler From: Mingwei Zhang To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Sean Christopherson , Paolo Bonzini Cc: Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Liang@google.com, Kan , "H. Peter Anvin" , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, Mingwei Zhang , Yongwei Ma , Xiong Zhang , Dapeng Mi , Jim Mattson , Sandipan Das , Zide Chen , Eranian Stephane , Das Sandipan , Shukla Manali , Nikunj Dadhania Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Xiong Zhang Add function to register/unregister guest KVM PMI handler at KVM module initialization and destroy. This allows the host PMU with passthough capability enabled can switch PMI handler at PMU context switch. Signed-off-by: Xiong Zhang Tested-by: Yongwei Ma Signed-off-by: Mingwei Zhang --- arch/x86/kvm/x86.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 02159c967d29..72995952978a 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -13984,6 +13984,16 @@ int kvm_sev_es_string_io(struct kvm_vcpu *vcpu, un= signed int size, } EXPORT_SYMBOL_GPL(kvm_sev_es_string_io); =20 +static void kvm_handle_guest_pmi(void) +{ + struct kvm_vcpu *vcpu =3D kvm_get_running_vcpu(); + + if (WARN_ON_ONCE(!vcpu)) + return; + + kvm_make_request(KVM_REQ_PMI, vcpu); +} + EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_entry); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio); @@ -14021,12 +14031,14 @@ static int __init kvm_x86_init(void) =20 kvm_mmu_x86_module_init(); mitigate_smt_rsb &=3D boot_cpu_has_bug(X86_BUG_SMT_RSB) && cpu_smt_possib= le(); + x86_set_kvm_irq_handler(KVM_GUEST_PMI_VECTOR, kvm_handle_guest_pmi); return 0; } module_init(kvm_x86_init); =20 static void __exit kvm_x86_exit(void) { + x86_set_kvm_irq_handler(KVM_GUEST_PMI_VECTOR, NULL); WARN_ON_ONCE(static_branch_unlikely(&kvm_has_noapic_vcpu)); } module_exit(kvm_x86_exit); --=20 2.49.0.395.g12beb8f557-goog