From nobody Thu Nov 28 20:43:41 2024 Received: from mail-pg1-f201.google.com (mail-pg1-f201.google.com [209.85.215.201]) (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 E39E6157E82 for ; Thu, 28 Nov 2024 00:00:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732752022; cv=none; b=Jdz87KfYp5PHGvNBKpHhiQvr4vtAd4JaWtM+X1gZDyNpZNq7wGr3epEGDNLN4bFGMD71nMJcKfzqZNV0cp8qbbOtiPMUTZUj7/T6nttRqflTgfn7DLts18CKFGoojuyQqLKlX+Wwg+X946UYnWrGIZ8vMtbO6Dc7eUBAVohfyjE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732752022; c=relaxed/simple; bh=Bl9YBE2svj+PNz1C/aoO6LFubVNyHfLcVRkyqL8L6ao=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=b86Al6gnr8XptOx6HZCSe61uYNzCfKqaJed52h/e1JSsjy3X7DgQ9PEcs2wo7exBDWiuXLD/QN5r9Kd+vbo/AU2pBy+2/nm8Ou78IEsfOkfqFRjq/Oiz9Nk8rDLtNb+bmcmk4kqGE02q7vkgaQwo9Qzyb15FlwmXW0cL+aoA7T0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=gUsYxC5T; arc=none smtp.client-ip=209.85.215.201 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--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="gUsYxC5T" Received: by mail-pg1-f201.google.com with SMTP id 41be03b00d2f7-7ea0069a8b0so124172a12.0 for ; Wed, 27 Nov 2024 16:00:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1732752019; x=1733356819; 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=+H2iSWdqRj5eAJy1r0kI7Xo89w48MESzlLl9jWX3kvs=; b=gUsYxC5TmWUSQRgxXGAgCNfzsxeQUGDIlAr/ywvHmQ3Z7UOPBMjCaJYoQTx0n7AM9i ++nVpllJnGl9hDdxp6EGTVl3e/63eVZ7Di1vBrMJbDvyGKM/vz6OQBytfunefSNNzk84 bE+V4eIErHyuTjEEy9eNd1FlJwvLnTZItgB2fiViIs3hPIWaJF6bZQuXd03EHTMAsjgw tfZO+rYCzEZNQBPv055har8wpixiAznd0+EXdrjphknCxfdoiTLmrp286acn4libnU60 sfFvo7DhsejoeOsa1VcMtnU2umcobtfCuoDDFD7xYainSr2cHFRqUSM3wB6JlkGPJVd4 eVIw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732752019; x=1733356819; 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=+H2iSWdqRj5eAJy1r0kI7Xo89w48MESzlLl9jWX3kvs=; b=uUfz0XpFLGj/asYluxZK1OGmvJ+LPEpZDxt5M/KveQm8rglaCGcbEqpcOQQ47+unXD B1O6xHMnTR8KVaO21TI/XQIKmZZUyz3f0XqEddblhQWc/KvzBY1ytUamPA1M+uobDN4v FTzVnW6ucDXU+/xi7XcgI+uyZePKBomJtF63QxeeMmeAhTXbf2EGGFZfpqdanj7dIiGn jIzowmnpdRWCGd1hkn7plj1UD4E+e3ojPq0Xy0cdo+bI21NRMc2MMxNN4VqwFEU4FHhB i0KzIXMWZOna17bWnUY2gtZY5mamNjUzyb9kcoJZ/ggl5BH1wExqho1oTHQUmoKLLSes TMGA== X-Forwarded-Encrypted: i=1; AJvYcCW+DTMhCeG6oMw25e8+kIJp89eEuOOaTt75V1yrGo2wSsXM/6mLfCrrDPsbjvhAE6N6TCgvqkPyE0bSwKo=@vger.kernel.org X-Gm-Message-State: AOJu0Yyqd3C7rKb3OATDtbdv6cOahPwv0qq9qZzh3/HpHJp/1MU/XBpY NQGY4g3aBpgQ5rBKLhQaCOVAC7orWijtNEfOb5L33lyqs6jwe319exFTWnmkDJvdmxN0zphkdsX +2Q== X-Google-Smtp-Source: AGHT+IEnhKnLTNnY6wu2VCIdO8CckiAJ2KH61nyu+EuExVAT6pK4GO2kObcoAN/7xl77VvVEEQEtoZT3aIU= X-Received: from pjbqj5.prod.google.com ([2002:a17:90b:28c5:b0:2ea:9f2f:2ad9]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:4394:b0:1db:d8df:8c4e with SMTP id adf61e73a8af0-1e0e0afa6c0mr7417582637.12.1732752019145; Wed, 27 Nov 2024 16:00:19 -0800 (PST) Reply-To: Sean Christopherson Date: Wed, 27 Nov 2024 16:00:09 -0800 In-Reply-To: <20241128000010.4051275-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241128000010.4051275-1-seanjc@google.com> X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog Message-ID: <20241128000010.4051275-2-seanjc@google.com> Subject: [PATCH v2 1/2] KVM: x86: Plumb in the vCPU to kvm_x86_ops.hwapic_isr_update() From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Chao Gao , "=?UTF-8?q?Markku=20Ahvenj=C3=A4rvi?=" , Janne Karhunen Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Pass the target vCPU to the hwapic_isr_update() vendor hook so that VMX can defer the update until after nested VM-Exit if an EOI for L1's vAPIC occurs while L2 is active. Note, commit d39850f57d21 ("KVM: x86: Drop @vcpu parameter from kvm_x86_ops.hwapic_isr_update()") removed the parameter with the justification that doing so "allows for a decent amount of (future) cleanup in the APIC code", but it's not at all clear what cleanup was intended, or if it was ever realized. No functional change intended. Cc: stable@vger.kernel.org Reviewed-by: Chao Gao Signed-off-by: Sean Christopherson --- arch/x86/include/asm/kvm_host.h | 2 +- arch/x86/kvm/lapic.c | 11 +++++------ arch/x86/kvm/vmx/vmx.c | 2 +- arch/x86/kvm/vmx/x86_ops.h | 2 +- 4 files changed, 8 insertions(+), 9 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_hos= t.h index e159e44a6a1b..5aa50dfe0104 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1735,7 +1735,7 @@ struct kvm_x86_ops { bool allow_apicv_in_x2apic_without_x2apic_virtualization; void (*refresh_apicv_exec_ctrl)(struct kvm_vcpu *vcpu); void (*hwapic_irr_update)(struct kvm_vcpu *vcpu, int max_irr); - void (*hwapic_isr_update)(int isr); + void (*hwapic_isr_update)(struct kvm_vcpu *vcpu, int isr); void (*load_eoi_exitmap)(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap); void (*set_virtual_apic_mode)(struct kvm_vcpu *vcpu); void (*set_apic_access_page_addr)(struct kvm_vcpu *vcpu); diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 3c83951c619e..39ae2f5f9866 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -763,7 +763,7 @@ static inline void apic_set_isr(int vec, struct kvm_lap= ic *apic) * just set SVI. */ if (unlikely(apic->apicv_active)) - kvm_x86_call(hwapic_isr_update)(vec); + kvm_x86_call(hwapic_isr_update)(apic->vcpu, vec); else { ++apic->isr_count; BUG_ON(apic->isr_count > MAX_APIC_VECTOR); @@ -808,7 +808,7 @@ static inline void apic_clear_isr(int vec, struct kvm_l= apic *apic) * and must be left alone. */ if (unlikely(apic->apicv_active)) - kvm_x86_call(hwapic_isr_update)(apic_find_highest_isr(apic)); + kvm_x86_call(hwapic_isr_update)(apic->vcpu, apic_find_highest_isr(apic)); else { --apic->isr_count; BUG_ON(apic->isr_count < 0); @@ -2806,7 +2806,7 @@ void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init= _event) if (apic->apicv_active) { kvm_x86_call(apicv_post_state_restore)(vcpu); kvm_x86_call(hwapic_irr_update)(vcpu, -1); - kvm_x86_call(hwapic_isr_update)(-1); + kvm_x86_call(hwapic_isr_update)(vcpu, -1); } =20 vcpu->arch.apic_arb_prio =3D 0; @@ -3121,9 +3121,8 @@ int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct = kvm_lapic_state *s) kvm_apic_update_apicv(vcpu); if (apic->apicv_active) { kvm_x86_call(apicv_post_state_restore)(vcpu); - kvm_x86_call(hwapic_irr_update)(vcpu, - apic_find_highest_irr(apic)); - kvm_x86_call(hwapic_isr_update)(apic_find_highest_isr(apic)); + kvm_x86_call(hwapic_irr_update)(vcpu, apic_find_highest_irr(apic)); + kvm_x86_call(hwapic_isr_update)(vcpu, apic_find_highest_isr(apic)); } kvm_make_request(KVM_REQ_EVENT, vcpu); if (ioapic_in_kernel(vcpu->kvm)) diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 893366e53732..22cb11ab8709 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -6862,7 +6862,7 @@ void vmx_set_apic_access_page_addr(struct kvm_vcpu *v= cpu) read_unlock(&vcpu->kvm->mmu_lock); } =20 -void vmx_hwapic_isr_update(int max_isr) +void vmx_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr) { u16 status; u8 old; diff --git a/arch/x86/kvm/vmx/x86_ops.h b/arch/x86/kvm/vmx/x86_ops.h index a55981c5216e..48dc76bf0ec0 100644 --- a/arch/x86/kvm/vmx/x86_ops.h +++ b/arch/x86/kvm/vmx/x86_ops.h @@ -48,7 +48,7 @@ void vmx_migrate_timers(struct kvm_vcpu *vcpu); void vmx_set_virtual_apic_mode(struct kvm_vcpu *vcpu); void vmx_apicv_pre_state_restore(struct kvm_vcpu *vcpu); void vmx_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr); -void vmx_hwapic_isr_update(int max_isr); +void vmx_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr); int vmx_sync_pir_to_irr(struct kvm_vcpu *vcpu); void vmx_deliver_interrupt(struct kvm_lapic *apic, int delivery_mode, int trig_mode, int vector); --=20 2.47.0.338.g60cca15819-goog