From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f200.google.com (mail-pl1-f200.google.com [209.85.214.200]) (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 2248848C412 for ; Wed, 26 Aug 2026 21:33:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787779999; cv=none; b=Nh6ne2h2MvlqBJJFKg6TLEyfRkgcf9UuM0oNC7H7TqWbQ5xazRcbzyP/OZgtwc69ECriOKMs/NLFtuniFZ9d5ZmbG7hdrEzktz3AZQO6SIa6KMF8YrOzyjXjZjSen3nUZVRQxnsEkUqZQbM5Z55bwiUOGIFV40qfyRn0Bytamqc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787779999; c=relaxed/simple; bh=1dubEWiH+wDpaRTr6xDH5FSSCgfhV3tA2a7yb409fro=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=EasHG/SAbrIIu5AaQL+3hr/ASFohP4psyIPeVFA0MNgIuoiIPWm9QZmWAigfKofGbcQyl+14GrFYycscFHqlFAYQsfVENkinRpZF+W1OSugrLFAIID7EphkeFHfs0PBbhoul6D8MLNKk3p4WKtbvQ5xw4TtaE3YA6ltfI/vR2KE= 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=rvp5AY2S; arc=none smtp.client-ip=209.85.214.200 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="rvp5AY2S" Received: by mail-pl1-f200.google.com with SMTP id d9443c01a7336-2d55d8cd938so4620945ad.1 for ; Wed, 26 Aug 2026 14:33:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1787779995; x=1788384795; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:reply-to:from:to:cc:subject:date:message-id :reply-to:content-type; bh=iaeGWHwlG+AWk9QHVwY9V6qXxKpEzxckDrOJKqWFOA8=; b=rvp5AY2SqLRucYy7MFVva3mw9Zl9G3aLWfuJouawTo1NwwhJLPALb4wkkOnClPIYT0 FRl8ihJQmHzjKHcR7limoh7n6Ql7snRhviz6Afz5/zGeMBao6ZuSJ1EPaVsMWFBUMtGP iXaLICt8ucwFsEKfVuj25AUQCJ19e9MXnAvZKQ5h1d+Xe0NfiuKwcaFd7Qc0azlfBrQH HJgxtl+wuDwvPROgsFPZmgFeexyTCQjWzdaysgRqJmWso3VMyXz1h1mo4YmD/gEmCi97 MtlXp7Hip17f5cicXEV76DT5ZbzeEhwkj5Mu8r+GhSkg/5q0C74NdOHjhwFu5m0oa0uz YVoA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787779995; x=1788384795; h=content-type: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:content-type; bh=iaeGWHwlG+AWk9QHVwY9V6qXxKpEzxckDrOJKqWFOA8=; b=gigkagZefi40UWP9+1DUq0TUQEuqdYbd3V2jIGhDG8CWYdJ3MisYoV4pBZOga2XBRT XpzrF+4C1g1ERdzOE8Kg3nMvLsiyZe7tTqwNh9+NGS5239WY8hEvX8yioOKeim2sE82U +Y8rnKLZs3VMWSy5vocynqswH0+0fStO1GHWSTyLBFDMzv5tcPimP22Ouzvdg8gE4xd+ fTUjQm3Y8+3ZR511jLuZ52aKngE2dSl1nly+XEI0UOpXCc6+DmmR6n5aT2EFznxera/u rTkwcg/e1/PzBmg6Bg6WFIskZY5GIKCcTmOkoZjK//32vHcdR4zpUv6XZ/+PsY3gbk3g 6juw== X-Forwarded-Encrypted: i=1; AHgh+RpKfVo6v0WXP7flnNYHeLfpdb4agIxKDDXCXXN0edjfwb4kCc1w9iJVSlIUj27m08UXAVhYxkZlik33zLQ=@vger.kernel.org X-Gm-Message-State: AFuF++mG7p1zwDL3nKChzK46ygPcsJZNAe3Li4WAYLtkT2QCXxmo1IPQ nKofeIeYR18R7aVGytJjYMvvBUBDqvi3s6q4nsDaUgPUPDMuj1cR0N8x+ksqgTK7GuOCDM/ZT2x TmXdTpg== X-Received: from plbmq13.prod.google.com ([2002:a17:902:fd4d:b0:2ca:cf09:91ca]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:120c:b0:2c6:90ec:f601 with SMTP id d9443c01a7336-2d707aaad36mr147369515ad.8.1787779995135; Wed, 26 Aug 2026 14:33:15 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 26 Aug 2026 14:32:49 -0700 In-Reply-To: <20260826213303.914988-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260826213303.914988-1-seanjc@google.com> X-Mailer: git-send-email 2.55.0.887.g758fc8c411-goog Message-ID: <20260826213303.914988-10-seanjc@google.com> Subject: [PATCH v10 09/21] KVM: x86: Wrap all of __get_kvmclock_master_clock() with CONFIG_X86_64=y From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Paul Durrant , David Woodhouse , Dongli Zhang Content-Type: text/plain; charset="UTF-8" From: David Woodhouse Wrap the entire use_master_clock block in #ifdef CONFIG_X86_64, since use_master_clock is never true on 32-bit (host_tsc_clocksource is only set under CONFIG_X86_64), and declare hv_clock inside the block so it is not left as an unused variable on 32-bit. Signed-off-by: David Woodhouse [sean: keep only the CONFIG_X86_64 ifdef, update changelog accordingly] Signed-off-by: Sean Christopherson --- arch/x86/kvm/x86.c | 33 ++++++++++++++++----------------- 1 file changed, 16 insertions(+), 17 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 4f98cc71a671..64df8da3aad4 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1656,8 +1656,10 @@ static unsigned long get_cpu_tsc_khz(void) static bool __get_kvmclock_master_clock(struct kvm *kvm, struct kvm_clock_data *data) { +#ifdef CONFIG_X86_64 struct kvm_arch *ka = &kvm->arch; struct pvclock_vcpu_time_info hv_clock; + struct timespec64 ts; u64 tsc_hz; if (!ka->use_master_clock) @@ -1674,27 +1676,24 @@ static bool __get_kvmclock_master_clock(struct kvm *kvm, if (!tsc_hz) return false; - { -#ifdef CONFIG_X86_64 - struct timespec64 ts; - - if (kvm_get_walltime_and_clockread(&ts, &data->host_tsc)) { - data->realtime = ts.tv_nsec + NSEC_PER_SEC * ts.tv_sec; - data->flags |= KVM_CLOCK_REALTIME | KVM_CLOCK_HOST_TSC; - } else -#endif + if (kvm_get_walltime_and_clockread(&ts, &data->host_tsc)) { + data->realtime = ts.tv_nsec + NSEC_PER_SEC * ts.tv_sec; + data->flags |= KVM_CLOCK_REALTIME | KVM_CLOCK_HOST_TSC; + } else { data->host_tsc = rdtsc(); - - data->flags |= KVM_CLOCK_TSC_STABLE; - hv_clock.tsc_timestamp = ka->master_cycle_now; - hv_clock.system_time = ka->master_kernel_ns + ka->kvmclock_offset; - kvm_get_time_scale(NSEC_PER_SEC, tsc_hz, - &hv_clock.tsc_shift, - &hv_clock.tsc_to_system_mul); - data->clock = __pvclock_read_cycles(&hv_clock, data->host_tsc); } + data->flags |= KVM_CLOCK_TSC_STABLE; + hv_clock.tsc_timestamp = ka->master_cycle_now; + hv_clock.system_time = ka->master_kernel_ns + ka->kvmclock_offset; + kvm_get_time_scale(NSEC_PER_SEC, tsc_hz, + &hv_clock.tsc_shift, + &hv_clock.tsc_to_system_mul); + data->clock = __pvclock_read_cycles(&hv_clock, data->host_tsc); return true; +#else + return false; +#endif } static void get_kvmclock(struct kvm *kvm, struct kvm_clock_data *data) -- 2.55.0.887.g758fc8c411-goog