From nobody Tue Dec 16 05:42:52 2025 Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B0F6118950A for ; Thu, 6 Feb 2025 04:44:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=96.67.55.147 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738817059; cv=none; b=AgItvllXbe2PRZFWqXrxGWaZgp6Y5oVArBi72ikTnmLzVg1ZIaGTfF/CYhZjcvInmLv3dTKxQn34WwYhzvm3lk7zfzDlkGvQVkDtfkBqhihOmKcHPxvMB6iahgHdUJ80I3JXL3v5arIeYOShcLJuiP06e+Y89sPrrGj3yqu1JRk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738817059; c=relaxed/simple; bh=+5zbRciSoFCWXXamUnMkT2CsyUGmDo1Fd8UoKqH+Xa8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eBYEjF0gcnXINMv6jfAlh70GChaLbLaimtOmVgA0ynzqUkw0ufRxOIvtWnk9FjQPyob1XoNnOCk54xfSYhzp8k0ixDyj6cYS/MhGJnWCyy5xqxwV9qcMuaxNlnC5+UaDrGTnzyuR2Vb2cJqfludls0l/10RLXmx8LwOpAnxOZAA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=surriel.com; spf=pass smtp.mailfrom=shelob.surriel.com; arc=none smtp.client-ip=96.67.55.147 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=surriel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=shelob.surriel.com Received: from fangorn.home.surriel.com ([10.0.13.7]) by shelob.surriel.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.97.1) (envelope-from ) id 1tftjw-000000004tQ-2Ndp; Wed, 05 Feb 2025 23:43:48 -0500 From: Rik van Riel To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, bp@alien8.de, peterz@infradead.org, dave.hansen@linux.intel.com, zhengqi.arch@bytedance.com, nadav.amit@gmail.com, thomas.lendacky@amd.com, kernel-team@meta.com, linux-mm@kvack.org, akpm@linux-foundation.org, jannh@google.com, mhklinux@outlook.com, andrew.cooper3@citrix.com, Rik van Riel , Manali Shukla Subject: [PATCH v9 07/12] x86/mm: use INVLPGB in flush_tlb_all Date: Wed, 5 Feb 2025 23:43:26 -0500 Message-ID: <20250206044346.3810242-8-riel@surriel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250206044346.3810242-1-riel@surriel.com> References: <20250206044346.3810242-1-riel@surriel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: riel@surriel.com Content-Type: text/plain; charset="utf-8" The flush_tlb_all() function is not used a whole lot, but we might as well use broadcast TLB flushing there, too. Signed-off-by: Rik van Riel Tested-by: Manali Shukla --- arch/x86/mm/tlb.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index 227e972b6fbc..d225a3df9aa7 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -1074,6 +1074,19 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsign= ed long start, } =20 =20 +static bool broadcast_flush_tlb_all(void) +{ + if (!IS_ENABLED(CONFIG_X86_BROADCAST_TLB_FLUSH)) + return false; + + if (!cpu_feature_enabled(X86_FEATURE_INVLPGB)) + return false; + + guard(preempt)(); + invlpgb_flush_all(); + return true; +} + static void do_flush_tlb_all(void *info) { count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED); @@ -1082,6 +1095,8 @@ static void do_flush_tlb_all(void *info) =20 void flush_tlb_all(void) { + if (broadcast_flush_tlb_all()) + return; count_vm_tlb_event(NR_TLB_REMOTE_FLUSH); on_each_cpu(do_flush_tlb_all, NULL, 1); } --=20 2.47.1