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a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1737606433; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=FUVHLo8ZQw9HuI2d8HGefUGZmMCOMsVfRQUVMierrfw=; b=Ug+ZbysQtrtvWM8etI21iGbj9yPKSXWKuZ3r+4ZT3K/pszRrWhmWYViHhUC8rMHbHt6qQn RGgjhsbOcPYfrS+KYSUCfnIzyiRp7xbYqG4Sqr5HmLXtoiZgfeMFKwTVVGSkHPfhhsnyII VP5Ei/Mb9eWPjR4la+RCICDUVnpbm+M= 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 1taols-000000005uH-31yY; Wed, 22 Jan 2025 23:24:48 -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 Subject: [PATCH v7 07/12] x86/mm: use INVLPGB in flush_tlb_all Date: Wed, 22 Jan 2025 23:23:26 -0500 Message-ID: <20250123042447.2259648-8-riel@surriel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250123042447.2259648-1-riel@surriel.com> References: <20250123042447.2259648-1-riel@surriel.com> MIME-Version: 1.0 X-Rspam-User: X-Rspamd-Queue-Id: 8644540005 X-Rspamd-Server: rspam10 X-Stat-Signature: npr8exinsqog5t3ybwj8ddiqrazi1mg6 X-HE-Tag: 1737606433-281975 X-HE-Meta: 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 0icvdfct Vx5tvGHjDk59NvLK5CRl1TzyawWB2U7+qgzsF5lm+Aj0WsNNoa81sAkgfGgoDROuYI2sorFO8i+rWBm5BsLSjd6qB8OC5QrwvDcQo1T7TJYSnT0kt2ftPaT8QPVrThB61UoX43GP1i6PmaShwpoVZ8a/0UAFjk/coNNjl7i+C+8GvTtvPZ7D9TZMuCbJ38aEd3WKQovUAOFirjwjR1TztPGcVpgP3nTQVL58p4F5xbN5LSqlxLp/Z3lEBzPB/+DE5nNYsOiuI6zncRGkwR98sj1wT41N3tFWaD5MAbzrdRszu7zsZBOIjPq6pv8LTFH5EIu2gZ7Nn/FI7u2QOVWfc6VeZ0vwQLZOyp4v0mvWL2v8PujrOXGA9BSLKEmGl8mP0uCi61N5ZmulQFSjNXsHKhtwKzfuIrlkXhylyjrWFhyOfzTIk5I8X2/MCjw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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 --- 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 2c9e9b7482dd..e2a0b7fc5fed 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -1065,6 +1065,19 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, } +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); @@ -1073,6 +1086,8 @@ static void do_flush_tlb_all(void *info) 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); }