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charset="UTF-8" From: Ard Biesheuvel Prevent the I-cache from fetching stale data by issuing a barrier after the data cache maintenance completes but before performing the I-cache maintenance. Cc: Signed-off-by: Ard Biesheuvel --- drivers/firmware/efi/libstub/arm64.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/firmware/efi/libstub/arm64.c b/drivers/firmware/efi/libstub/arm64.c index e57cd3de0a00..62fc8e53c8a0 100644 --- a/drivers/firmware/efi/libstub/arm64.c +++ b/drivers/firmware/efi/libstub/arm64.c @@ -107,6 +107,8 @@ void efi_cache_sync_image(unsigned long image_base, base += lsize; size -= lsize; } while (size >= lsize); + + dsb(ish); } asm("ic ialluis"); -- 2.56.0.542.g3ef89b7020-goog From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 280E9606A321 for ; Tue, 10 Nov 2026 12:17:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=B5YSWa49; 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Tue, 10 Nov 2026 04:17:40 -0800 (PST) Date: Tue, 10 Nov 2026 13:17:33 +0100 In-Reply-To: <20261110121731.2728824-12-ardb+git@google.com> X-Archived-By: Mime-Version: 1.0 References: <20261110121731.2728824-12-ardb+git@google.com> X-Mailer: git-send-email 2.56.0.542.g3ef89b7020-goog Message-ID: <20261110121731.2728824-13-ardb+git@google.com> Subject: [PATCH v2 01/10] efi/zboot: arm64: Add missing barrier after cache maintenance From: Ard Biesheuvel To: linux-efi@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Ard Biesheuvel , Jason Gunthorpe , Paul Walmsley , Palmer Dabbelt , Albert Ou , Huacai Chen , loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, stable@vger.kernel.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261110_041742_586813_F626E401 X-CRM114-Status: UNSURE ( 8.08 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -9.5 (---------) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" X-Spam-Status: No, score=-16.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 From: Ard Biesheuvel Prevent the I-cache from fetching stale data by issuing a barrier after the data cache maintenance completes but before performing the I-cache maintenance. Cc: Signed-off-by: Ard Biesheuvel --- drivers/firmware/efi/libstub/arm64.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/firmware/efi/libstub/arm64.c b/drivers/firmware/efi/libstub/arm64.c index e57cd3de0a00..62fc8e53c8a0 100644 --- a/drivers/firmware/efi/libstub/arm64.c +++ b/drivers/firmware/efi/libstub/arm64.c @@ -107,6 +107,8 @@ void efi_cache_sync_image(unsigned long image_base, base += lsize; size -= lsize; } while (size >= lsize); + + dsb(ish); } asm("ic ialluis"); -- 2.56.0.542.g3ef89b7020-goog _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv