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 0C32E606A31A for ; Sat, 31 Oct 2026 00:15:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=vsUgCHVJ; dkim=pass (1024-bit key, unprotected) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.a=rsa-sha256 header.s=default header.b=Y65z0RwT DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Unsubscribe-Post: List-Owner; bh=UZaxZ3Xj6BQMasztnzAo4Ozc8Pd1UX24Y0xc+tKwRzc=; b=vsUgCHVJD2vskH 5tMe/kPaTdLqcMmNIdYHQrhxPhoabquqeOzLTzfijn775zcb2KY9Dws61fS9Y32Vehfc/C/qT0X+i ouaeh2VVDQ7GJcrh44a2UCtFKbQCZFb+TdLe4HP705MINmszTUkg4fy3rgBfgJKWOJ6UJ5c+qIbNe rZSiw5QMubMfHuOq/0ja4T+nQjKIRE7SAXyeMv4Szba3xrlV6zP9H+QakrUu3oef1uECcDIbWrFPH DtboBNA41M2rfcU7KecWZxTL+WdVBhv1mLAws53zrdq7lt6uIoHJ9Ccd5N5SPMr3CjSZ+SciX8CQO NtMmCf7pRRGxvn/K2rhQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xMwkb-0000000Clqm-054r; Sat, 31 Oct 2026 00:15:13 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xMwk5-0000000Cldx-3Uyy for linux-arm-kernel@lists.infradead.org; Sat, 31 Oct 2026 00:14:42 +0000 Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id 6E5F720B7166; Fri, 30 Oct 2026 17:14:28 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 6E5F720B7166 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1793405668; bh=UZaxZ3Xj6BQMasztnzAo4Ozc8Pd1UX24Y0xc+tKwRzc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Y65z0RwTxcPxIGklvi2ejn+smW3Rp1xeaXpQyWkxTFkLcb85HhS+tBgPn5stYbQ/J 1ug8CxZ0WZJKd3v+W3BbqdnQpTLCtLbVvo9sdZ9Tgik64XiAaGbHfLyDMxm125r9Zj aimCJDo+Lov4J+yZ8WboIWok1h3IWqG4/xzk0zlY= From: Kameron Carr To: decui@microsoft.com, haiyangz@microsoft.com, mhklinux@outlook.com, wei.liu@kernel.org Cc: arnd@arndb.de, catalin.marinas@arm.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, lpieralisi@kernel.org, mark.rutland@arm.com, sudeep.holla@kernel.org, thuth@redhat.com, will@kernel.org Subject: [PATCH v6 6/6] arm64: hyperv: Implement hv_is_isolation_supported() for CCA Realms Date: Fri, 30 Oct 2026 17:14:12 -0700 Message-ID: <20261031001412.4150488-7-kameroncarr@linux.microsoft.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: <20261031001412.4150488-1-kameroncarr@linux.microsoft.com> References: <20261031001412.4150488-1-kameroncarr@linux.microsoft.com> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261030_171441_919550_6B2067B6 X-CRM114-Status: UNSURE ( 6.81 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Provide an arm64 implementation of hv_is_isolation_supported() that overrides the __weak default in drivers/hv/hv_common.c. The implementation deliberately does not depend on hv_is_hyperv_initialized() because hv_common_init() consults hv_is_isolation_supported() before hyperv_initialized is set. Reviewed-by: Michael Kelley Signed-off-by: Kameron Carr --- arch/arm64/hyperv/mshyperv.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c index da6c3aa0..8a2c446 100644 --- a/arch/arm64/hyperv/mshyperv.c +++ b/arch/arm64/hyperv/mshyperv.c @@ -187,3 +187,8 @@ bool hv_isolation_type_cca(void) { return is_realm_world(); } + +bool hv_is_isolation_supported(void) +{ + return is_realm_world(); +} -- 2.45.4