From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=13.77.154.182 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793405687; b=yTDrc810/Zxro3urYUGvBHt+gnDFnYk9IirWCd8MYnD5h92Dtq93gJK+ubPDabFaewGD kaVZhxOn+YTwDqZZ3RFyIYPGmOa/rCgquCWCR9ABIHcGnl1bhEPCHRILVdY0tYNgcstRy rXFbWCyDIbJahq13Um4VWZEQeHmsZeEORT4dmrZ1eIiNV96YxqPSg0c93Pe4zVrXYGkkJ 3MzXqWAN9+mhKJyHeD4NiBhXyYNw0DYnO5I2NwnADAvTRJzA6wPZMM6Ltn9m4vnxixHHv cau3J2YvxHwpixIaGgj7N5kBEgmu7E4RBG0b05rayEaaab8Aoa1fEde815j5dz/dXPg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793405687; h=DMARC-Filter:Received:DKIM-Filter:DKIM-Signature:From:To:Cc:Subject: Date:Message-ID:X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding:X-Spam-Status:X-Spam-Checker-Version; bh=UZaxZ3Xj6BQMasztnzAo4Ozc8Pd1UX24Y0xc+tKwRzc=; b=5BxkvwB7NJOy9sVnh6NzyIc3iDJnvwUkpS+r2K7rrEyI6ADGlEEuTYR5z+ofPZ4gsU3p /cWrp3Ie4RA9zo4WeaWr1uzxGajggc1AGbl9RyaERTmxFwP23WszkdOdGqibaISpNRJJc yf81D+55BQve6uyEUh2CpdhjeQbSa9WoTfTUjl2Vz5rQErdYtH1adot2n2hXD/IMYPJOc U/6ynDg+3vOXHDTfvVV9yjv9gMWWy2b8BTejOzOGpHA0/ulPeDRtffCU5pNDVfsHx/Qwc +fcknwjJqTYHiDt4VyShpgU11IHr6AxwvWmn+qunuvcdVnv0PVVQqeHnyd8B1NW9yOQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass header.d=linux.microsoft.com header.i=@linux.microsoft.com header.a=rsa-sha256 header.s=default header.b=Y65z0RwT; arc=none smtp.remote-ip=13.77.154.182 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 9FD9C606A33A; Sat, 31 Oct 2026 00:14:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 9FD9C606A33A Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; 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 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-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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