From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 50CB23C09F7; Tue, 12 May 2026 17:49:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778608147; cv=none; b=pFKfMobfoUm6sq4ACqzynUo0BvC1exqW921UsTzKpyOzQ4SpAvcpBTSCMynmsckTp3UldTYU702bT+WU+dJ7fXaz8d4fs6D/NYcsbY0Aiw10PxW1VTQDZbbg48xiL7Zh0xV/P4jf4sCrvgE6Tf/kxl8onb9I3cccUktGE0Tu8Ok= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778608147; c=relaxed/simple; bh=mJ7m9s0KqKHkxCR3Cnfw+/rZtPUA+ADFji1I25BLKx8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Hp5cJrkjUHMDwKOhvVXauu2R9kfQ5+f1ZhZnFQRMIkpKrcZ1twV2scq0+0epoMonNumQgyFpcnJj9dPTBzJUZHjk6u9VWxk9lQ8CjchJSKu3XTEbYwUEzHPivXUXnLCKCQZb24b8ZeQ7be7SOGrPh+79SkrRhAwoLF+bxP4WqAs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=H3W6blPB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="H3W6blPB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D78A4C2BCB0; Tue, 12 May 2026 17:49:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778608147; bh=mJ7m9s0KqKHkxCR3Cnfw+/rZtPUA+ADFji1I25BLKx8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H3W6blPBlUB/7v4mCkVmMckoPydO1DvQp6QefZilu5iOIa9sTj3rhkJYLFVzvcA3n 6m/9uU3Nj3OlDD8/fRbkM3JrSDUPGKtxrdfdNd6fKSHJBW/N/xJa7apnfQ8Cxw2Zwl DEuHssZ2qOpPWG5w3Yq1VlXJ4tx7aE0dqbmpGM/0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xianglai Li , Huacai Chen Subject: [PATCH 6.12 173/206] LoongArch: KVM: Fix "unreliable stack" for kvm_exc_entry Date: Tue, 12 May 2026 19:40:25 +0200 Message-ID: <20260512173936.524721371@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260512173932.810559588@linuxfoundation.org> References: <20260512173932.810559588@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Xianglai Li commit b323a441da602dfdfc24f30d3190cac786ffebf2 upstream. Insert the appropriate UNWIND hint into the kvm_exc_entry assembly function to guide the generation of correct ORC table entries, thereby solving the timeout problem ("unreliable stack") while loading the livepatch-sample module on a physical machine running virtual machines with multiple vcpus. Cc: stable@vger.kernel.org Signed-off-by: Xianglai Li Signed-off-by: Huacai Chen Signed-off-by: Greg Kroah-Hartman --- arch/loongarch/kvm/switch.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/loongarch/kvm/switch.S +++ b/arch/loongarch/kvm/switch.S @@ -112,7 +112,7 @@ .text .cfi_sections .debug_frame SYM_CODE_START(kvm_exc_entry) - UNWIND_HINT_UNDEFINED + UNWIND_HINT_END_OF_STACK csrwr a2, KVM_TEMP_KS csrrd a2, KVM_VCPU_KS addi.d a2, a2, KVM_VCPU_ARCH