From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 126101411EB; Thu, 26 Dec 2024 21:31:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735248674; cv=none; b=of28iS+XYd9lmxzXTPPkMhptv2e+8G0TwGWDsuvx+ZCbD03QcqMNAdq/+jYFHNKDiBYI+R2q0B7z2jfqkcAhOv/iy9xcsksFQUrKDj8kxQzLRPMi2qyz/hlCt6Qov3feHgMv+NzJlK+T1jy1umz7sui6pPr7M9Rb/PGvgAL4jZE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735248674; c=relaxed/simple; bh=HoFMyxPQ4+vHjO5aNu8dprTKaB0BfQ/OCxXps0eLfws=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=djWwPaHvwq2ykd1sOO+4z4BVa6GDpbUzWMG/gEyI5IHPZZJThSBKf7D1q2y679A5qga6O/STLQqf7aKgzqW5ei9hEAGrHj9eZ0tRMA3gBNXDZm+kJwYdkPo5NGrfCF4YfOg1zGzDBSAIT/589uXFe861mNM/O0dLsjiwSWq+JxY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=r4da50yv; arc=none smtp.client-ip=13.77.154.182 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) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="r4da50yv" Received: from romank-3650.corp.microsoft.com (unknown [131.107.160.188]) by linux.microsoft.com (Postfix) with ESMTPSA id 75011203EC26; Thu, 26 Dec 2024 13:31:12 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 75011203EC26 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1735248672; bh=n/7BbD0J/6ZyeZxeLEf6nxi13TKSTWUcLtaICTY9HoA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r4da50yvdLFm/hm9IPe7stmWuYCPFZSznNoHw50pT84OOCeEZktoEyF7qGm2TH0wR YXlMFLt/4SDr3LFidMuws6092zNnktJy0FPxY/CA+0/i/jiNyswb0knWspAp5eXKgA B9iX1fisSm8NOFZNE9vVd2I4SEmhTP2CPoTZhQVQ= From: Roman Kisel To: hpa@zytor.com, kys@microsoft.com, bp@alien8.de, dave.hansen@linux.intel.com, decui@microsoft.com, eahariha@linux.microsoft.com, haiyangz@microsoft.com, mingo@redhat.com, mhklinux@outlook.com, nunodasneves@linux.microsoft.com, tglx@linutronix.de, tiala@microsoft.com, wei.liu@kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org Cc: apais@microsoft.com, benhill@microsoft.com, ssengar@microsoft.com, sunilmut@microsoft.com, vdso@hexbites.dev Subject: [PATCH v3 2/5] hyperv: Fix pointer type for the output of the hypercall in get_vtl(void) Date: Thu, 26 Dec 2024 13:31:07 -0800 Message-Id: <20241226213110.899497-3-romank@linux.microsoft.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241226213110.899497-1-romank@linux.microsoft.com> References: <20241226213110.899497-1-romank@linux.microsoft.com> Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Commit bc905fa8b633 ("hyperv: Switch from hyperv-tlfs.h to hyperv/hvhdk.h") changed the type of the output pointer to `struct hv_register_assoc` from `struct hv_get_vp_registers_output`. That leads to an incorrect computation, and leaves the system broken. Use the correct pointer type for the output of the GetVpRegisters hypercall. Signed-off-by: Roman Kisel --- arch/x86/hyperv/hv_init.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index 3cf2a227d666..ba469d6b8250 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arch/x86/hyperv/hv_init.c @@ -416,13 +416,13 @@ static u8 __init get_vtl(void) { u64 control = HV_HYPERCALL_REP_COMP_1 | HVCALL_GET_VP_REGISTERS; struct hv_input_get_vp_registers *input; - struct hv_register_assoc *output; + struct hv_output_get_vp_registers *output; unsigned long flags; u64 ret; local_irq_save(flags); input = *this_cpu_ptr(hyperv_pcpu_input_arg); - output = (struct hv_register_assoc *)input; + output = (struct hv_output_get_vp_registers *)input; memset(input, 0, struct_size(input, names, 1)); input->partition_id = HV_PARTITION_ID_SELF; @@ -432,7 +432,7 @@ static u8 __init get_vtl(void) ret = hv_do_hypercall(control, input, output); if (hv_result_success(ret)) { - ret = output->value.reg8 & HV_X64_VTL_MASK; + ret = output->values[0].reg8 & HV_X64_VTL_MASK; } else { pr_err("Failed to get VTL(error: %lld) exiting...\n", ret); BUG(); -- 2.34.1