[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PATCH] drivers/xen/hypervisor: Expose VM SIF flags to userspace
- To: Per Bilse <per.bilse@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx
- From: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
- Date: Tue, 29 Nov 2022 11:29:56 -0500
- Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=mq2EyLheTw9mVWD65B0+V3EYuiw20r72c130RGNlN2Q=; b=eqsnxOm0AcZzAXJPOmF6mJLpJOjlJrn8eleHm6kj7tPr1/EnK8BSgUOeXr+ls9Nzc7+6IWfYIErbic5rzlyjMKymSMFmR6Dc6e+0FXkSmAViZBvtAzUa/MvHklTIivoLI+lSo7j1BGsR0mhBTYU1gvp7hKEy9mU74ZxFIzYkviPljbA9r3Vku5Zby9ZoXUz+TNtLnBwF7JF450QHXn9AVQPhBd4InMrwANngE4ppFlZP7UTORj+Du273htT3CKiEVSNqeViydc9ehzoO4zMuUTMm26WeogKyFFnWw7xyYphrBmKy+DL/cfsNy7jbBUR1DLmWt3lnzkuPzofO4BZl+A==
- Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=HARGsOKu8jZHnVsmGeA4zYrAP9KBnsvp3XWFUsnzJXacNaQSQJaYE5v9bsxLJoTeVvQnb8qgnWC7Otzcepu+Tj5Du3lTSEb8fZbeoRn+X/qzXcW/gSOVhhyTCbc0Vs+ZFuF57zNdz53Ak+1ug4Bm0ja2Bjw9F+wlPlcdGyoHvE7pkYAFl5BR6yHJKLJzT4i0RChI0zqBC5YEXyE0k+ku9yra8u3IdISbkvQ+RN10y7Y5u1KBVAUTH9yxjEjiDbWTXSF78fPgAFMnmfdx9WkCD92jWbhlHC/7zw1iBDJbXyhbrlrliLpXqRuAeYnY+sCAwR3sY90M2wXtS31DpBGTxw==
- Cc: Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, "moderated list:XEN HYPERVISOR INTERFACE" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Tue, 29 Nov 2022 16:30:29 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 11/29/22 10:00 AM, Per Bilse wrote:
+static ssize_t flags_show(struct hyp_sysfs_attr *attr, char *buffer)
+{
+ static char const *const sifstr[SIFN_NUM_SIFN] = {
+ [SIFN_PRIV] = "privileged",
+ [SIFN_INIT] = "initdomain",
+ [SIFN_MULTI] = "multiboot",
+ [SIFN_PFN] = "mod_start_pfn",
+ [SIFN_VIRT] = "virtmap"
+ };
+ unsigned sifnum, sifmask;
+ ssize_t ret = 0;
+
+ sifmask = ~(~0U << SIFN_NUM_SIFN); // ...0000111...
+ if (xen_domain() && (xen_start_flags & sifmask) != 0) {
+ for (sifnum = 0; sifnum != SIFN_NUM_SIFN; sifnum++) {
+ if ((xen_start_flags & (1<<sifnum)) != 0)
+ ret += sprintf(buffer+ret, "%s ",
sifstr[sifnum]);
+ }
+ buffer[ret-1] = '\n';
+ }
+ return ret;
+}
Why not simply show unprocessed xen_start_flags as a hex value?
-boris
|
