52 lines
1.6 KiB
Diff
52 lines
1.6 KiB
Diff
From 209211d53a25123335a3d851fbb15eb69d2fe779 Mon Sep 17 00:00:00 2001
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From: Jason Chen CJ <jason.cj.chen@intel.com>
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Date: Fri, 31 Aug 2018 10:58:57 +0800
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Subject: [PATCH 367/550] VHM: check HV api version for VHM module init
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Change-Id: I8d49db28e235fe643380b4e8b82fb629e89accaf
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Tracked-On: 218802
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Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
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Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
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---
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drivers/char/vhm/vhm_dev.c | 18 ++++++++++++++++++
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1 file changed, 18 insertions(+)
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diff --git a/drivers/char/vhm/vhm_dev.c b/drivers/char/vhm/vhm_dev.c
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index 7894297ca872..88fb0faf19fc 100644
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--- a/drivers/char/vhm/vhm_dev.c
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+++ b/drivers/char/vhm/vhm_dev.c
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@@ -565,12 +565,30 @@ static const struct file_operations fops = {
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.poll = vhm_dev_poll,
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};
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+#define SUPPORT_HV_API_VERSION_MAJOR 1
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+#define SUPPORT_HV_API_VERSION_MINOR 0
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static int __init vhm_init(void)
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{
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unsigned long flag;
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+ struct hc_api_version api_version = {0, 0};
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pr_info("vhm: initializing\n");
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+ if (hcall_get_api_version(virt_to_phys(&api_version)) < 0) {
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+ pr_err("vhm: failed to get api version from Hypervisor !\n");
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+ return -EINVAL;
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+ }
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+
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+ if (api_version.major_version == SUPPORT_HV_API_VERSION_MAJOR &&
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+ api_version.minor_version == SUPPORT_HV_API_VERSION_MINOR) {
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+ pr_info("vhm: hv api version %d.%d\n",
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+ api_version.major_version, api_version.minor_version);
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+ } else {
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+ pr_err("vhm: not support hv api version %d.%d!\n",
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+ api_version.major_version, api_version.minor_version);
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+ return -EINVAL;
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+ }
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+
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/* Try to dynamically allocate a major number for the device */
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major = register_chrdev(0, DEVICE_NAME, &fops);
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if (major < 0) {
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--
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2.19.1
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