From: Michael Kelley <mikelley@microsoft.com>
To: Jason@zx2c4.com, tytso@mit.edu, ardb@kernel.org,
andy.shevchenko@gmail.com, hdegoede@redhat.com, graf@amazon.com,
rafael@kernel.org, linux-kernel@vger.kernel.org
Cc: mikelley@microsoft.com
Subject: [PATCH 1/1] virt: vmgenid: Recognize new CID added by Hyper-V
Date: Thu, 24 Mar 2022 12:20:21 -0700 [thread overview]
Message-ID: <1648149621-2335-1-git-send-email-mikelley@microsoft.com> (raw)
In the Windows spec for VM Generation ID, the originally
specified CID is longer than allowed by the ACPI spec.
Hyper-V has added "VMGENCTR" as a second valid CID
that is conformant, while retaining the original CID
for compatibility with Windows guests.
Add this new CID to the list recognized by the driver.
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
---
drivers/virt/vmgenid.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/virt/vmgenid.c b/drivers/virt/vmgenid.c
index 0ae1a39..a1c467a 100644
--- a/drivers/virt/vmgenid.c
+++ b/drivers/virt/vmgenid.c
@@ -78,6 +78,7 @@ static void vmgenid_notify(struct acpi_device *device, u32 event)
}
static const struct acpi_device_id vmgenid_ids[] = {
+ { "VMGENCTR", 0 },
{ "VM_GEN_COUNTER", 0 },
{ }
};
--
1.8.3.1
next reply other threads:[~2022-03-24 19:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-24 19:20 Michael Kelley [this message]
2022-03-25 3:47 ` Jason A. Donenfeld
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