linux-kernel - [PATCH v4 05/12] KVM: Documentation: document KVM_GMEM_NO_DIRECT

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Message-ID: <20250221160728.1584559-6-roypat@amazon.co.uk>
Date: Fri, 21 Feb 2025 16:07:18 +0000
From: Patrick Roy <roypat@...zon.co.uk>
To: <rppt@...nel.org>, <david@...hat.com>, <seanjc@...gle.com>
CC: Patrick Roy <roypat@...zon.co.uk>, <pbonzini@...hat.com>,
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Subject: [PATCH v4 05/12] KVM: Documentation: document KVM_GMEM_NO_DIRECT_MAP flag

Signed-off-by: Patrick Roy <roypat@...zon.co.uk>
---
 Documentation/virt/kvm/api.rst | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index 2b52eb77e29c..fc0d2314fae6 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -6388,6 +6388,19 @@ a single guest_memfd file, but the bound ranges must not overlap).
 
 See KVM_SET_USER_MEMORY_REGION2 for additional details.
 
+The following flags are defined:
+
+KVM_GMEM_NO_DIRECT_MAP
+   Ensure memory backing this guest_memfd inode is unmapped from the kernel's
+   address space. Check KVM_CAP_GMEM_NO_DIRECT_MAP for support.
+
+Errors:
+
+  ========== ===============================================================
+  EINVAL     The specified `flags` were invalid or not supported.
+  ========== ===============================================================
+
+
 4.143 KVM_PRE_FAULT_MEMORY
 ---------------------------
 
-- 
2.48.1