Re: [RFC PATCH v11 08/29] KVM: Introduce per-page memory attributes
From: Xiaoyao Li <hidden>
Date: 2023-07-21 15:57:00
Also in:
kvm, kvm-riscv, kvmarm, linux-fsdevel, linux-mips, linux-mm, linux-riscv, linux-security-module, linuxppc-dev, lkml
On 7/19/2023 7:44 AM, Sean Christopherson wrote:
+4.140 KVM_SET_MEMORY_ATTRIBUTES
+-----------------------------------------
+
+:Capability: KVM_CAP_MEMORY_ATTRIBUTES
+:Architectures: x86
+:Type: vm ioctl
+:Parameters: struct kvm_memory_attributes(in/out)
+:Returns: 0 on success, <0 on error
+
+Sets memory attributes for pages in a guest memory range. Parameters are
+specified via the following structure::
+
+ struct kvm_memory_attributes {
+ __u64 address;
+ __u64 size;
+ __u64 attributes;
+ __u64 flags;
+ };
+
+The user sets the per-page memory attributes to a guest memory range indicated
+by address/size, and in return KVM adjusts address and size to reflect the
+actual pages of the memory range have been successfully set to the attributes.
+If the call returns 0, "address" is updated to the last successful address + 1
+and "size" is updated to the remaining address size that has not been set
+successfully. The user should check the return value as well as the size to
+decide if the operation succeeded for the whole range or not. The user may want
+to retry the operation with the returned address/size if the previous range was
+partially successful.This does not match with the implementation. Please fix either one to make them consistent. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel