From: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri, 21 Nov 2014 18:05:07 +0000 (+0100)
Subject: KVM: x86: support XSAVES usage in the host
X-Git-Tag: omap-for-v3.19/fixes-rc1~43^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df1daba7d1cb8ed7957f873cde5c9e953cbaa483;p=pandora-kernel.git

KVM: x86: support XSAVES usage in the host

Userspace is expecting non-compacted format for KVM_GET_XSAVE, but
struct xsave_struct might be using the compacted format.  Convert
in order to preserve userspace ABI.

Likewise, userspace is passing non-compacted format for KVM_SET_XSAVE
but the kernel will pass it to XRSTORS, and we need to convert back.

Fixes: f31a9f7c71691569359fa7fb8b0acaa44bce0324
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: stable@vger.kernel.org
Cc: H. Peter Anvin <hpa@linux.intel.com>
Tested-by: Nadav Amit <namit@cs.technion.ac.il>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

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