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authorkonrad@kernel.org <konrad@kernel.org>2013-04-05 16:42:24 -0400
committerH. Peter Anvin <hpa@linux.intel.com>2013-04-11 15:41:15 -0700
commit4d681be3c33dd74efffbe2a8f70634f7128602ec (patch)
treebedae6990d10b9e137ea80c12f5746c14907120f /drivers
parent357d122670937c35b33d99c46356ef2b63182a1f (diff)
downloadvexpress-lsk-4d681be3c33dd74efffbe2a8f70634f7128602ec.tar.gz
x86, wakeup, sleep: Use pvops functions for changing GDT entries
We check the TSS descriptor before we try to dereference it. Also we document what the value '9' actually means using the AMD64 Architecture Programmer's Manual Volume 2, pg 90: "Hex value 9: Available 64-bit TSS" and pg 91: "The available 32-bit TSS (09h), which is redefined as the available 64-bit TSS." Without this, on Xen, where the GDT is available as R/O (to protect the hypervisor from the guest modifying it), we end up with a pagetable fault. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Link: http://lkml.kernel.org/r/1365194544-14648-5-git-send-email-konrad.wilk@oracle.com Cc: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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