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| author | Keir Fraser <keir.fraser@citrix.com> | 2009-02-05 12:14:09 +0000 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2009-02-05 12:14:09 +0000 |
| commit | 38651997ed10ad12c9dc9aebe04217fd0dd76bb6 (patch) | |
| tree | 4756bd1d2b124d551bef25492830abda42e1fb66 /xen/arch/x86/acpi/suspend.c | |
| parent | 345dd80d935ac1db3caff05b5cf59fc6a859c772 (diff) | |
| download | xen-38651997ed10ad12c9dc9aebe04217fd0dd76bb6.tar.gz xen-38651997ed10ad12c9dc9aebe04217fd0dd76bb6.tar.bz2 xen-38651997ed10ad12c9dc9aebe04217fd0dd76bb6.zip | |
x86: recover pat value for bsp after S3 resume.
host pat is set to cover all memory types by Xen, which is
necessary to support guest mtrr/pat, especially when device
is passthroughed with VT-d. However pat on bsp is not=20
recovered which could make assigned device defunct after S3
resume
Signed-off-by Kevin Tian <kevin.tian@intel.com>
Diffstat (limited to 'xen/arch/x86/acpi/suspend.c')
| -rw-r--r-- | xen/arch/x86/acpi/suspend.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/xen/arch/x86/acpi/suspend.c b/xen/arch/x86/acpi/suspend.c index 3068590f70..e8a39fc6bc 100644 --- a/xen/arch/x86/acpi/suspend.c +++ b/xen/arch/x86/acpi/suspend.c @@ -65,6 +65,9 @@ void restore_rest_processor_state(void) /* Reload FPU state on next FPU use. */ stts(); + if (cpu_has_pat) + wrmsrl(MSR_IA32_CR_PAT, host_pat); + mtrr_ap_init(); mcheck_init(&boot_cpu_data); } |