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| author | Juergen Gross <jgross@suse.com> | 2023-06-15 15:39:59 +0300 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-06-16 12:22:33 +0300 |
| commit | 30d65d1b19850c9bc8c17dba8ebe9be5e0c17054 (patch) | |
| tree | a407091cb50a0038b232a88e7867313ab51ec5e8 | |
| parent | 7c1dee734f3b8003429c40fb9186401485670dfd (diff) | |
| download | linux-30d65d1b19850c9bc8c17dba8ebe9be5e0c17054.tar.xz | |
x86/xen: Set default memory type for PV guests to WB
When running as an unprivileged PV guest under Xen (not dom0), the
default MTRR memory type should be write-back.
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20230615123959.12298-1-jgross@suse.com
| -rw-r--r-- | arch/x86/xen/enlighten_pv.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index 8732b85d5650..93b658248d01 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -187,6 +187,8 @@ static void __init xen_pv_init_platform(void) if (xen_initial_domain()) xen_set_mtrr_data(); + else + mtrr_overwrite_state(NULL, 0, MTRR_TYPE_WRBACK); } static void __init xen_pv_guest_late_init(void) |