[Xen-devel] [PATCH] pvh: set cr4 flags for APs

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

We need to set cr4 flags for APs that are already set for BSP.

Signed-off-by: Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>
---
 arch/x86/xen/enlighten.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index a4d7b64..201d09a 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1473,6 +1473,18 @@ static void xen_pvh_set_cr_flags(int cpu)
         * X86_CR0_TS, X86_CR0_PE, X86_CR0_ET are set by Xen for HVM guests
         * (which PVH shared codepaths), while X86_CR0_PG is for PVH. */
        write_cr0(read_cr0() | X86_CR0_MP | X86_CR0_NE | X86_CR0_WP | 
X86_CR0_AM);
+
+       if (!cpu)
+               return;
+       /*
+        * For BSP, PSE PGE are set in probe_page_size_mask(), for APs
+        * set them here. For all, OSFXSR OSXMMEXCPT are set in fpu_init.
+       */
+       if (cpu_has_pse)
+               set_in_cr4(X86_CR4_PSE);
+
+       if (cpu_has_pge)
+               set_in_cr4(X86_CR4_PGE);
 }
 
 /*
-- 
1.7.2.3


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