From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mukesh Rathor Subject: [PATCH] pvh: set cr4 flags for APs Date: Wed, 29 Jan 2014 16:15:18 -0800 Message-ID: <1391040918-11722-2-git-send-email-mukesh.rathor@oracle.com> References: <1391040918-11722-1-git-send-email-mukesh.rathor@oracle.com> Return-path: In-Reply-To: <1391040918-11722-1-git-send-email-mukesh.rathor@oracle.com> Sender: linux-kernel-owner@vger.kernel.org To: konrad.wilk@oracle.com Cc: roger.pau@citrix.com, Xen-devel@lists.xensource.com, linux-kernel@vger.kernel.org List-Id: xen-devel@lists.xenproject.org We need to set cr4 flags for APs that are already set for BSP. Signed-off-by: Mukesh Rathor --- 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