linux-kernel - [RFC KVM 20/27] kvm/isolation: initialize the KVM page table with vmx specific data

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Date:   Mon, 13 May 2019 16:38:28 +0200
From:   Alexandre Chartre <alexandre.chartre@...cle.com>
To:     pbonzini@...hat.com, rkrcmar@...hat.com, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        dave.hansen@...ux.intel.com, luto@...nel.org, peterz@...radead.org,
        kvm@...r.kernel.org, x86@...nel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     konrad.wilk@...cle.com, jan.setjeeilers@...cle.com,
        liran.alon@...cle.com, jwadams@...gle.com,
        alexandre.chartre@...cle.com
Subject: [RFC KVM 20/27] kvm/isolation: initialize the KVM page table with vmx specific data

In addition of core memory mappings, the KVM page table has to be
initialized with vmx specific data.

Signed-off-by: Alexandre Chartre <alexandre.chartre@...cle.com>
---
 arch/x86/kvm/vmx/vmx.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 0c955bb..f181b3c 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -63,6 +63,7 @@
 #include "vmcs12.h"
 #include "vmx.h"
 #include "x86.h"
+#include "isolation.h"
 
 MODULE_AUTHOR("Qumranet");
 MODULE_LICENSE("GPL");
@@ -7830,6 +7831,24 @@ static int __init vmx_init(void)
 		}
 	}
 
+	if (kvm_isolation()) {
+		pr_debug("mapping vmx init");
+		/* copy mapping of the current module (kvm_intel) */
+		r = kvm_copy_module_mapping();
+		if (r) {
+			vmx_exit();
+			return r;
+		}
+		if (vmx_l1d_flush_pages) {
+			r = kvm_copy_ptes(vmx_l1d_flush_pages,
+					  PAGE_SIZE << L1D_CACHE_ORDER);
+			if (r) {
+				vmx_exit();
+				return r;
+			}
+		}
+	}
+
 #ifdef CONFIG_KEXEC_CORE
 	rcu_assign_pointer(crash_vmclear_loaded_vmcss,
 			   crash_vmclear_local_loaded_vmcss);
-- 
1.7.1