linux-kernel - [PATCH v19 021/130] KVM: x86/vmx: initialize loaded_vmcss_on_cpu in vmx

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <c1b7f0e5c2476f9f565acda5c1e746b8d181499b.1708933498.git.isaku.yamahata@intel.com>
Date: Mon, 26 Feb 2024 00:25:23 -0800
From: isaku.yamahata@...el.com
To: kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: isaku.yamahata@...el.com,
	isaku.yamahata@...il.com,
	Paolo Bonzini <pbonzini@...hat.com>,
	erdemaktas@...gle.com,
	Sean Christopherson <seanjc@...gle.com>,
	Sagi Shahar <sagis@...gle.com>,
	Kai Huang <kai.huang@...el.com>,
	chen.bo@...el.com,
	hang.yuan@...el.com,
	tina.zhang@...el.com,
	Yuan Yao <yuan.yao@...el.com>
Subject: [PATCH v19 021/130] KVM: x86/vmx: initialize loaded_vmcss_on_cpu in vmx_init()

From: Isaku Yamahata <isaku.yamahata@...el.com>

vmx_hardware_disable() accesses loaded_vmcss_on_cpu via
hardware_disable_all().  To allow hardware_enable/disable_all() before
kvm_init(), initialize it in before kvm_x86_vendor_init() in vmx_init()
so that tdx module initialization, hardware_setup method, can reference
the variable.

Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
Reviewed-by: Yuan Yao <yuan.yao@...el.com>

---
v19:
- Fix the subject to match the patch by Yuan

v18:
- Move the vmcss_on_cpu initialization from vmx_hardware_setup() to
  early point of vmx_init() by Binbin

Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
---
 arch/x86/kvm/vmx/vmx.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 434f5aaef030..8af0668e4dca 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -8539,6 +8539,10 @@ static int __init vmx_init(void)
 	 */
 	hv_init_evmcs();
 
+	/* vmx_hardware_disable() accesses loaded_vmcss_on_cpu. */
+	for_each_possible_cpu(cpu)
+		INIT_LIST_HEAD(&per_cpu(loaded_vmcss_on_cpu, cpu));
+
 	r = kvm_x86_vendor_init(&vt_init_ops);
 	if (r)
 		return r;
@@ -8554,11 +8558,8 @@ static int __init vmx_init(void)
 	if (r)
 		goto err_l1d_flush;
 
-	for_each_possible_cpu(cpu) {
-		INIT_LIST_HEAD(&per_cpu(loaded_vmcss_on_cpu, cpu));
-
+	for_each_possible_cpu(cpu)
 		pi_init_cpu(cpu);
-	}
 
 	cpu_emergency_register_virt_callback(vmx_emergency_disable);
 
-- 
2.25.1