This is a note to let you know that I've just added the patch titled
KVM: nVMX: invvpid handling improvements
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kvm-nvmx-invvpid-handling-improvements.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Fri Feb 23 17:34:09 CET 2018
From: Jack Wang <jinpu.wang@xxxxxxxxxxxxxxxx>
Date: Fri, 23 Feb 2018 11:42:18 +0100
Subject: KVM: nVMX: invvpid handling improvements
To: gregkh@xxxxxxxxxxxxxxxxxxx, stable@xxxxxxxxxxxxxxx
Cc: "Jan Dakinevich" <jan.dakinevich@xxxxxxxxx>, "Radim Krčmář" <rkrcmar@xxxxxxxxxx>, "Jack Wang" <jinpu.wang@xxxxxxxxxxxxxxxx>
Message-ID: <1519382538-15143-30-git-send-email-jinpu.wangl@xxxxxxxxxxxxxxxx>
From: Jan Dakinevich <jan.dakinevich@xxxxxxxxx>
commit bcdde302b8268ef7dbc4ddbdaffb5b44eafe9a1e upstream
- Expose all invalidation types to the L1
- Reject invvpid instruction, if L1 passed zero vpid value to single
context invalidations
Signed-off-by: Jan Dakinevich <jan.dakinevich@xxxxxxxxx>
Tested-by: Ladi Prosek <lprosek@xxxxxxxxxx>
Signed-off-by: Radim Krčmář <rkrcmar@xxxxxxxxxx>
[jwang: port to 4.4]
Signed-off-by: Jack Wang <jinpu.wang@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/vmx.c | 36 ++++++++++++++++++++++++------------
1 file changed, 24 insertions(+), 12 deletions(-)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -142,6 +142,12 @@ module_param_named(preemption_timer, ena
#define VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE 5
+#define VMX_VPID_EXTENT_SUPPORTED_MASK \
+ (VMX_VPID_EXTENT_INDIVIDUAL_ADDR_BIT | \
+ VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT | \
+ VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT | \
+ VMX_VPID_EXTENT_SINGLE_NON_GLOBAL_BIT)
+
/*
* These 2 parameters are used to config the controls for Pause-Loop Exiting:
* ple_gap: upper bound on the amount of time between two successive
@@ -2839,8 +2845,7 @@ static void nested_vmx_setup_ctls_msrs(s
*/
if (enable_vpid)
vmx->nested.nested_vmx_vpid_caps = VMX_VPID_INVVPID_BIT |
- VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT |
- VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT;
+ VMX_VPID_EXTENT_SUPPORTED_MASK;
else
vmx->nested.nested_vmx_vpid_caps = 0;
@@ -7685,7 +7690,8 @@ static int handle_invvpid(struct kvm_vcp
vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf);
- types = (vmx->nested.nested_vmx_vpid_caps >> 8) & 0x7;
+ types = (vmx->nested.nested_vmx_vpid_caps &
+ VMX_VPID_EXTENT_SUPPORTED_MASK) >> 8;
if (type >= 32 || !(types & (1 << type))) {
nested_vmx_failValid(vcpu,
@@ -7707,21 +7713,27 @@ static int handle_invvpid(struct kvm_vcp
}
switch (type) {
+ case VMX_VPID_EXTENT_INDIVIDUAL_ADDR:
case VMX_VPID_EXTENT_SINGLE_CONTEXT:
- /*
- * Old versions of KVM use the single-context version so we
- * have to support it; just treat it the same as all-context.
- */
+ case VMX_VPID_EXTENT_SINGLE_NON_GLOBAL:
+ if (!vpid) {
+ nested_vmx_failValid(vcpu,
+ VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
+ skip_emulated_instruction(vcpu);
+ return 1;
+ }
+ break;
case VMX_VPID_EXTENT_ALL_CONTEXT:
- __vmx_flush_tlb(vcpu, to_vmx(vcpu)->nested.vpid02);
- nested_vmx_succeed(vcpu);
break;
default:
- /* Trap individual address invalidation invvpid calls */
- BUG_ON(1);
- break;
+ WARN_ON_ONCE(1);
+ skip_emulated_instruction(vcpu);
+ return 1;
}
+ __vmx_flush_tlb(vcpu, vmx->nested.vpid02);
+ nested_vmx_succeed(vcpu);
+
skip_emulated_instruction(vcpu);
return 1;
}
Patches currently in stable-queue which might be from jinpu.wang@xxxxxxxxxxxxxxxx are
queue-4.9/kvm-nvmx-invvpid-handling-improvements.patch
queue-4.9/kvm-async_pf-fix-df-due-to-inject-page-not-present-and-page-ready-exceptions-simultaneously.patch
queue-4.9/kvm-vmx-clean-up-declaration-of-vpid-ept-invalidation-types.patch