From: Zeng Guang <guang.zeng@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
kvm@vger.kernel.org, Dave Hansen <dave.hansen@linux.intel.com>,
Tony Luck <tony.luck@intel.com>,
Kan Liang <kan.liang@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Kim Phillips <kim.phillips@amd.com>,
Jarkko Sakkinen <jarkko@kernel.org>,
Jethro Beekman <jethro@fortanix.com>,
Kai Huang <kai.huang@intel.com>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
Robert Hu <robert.hu@intel.com>, Gao Chao <chao.gao@intel.com>,
Zeng Guang <guang.zeng@intel.com>
Subject: [PATCH v5 7/8] KVM: VMX: Update PID-pointer table entry when APIC ID is changed
Date: Fri, 31 Dec 2021 22:28:48 +0800 [thread overview]
Message-ID: <20211231142849.611-8-guang.zeng@intel.com> (raw)
In-Reply-To: <20211231142849.611-1-guang.zeng@intel.com>
In xAPIC mode, guest is allowed to modify APIC ID at runtime.
If IPI virtualization is enabled, corresponding entry in
PID-pointer table need change accordingly.
Signed-off-by: Zeng Guang <guang.zeng@intel.com>
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/lapic.c | 7 +++++--
arch/x86/kvm/vmx/vmx.c | 12 ++++++++++++
3 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 2164b9f4c7b0..753bf2a7cebc 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1493,6 +1493,7 @@ struct kvm_x86_ops {
int (*complete_emulated_msr)(struct kvm_vcpu *vcpu, int err);
void (*vcpu_deliver_sipi_vector)(struct kvm_vcpu *vcpu, u8 vector);
+ void (*update_ipiv_pid_entry)(struct kvm_vcpu *vcpu, u8 old_id, u8 new_id);
};
struct kvm_x86_nested_ops {
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 3ce7142ba00e..83c2c7594bcd 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2007,9 +2007,12 @@ int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val)
switch (reg) {
case APIC_ID: /* Local APIC ID */
- if (!apic_x2apic_mode(apic))
+ if (!apic_x2apic_mode(apic)) {
+ u8 old_id = kvm_lapic_get_reg(apic, APIC_ID) >> 24;
+
kvm_apic_set_xapic_id(apic, val >> 24);
- else
+ kvm_x86_ops.update_ipiv_pid_entry(apic->vcpu, old_id, val >> 24);
+ } else
ret = 1;
break;
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 2e65464d6dee..f21ce15c5eb8 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7633,6 +7633,17 @@ static void vmx_vm_destroy(struct kvm *kvm)
free_pages((unsigned long)kvm_vmx->pid_table, MAX_PID_TABLE_ORDER);
}
+static void vmx_update_ipiv_pid_entry(struct kvm_vcpu *vcpu, u8 old_id, u8 new_id)
+{
+ if (enable_ipiv && kvm_vcpu_apicv_active(vcpu)) {
+ u64 *pid_table = to_kvm_vmx(vcpu->kvm)->pid_table;
+
+ WRITE_ONCE(pid_table[old_id], 0);
+ WRITE_ONCE(pid_table[new_id], __pa(&to_vmx(vcpu)->pi_desc) |
+ PID_TABLE_ENTRY_VALID);
+ }
+}
+
static struct kvm_x86_ops vmx_x86_ops __initdata = {
.name = "kvm_intel",
@@ -7770,6 +7781,7 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
.complete_emulated_msr = kvm_complete_insn_gp,
.vcpu_deliver_sipi_vector = kvm_vcpu_deliver_sipi_vector,
+ .update_ipiv_pid_entry = vmx_update_ipiv_pid_entry,
};
static __init void vmx_setup_user_return_msrs(void)
--
2.27.0
next prev parent reply other threads:[~2021-12-31 14:59 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-31 14:28 [PATCH v5 0/8] IPI virtualization support for VM Zeng Guang
2021-12-31 14:28 ` [PATCH v5 1/8] x86/cpu: Add new VMX feature, Tertiary VM-Execution control Zeng Guang
2021-12-31 14:28 ` [PATCH v5 2/8] KVM: VMX: Extend BUILD_CONTROLS_SHADOW macro to support 64-bit variation Zeng Guang
2021-12-31 14:28 ` [PATCH v5 3/8] KVM: VMX: Detect Tertiary VM-Execution control when setup VMCS config Zeng Guang
2021-12-31 14:28 ` [PATCH v5 4/8] KVM: VMX: dump_vmcs() reports tertiary_exec_control field as well Zeng Guang
2022-01-13 21:03 ` Sean Christopherson
2022-01-14 4:19 ` Zeng Guang
2022-01-20 1:06 ` Sean Christopherson
2022-01-20 5:34 ` Zeng Guang
2021-12-31 14:28 ` [PATCH v5 5/8] KVM: x86: Support interrupt dispatch in x2APIC mode with APIC-write VM exit Zeng Guang
2022-01-13 21:29 ` Sean Christopherson
2022-01-14 7:52 ` Zeng Guang
2022-01-14 17:34 ` Sean Christopherson
2022-01-15 2:08 ` Zeng Guang
2022-01-18 0:44 ` Yuan Yao
2022-01-18 3:06 ` Zeng Guang
2022-01-18 18:17 ` Sean Christopherson
2022-01-19 2:48 ` Zeng Guang
2021-12-31 14:28 ` [PATCH v5 6/8] KVM: VMX: enable IPI virtualization Zeng Guang
2022-01-13 21:47 ` Sean Christopherson
2022-01-14 5:36 ` Zeng Guang
2021-12-31 14:28 ` Zeng Guang [this message]
2022-01-05 19:13 ` [PATCH v5 7/8] KVM: VMX: Update PID-pointer table entry when APIC ID is changed Tom Lendacky
2022-01-06 1:44 ` Zeng Guang
2022-01-06 14:06 ` Tom Lendacky
2022-01-07 8:05 ` Zeng Guang
2022-01-07 8:31 ` Maxim Levitsky
2022-01-10 7:45 ` Chao Gao
2022-01-10 22:24 ` Maxim Levitsky
2022-01-13 22:19 ` Sean Christopherson
2022-01-14 2:58 ` Chao Gao
2022-01-14 8:17 ` Maxim Levitsky
2022-01-17 3:17 ` Chao Gao
2022-02-02 23:23 ` Sean Christopherson
2022-02-03 20:22 ` Sean Christopherson
2022-02-23 6:10 ` Chao Gao
2022-02-23 10:26 ` Maxim Levitsky
2022-01-14 0:22 ` Yuan Yao
2021-12-31 14:28 ` [PATCH v5 8/8] KVM: VMX: Resize PID-ponter table on demand for IPI virtualization Zeng Guang
2022-01-13 22:09 ` Sean Christopherson
2022-01-14 15:59 ` Zeng Guang
2022-01-14 16:18 ` Sean Christopherson
2022-01-17 15:04 ` Zeng Guang
2022-01-18 17:15 ` Sean Christopherson
2022-01-19 7:55 ` Zeng Guang
2022-01-20 1:01 ` Sean Christopherson
2022-01-24 16:40 ` Zeng Guang
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