From: isaku.yamahata@intel.com
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>
Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com,
Kai Huang <kai.huang@intel.com>, Chao Gao <chao.gao@intel.com>,
Atish Patra <atishp@atishpatra.org>,
Shaokun Zhang <zhangshaokun@hisilicon.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Huang Ying <ying.huang@intel.com>,
Huacai Chen <chenhuacai@kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
Borislav Petkov <bp@alien8.de>
Subject: [PATCH v5 12/30] KVM: Add arch hook for suspend
Date: Thu, 22 Sep 2022 11:20:41 -0700 [thread overview]
Message-ID: <ad5635d3477a14c8084ce85f2031308d3a9dc381.1663869838.git.isaku.yamahata@intel.com> (raw)
In-Reply-To: <cover.1663869838.git.isaku.yamahata@intel.com>
From: Isaku Yamahata <isaku.yamahata@intel.com>
Factor out the logic on suspend event as arch callback. Later kvm/x86 will
override it.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
---
include/linux/kvm_host.h | 1 +
virt/kvm/kvm_main.c | 21 ++++++++++++---------
2 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 084ee8a13e9f..861aad8812ff 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1435,6 +1435,7 @@ static inline void kvm_create_vcpu_debugfs(struct kvm_vcpu *vcpu) {}
#endif
int kvm_arch_reboot(int val);
+int kvm_arch_suspend(int usage_count);
int kvm_arch_hardware_enable(void);
void kvm_arch_hardware_disable(void);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 58385000b73f..0ebe43a695e5 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1148,6 +1148,17 @@ int __weak kvm_arch_reboot(int val)
return NOTIFY_OK;
}
+int __weak kvm_arch_suspend(int usage_count)
+{
+ if (usage_count)
+ /*
+ * Because kvm_suspend() is called with interrupt disabled, no
+ * need to disable preemption.
+ */
+ hardware_disable_nolock(NULL);
+ return 0;
+}
+
/*
* Called just after removing the VM from the vm_list, but before doing any
* other destruction.
@@ -5753,15 +5764,7 @@ static int kvm_suspend(void)
* locking.
*/
lockdep_assert_not_held(&kvm_lock);
-
- if (kvm_usage_count) {
- /*
- * Because kvm_suspend() is called with interrupt disabled, no
- * need to disable preemption.
- */
- hardware_disable_nolock(NULL);
- }
- return 0;
+ return kvm_arch_suspend(kvm_usage_count);
}
static void kvm_resume(void)
--
2.25.1
next prev parent reply other threads:[~2022-09-22 18:22 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-22 18:20 [PATCH v5 00/30] KVM: hardware enable/disable reorganize isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 01/30] KVM: x86: Drop kvm_user_return_msr_cpu_online() isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 02/30] KVM: x86: Use this_cpu_ptr() instead of per_cpu_ptr(smp_processor_id()) isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 03/30] KVM: x86: Move check_processor_compatibility from init ops to runtime ops isaku.yamahata
2022-10-11 19:53 ` Sean Christopherson
2022-09-22 18:20 ` [PATCH v5 04/30] Partially revert "KVM: Pass kvm_init()'s opaque param to additional arch funcs" isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 05/30] KVM: Provide more information in kernel log if hardware enabling fails isaku.yamahata
2022-10-12 19:45 ` Sean Christopherson
2022-09-22 18:20 ` [PATCH v5 06/30] KVM: arm64: Simplify the CPUHP logic isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 07/30] KVM: Rename and move CPUHP_AP_KVM_STARTING to ONLINE section isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 08/30] KVM: Do compatibility checks on hotplugged CPUs isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 09/30] KVM: Drop kvm_count_lock and instead protect kvm_usage_count with kvm_lock isaku.yamahata
2022-10-12 20:14 ` Sean Christopherson
2022-09-22 18:20 ` [PATCH v5 10/30] KVM: Add arch hooks when VM is added/deleted isaku.yamahata
2022-10-04 0:16 ` Isaku Yamahata
2022-10-12 20:43 ` Sean Christopherson
2022-09-22 18:20 ` [PATCH v5 11/30] KVM: Add arch hook for reboot event isaku.yamahata
2022-10-12 20:47 ` Sean Christopherson
2022-09-22 18:20 ` isaku.yamahata [this message]
2022-09-22 18:20 ` [PATCH v5 13/30] KVM: Add arch hook for resume event isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 14/30] KVM: Add arch hook for cpu online event isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 15/30] KVM: Add arch hook for cpu offline event isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 16/30] KVM: Remove on_each_cpu(hardware_disable_nolock) in kvm_exit() isaku.yamahata
2022-10-12 20:50 ` Sean Christopherson
2022-09-22 18:20 ` [PATCH v5 17/30] KVM: Move out KVM arch PM hooks and hardware enable/disable logic isaku.yamahata
2022-10-12 21:10 ` Sean Christopherson
2022-09-22 18:20 ` [PATCH v5 18/30] KVM: kvm_arch.c: Remove _nolock post fix isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 19/30] KVM: kvm_arch.c: Remove a global variable, hardware_enable_failed isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 20/30] KVM: Introduce an arch wrapper to check all processor compatibility isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 21/30] KVM: x86: Duplicate arch callbacks related to pm events and compat check isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 22/30] KVM: x86: Move TSC fixup logic to KVM arch resume callback isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 23/30] KVM: Eliminate kvm_arch_post_init_vm() isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 24/30] KVM: Add config to not compile kvm_arch.c isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 25/30] KVM: x86: Delete kvm_arch_hardware_enable/disable() isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 26/30] KVM: x86: Make x86 processor compat check callback empty isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 27/30] RFC: KVM: powerpc: Move processor compatibility check to hardware setup isaku.yamahata
2022-09-23 6:58 ` Michael Ellerman
2022-09-27 0:40 ` Isaku Yamahata
2022-09-22 18:20 ` [PATCH v5 28/30] KVM: Eliminate kvm_arch_check_processor_compat() isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 29/30] RFC: KVM: x86: Remove cpus_hardware_enabled and related sanity check isaku.yamahata
2022-09-22 18:20 ` [PATCH v5 30/30] RFC: KVM: " isaku.yamahata
2022-10-13 0:25 ` [PATCH v5 00/30] KVM: hardware enable/disable reorganize Sean Christopherson
2022-10-14 4:04 ` Sean Christopherson
2022-11-02 18:02 ` Paolo Bonzini
2022-11-02 18:59 ` Sean Christopherson
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