diff options
| author | Sean Christopherson <seanjc@google.com> | 2025-08-27 17:01:53 -0700 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2025-09-30 22:50:18 +0000 |
| commit | 6d0386ea99875313fdfd074eb74013b6e3b48a76 (patch) | |
| tree | 2ab67bd74f52f15aa71173d95bf4d89ba11e94d4 /include/linux/kvm_host.h | |
| parent | 0ebac01a00be972020c002a7fe0bb6b6fca8410f (diff) | |
entry/kvm: KVM: Move KVM details related to signal/-EINTR into KVM proper
Move KVM's morphing of pending signals into userspace exits into KVM
proper, and drop the @vcpu param from xfer_to_guest_mode_handle_work().
How KVM responds to -EINTR is a detail that really belongs in KVM itself,
and invoking kvm_handle_signal_exit() from kernel code creates an inverted
module dependency. E.g. attempting to move kvm_handle_signal_exit() into
kvm_main.c would generate an linker error when building kvm.ko as a module.
Dropping KVM details will also converting the KVM "entry" code into a more
generic virtualization framework so that it can be used when running as a
Hyper-V root partition.
Lastly, eliminating usage of "struct kvm_vcpu" outside of KVM is also nice
to have for KVM x86 developers, as keeping the details of kvm_vcpu purely
within KVM allows changing the layout of the structure without having to
boot into a new kernel, e.g. allows rebuilding and reloading kvm.ko with a
modified kvm_vcpu structure as part of debug/development.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'include/linux/kvm_host.h')
| -rw-r--r-- | include/linux/kvm_host.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 15656b7fba6c..598b9473e46d 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -2,7 +2,7 @@ #ifndef __KVM_HOST_H #define __KVM_HOST_H - +#include <linux/entry-kvm.h> #include <linux/types.h> #include <linux/hardirq.h> #include <linux/list.h> @@ -2450,6 +2450,17 @@ static inline void kvm_handle_signal_exit(struct kvm_vcpu *vcpu) vcpu->run->exit_reason = KVM_EXIT_INTR; vcpu->stat.signal_exits++; } + +static inline int kvm_xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu) +{ + int r = xfer_to_guest_mode_handle_work(); + + if (r) { + WARN_ON_ONCE(r != -EINTR); + kvm_handle_signal_exit(vcpu); + } + return r; +} #endif /* CONFIG_KVM_XFER_TO_GUEST_WORK */ /* |