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[PATCH 09/17] kvm: arm: require KVM_CAP_SET_VCPU_EVENTS
From: |
Paolo Bonzini |
Subject: |
[PATCH 09/17] kvm: arm: require KVM_CAP_SET_VCPU_EVENTS |
Date: |
Wed, 18 Oct 2023 18:37:20 +0200 |
KVM_CAP_SET_VCPU_EVENTS was added in Linux 4.19, released in 2018.
It was backported to RHEL8's 4.18 kernel and is in other supported distros
as well.
While it is nice that QEMU can run even on older kernels, for example
on boards that can only run old vendor kernels, I don't think this should
extend to ancient versions of KVM/ARM which, at the time, was still
moving pretty fast. As a reference, 4.19 still had 32-bit
KVM support.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
target/arm/kvm.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index b66b936a958..a50e975181f 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -34,6 +34,7 @@
#include "qemu/log.h"
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
+ KVM_CAP_INFO(VCPU_EVENTS),
KVM_CAP_LAST_INFO
};
@@ -756,10 +757,6 @@ int kvm_put_vcpu_events(ARMCPU *cpu)
struct kvm_vcpu_events events;
int ret;
- if (!kvm_has_vcpu_events()) {
- return 0;
- }
-
memset(&events, 0, sizeof(events));
events.exception.serror_pending = env->serror.pending;
@@ -785,10 +782,6 @@ int kvm_get_vcpu_events(ARMCPU *cpu)
struct kvm_vcpu_events events;
int ret;
- if (!kvm_has_vcpu_events()) {
- return 0;
- }
-
memset(&events, 0, sizeof(events));
ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_VCPU_EVENTS, &events);
if (ret) {
@@ -927,7 +920,6 @@ static int kvm_arm_handle_dabt_nisv(CPUState *cs, uint64_t
esr_iss,
* synchronization can be exceptionally skipped.
*/
events.exception.ext_dabt_pending = 1;
- /* KVM_CAP_ARM_INJECT_EXT_DABT implies KVM_CAP_VCPU_EVENTS */
if (!kvm_vcpu_ioctl(cs, KVM_SET_VCPU_EVENTS, &events)) {
env->ext_dabt_raised = 1;
return 0;
--
2.41.0
- [PATCH 01/17] kvm: remove unnecessary stub, (continued)
- [PATCH 01/17] kvm: remove unnecessary stub, Paolo Bonzini, 2023/10/18
- [PATCH 02/17] kvm: require KVM_CAP_INTERNAL_ERROR_DATA, Paolo Bonzini, 2023/10/18
- [PATCH 06/17] kvm: assume that many ioeventfds can be created, Paolo Bonzini, 2023/10/18
- [PATCH 04/17] kvm: require KVM_CAP_IRQFD for kernel irqchip, Paolo Bonzini, 2023/10/18
- [PATCH 05/17] kvm: drop reference to KVM_CAP_PCI_2_3, Paolo Bonzini, 2023/10/18
- [PATCH 03/17] kvm: require KVM_CAP_SIGNAL_MSI, Paolo Bonzini, 2023/10/18
- [PATCH 07/17] kvm: require KVM_CAP_IOEVENTFD and KVM_CAP_IOEVENTFD_ANY_LENGTH, Paolo Bonzini, 2023/10/18
- [PATCH 09/17] kvm: arm: require KVM_CAP_SET_VCPU_EVENTS,
Paolo Bonzini <=
- [PATCH 08/17] kvm: unify listeners for PIO address space, Paolo Bonzini, 2023/10/18
- [PATCH 12/17] kvm: i386: require KVM_CAP_XSAVE, Paolo Bonzini, 2023/10/18
- [PATCH 15/17] kvm: i386: require KVM_CAP_ADJUST_CLOCK, Paolo Bonzini, 2023/10/18
- [PATCH 16/17] kvm: i386: require KVM_CAP_SET_IDENTITY_MAP_ADDR, Paolo Bonzini, 2023/10/18
- [PATCH 10/17] kvm: i386: move KVM_CAP_IRQ_ROUTING detection to kvm_arch_required_capabilities, Paolo Bonzini, 2023/10/18
- [PATCH 13/17] kvm: i386: require KVM_CAP_SET_VCPU_EVENTS and KVM_CAP_X86_ROBUST_SINGLESTEP, Paolo Bonzini, 2023/10/18
- [PATCH 14/17] kvm: i386: require KVM_CAP_MCE, Paolo Bonzini, 2023/10/18
- [PATCH 17/17] kvm: i8254: require KVM_CAP_PIT2 and KVM_CAP_PIT_STATE2, Paolo Bonzini, 2023/10/18
- [PATCH 11/17] kvm: i386: require KVM_CAP_DEBUGREGS, Paolo Bonzini, 2023/10/18