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[Qemu-devel] [PATCH v0 6/7] kvm: add vCPU failed memeory access processi
From: |
Denis Plotnikov |
Subject: |
[Qemu-devel] [PATCH v0 6/7] kvm: add vCPU failed memeory access processing |
Date: |
Fri, 29 Jun 2018 11:03:19 +0300 |
Is done with support of the KVM patch returning the faulting address.
Signed-off-by: Denis Plotnikov <address@hidden>
---
target/i386/kvm.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 3ac5302bc5..b87881a8f1 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -45,6 +45,8 @@
#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
#include "migration/blocker.h"
+#include "migration/savevm.h"
+#include "migration/ram.h"
#include "exec/memattrs.h"
#include "trace.h"
@@ -3130,6 +3132,18 @@ static bool host_supports_vmx(void)
return ecx & CPUID_EXT_VMX;
}
+static int kvm_handle_fail_mem_access(CPUState *cpu)
+{
+ struct kvm_run *run = cpu->kvm_run;
+ int ret = ram_process_page_fault((void*)run->fail_mem_access.hva);
+
+ if (ret >= 0) {
+ cpu_resume(cpu);
+ }
+
+ return ret;
+}
+
#define VMX_INVALID_GUEST_STATE 0x80000021
int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
@@ -3188,6 +3202,10 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run
*run)
ioapic_eoi_broadcast(run->eoi.vector);
ret = 0;
break;
+ case KVM_EXIT_FAIL_MEM_ACCESS:
+ ret = kvm_handle_fail_mem_access(cs);
+ //ret = -1; -- to prevent further execution ret = 0; -- to continue
without errors
+ break;
default:
fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason);
ret = -1;
--
2.17.0
- [Qemu-devel] [PATCH v0 0/7] Background snapshots, Denis Plotnikov, 2018/06/29
- [Qemu-devel] [PATCH v0 1/7] migration: add background snapshot capability, Denis Plotnikov, 2018/06/29
- [Qemu-devel] [PATCH v0 7/7] migration: add background snapshotting, Denis Plotnikov, 2018/06/29
- [Qemu-devel] [PATCH v0 5/7] kvm: add failed memeory access exit reason, Denis Plotnikov, 2018/06/29
- [Qemu-devel] [PATCH v0 2/7] bitops: add some atomic versions of bitmap operations, Denis Plotnikov, 2018/06/29
- [Qemu-devel] [PATCH v0 3/7] threads: add infrastructure to process sigsegv, Denis Plotnikov, 2018/06/29
- [Qemu-devel] [PATCH v0 4/7] migration: add background snapshot infrastructure, Denis Plotnikov, 2018/06/29
- [Qemu-devel] [PATCH v0 6/7] kvm: add vCPU failed memeory access processing,
Denis Plotnikov <=
- Re: [Qemu-devel] [PATCH v0 0/7] Background snapshots, Dr. David Alan Gilbert, 2018/06/29