From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53415) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fYoNR-0007If-Cn for qemu-devel@nongnu.org; Fri, 29 Jun 2018 04:03:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fYoNO-0006oI-Ii for qemu-devel@nongnu.org; Fri, 29 Jun 2018 04:03:33 -0400 Received: from relay.sw.ru ([185.231.240.75]:58242) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fYoNO-0006kl-9o for qemu-devel@nongnu.org; Fri, 29 Jun 2018 04:03:30 -0400 From: Denis Plotnikov Date: Fri, 29 Jun 2018 11:03:19 +0300 Message-Id: <20180629080320.320144-7-dplotnikov@virtuozzo.com> In-Reply-To: <20180629080320.320144-1-dplotnikov@virtuozzo.com> References: <20180629080320.320144-1-dplotnikov@virtuozzo.com> Subject: [Qemu-devel] [PATCH v0 6/7] kvm: add vCPU failed memeory access processing List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: dgilbert@redhat.com, quintela@redhat.com, pbonzini@redhat.com Cc: qemu-devel@nongnu.org Is done with support of the KVM patch returning the faulting address. Signed-off-by: Denis Plotnikov --- 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