KVM: do not use sigtimedwait to catch SIGBUS

[mirror_qemu.git] / target / i386 / kvm.c

diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 0c48dfdae5fed569c0c5ba3db842e321109ca4f9..7698421ae7bf907269b5582f0e37fbffd0ae50f1 100644 (file)
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -64,13 +64,6 @@
  * 255 kvm_msr_entry structs */
 #define MSR_BUF_SIZE 4096
 
-#ifndef BUS_MCEERR_AR
-#define BUS_MCEERR_AR 4
-#endif
-#ifndef BUS_MCEERR_AO
-#define BUS_MCEERR_AO 5
-#endif
-
 const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
     KVM_CAP_INFO(SET_TSS_ADDR),
     KVM_CAP_INFO(EXT_CPUID),
@@ -462,30 +455,27 @@ static void hardware_memory_error(void)
     exit(1);
 }
 
-int kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr)
+void kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr)
 {
     X86CPU *cpu = X86_CPU(c);
     CPUX86State *env = &cpu->env;
     ram_addr_t ram_addr;
     hwaddr paddr;
 
-    if (code != BUS_MCEERR_AR && code != BUS_MCEERR_AO) {
-        return 1;
-    }
-
-    /* Because the MCE happened while running the VCPU, KVM could have
-     * injected action required MCEs too.  Action optional MCEs should
-     * be delivered to the main thread, which qemu_init_sigbus identifies
-     * as the "early kill" thread, but if we get one for whatever reason
-     * we just handle it just like the main thread would.
+    /* If we get an action required MCE, it has been injected by KVM
+     * while the VM was running.  An action optional MCE instead should
+     * be coming from the main thread, which qemu_init_sigbus identifies
+     * as the "early kill" thread.
      */
+    assert(code == BUS_MCEERR_AR || code == BUS_MCEERR_AO);
+
     if ((env->mcg_cap & MCG_SER_P) && addr) {
         ram_addr = qemu_ram_addr_from_host(addr);
         if (ram_addr != RAM_ADDR_INVALID &&
             kvm_physical_memory_addr_from_host(c->kvm_state, addr, &paddr)) {
             kvm_hwpoison_page_add(ram_addr);
             kvm_mce_inject(cpu, paddr, code);
-            return 0;
+            return;
         }
 
         fprintf(stderr, "Hardware memory error for memory used by "
@@ -497,38 +487,6 @@ int kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr)
     }
 
     /* Hope we are lucky for AO MCE */
-    return 0;
-}
-
-int kvm_arch_on_sigbus(int code, void *addr)
-{
-    X86CPU *cpu = X86_CPU(first_cpu);
-
-    if (code != BUS_MCEERR_AR && code != BUS_MCEERR_AO) {
-        return 1;
-    }
-
-    if (code == BUS_MCEERR_AR) {
-        hardware_memory_error();
-    }
-
-    /* Hope we are lucky for AO MCE */
-    if ((cpu->env.mcg_cap & MCG_SER_P) && addr) {
-        ram_addr_t ram_addr;
-        hwaddr paddr;
-
-        ram_addr = qemu_ram_addr_from_host(addr);
-        if (ram_addr != RAM_ADDR_INVALID &&
-            kvm_physical_memory_addr_from_host(first_cpu->kvm_state,
-                                               addr, &paddr)) {
-            kvm_hwpoison_page_add(ram_addr);
-            kvm_mce_inject(X86_CPU(first_cpu), paddr, code);
-        }
-
-        fprintf(stderr, "Hardware memory error for memory used by "
-                "QEMU itself instead of guest system!: %p\n", addr);
-    }
-    return 0;
 }
 
 static int kvm_inject_mce_oldstyle(X86CPU *cpu)