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KVM: x86: cleanup SIGBUS handlers 

This patch should have no semantic change.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-02-08 14:25:49 +01:00
parent d98d407234
commit 20e0ff59a9
1 changed files with 45 additions and 42 deletions
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87
target/i386/kvm.c
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@ -469,31 +469,34 @@ int kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr)
ram_addr_t ram_addr;
hwaddr paddr;
if ((env->mcg_cap & MCG_SER_P) && addr
&& (code == BUS_MCEERR_AR || code == BUS_MCEERR_AO)) {
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)) {
fprintf(stderr, "Hardware memory error for memory used by "
"QEMU itself instead of guest system!\n");
/* Hope we are lucky for AO MCE */
if (code == BUS_MCEERR_AO) {
return 0;
} else {
hardware_memory_error();
}
}
kvm_hwpoison_page_add(ram_addr);
kvm_mce_inject(cpu, paddr, code);
} else {
if (code == BUS_MCEERR_AO) {
return 0;
} else if (code == BUS_MCEERR_AR) {
hardware_memory_error();
} else {
return 1;
}
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 ((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;
}
fprintf(stderr, "Hardware memory error for memory used by "
"QEMU itself instead of guest system!\n");
}
if (code == BUS_MCEERR_AR) {
hardware_memory_error();
}
/* Hope we are lucky for AO MCE */
return 0;
}
@ -501,29 +504,29 @@ int kvm_arch_on_sigbus(int code, void *addr)
{
X86CPU *cpu = X86_CPU(first_cpu);
if ((cpu->env.mcg_cap & MCG_SER_P) && addr && code == BUS_MCEERR_AO) {
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;
/* Hope we are lucky for AO MCE */
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)) {
fprintf(stderr, "Hardware memory error for memory used by "
"QEMU itself instead of guest system!: %p\n", addr);
return 0;
}
kvm_hwpoison_page_add(ram_addr);
kvm_mce_inject(X86_CPU(first_cpu), paddr, code);
} else {
if (code == BUS_MCEERR_AO) {
return 0;
} else if (code == BUS_MCEERR_AR) {
hardware_memory_error();
} else {
return 1;
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;
}