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[Qemu-devel] [PATCH 7/7] kvm-i386: register SMRAM regions with KVM_MEM_X
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 7/7] kvm-i386: register SMRAM regions with KVM_MEM_X86_SMRAM |
Date: |
Fri, 15 May 2015 18:37:03 +0200 |
This patch adds SMRAM regions to the KVM CPU address space. The
/machine/smram container has KVM_MEM_X86_SMRAM set in the
memory flags, and this flag is propagated to the memory slot.
Signed-off-by: Paolo Bonzini <address@hidden>
---
target-i386/kvm.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 09b4fc7..224f8db 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -87,6 +87,8 @@ static bool has_msr_xss;
static bool has_msr_architectural_pmu;
static uint32_t num_architectural_pmu_counters;
+static Notifier smram_machine_done;
+
bool kvm_allows_irq0_override(void)
{
return !kvm_irqchip_in_kernel() || kvm_has_gsi_routing();
@@ -846,6 +848,25 @@ static int kvm_get_supported_msrs(KVMState *s)
return ret;
}
+static void smram_notify(Notifier *n, void *unused)
+{
+ MemoryRegion *smram =
+ (MemoryRegion *) object_resolve_path("/machine/smram", NULL);
+
+ if (!smram) {
+ return;
+ }
+
+ /* Add the SMRAM regions to the KVM address space, so that they will
+ * be considered when adding memory slots.
+ *
+ * This requires that the chipsets *disables* regions in /machine/smram
+ * whenever SMRAM is opened.
+ */
+ memory_region_add_subregion_overlap(&kvm_state->kvm_as_root, 0, smram, 10);
+ smram->kvm_mem_flags |= KVM_MEM_X86_SMRAM;
+}
+
int kvm_arch_init(MachineState *ms, KVMState *s)
{
uint64_t identity_base = 0xfffbc000;
@@ -904,6 +925,12 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
return ret;
}
}
+
+ if (kvm_check_extension(s, KVM_CAP_X86_SMM)) {
+ smram_machine_done.notify = smram_notify;
+ qemu_add_machine_init_done_notifier(&smram_machine_done);
+ }
+
return 0;
}
--
1.8.3.1
- [Qemu-devel] [RFC PATCH 0/7] x86: SMRAM implementation for KVM, Paolo Bonzini, 2015/05/15
- [Qemu-devel] [PATCH 2/7] kvm-all: remove useless typedef, Paolo Bonzini, 2015/05/15
- [Qemu-devel] [PATCH 1/7] kvm-all: put kvm_mem_flags to more work, Paolo Bonzini, 2015/05/15
- [Qemu-devel] [PATCH 3/7] kvm-all: move KVMState definitions to kvm_int.h, Paolo Bonzini, 2015/05/15
- [Qemu-devel] [PATCH 4/7] kvm-all: add KVM address space, Paolo Bonzini, 2015/05/15
- [Qemu-devel] [PATCH 5/7] memory: add kvm_mem_flags to MemoryRegion, Paolo Bonzini, 2015/05/15
- [Qemu-devel] [PATCH 7/7] kvm-i386: register SMRAM regions with KVM_MEM_X86_SMRAM,
Paolo Bonzini <=
- [Qemu-devel] [PATCH 6/7] i386: disable the region in /machine/smram when SMRAM is open, Paolo Bonzini, 2015/05/15