Joerg Roedel wrote:
If userspace knows that the kernel part supports 1GB pages it can enable
the corresponding cpuid bit so that guests actually use GB pages.
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index a1df2a3..6593198 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -542,6 +542,8 @@ struct kvm_x86_ops {
int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
int (*get_tdp_level)(void);
int (*get_mt_mask_shift)(void);
+
+ bool (*gb_page_enable)(void);
};
Should enable unconditionally. Of course we need to find the shadow bug
first, may be the has_wrprotected thingy.
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index ee755e2..e79eb26 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -413,6 +413,7 @@ struct kvm_trace_rec {
#define KVM_CAP_DEVICE_MSIX 28
#endif
#define KVM_CAP_ASSIGN_DEV_IRQ 29
+#define KVM_CAP_1GB_PAGES 30
#ifdef KVM_CAP_IRQ_ROUTING
Need KVM_GET_SUPPORTED_CPUID2 support as well.
--
error compiling committee.c: too many arguments to function
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