On 04/27/2010 01:38 PM, Joerg Roedel wrote:
This patch introduces two fields in vcpu_arch for x86:
* fault_address
* fault_error_code
This will be used to correctly propagate page faults back
into the guest when we could have either an ordinary page
fault or a nested page fault. In the case of a nested page
fault the fault-address is different from the original
address that should be walked. So we need to keep track
about the real fault-address.
We could also remove the current path of the error_code to
the fault. But this change is too invasive and outside the
scope of this patch set. It will be changed and tested
seperatly.
Signed-off-by: Joerg Roedel<joerg.roedel@xxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 3 +++
arch/x86/kvm/paging_tmpl.h | 4 ++++
2 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index d9dfc8c..8426870 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -298,6 +298,9 @@ struct kvm_vcpu_arch {
/* Used for two dimensional paging emulation */
struct kvm_mmu nested_mmu;
+ unsigned long fault_address;
Probably a problem on i386. How does npt handle faults when the guest
is using pae paging and the host (in our case the guest...) isn't? I
see it uses exit_info_2 for the address, which is a u64.
So we probably need to upgrade gva_t to a u64. Please send this as a
separate patch, and test on i386 hosts.
+ int fault_error_code;
unsigned.
Maybe put the two in a struct, easier to pass around.
--
error compiling committee.c: too many arguments to function
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