On 03/03/2010 09:12 PM, Joerg Roedel wrote:
This patch introduces a mmu-callback to translate gpa
addresses in the walk_addr code. This is later used to
translate l2_gpa addresses into l1_gpa addresses.
Signed-off-by: Joerg Roedel<joerg.roedel@xxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/mmu.c | 7 +++++++
arch/x86/kvm/paging_tmpl.h | 19 +++++++++++++++++++
include/linux/kvm_host.h | 5 +++++
4 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index c0b5576..76c8b5f 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -250,6 +250,7 @@ struct kvm_mmu {
void (*free)(struct kvm_vcpu *vcpu);
gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
u32 *error);
+ gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 *error);
void (*prefetch_page)(struct kvm_vcpu *vcpu,
struct kvm_mmu_page *page);
int (*sync_page)(struct kvm_vcpu *vcpu,
I think placing this here means we will miss a few translations, namely
when we do a physical access (say, reading PDPTEs or similar).
We need to do this on the level of kvm_read_guest() so we capture
physical accesses:
kvm_read_guest_virt
-> walk_addr
-> kvm_read_guest_tdp
-> kvm_read_guest_virt
-> walk_addr
-> kvm_read_guest_tdp
-> kvm_read_guest
Of course, not all accesses will use kvm_read_guest_tdp; for example
kvmclock accesses should still go untranslated.
--
error compiling committee.c: too many arguments to function
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