nestedhvm: fix nested page fault build error on 32-bit

    cc1: warnings being treated as errors
    hvm.c: In function ‘hvm_hap_nested_page_fault’:
    hvm.c:1282: error: passing argument 2 of ‘nestedhvm_hap_nested_page_fault’ from incompatible pointer type /local/scratch/ianc/devel/xen-unstable.hg/xen/include/asm/hvm/nestedhvm.h:55: note: expected ‘paddr_t *’ but argument is of type ‘long unsigned int *’

hvm_hap_nested_page_fault takes an unsigned long gpa and passes &gpa
to nestedhvm_hap_nested_page_fault which takes a paddr_t *. Since both
of the callers of hvm_hap_nested_page_fault (svm_do_nested_pgfault and
ept_handle_violation) actually have the gpa which they pass to
hvm_hap_nested_page_fault as a paddr_t I think it makes sense to
change the argument to hvm_hap_nested_page_fault.

The other user of gpa in hvm_hap_nested_page_fault is a call to
p2m_mem_access_check, which currently also takes a paddr_t gpa but I
think a paddr_t is appropriate there too.

Jan points out that this is also an issue for >4GB guests on the 32
bit hypervisor.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Tim Deegan <tim@xen.org>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

4 files changed, 5 insertions, 5 deletions

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 87c08a9b5d..7f8a025c8e 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -1242,7 +1242,7 @@ void hvm_inject_page_fault(int errcode, unsigned long cr2)
     hvm_inject_trap(&trap);
 }
 
-int hvm_hap_nested_page_fault(unsigned long gpa,
+int hvm_hap_nested_page_fault(paddr_t gpa,
                               bool_t gla_valid,
                               unsigned long gla,
                               bool_t access_r,
diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c
index 75926558fd..344fb9928d 100644
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -1233,7 +1233,7 @@ void p2m_mem_paging_resume(struct domain *d)
     }
 }
 
-bool_t p2m_mem_access_check(unsigned long gpa, bool_t gla_valid, unsigned long gla, 
+bool_t p2m_mem_access_check(paddr_t gpa, bool_t gla_valid, unsigned long gla, 
                           bool_t access_r, bool_t access_w, bool_t access_x,
                           mem_event_request_t **req_ptr)
 {
diff --git a/xen/include/asm-x86/hvm/hvm.h b/xen/include/asm-x86/hvm/hvm.h
index ee1677be07..7243c4eb25 100644
--- a/xen/include/asm-x86/hvm/hvm.h
+++ b/xen/include/asm-x86/hvm/hvm.h
@@ -433,7 +433,7 @@ static inline void hvm_set_info_guest(struct vcpu *v)
 
 int hvm_debug_op(struct vcpu *v, int32_t op);
 
-int hvm_hap_nested_page_fault(unsigned long gpa,
+int hvm_hap_nested_page_fault(paddr_t gpa,
                               bool_t gla_valid, unsigned long gla,
                               bool_t access_r,
                               bool_t access_w,
diff --git a/xen/include/asm-x86/p2m.h b/xen/include/asm-x86/p2m.h
index 8f01fee37c..fd49b28220 100644
--- a/xen/include/asm-x86/p2m.h
+++ b/xen/include/asm-x86/p2m.h
@@ -589,7 +589,7 @@ static inline void p2m_mem_paging_populate(struct domain *d, unsigned long gfn)
  * been promoted with no underlying vcpu pause. If the req_ptr has been populated, 
  * then the caller must put the event in the ring (once having released get_gfn*
  * locks -- caller must also xfree the request. */
-bool_t p2m_mem_access_check(unsigned long gpa, bool_t gla_valid, unsigned long gla, 
+bool_t p2m_mem_access_check(paddr_t gpa, bool_t gla_valid, unsigned long gla, 
                           bool_t access_r, bool_t access_w, bool_t access_x,
                           mem_event_request_t **req_ptr);
 /* Resumes the running of the VCPU, restarting the last instruction */
@@ -606,7 +606,7 @@ int p2m_get_mem_access(struct domain *d, unsigned long pfn,
                        hvmmem_access_t *access);
 
 #else
-static inline bool_t p2m_mem_access_check(unsigned long gpa, bool_t gla_valid, 
+static inline bool_t p2m_mem_access_check(paddr_t gpa, bool_t gla_valid, 
                                         unsigned long gla, bool_t access_r, 
                                         bool_t access_w, bool_t access_x,
                                         mem_event_request_t **req_ptr)