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Re: [Xen-devel] [PATCH v6 04/14] xen: Use a typesafe to define INVALID_GFN
- To: xen-devel@xxxxxxxxxxxxx
- From: Julien Grall <julien.grall@xxxxxxx>
- Date: Wed, 6 Jul 2016 14:05:24 +0100
- Cc: elena.ufimtseva@xxxxxxxxxx, Kevin Tian <kevin.tian@xxxxxxxxx>, sstabellini@xxxxxxxxxx, Feng Wu <feng.wu@xxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Jun Nakajima <jun.nakajima@xxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxxxxx>, Paul Durrant <paul.durrant@xxxxxxxxxx>, Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
- Delivery-date: Wed, 06 Jul 2016 13:05:35 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
(CC Elena)
On 06/07/16 14:01, Julien Grall wrote:
Also take the opportunity to convert arch/x86/debug.c to the typesafe gfn.
Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
Cc: Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>
I forgot to update the CC list since GDSX maintainership was taken over
by Elena. Sorry for that.
Regards,
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Paul Durrant <paul.durrant@xxxxxxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
Cc: Jun Nakajima <jun.nakajima@xxxxxxxxx>
Cc: Kevin Tian <kevin.tian@xxxxxxxxx>
Cc: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
Cc: Tim Deegan <tim@xxxxxxx>
Cc: Feng Wu <feng.wu@xxxxxxxxx>
Changes in v6:
- Add Stefano's acked-by for ARM bits
- Remove set of brackets when it is not necessary
- Add Andrew's reviewed-by
Changes in v5:
- Patch added
---
xen/arch/arm/p2m.c | 4 ++--
xen/arch/x86/debug.c | 18 +++++++++---------
xen/arch/x86/domain.c | 2 +-
xen/arch/x86/hvm/emulate.c | 7 ++++---
xen/arch/x86/hvm/hvm.c | 6 +++---
xen/arch/x86/hvm/ioreq.c | 8 ++++----
xen/arch/x86/hvm/svm/nestedsvm.c | 2 +-
xen/arch/x86/hvm/vmx/vmx.c | 6 +++---
xen/arch/x86/mm/altp2m.c | 2 +-
xen/arch/x86/mm/hap/guest_walk.c | 10 +++++-----
xen/arch/x86/mm/hap/nested_ept.c | 2 +-
xen/arch/x86/mm/p2m-pod.c | 6 +++---
xen/arch/x86/mm/p2m.c | 18 +++++++++---------
xen/arch/x86/mm/shadow/common.c | 2 +-
xen/arch/x86/mm/shadow/multi.c | 2 +-
xen/arch/x86/mm/shadow/private.h | 2 +-
xen/drivers/passthrough/amd/iommu_map.c | 2 +-
xen/drivers/passthrough/vtd/iommu.c | 4 ++--
xen/drivers/passthrough/x86/iommu.c | 2 +-
xen/include/asm-x86/guest_pt.h | 4 ++--
xen/include/asm-x86/p2m.h | 2 +-
xen/include/xen/mm.h | 2 +-
22 files changed, 57 insertions(+), 56 deletions(-)
diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index d690602..c938dde 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -479,7 +479,7 @@ static int __p2m_get_mem_access(struct domain *d, gfn_t gfn,
}
/* If request to get default access. */
- if ( gfn_x(gfn) == INVALID_GFN )
+ if ( gfn_eq(gfn, INVALID_GFN) )
{
*access = memaccess[p2m->default_access];
return 0;
@@ -1879,7 +1879,7 @@ long p2m_set_mem_access(struct domain *d, gfn_t gfn,
uint32_t nr,
p2m->mem_access_enabled = true;
/* If request to set default access. */
- if ( gfn_x(gfn) == INVALID_GFN )
+ if ( gfn_eq(gfn, INVALID_GFN) )
{
p2m->default_access = a;
return 0;
diff --git a/xen/arch/x86/debug.c b/xen/arch/x86/debug.c
index 9213ea7..3030022 100644
--- a/xen/arch/x86/debug.c
+++ b/xen/arch/x86/debug.c
@@ -44,8 +44,7 @@ typedef unsigned char dbgbyte_t;
/* Returns: mfn for the given (hvm guest) vaddr */
static mfn_t
-dbg_hvm_va2mfn(dbgva_t vaddr, struct domain *dp, int toaddr,
- unsigned long *gfn)
+dbg_hvm_va2mfn(dbgva_t vaddr, struct domain *dp, int toaddr, gfn_t *gfn)
{
mfn_t mfn;
uint32_t pfec = PFEC_page_present;
@@ -53,14 +52,14 @@ dbg_hvm_va2mfn(dbgva_t vaddr, struct domain *dp, int toaddr,
DBGP2("vaddr:%lx domid:%d\n", vaddr, dp->domain_id);
- *gfn = paging_gva_to_gfn(dp->vcpu[0], vaddr, &pfec);
- if ( *gfn == INVALID_GFN )
+ *gfn = _gfn(paging_gva_to_gfn(dp->vcpu[0], vaddr, &pfec));
+ if ( gfn_eq(*gfn, INVALID_GFN) )
{
DBGP2("kdb:bad gfn from gva_to_gfn\n");
return INVALID_MFN;
}
- mfn = get_gfn(dp, *gfn, &gfntype);
+ mfn = get_gfn(dp, gfn_x(*gfn), &gfntype);
if ( p2m_is_readonly(gfntype) && toaddr )
{
DBGP2("kdb:p2m_is_readonly: gfntype:%x\n", gfntype);
@@ -72,7 +71,7 @@ dbg_hvm_va2mfn(dbgva_t vaddr, struct domain *dp, int toaddr,
if ( mfn_eq(mfn, INVALID_MFN) )
{
- put_gfn(dp, *gfn);
+ put_gfn(dp, gfn_x(*gfn));
*gfn = INVALID_GFN;
}
@@ -165,7 +164,8 @@ unsigned int dbg_rw_guest_mem(struct domain *dp, void *
__user gaddr,
char *va;
unsigned long addr = (unsigned long)gaddr;
mfn_t mfn;
- unsigned long gfn = INVALID_GFN, pagecnt;
+ gfn_t gfn = INVALID_GFN;
+ unsigned long pagecnt;
pagecnt = min_t(long, PAGE_SIZE - (addr & ~PAGE_MASK), len);
@@ -189,8 +189,8 @@ unsigned int dbg_rw_guest_mem(struct domain *dp, void *
__user gaddr,
}
unmap_domain_page(va);
- if ( gfn != INVALID_GFN )
- put_gfn(dp, gfn);
+ if ( !gfn_eq(gfn, INVALID_GFN) )
+ put_gfn(dp, gfn_x(gfn));
addr += pagecnt;
buf += pagecnt;
diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index bb59247..c8c7e2d 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -783,7 +783,7 @@ int arch_domain_soft_reset(struct domain *d)
* gfn == INVALID_GFN indicates that the shared_info page was never mapped
* to the domain's address space and there is nothing to replace.
*/
- if ( gfn == INVALID_GFN )
+ if ( gfn == gfn_x(INVALID_GFN) )
goto exit_put_page;
if ( mfn_x(get_gfn_query(d, gfn, &p2mt)) != mfn )
diff --git a/xen/arch/x86/hvm/emulate.c b/xen/arch/x86/hvm/emulate.c
index 855af4d..c55ad7b 100644
--- a/xen/arch/x86/hvm/emulate.c
+++ b/xen/arch/x86/hvm/emulate.c
@@ -455,7 +455,7 @@ static int hvmemul_linear_to_phys(
return rc;
pfn = _paddr >> PAGE_SHIFT;
}
- else if ( (pfn = paging_gva_to_gfn(curr, addr, &pfec)) == INVALID_GFN )
+ else if ( (pfn = paging_gva_to_gfn(curr, addr, &pfec)) ==
gfn_x(INVALID_GFN) )
{
if ( pfec & (PFEC_page_paged | PFEC_page_shared) )
return X86EMUL_RETRY;
@@ -472,7 +472,8 @@ static int hvmemul_linear_to_phys(
npfn = paging_gva_to_gfn(curr, addr, &pfec);
/* Is it contiguous with the preceding PFNs? If not then we're done.
*/
- if ( (npfn == INVALID_GFN) || (npfn != (pfn + (reverse ? -i : i))) )
+ if ( (npfn == gfn_x(INVALID_GFN)) ||
+ (npfn != (pfn + (reverse ? -i : i))) )
{
if ( pfec & (PFEC_page_paged | PFEC_page_shared) )
return X86EMUL_RETRY;
@@ -480,7 +481,7 @@ static int hvmemul_linear_to_phys(
if ( done == 0 )
{
ASSERT(!reverse);
- if ( npfn != INVALID_GFN )
+ if ( npfn != gfn_x(INVALID_GFN) )
return X86EMUL_UNHANDLEABLE;
hvm_inject_page_fault(pfec, addr & PAGE_MASK);
return X86EMUL_EXCEPTION;
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index f3faf2e..bb39d5f 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -3039,7 +3039,7 @@ static enum hvm_copy_result __hvm_copy(
if ( flags & HVMCOPY_virt )
{
gfn = paging_gva_to_gfn(curr, addr, &pfec);
- if ( gfn == INVALID_GFN )
+ if ( gfn == gfn_x(INVALID_GFN) )
{
if ( pfec & PFEC_page_paged )
return HVMCOPY_gfn_paged_out;
@@ -3154,7 +3154,7 @@ static enum hvm_copy_result __hvm_clear(paddr_t addr, int
size)
count = min_t(int, PAGE_SIZE - (addr & ~PAGE_MASK), todo);
gfn = paging_gva_to_gfn(curr, addr, &pfec);
- if ( gfn == INVALID_GFN )
+ if ( gfn == gfn_x(INVALID_GFN) )
{
if ( pfec & PFEC_page_paged )
return HVMCOPY_gfn_paged_out;
@@ -5298,7 +5298,7 @@ static int do_altp2m_op(
a.u.enable_notify.vcpu_id != curr->vcpu_id )
rc = -EINVAL;
- if ( (gfn_x(vcpu_altp2m(curr).veinfo_gfn) != INVALID_GFN) ||
+ if ( !gfn_eq(vcpu_altp2m(curr).veinfo_gfn, INVALID_GFN) ||
mfn_eq(get_gfn_query_unlocked(curr->domain,
a.u.enable_notify.gfn, &p2mt), INVALID_MFN) )
return -EINVAL;
diff --git a/xen/arch/x86/hvm/ioreq.c b/xen/arch/x86/hvm/ioreq.c
index 7148ac4..d2245e2 100644
--- a/xen/arch/x86/hvm/ioreq.c
+++ b/xen/arch/x86/hvm/ioreq.c
@@ -204,7 +204,7 @@ static void hvm_free_ioreq_gmfn(struct domain *d, unsigned
long gmfn)
{
unsigned int i = gmfn - d->arch.hvm_domain.ioreq_gmfn.base;
- if ( gmfn != INVALID_GFN )
+ if ( gmfn != gfn_x(INVALID_GFN) )
set_bit(i, &d->arch.hvm_domain.ioreq_gmfn.mask);
}
@@ -420,7 +420,7 @@ static int hvm_ioreq_server_map_pages(struct
hvm_ioreq_server *s,
if ( rc )
return rc;
- if ( bufioreq_pfn != INVALID_GFN )
+ if ( bufioreq_pfn != gfn_x(INVALID_GFN) )
rc = hvm_map_ioreq_page(s, 1, bufioreq_pfn);
if ( rc )
@@ -434,8 +434,8 @@ static int hvm_ioreq_server_setup_pages(struct
hvm_ioreq_server *s,
bool_t handle_bufioreq)
{
struct domain *d = s->domain;
- unsigned long ioreq_pfn = INVALID_GFN;
- unsigned long bufioreq_pfn = INVALID_GFN;
+ unsigned long ioreq_pfn = gfn_x(INVALID_GFN);
+ unsigned long bufioreq_pfn = gfn_x(INVALID_GFN);
int rc;
if ( is_default )
diff --git a/xen/arch/x86/hvm/svm/nestedsvm.c b/xen/arch/x86/hvm/svm/nestedsvm.c
index 9d2ac09..f9b38ab 100644
--- a/xen/arch/x86/hvm/svm/nestedsvm.c
+++ b/xen/arch/x86/hvm/svm/nestedsvm.c
@@ -1200,7 +1200,7 @@ nsvm_hap_walk_L1_p2m(struct vcpu *v, paddr_t L2_gpa,
paddr_t *L1_gpa,
/* Walk the guest-supplied NPT table, just as if it were a pagetable */
gfn = paging_ga_to_gfn_cr3(v, nested_cr3, L2_gpa, &pfec, page_order);
- if ( gfn == INVALID_GFN )
+ if ( gfn == gfn_x(INVALID_GFN) )
return NESTEDHVM_PAGEFAULT_INJECT;
*L1_gpa = (gfn << PAGE_SHIFT) + (L2_gpa & ~PAGE_MASK);
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index a061420..088f454 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2057,13 +2057,13 @@ static int vmx_vcpu_emulate_vmfunc(struct cpu_user_regs
*regs)
static bool_t vmx_vcpu_emulate_ve(struct vcpu *v)
{
bool_t rc = 0, writable;
- unsigned long gfn = gfn_x(vcpu_altp2m(v).veinfo_gfn);
+ gfn_t gfn = vcpu_altp2m(v).veinfo_gfn;
ve_info_t *veinfo;
- if ( gfn == INVALID_GFN )
+ if ( gfn_eq(gfn, INVALID_GFN) )
return 0;
- veinfo = hvm_map_guest_frame_rw(gfn, 0, &writable);
+ veinfo = hvm_map_guest_frame_rw(gfn_x(gfn), 0, &writable);
if ( !veinfo )
return 0;
if ( !writable || veinfo->semaphore != 0 )
diff --git a/xen/arch/x86/mm/altp2m.c b/xen/arch/x86/mm/altp2m.c
index 10605c8..930bdc2 100644
--- a/xen/arch/x86/mm/altp2m.c
+++ b/xen/arch/x86/mm/altp2m.c
@@ -26,7 +26,7 @@ altp2m_vcpu_reset(struct vcpu *v)
struct altp2mvcpu *av = &vcpu_altp2m(v);
av->p2midx = INVALID_ALTP2M;
- av->veinfo_gfn = _gfn(INVALID_GFN);
+ av->veinfo_gfn = INVALID_GFN;
}
void
diff --git a/xen/arch/x86/mm/hap/guest_walk.c b/xen/arch/x86/mm/hap/guest_walk.c
index d2716f9..1b1a15d 100644
--- a/xen/arch/x86/mm/hap/guest_walk.c
+++ b/xen/arch/x86/mm/hap/guest_walk.c
@@ -70,14 +70,14 @@ unsigned long hap_p2m_ga_to_gfn(GUEST_PAGING_LEVELS)(
if ( top_page )
put_page(top_page);
p2m_mem_paging_populate(p2m->domain, cr3 >> PAGE_SHIFT);
- return INVALID_GFN;
+ return gfn_x(INVALID_GFN);
}
if ( p2m_is_shared(p2mt) )
{
pfec[0] = PFEC_page_shared;
if ( top_page )
put_page(top_page);
- return INVALID_GFN;
+ return gfn_x(INVALID_GFN);
}
if ( !top_page )
{
@@ -110,12 +110,12 @@ unsigned long hap_p2m_ga_to_gfn(GUEST_PAGING_LEVELS)(
ASSERT(p2m_is_hostp2m(p2m));
pfec[0] = PFEC_page_paged;
p2m_mem_paging_populate(p2m->domain, gfn_x(gfn));
- return INVALID_GFN;
+ return gfn_x(INVALID_GFN);
}
if ( p2m_is_shared(p2mt) )
{
pfec[0] = PFEC_page_shared;
- return INVALID_GFN;
+ return gfn_x(INVALID_GFN);
}
if ( page_order )
@@ -147,7 +147,7 @@ unsigned long hap_p2m_ga_to_gfn(GUEST_PAGING_LEVELS)(
if ( !hvm_nx_enabled(v) && !hvm_smep_enabled(v) )
pfec[0] &= ~PFEC_insn_fetch;
- return INVALID_GFN;
+ return gfn_x(INVALID_GFN);
}
diff --git a/xen/arch/x86/mm/hap/nested_ept.c b/xen/arch/x86/mm/hap/nested_ept.c
index 94cf832..02b27b1 100644
--- a/xen/arch/x86/mm/hap/nested_ept.c
+++ b/xen/arch/x86/mm/hap/nested_ept.c
@@ -236,7 +236,7 @@ int nept_translate_l2ga(struct vcpu *v, paddr_t l2ga,
ept_walk_t gw;
rwx_acc &= EPTE_RWX_MASK;
- *l1gfn = INVALID_GFN;
+ *l1gfn = gfn_x(INVALID_GFN);
rc = nept_walk_tables(v, l2ga, &gw);
switch ( rc )
diff --git a/xen/arch/x86/mm/p2m-pod.c b/xen/arch/x86/mm/p2m-pod.c
index f384589..149f529 100644
--- a/xen/arch/x86/mm/p2m-pod.c
+++ b/xen/arch/x86/mm/p2m-pod.c
@@ -1003,7 +1003,7 @@ static void pod_eager_reclaim(struct p2m_domain *p2m)
unsigned int idx = (mrp->idx + i++) % ARRAY_SIZE(mrp->list);
unsigned long gfn = mrp->list[idx];
- if ( gfn != INVALID_GFN )
+ if ( gfn != gfn_x(INVALID_GFN) )
{
if ( gfn & POD_LAST_SUPERPAGE )
{
@@ -1020,7 +1020,7 @@ static void pod_eager_reclaim(struct p2m_domain *p2m)
else
p2m_pod_zero_check(p2m, &gfn, 1);
- mrp->list[idx] = INVALID_GFN;
+ mrp->list[idx] = gfn_x(INVALID_GFN);
}
} while ( (p2m->pod.count == 0) && (i < ARRAY_SIZE(mrp->list)) );
@@ -1031,7 +1031,7 @@ static void pod_eager_record(struct p2m_domain *p2m,
{
struct pod_mrp_list *mrp = &p2m->pod.mrp;
- ASSERT(gfn != INVALID_GFN);
+ ASSERT(gfn != gfn_x(INVALID_GFN));
mrp->list[mrp->idx++] =
gfn | (order == PAGE_ORDER_2M ? POD_LAST_SUPERPAGE : 0);
diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c
index b93c8a2..ff0cce8 100644
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -76,7 +76,7 @@ static int p2m_initialise(struct domain *d, struct p2m_domain
*p2m)
p2m->np2m_base = P2M_BASE_EADDR;
for ( i = 0; i < ARRAY_SIZE(p2m->pod.mrp.list); ++i )
- p2m->pod.mrp.list[i] = INVALID_GFN;
+ p2m->pod.mrp.list[i] = gfn_x(INVALID_GFN);
if ( hap_enabled(d) && cpu_has_vmx )
ret = ept_p2m_init(p2m);
@@ -1863,7 +1863,7 @@ long p2m_set_mem_access(struct domain *d, gfn_t gfn,
uint32_t nr,
}
/* If request to set default access. */
- if ( gfn_x(gfn) == INVALID_GFN )
+ if ( gfn_eq(gfn, INVALID_GFN) )
{
p2m->default_access = a;
return 0;
@@ -1932,7 +1932,7 @@ int p2m_get_mem_access(struct domain *d, gfn_t gfn,
xenmem_access_t *access)
};
/* If request to get default access. */
- if ( gfn_x(gfn) == INVALID_GFN )
+ if ( gfn_eq(gfn, INVALID_GFN) )
{
*access = memaccess[p2m->default_access];
return 0;
@@ -2113,8 +2113,8 @@ unsigned long paging_gva_to_gfn(struct vcpu *v,
mode = paging_get_nestedmode(v);
l2_gfn = mode->gva_to_gfn(v, p2m, va, pfec);
- if ( l2_gfn == INVALID_GFN )
- return INVALID_GFN;
+ if ( l2_gfn == gfn_x(INVALID_GFN) )
+ return gfn_x(INVALID_GFN);
/* translate l2 guest gfn into l1 guest gfn */
rv = nestedhap_walk_L1_p2m(v, l2_gfn, &l1_gfn, &l1_page_order,
&l1_p2ma,
@@ -2123,7 +2123,7 @@ unsigned long paging_gva_to_gfn(struct vcpu *v,
!!(*pfec & PFEC_insn_fetch));
if ( rv != NESTEDHVM_PAGEFAULT_DONE )
- return INVALID_GFN;
+ return gfn_x(INVALID_GFN);
/*
* Sanity check that l1_gfn can be used properly as a 4K mapping, even
@@ -2415,7 +2415,7 @@ static void p2m_init_altp2m_helper(struct domain *d,
unsigned int i)
struct p2m_domain *p2m = d->arch.altp2m_p2m[i];
struct ept_data *ept;
- p2m->min_remapped_gfn = INVALID_GFN;
+ p2m->min_remapped_gfn = gfn_x(INVALID_GFN);
p2m->max_remapped_gfn = 0;
ept = &p2m->ept;
ept->asr = pagetable_get_pfn(p2m_get_pagetable(p2m));
@@ -2551,7 +2551,7 @@ int p2m_change_altp2m_gfn(struct domain *d, unsigned int
idx,
mfn = ap2m->get_entry(ap2m, gfn_x(old_gfn), &t, &a, 0, NULL, NULL);
- if ( gfn_x(new_gfn) == INVALID_GFN )
+ if ( gfn_eq(new_gfn, INVALID_GFN) )
{
if ( mfn_valid(mfn) )
p2m_remove_page(ap2m, gfn_x(old_gfn), mfn_x(mfn), PAGE_ORDER_4K);
@@ -2613,7 +2613,7 @@ static void p2m_reset_altp2m(struct p2m_domain *p2m)
/* Uninit and reinit ept to force TLB shootdown */
ept_p2m_uninit(p2m);
ept_p2m_init(p2m);
- p2m->min_remapped_gfn = INVALID_GFN;
+ p2m->min_remapped_gfn = gfn_x(INVALID_GFN);
p2m->max_remapped_gfn = 0;
}
diff --git a/xen/arch/x86/mm/shadow/common.c b/xen/arch/x86/mm/shadow/common.c
index 1c0b6cd..61ccddf 100644
--- a/xen/arch/x86/mm/shadow/common.c
+++ b/xen/arch/x86/mm/shadow/common.c
@@ -1707,7 +1707,7 @@ static mfn_t emulate_gva_to_mfn(struct vcpu *v, unsigned
long vaddr,
/* Translate the VA to a GFN. */
gfn = paging_get_hostmode(v)->gva_to_gfn(v, NULL, vaddr, &pfec);
- if ( gfn == INVALID_GFN )
+ if ( gfn == gfn_x(INVALID_GFN) )
{
if ( is_hvm_vcpu(v) )
hvm_inject_page_fault(pfec, vaddr);
diff --git a/xen/arch/x86/mm/shadow/multi.c b/xen/arch/x86/mm/shadow/multi.c
index f892e2f..e54c8b7 100644
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -3660,7 +3660,7 @@ sh_gva_to_gfn(struct vcpu *v, struct p2m_domain *p2m,
*/
if ( is_hvm_vcpu(v) && !hvm_nx_enabled(v) && !hvm_smep_enabled(v) )
pfec[0] &= ~PFEC_insn_fetch;
- return INVALID_GFN;
+ return gfn_x(INVALID_GFN);
}
gfn = guest_walk_to_gfn(&gw);
diff --git a/xen/arch/x86/mm/shadow/private.h b/xen/arch/x86/mm/shadow/private.h
index c424ad6..824796f 100644
--- a/xen/arch/x86/mm/shadow/private.h
+++ b/xen/arch/x86/mm/shadow/private.h
@@ -796,7 +796,7 @@ static inline unsigned long vtlb_lookup(struct vcpu *v,
unsigned long va, uint32_t pfec)
{
unsigned long page_number = va >> PAGE_SHIFT;
- unsigned long frame_number = INVALID_GFN;
+ unsigned long frame_number = gfn_x(INVALID_GFN);
int i = vtlb_hash(page_number);
spin_lock(&v->arch.paging.vtlb_lock);
diff --git a/xen/drivers/passthrough/amd/iommu_map.c
b/xen/drivers/passthrough/amd/iommu_map.c
index c758459..b8c0a48 100644
--- a/xen/drivers/passthrough/amd/iommu_map.c
+++ b/xen/drivers/passthrough/amd/iommu_map.c
@@ -555,7 +555,7 @@ static int update_paging_mode(struct domain *d, unsigned
long gfn)
unsigned long old_root_mfn;
struct domain_iommu *hd = dom_iommu(d);
- if ( gfn == INVALID_GFN )
+ if ( gfn == gfn_x(INVALID_GFN) )
return -EADDRNOTAVAIL;
ASSERT(!(gfn >> DEFAULT_DOMAIN_ADDRESS_WIDTH));
diff --git a/xen/drivers/passthrough/vtd/iommu.c
b/xen/drivers/passthrough/vtd/iommu.c
index f010612..c322b9f 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -611,7 +611,7 @@ static int __must_check iommu_flush_iotlb(struct domain *d,
if ( iommu_domid == -1 )
continue;
- if ( page_count != 1 || gfn == INVALID_GFN )
+ if ( page_count != 1 || gfn == gfn_x(INVALID_GFN) )
rc = iommu_flush_iotlb_dsi(iommu, iommu_domid,
0, flush_dev_iotlb);
else
@@ -640,7 +640,7 @@ static int __must_check iommu_flush_iotlb_pages(struct
domain *d,
static int __must_check iommu_flush_iotlb_all(struct domain *d)
{
- return iommu_flush_iotlb(d, INVALID_GFN, 0, 0);
+ return iommu_flush_iotlb(d, gfn_x(INVALID_GFN), 0, 0);
}
/* clear one page's page table */
diff --git a/xen/drivers/passthrough/x86/iommu.c
b/xen/drivers/passthrough/x86/iommu.c
index cd435d7..69cd6c5 100644
--- a/xen/drivers/passthrough/x86/iommu.c
+++ b/xen/drivers/passthrough/x86/iommu.c
@@ -61,7 +61,7 @@ int arch_iommu_populate_page_table(struct domain *d)
unsigned long mfn = page_to_mfn(page);
unsigned long gfn = mfn_to_gmfn(d, mfn);
- if ( gfn != INVALID_GFN )
+ if ( gfn != gfn_x(INVALID_GFN) )
{
ASSERT(!(gfn >> DEFAULT_DOMAIN_ADDRESS_WIDTH));
BUG_ON(SHARED_M2P(gfn));
diff --git a/xen/include/asm-x86/guest_pt.h b/xen/include/asm-x86/guest_pt.h
index a8d980c..79ed4ff 100644
--- a/xen/include/asm-x86/guest_pt.h
+++ b/xen/include/asm-x86/guest_pt.h
@@ -32,7 +32,7 @@
#error GUEST_PAGING_LEVELS not defined
#endif
-#define VALID_GFN(m) (m != INVALID_GFN)
+#define VALID_GFN(m) (m != gfn_x(INVALID_GFN))
static inline int
valid_gfn(gfn_t m)
@@ -251,7 +251,7 @@ static inline gfn_t
guest_walk_to_gfn(walk_t *gw)
{
if ( !(guest_l1e_get_flags(gw->l1e) & _PAGE_PRESENT) )
- return _gfn(INVALID_GFN);
+ return INVALID_GFN;
return guest_l1e_get_gfn(gw->l1e);
}
diff --git a/xen/include/asm-x86/p2m.h b/xen/include/asm-x86/p2m.h
index 4ab3574..194020e 100644
--- a/xen/include/asm-x86/p2m.h
+++ b/xen/include/asm-x86/p2m.h
@@ -324,7 +324,7 @@ struct p2m_domain {
#define NR_POD_MRP_ENTRIES 32
/* Encode ORDER_2M superpage in top bit of GFN */
-#define POD_LAST_SUPERPAGE (INVALID_GFN & ~(INVALID_GFN >> 1))
+#define POD_LAST_SUPERPAGE (gfn_x(INVALID_GFN) & ~(gfn_x(INVALID_GFN) >> 1))
unsigned long list[NR_POD_MRP_ENTRIES];
unsigned int idx;
diff --git a/xen/include/xen/mm.h b/xen/include/xen/mm.h
index 7f207ec..58bc0b8 100644
--- a/xen/include/xen/mm.h
+++ b/xen/include/xen/mm.h
@@ -84,7 +84,7 @@ static inline bool_t mfn_eq(mfn_t x, mfn_t y)
TYPE_SAFE(unsigned long, gfn);
#define PRI_gfn "05lx"
-#define INVALID_GFN (~0UL)
+#define INVALID_GFN _gfn(~0UL)
#ifndef gfn_t
#define gfn_t /* Grep fodder: gfn_t, _gfn() and gfn_x() are defined above */
--
Julien Grall
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