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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 1/18 V2]: PVH xen: turn gdb_frames/gdt_ents into union
PVH only needs gdtaddr and gdtsz, so a union is created. There is no
functional code change in this patch.
Changes in V2:
- Add __XEN_INTERFACE_VERSION__
Signed-off-by: Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>
---
tools/libxc/xc_domain_restore.c | 8 ++++----
tools/libxc/xc_domain_save.c | 6 +++---
xen/arch/x86/domain.c | 12 ++++++------
xen/arch/x86/domctl.c | 12 ++++++------
xen/include/public/arch-x86/xen.h | 13 +++++++++++++
5 files changed, 32 insertions(+), 19 deletions(-)
diff --git a/tools/libxc/xc_domain_restore.c
b/tools/libxc/xc_domain_restore.c index a15f86a..9a22e2a 100644
--- a/tools/libxc/xc_domain_restore.c
+++ b/tools/libxc/xc_domain_restore.c
@@ -2020,15 +2020,15 @@ int xc_domain_restore(xc_interface *xch, int
io_fd, uint32_t dom, munmap(start_info, PAGE_SIZE);
}
/* Uncanonicalise each GDT frame number. */
- if ( GET_FIELD(ctxt, gdt_ents) > 8192 )
+ if ( GET_FIELD(ctxt, u.pv.gdt_ents) > 8192 )
{
ERROR("GDT entry count out of range");
goto out;
}
- for ( j = 0; (512*j) < GET_FIELD(ctxt, gdt_ents); j++ )
+ for ( j = 0; (512*j) < GET_FIELD(ctxt, u.pv.gdt_ents); j++ )
{
- pfn = GET_FIELD(ctxt, gdt_frames[j]);
+ pfn = GET_FIELD(ctxt, u.pv.gdt_frames[j]);
if ( (pfn >= dinfo->p2m_size) ||
(pfn_type[pfn] != XEN_DOMCTL_PFINFO_NOTAB) )
{
@@ -2036,7 +2036,7 @@ int xc_domain_restore(xc_interface *xch, int
io_fd, uint32_t dom, j, (unsigned long)pfn);
goto out;
}
- SET_FIELD(ctxt, gdt_frames[j], ctx->p2m[pfn]);
+ SET_FIELD(ctxt, u.pv.gdt_frames[j], ctx->p2m[pfn]);
}
/* Uncanonicalise the page table base pointer. */
pfn = UNFOLD_CR3(GET_FIELD(ctxt, ctrlreg[3]));
diff --git a/tools/libxc/xc_domain_save.c b/tools/libxc/xc_domain_save.c
index ff76626..4ec5e7e 100644
--- a/tools/libxc/xc_domain_save.c
+++ b/tools/libxc/xc_domain_save.c
@@ -1900,15 +1900,15 @@ int xc_domain_save(xc_interface *xch, int
io_fd, uint32_t dom, uint32_t max_iter }
/* Canonicalise each GDT frame number. */
- for ( j = 0; (512*j) < GET_FIELD(&ctxt, gdt_ents); j++ )
+ for ( j = 0; (512*j) < GET_FIELD(&ctxt, u.pv.gdt_ents); j++ )
{
- mfn = GET_FIELD(&ctxt, gdt_frames[j]);
+ mfn = GET_FIELD(&ctxt, u.pv.gdt_frames[j]);
if ( !MFN_IS_IN_PSEUDOPHYS_MAP(mfn) )
{
ERROR("GDT frame is not in range of pseudophys map");
goto out;
}
- SET_FIELD(&ctxt, gdt_frames[j], mfn_to_pfn(mfn));
+ SET_FIELD(&ctxt, u.pv.gdt_frames[j], mfn_to_pfn(mfn));
}
/* Canonicalise the page table base pointer. */
diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index 8d30d08..ea1381c 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -780,8 +780,8 @@ int arch_set_info_guest(
}
for ( i = 0; i < ARRAY_SIZE(v->arch.pv_vcpu.gdt_frames); ++i )
- fail |= v->arch.pv_vcpu.gdt_frames[i] != c(gdt_frames[i]);
- fail |= v->arch.pv_vcpu.gdt_ents != c(gdt_ents);
+ fail |= v->arch.pv_vcpu.gdt_frames[i] !=
c(u.pv.gdt_frames[i]);
+ fail |= v->arch.pv_vcpu.gdt_ents != c(u.pv.gdt_ents);
fail |= v->arch.pv_vcpu.ldt_base != c(ldt_base);
fail |= v->arch.pv_vcpu.ldt_ents != c(ldt_ents);
@@ -830,17 +830,17 @@ int arch_set_info_guest(
d->vm_assist = c(vm_assist);
if ( !compat )
- rc = (int)set_gdt(v, c.nat->gdt_frames, c.nat->gdt_ents);
+ rc = (int)set_gdt(v, c.nat->u.pv.gdt_frames,
c.nat->u.pv.gdt_ents); else
{
unsigned long
gdt_frames[ARRAY_SIZE(v->arch.pv_vcpu.gdt_frames)];
- unsigned int n = (c.cmp->gdt_ents + 511) / 512;
+ unsigned int n = (c.cmp->u.pv.gdt_ents + 511) / 512;
if ( n > ARRAY_SIZE(v->arch.pv_vcpu.gdt_frames) )
return -EINVAL;
for ( i = 0; i < n; ++i )
- gdt_frames[i] = c.cmp->gdt_frames[i];
- rc = (int)set_gdt(v, gdt_frames, c.cmp->gdt_ents);
+ gdt_frames[i] = c.cmp->u.pv.gdt_frames[i];
+ rc = (int)set_gdt(v, gdt_frames, c.cmp->u.pv.gdt_ents);
}
if ( rc != 0 )
return rc;
diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c
index a196e2a..31937e0 100644
--- a/xen/arch/x86/domctl.c
+++ b/xen/arch/x86/domctl.c
@@ -1305,12 +1305,12 @@ void arch_get_info_guest(struct vcpu *v,
vcpu_guest_context_u c) c(ldt_base = v->arch.pv_vcpu.ldt_base);
c(ldt_ents = v->arch.pv_vcpu.ldt_ents);
for ( i = 0; i < ARRAY_SIZE(v->arch.pv_vcpu.gdt_frames); ++i )
- c(gdt_frames[i] = v->arch.pv_vcpu.gdt_frames[i]);
- BUILD_BUG_ON(ARRAY_SIZE(c.nat->gdt_frames) !=
- ARRAY_SIZE(c.cmp->gdt_frames));
- for ( ; i < ARRAY_SIZE(c.nat->gdt_frames); ++i )
- c(gdt_frames[i] = 0);
- c(gdt_ents = v->arch.pv_vcpu.gdt_ents);
+ c(u.pv.gdt_frames[i] = v->arch.pv_vcpu.gdt_frames[i]);
+ BUILD_BUG_ON(ARRAY_SIZE(c.nat->u.pv.gdt_frames) !=
+ ARRAY_SIZE(c.cmp->u.pv.gdt_frames));
+ for ( ; i < ARRAY_SIZE(c.nat->u.pv.gdt_frames); ++i )
+ c(u.pv.gdt_frames[i] = 0);
+ c(u.pv.gdt_ents = v->arch.pv_vcpu.gdt_ents);
c(kernel_ss = v->arch.pv_vcpu.kernel_ss);
c(kernel_sp = v->arch.pv_vcpu.kernel_sp);
for ( i = 0; i < ARRAY_SIZE(v->arch.pv_vcpu.ctrlreg); ++i )
diff --git a/xen/include/public/arch-x86/xen.h
b/xen/include/public/arch-x86/xen.h index b7f6a51..ea72532 100644
--- a/xen/include/public/arch-x86/xen.h
+++ b/xen/include/public/arch-x86/xen.h
@@ -170,7 +170,20 @@ struct vcpu_guest_context {
struct cpu_user_regs user_regs; /* User-level CPU
registers */ struct trap_info trap_ctxt[256]; /* Virtual
IDT */ unsigned long ldt_base, ldt_ents; /* LDT
(linear address, # ents) */ +#if __XEN_INTERFACE_VERSION__ < 0x00040300
unsigned long gdt_frames[16], gdt_ents; /* GDT (machine frames, #
ents) */ +#else
+ union {
+ struct {
+ /* GDT (machine frames, # ents) */
+ unsigned long gdt_frames[16], gdt_ents;
+ } pv;
+ struct {
+ /* PVH: GDTR addr and size */
+ unsigned long gdtaddr, gdtsz;
+ } pvh;
+ } u;
+#endif
unsigned long kernel_ss, kernel_sp; /* Virtual TSS (only
SS1/SP1) */ /* NB. User pagetable on x86/64 is placed in ctrlreg[1].
*/ unsigned long ctrlreg[8]; /* CR0-CR7 (control
registers) */
--
1.7.2.3
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