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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [V1 PATCH 2/5] PVH xen tools: libxc changes to build a PVH guest.
Signed-off-by: Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>
---
tools/libxc/xc_dom.h | 1 +
tools/libxc/xc_dom_core.c | 8 ++++
tools/libxc/xc_dom_x86.c | 83 ++++++++++++++++++++++++++++-----------------
3 files changed, 61 insertions(+), 31 deletions(-)
diff --git a/tools/libxc/xc_dom.h b/tools/libxc/xc_dom.h
index 86e23ee..5168bcd 100644
--- a/tools/libxc/xc_dom.h
+++ b/tools/libxc/xc_dom.h
@@ -130,6 +130,7 @@ struct xc_dom_image {
domid_t console_domid;
domid_t xenstore_domid;
xen_pfn_t shared_info_mfn;
+ int pvh_enabled;
xc_interface *xch;
domid_t guest_domid;
diff --git a/tools/libxc/xc_dom_core.c b/tools/libxc/xc_dom_core.c
index 0f367f6..6ebe7ec 100644
--- a/tools/libxc/xc_dom_core.c
+++ b/tools/libxc/xc_dom_core.c
@@ -766,6 +766,14 @@ int xc_dom_parse_image(struct xc_dom_image *dom)
goto err;
}
+ if ( dom->pvh_enabled )
+ {
+ char *pvh_features = "writable_descriptor_tables|"
+ "auto_translated_physmap|supervisor_mode_kernel|"
+ "hvm_callback_vector";
+ elf_xen_parse_features(pvh_features, dom->f_requested, NULL);
+ }
+
/* check features */
for ( i = 0; i < XENFEAT_NR_SUBMAPS; i++ )
{
diff --git a/tools/libxc/xc_dom_x86.c b/tools/libxc/xc_dom_x86.c
index 126c0f8..5b2d61d 100644
--- a/tools/libxc/xc_dom_x86.c
+++ b/tools/libxc/xc_dom_x86.c
@@ -415,7 +415,8 @@ static int setup_pgtables_x86_64(struct xc_dom_image *dom)
pgpfn = (addr - dom->parms.virt_base) >> PAGE_SHIFT_X86;
l1tab[l1off] =
pfn_to_paddr(xc_dom_p2m_guest(dom, pgpfn)) | L1_PROT;
- if ( (addr >= dom->pgtables_seg.vstart) &&
+ if ( (!dom->pvh_enabled) &&
+ (addr >= dom->pgtables_seg.vstart) &&
(addr < dom->pgtables_seg.vend) )
l1tab[l1off] &= ~_PAGE_RW; /* page tables are r/o */
if ( l1off == (L1_PAGETABLE_ENTRIES_X86_64 - 1) )
@@ -629,12 +630,6 @@ static int vcpu_x86_64(struct xc_dom_image *dom, void *ptr)
/* clear everything */
memset(ctxt, 0, sizeof(*ctxt));
- ctxt->user_regs.ds = FLAT_KERNEL_DS_X86_64;
- ctxt->user_regs.es = FLAT_KERNEL_DS_X86_64;
- ctxt->user_regs.fs = FLAT_KERNEL_DS_X86_64;
- ctxt->user_regs.gs = FLAT_KERNEL_DS_X86_64;
- ctxt->user_regs.ss = FLAT_KERNEL_SS_X86_64;
- ctxt->user_regs.cs = FLAT_KERNEL_CS_X86_64;
ctxt->user_regs.rip = dom->parms.virt_entry;
ctxt->user_regs.rsp =
dom->parms.virt_base + (dom->bootstack_pfn + 1) * PAGE_SIZE_X86;
@@ -642,15 +637,25 @@ static int vcpu_x86_64(struct xc_dom_image *dom, void
*ptr)
dom->parms.virt_base + (dom->start_info_pfn) * PAGE_SIZE_X86;
ctxt->user_regs.rflags = 1 << 9; /* Interrupt Enable */
- ctxt->kernel_ss = ctxt->user_regs.ss;
- ctxt->kernel_sp = ctxt->user_regs.esp;
-
ctxt->flags = VGCF_in_kernel_X86_64 | VGCF_online_X86_64;
cr3_pfn = xc_dom_p2m_guest(dom, dom->pgtables_seg.pfn);
ctxt->ctrlreg[3] = xen_pfn_to_cr3_x86_64(cr3_pfn);
DOMPRINTF("%s: cr3: pfn 0x%" PRIpfn " mfn 0x%" PRIpfn "",
__FUNCTION__, dom->pgtables_seg.pfn, cr3_pfn);
+ if ( dom->pvh_enabled )
+ return 0;
+
+ ctxt->user_regs.ds = FLAT_KERNEL_DS_X86_64;
+ ctxt->user_regs.es = FLAT_KERNEL_DS_X86_64;
+ ctxt->user_regs.fs = FLAT_KERNEL_DS_X86_64;
+ ctxt->user_regs.gs = FLAT_KERNEL_DS_X86_64;
+ ctxt->user_regs.ss = FLAT_KERNEL_SS_X86_64;
+ ctxt->user_regs.cs = FLAT_KERNEL_CS_X86_64;
+
+ ctxt->kernel_ss = ctxt->user_regs.ss;
+ ctxt->kernel_sp = ctxt->user_regs.esp;
+
return 0;
}
@@ -751,7 +756,7 @@ int arch_setup_meminit(struct xc_dom_image *dom)
rc = x86_compat(dom->xch, dom->guest_domid, dom->guest_type);
if ( rc )
return rc;
- if ( xc_dom_feature_translated(dom) )
+ if ( xc_dom_feature_translated(dom) && !dom->pvh_enabled )
{
dom->shadow_enabled = 1;
rc = x86_shadow(dom->xch, dom->guest_domid);
@@ -827,6 +832,38 @@ int arch_setup_bootearly(struct xc_dom_image *dom)
return 0;
}
+/*
+ * Map grant table frames into guest physmap. PVH manages grant during boot
+ * via HVM mechanisms.
+ */
+static int map_grant_table_frames(struct xc_dom_image *dom)
+{
+ int i, rc;
+
+ if ( dom->pvh_enabled )
+ return 0;
+
+ for ( i = 0; ; i++ )
+ {
+ rc = xc_domain_add_to_physmap(dom->xch, dom->guest_domid,
+ XENMAPSPACE_grant_table,
+ i, dom->total_pages + i);
+ if ( rc != 0 )
+ {
+ if ( (i > 0) && (errno == EINVAL) )
+ {
+ DOMPRINTF("%s: %d grant tables mapped", __FUNCTION__, i);
+ break;
+ }
+ xc_dom_panic(dom->xch, XC_INTERNAL_ERROR,
+ "%s: mapping grant tables failed " "(pfn=0x%" PRIpfn
+ ", rc=%d)", __FUNCTION__, dom->total_pages + i, rc);
+ return rc;
+ }
+ }
+ return 0;
+}
+
int arch_setup_bootlate(struct xc_dom_image *dom)
{
static const struct {
@@ -865,7 +902,6 @@ int arch_setup_bootlate(struct xc_dom_image *dom)
else
{
/* paravirtualized guest with auto-translation */
- int i;
/* Map shared info frame into guest physmap. */
rc = xc_domain_add_to_physmap(dom->xch, dom->guest_domid,
@@ -879,25 +915,10 @@ int arch_setup_bootlate(struct xc_dom_image *dom)
return rc;
}
- /* Map grant table frames into guest physmap. */
- for ( i = 0; ; i++ )
- {
- rc = xc_domain_add_to_physmap(dom->xch, dom->guest_domid,
- XENMAPSPACE_grant_table,
- i, dom->total_pages + i);
- if ( rc != 0 )
- {
- if ( (i > 0) && (errno == EINVAL) )
- {
- DOMPRINTF("%s: %d grant tables mapped", __FUNCTION__, i);
- break;
- }
- xc_dom_panic(dom->xch, XC_INTERNAL_ERROR,
- "%s: mapping grant tables failed " "(pfn=0x%"
- PRIpfn ", rc=%d)", __FUNCTION__, dom->total_pages
+ i, rc);
- return rc;
- }
- }
+ rc = map_grant_table_frames(dom);
+ if ( rc != 0 )
+ return rc;
+
shinfo = dom->shared_info_pfn;
}
--
1.7.2.3
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