# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1287756891 -3600
# Node ID 60a3dfbe7e59b6af8776f3c75f1997dc1655ecb2
# Parent ca4a781c8ae88c05a86a9c5f1918ed58c789d085
libxc: convert domctl interfaces over to hypercall buffers
(defer save/restore and shadow related interfaces til a later patch)
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Signed-off-by: Ian Jackson <ian.jackson.citrix.com>
---
tools/libxc/xc_dom_boot.c | 26 ++++---
tools/libxc/xc_domain.c | 159 ++++++++++++++++++++++------------------------
tools/libxc/xc_private.c | 36 ++++++----
tools/libxc/xc_private.h | 18 ++---
tools/libxc/xc_resume.c | 7 --
5 files changed, 124 insertions(+), 122 deletions(-)
diff -r ca4a781c8ae8 -r 60a3dfbe7e59 tools/libxc/xc_dom_boot.c
--- a/tools/libxc/xc_dom_boot.c Fri Oct 22 15:14:51 2010 +0100
+++ b/tools/libxc/xc_dom_boot.c Fri Oct 22 15:14:51 2010 +0100
@@ -61,9 +61,10 @@ static int setup_hypercall_page(struct x
return rc;
}
-static int launch_vm(xc_interface *xch, domid_t domid, void *ctxt)
-{
- DECLARE_DOMCTL;
+static int launch_vm(xc_interface *xch, domid_t domid, xc_hypercall_buffer_t
*ctxt)
+{
+ DECLARE_DOMCTL;
+ DECLARE_HYPERCALL_BUFFER_ARGUMENT(ctxt);
int rc;
xc_dom_printf(xch, "%s: called, ctxt=%p", __FUNCTION__, ctxt);
@@ -71,7 +72,7 @@ static int launch_vm(xc_interface *xch,
domctl.cmd = XEN_DOMCTL_setvcpucontext;
domctl.domain = domid;
domctl.u.vcpucontext.vcpu = 0;
- set_xen_guest_handle(domctl.u.vcpucontext.ctxt, ctxt);
+ xc_set_xen_guest_handle(domctl.u.vcpucontext.ctxt, ctxt);
rc = do_domctl(xch, &domctl);
if ( rc != 0 )
xc_dom_panic(xch, XC_INTERNAL_ERROR,
@@ -202,8 +203,12 @@ int xc_dom_boot_image(struct xc_dom_imag
int xc_dom_boot_image(struct xc_dom_image *dom)
{
DECLARE_DOMCTL;
- vcpu_guest_context_any_t ctxt;
- int rc;
+ DECLARE_HYPERCALL_BUFFER(vcpu_guest_context_any_t, ctxt);
+ int rc;
+
+ ctxt = xc_hypercall_buffer_alloc(dom->xch, ctxt, sizeof(*ctxt));
+ if ( ctxt == NULL )
+ return -1;
DOMPRINTF_CALLED(dom->xch);
@@ -260,12 +265,13 @@ int xc_dom_boot_image(struct xc_dom_imag
return rc;
/* let the vm run */
- memset(&ctxt, 0, sizeof(ctxt));
- if ( (rc = dom->arch_hooks->vcpu(dom, &ctxt)) != 0 )
+ memset(ctxt, 0, sizeof(ctxt));
+ if ( (rc = dom->arch_hooks->vcpu(dom, ctxt)) != 0 )
return rc;
xc_dom_unmap_all(dom);
- rc = launch_vm(dom->xch, dom->guest_domid, &ctxt);
-
+ rc = launch_vm(dom->xch, dom->guest_domid, HYPERCALL_BUFFER(ctxt));
+
+ xc_hypercall_buffer_free(dom->xch, ctxt);
return rc;
}
diff -r ca4a781c8ae8 -r 60a3dfbe7e59 tools/libxc/xc_domain.c
--- a/tools/libxc/xc_domain.c Fri Oct 22 15:14:51 2010 +0100
+++ b/tools/libxc/xc_domain.c Fri Oct 22 15:14:51 2010 +0100
@@ -115,36 +115,31 @@ int xc_vcpu_setaffinity(xc_interface *xc
uint64_t *cpumap, int cpusize)
{
DECLARE_DOMCTL;
+ DECLARE_HYPERCALL_BUFFER(uint8_t, local);
int ret = -1;
- uint8_t *local = malloc(cpusize);
-
- if(local == NULL)
- {
- PERROR("Could not alloc memory for Xen hypercall");
+
+ local = xc_hypercall_buffer_alloc(xch, local, cpusize);
+ if ( local == NULL )
+ {
+ PERROR("Could not allocate memory for setvcpuaffinity domctl
hypercall");
goto out;
}
+
domctl.cmd = XEN_DOMCTL_setvcpuaffinity;
domctl.domain = (domid_t)domid;
domctl.u.vcpuaffinity.vcpu = vcpu;
bitmap_64_to_byte(local, cpumap, cpusize * 8);
- set_xen_guest_handle(domctl.u.vcpuaffinity.cpumap.bitmap, local);
+ xc_set_xen_guest_handle(domctl.u.vcpuaffinity.cpumap.bitmap, local);
domctl.u.vcpuaffinity.cpumap.nr_cpus = cpusize * 8;
-
- if ( lock_pages(xch, local, cpusize) != 0 )
- {
- PERROR("Could not lock memory for Xen hypercall");
- goto out;
- }
ret = do_domctl(xch, &domctl);
- unlock_pages(xch, local, cpusize);
+ xc_hypercall_buffer_free(xch, local);
out:
- free(local);
return ret;
}
@@ -155,12 +150,13 @@ int xc_vcpu_getaffinity(xc_interface *xc
uint64_t *cpumap, int cpusize)
{
DECLARE_DOMCTL;
+ DECLARE_HYPERCALL_BUFFER(uint8_t, local);
int ret = -1;
- uint8_t * local = malloc(cpusize);
-
+
+ local = xc_hypercall_buffer_alloc(xch, local, cpusize);
if(local == NULL)
{
- PERROR("Could not alloc memory for Xen hypercall");
+ PERROR("Could not allocate memory for getvcpuaffinity domctl
hypercall");
goto out;
}
@@ -168,22 +164,15 @@ int xc_vcpu_getaffinity(xc_interface *xc
domctl.domain = (domid_t)domid;
domctl.u.vcpuaffinity.vcpu = vcpu;
-
- set_xen_guest_handle(domctl.u.vcpuaffinity.cpumap.bitmap, local);
+ xc_set_xen_guest_handle(domctl.u.vcpuaffinity.cpumap.bitmap, local);
domctl.u.vcpuaffinity.cpumap.nr_cpus = cpusize * 8;
-
- if ( lock_pages(xch, local, sizeof(local)) != 0 )
- {
- PERROR("Could not lock memory for Xen hypercall");
- goto out;
- }
ret = do_domctl(xch, &domctl);
- unlock_pages(xch, local, sizeof (local));
bitmap_byte_to_64(cpumap, local, cpusize * 8);
+
+ xc_hypercall_buffer_free(xch, local);
out:
- free(local);
return ret;
}
@@ -283,20 +272,19 @@ int xc_domain_hvm_getcontext(xc_interfac
{
int ret;
DECLARE_DOMCTL;
+ DECLARE_HYPERCALL_BOUNCE(ctxt_buf, size, XC_HYPERCALL_BUFFER_BOUNCE_OUT);
+
+ if ( xc_hypercall_bounce_pre(xch, ctxt_buf) )
+ return -1;
domctl.cmd = XEN_DOMCTL_gethvmcontext;
domctl.domain = (domid_t)domid;
domctl.u.hvmcontext.size = size;
- set_xen_guest_handle(domctl.u.hvmcontext.buffer, ctxt_buf);
-
- if ( ctxt_buf )
- if ( (ret = lock_pages(xch, ctxt_buf, size)) != 0 )
- return ret;
+ xc_set_xen_guest_handle(domctl.u.hvmcontext.buffer, ctxt_buf);
ret = do_domctl(xch, &domctl);
- if ( ctxt_buf )
- unlock_pages(xch, ctxt_buf, size);
+ xc_hypercall_bounce_post(xch, ctxt_buf);
return (ret < 0 ? -1 : domctl.u.hvmcontext.size);
}
@@ -312,23 +300,21 @@ int xc_domain_hvm_getcontext_partial(xc_
{
int ret;
DECLARE_DOMCTL;
-
- if ( !ctxt_buf )
- return -EINVAL;
+ DECLARE_HYPERCALL_BOUNCE(ctxt_buf, size, XC_HYPERCALL_BUFFER_BOUNCE_OUT);
+
+ if ( !ctxt_buf || xc_hypercall_bounce_pre(xch, ctxt_buf) )
+ return -1;
domctl.cmd = XEN_DOMCTL_gethvmcontext_partial;
domctl.domain = (domid_t) domid;
domctl.u.hvmcontext_partial.type = typecode;
domctl.u.hvmcontext_partial.instance = instance;
- set_xen_guest_handle(domctl.u.hvmcontext_partial.buffer, ctxt_buf);
-
- if ( (ret = lock_pages(xch, ctxt_buf, size)) != 0 )
- return ret;
-
+ xc_set_xen_guest_handle(domctl.u.hvmcontext_partial.buffer, ctxt_buf);
+
ret = do_domctl(xch, &domctl);
- if ( ctxt_buf )
- unlock_pages(xch, ctxt_buf, size);
+ if ( ctxt_buf )
+ xc_hypercall_bounce_post(xch, ctxt_buf);
return ret ? -1 : 0;
}
@@ -341,18 +327,19 @@ int xc_domain_hvm_setcontext(xc_interfac
{
int ret;
DECLARE_DOMCTL;
+ DECLARE_HYPERCALL_BOUNCE(ctxt_buf, size, XC_HYPERCALL_BUFFER_BOUNCE_IN);
+
+ if ( xc_hypercall_bounce_pre(xch, ctxt_buf) )
+ return -1;
domctl.cmd = XEN_DOMCTL_sethvmcontext;
domctl.domain = domid;
domctl.u.hvmcontext.size = size;
- set_xen_guest_handle(domctl.u.hvmcontext.buffer, ctxt_buf);
-
- if ( (ret = lock_pages(xch, ctxt_buf, size)) != 0 )
- return ret;
+ xc_set_xen_guest_handle(domctl.u.hvmcontext.buffer, ctxt_buf);
ret = do_domctl(xch, &domctl);
- unlock_pages(xch, ctxt_buf, size);
+ xc_hypercall_bounce_post(xch, ctxt_buf);
return ret;
}
@@ -364,18 +351,19 @@ int xc_vcpu_getcontext(xc_interface *xch
{
int rc;
DECLARE_DOMCTL;
- size_t sz = sizeof(vcpu_guest_context_any_t);
+ DECLARE_HYPERCALL_BOUNCE(ctxt, sizeof(vcpu_guest_context_any_t),
XC_HYPERCALL_BUFFER_BOUNCE_OUT);
+
+ if ( xc_hypercall_bounce_pre(xch, ctxt) )
+ return -1;
domctl.cmd = XEN_DOMCTL_getvcpucontext;
domctl.domain = (domid_t)domid;
domctl.u.vcpucontext.vcpu = (uint16_t)vcpu;
- set_xen_guest_handle(domctl.u.vcpucontext.ctxt, &ctxt->c);
-
-
- if ( (rc = lock_pages(xch, ctxt, sz)) != 0 )
- return rc;
+ xc_set_xen_guest_handle(domctl.u.vcpucontext.ctxt, ctxt);
+
rc = do_domctl(xch, &domctl);
- unlock_pages(xch, ctxt, sz);
+
+ xc_hypercall_bounce_post(xch, ctxt);
return rc;
}
@@ -558,22 +546,24 @@ int xc_domain_get_tsc_info(xc_interface
{
int rc;
DECLARE_DOMCTL;
- xen_guest_tsc_info_t info = { 0 };
+ DECLARE_HYPERCALL_BUFFER(xen_guest_tsc_info_t, info);
+
+ info = xc_hypercall_buffer_alloc(xch, info, sizeof(*info));
+ if ( info == NULL )
+ return -ENOMEM;
domctl.cmd = XEN_DOMCTL_gettscinfo;
domctl.domain = (domid_t)domid;
- set_xen_guest_handle(domctl.u.tsc_info.out_info, &info);
- if ( (rc = lock_pages(xch, &info, sizeof(info))) != 0 )
- return rc;
+ xc_set_xen_guest_handle(domctl.u.tsc_info.out_info, info);
rc = do_domctl(xch, &domctl);
if ( rc == 0 )
{
- *tsc_mode = info.tsc_mode;
- *elapsed_nsec = info.elapsed_nsec;
- *gtsc_khz = info.gtsc_khz;
- *incarnation = info.incarnation;
- }
- unlock_pages(xch, &info,sizeof(info));
+ *tsc_mode = info->tsc_mode;
+ *elapsed_nsec = info->elapsed_nsec;
+ *gtsc_khz = info->gtsc_khz;
+ *incarnation = info->incarnation;
+ }
+ xc_hypercall_buffer_free(xch, info);
return rc;
}
@@ -957,8 +947,8 @@ int xc_vcpu_setcontext(xc_interface *xch
vcpu_guest_context_any_t *ctxt)
{
DECLARE_DOMCTL;
- int rc;
- size_t sz = sizeof(vcpu_guest_context_any_t);
+ DECLARE_HYPERCALL_BOUNCE(ctxt, sizeof(vcpu_guest_context_any_t),
XC_HYPERCALL_BUFFER_BOUNCE_IN);
+ int rc;
if (ctxt == NULL)
{
@@ -966,16 +956,17 @@ int xc_vcpu_setcontext(xc_interface *xch
return -1;
}
+ if ( xc_hypercall_bounce_pre(xch, ctxt) )
+ return -1;
+
domctl.cmd = XEN_DOMCTL_setvcpucontext;
domctl.domain = domid;
domctl.u.vcpucontext.vcpu = vcpu;
- set_xen_guest_handle(domctl.u.vcpucontext.ctxt, &ctxt->c);
-
- if ( (rc = lock_pages(xch, ctxt, sz)) != 0 )
- return rc;
+ xc_set_xen_guest_handle(domctl.u.vcpucontext.ctxt, ctxt);
+
rc = do_domctl(xch, &domctl);
-
- unlock_pages(xch, ctxt, sz);
+
+ xc_hypercall_bounce_post(xch, ctxt);
return rc;
}
@@ -1101,6 +1092,13 @@ int xc_get_device_group(
{
int rc;
DECLARE_DOMCTL;
+ DECLARE_HYPERCALL_BOUNCE(sdev_array, max_sdevs * sizeof(*sdev_array),
XC_HYPERCALL_BUFFER_BOUNCE_IN);
+
+ if ( xc_hypercall_bounce_pre(xch, sdev_array) )
+ {
+ PERROR("Could not bounce buffer for xc_get_device_group");
+ return -1;
+ }
domctl.cmd = XEN_DOMCTL_get_device_group;
domctl.domain = (domid_t)domid;
@@ -1108,17 +1106,14 @@ int xc_get_device_group(
domctl.u.get_device_group.machine_bdf = machine_bdf;
domctl.u.get_device_group.max_sdevs = max_sdevs;
- set_xen_guest_handle(domctl.u.get_device_group.sdev_array, sdev_array);
-
- if ( lock_pages(xch, sdev_array, max_sdevs * sizeof(*sdev_array)) != 0 )
- {
- PERROR("Could not lock memory for xc_get_device_group");
- return -ENOMEM;
- }
+ xc_set_xen_guest_handle(domctl.u.get_device_group.sdev_array, sdev_array);
+
rc = do_domctl(xch, &domctl);
- unlock_pages(xch, sdev_array, max_sdevs * sizeof(*sdev_array));
*num_sdevs = domctl.u.get_device_group.num_sdevs;
+
+ xc_hypercall_bounce_post(xch, sdev_array);
+
return rc;
}
diff -r ca4a781c8ae8 -r 60a3dfbe7e59 tools/libxc/xc_private.c
--- a/tools/libxc/xc_private.c Fri Oct 22 15:14:51 2010 +0100
+++ b/tools/libxc/xc_private.c Fri Oct 22 15:14:51 2010 +0100
@@ -320,12 +320,18 @@ int xc_get_pfn_type_batch(xc_interface *
int xc_get_pfn_type_batch(xc_interface *xch, uint32_t dom,
unsigned int num, xen_pfn_t *arr)
{
+ int rc;
DECLARE_DOMCTL;
+ DECLARE_HYPERCALL_BOUNCE(arr, sizeof(*arr) * num,
XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
+ if ( xc_hypercall_bounce_pre(xch, arr) )
+ return -1;
domctl.cmd = XEN_DOMCTL_getpageframeinfo3;
domctl.domain = (domid_t)dom;
domctl.u.getpageframeinfo3.num = num;
- set_xen_guest_handle(domctl.u.getpageframeinfo3.array, arr);
- return do_domctl(xch, &domctl);
+ xc_set_xen_guest_handle(domctl.u.getpageframeinfo3.array, arr);
+ rc = do_domctl(xch, &domctl);
+ xc_hypercall_bounce_post(xch, arr);
+ return rc;
}
int xc_mmuext_op(
@@ -496,25 +502,27 @@ int xc_get_pfn_list(xc_interface *xch,
unsigned long max_pfns)
{
DECLARE_DOMCTL;
+ DECLARE_HYPERCALL_BOUNCE(pfn_buf, max_pfns * sizeof(*pfn_buf),
XC_HYPERCALL_BUFFER_BOUNCE_OUT);
int ret;
+
+#ifdef VALGRIND
+ memset(pfn_buf, 0, max_pfns * sizeof(*pfn_buf));
+#endif
+
+ if ( xc_hypercall_bounce_pre(xch, pfn_buf) )
+ {
+ PERROR("xc_get_pfn_list: pfn_buf bounce failed");
+ return -1;
+ }
+
domctl.cmd = XEN_DOMCTL_getmemlist;
domctl.domain = (domid_t)domid;
domctl.u.getmemlist.max_pfns = max_pfns;
- set_xen_guest_handle(domctl.u.getmemlist.buffer, pfn_buf);
-
-#ifdef VALGRIND
- memset(pfn_buf, 0, max_pfns * sizeof(*pfn_buf));
-#endif
-
- if ( lock_pages(xch, pfn_buf, max_pfns * sizeof(*pfn_buf)) != 0 )
- {
- PERROR("xc_get_pfn_list: pfn_buf lock failed");
- return -1;
- }
+ xc_set_xen_guest_handle(domctl.u.getmemlist.buffer, pfn_buf);
ret = do_domctl(xch, &domctl);
- unlock_pages(xch, pfn_buf, max_pfns * sizeof(*pfn_buf));
+ xc_hypercall_bounce_post(xch, pfn_buf);
return (ret < 0) ? -1 : domctl.u.getmemlist.num_pfns;
}
diff -r ca4a781c8ae8 -r 60a3dfbe7e59 tools/libxc/xc_private.h
--- a/tools/libxc/xc_private.h Fri Oct 22 15:14:51 2010 +0100
+++ b/tools/libxc/xc_private.h Fri Oct 22 15:14:51 2010 +0100
@@ -211,17 +211,18 @@ static inline int do_domctl(xc_interface
{
int ret = -1;
DECLARE_HYPERCALL;
-
- if ( hcall_buf_prep(xch, (void **)&domctl, sizeof(*domctl)) != 0 )
- {
- PERROR("Could not lock memory for Xen hypercall");
+ DECLARE_HYPERCALL_BOUNCE(domctl, sizeof(*domctl),
XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
+
+ domctl->interface_version = XEN_DOMCTL_INTERFACE_VERSION;
+
+ if ( xc_hypercall_bounce_pre(xch, domctl) )
+ {
+ PERROR("Could not bounce buffer for domctl hypercall");
goto out1;
}
- domctl->interface_version = XEN_DOMCTL_INTERFACE_VERSION;
-
hypercall.op = __HYPERVISOR_domctl;
- hypercall.arg[0] = (unsigned long)domctl;
+ hypercall.arg[0] = HYPERCALL_BUFFER_AS_ARG(domctl);
if ( (ret = do_xen_hypercall(xch, &hypercall)) < 0 )
{
@@ -230,8 +231,7 @@ static inline int do_domctl(xc_interface
" rebuild the user-space tool set?\n");
}
- hcall_buf_release(xch, (void **)&domctl, sizeof(*domctl));
-
+ xc_hypercall_bounce_post(xch, domctl);
out1:
return ret;
}
diff -r ca4a781c8ae8 -r 60a3dfbe7e59 tools/libxc/xc_resume.c
--- a/tools/libxc/xc_resume.c Fri Oct 22 15:14:51 2010 +0100
+++ b/tools/libxc/xc_resume.c Fri Oct 22 15:14:51 2010 +0100
@@ -196,12 +196,6 @@ static int xc_domain_resume_any(xc_inter
goto out;
}
- if ( lock_pages(xch, &ctxt, sizeof(ctxt)) )
- {
- ERROR("Unable to lock ctxt");
- goto out;
- }
-
if ( xc_vcpu_getcontext(xch, domid, 0, &ctxt) )
{
ERROR("Could not get vcpu context");
@@ -235,7 +229,6 @@ static int xc_domain_resume_any(xc_inter
#if defined(__i386__) || defined(__x86_64__)
out:
- unlock_pages(xch, (void *)&ctxt, sizeof ctxt);
if (p2m)
munmap(p2m, P2M_FL_ENTRIES*PAGE_SIZE);
if (p2m_frame_list)
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