int xc_get_cpu_featureset(xc_interface *xch, uint32_t index,
uint32_t *nr_features, uint32_t *featureset);
+int xc_get_cpu_policy_size(xc_interface *xch, uint32_t *nr_leaves,
+ uint32_t *nr_msrs);
+int xc_get_system_cpu_policy(xc_interface *xch, uint32_t index,
+ uint32_t *nr_leaves, xen_cpuid_leaf_t *leaves,
+ uint32_t *nr_msrs, xen_msr_entry_t *msrs);
+
uint32_t xc_get_cpu_featureset_size(void);
enum xc_static_cpu_featuremask {
}
}
+int xc_get_cpu_policy_size(xc_interface *xch, uint32_t *nr_leaves,
+ uint32_t *nr_msrs)
+{
+ struct xen_sysctl sysctl = {};
+ int ret;
+
+ sysctl.cmd = XEN_SYSCTL_get_cpu_policy;
+
+ ret = do_sysctl(xch, &sysctl);
+
+ if ( !ret )
+ {
+ *nr_leaves = sysctl.u.cpu_policy.nr_leaves;
+ *nr_msrs = sysctl.u.cpu_policy.nr_msrs;
+ }
+
+ return ret;
+}
+
+int xc_get_system_cpu_policy(xc_interface *xch, uint32_t index,
+ uint32_t *nr_leaves, xen_cpuid_leaf_t *leaves,
+ uint32_t *nr_msrs, xen_msr_entry_t *msrs)
+{
+ struct xen_sysctl sysctl = {};
+ DECLARE_HYPERCALL_BOUNCE(leaves,
+ *nr_leaves * sizeof(*leaves),
+ XC_HYPERCALL_BUFFER_BOUNCE_OUT);
+ DECLARE_HYPERCALL_BOUNCE(msrs,
+ *nr_msrs * sizeof(*msrs),
+ XC_HYPERCALL_BUFFER_BOUNCE_OUT);
+ int ret;
+
+ if ( xc_hypercall_bounce_pre(xch, leaves) ||
+ xc_hypercall_bounce_pre(xch, msrs) )
+ return -1;
+
+ sysctl.cmd = XEN_SYSCTL_get_cpu_policy;
+ sysctl.u.cpu_policy.index = index;
+ sysctl.u.cpu_policy.nr_leaves = *nr_leaves;
+ set_xen_guest_handle(sysctl.u.cpu_policy.cpuid_policy, leaves);
+ sysctl.u.cpu_policy.nr_msrs = *nr_msrs;
+ set_xen_guest_handle(sysctl.u.cpu_policy.msr_policy, msrs);
+
+ ret = do_sysctl(xch, &sysctl);
+
+ xc_hypercall_bounce_post(xch, leaves);
+ xc_hypercall_bounce_post(xch, msrs);
+
+ if ( !ret )
+ {
+ *nr_leaves = sysctl.u.cpu_policy.nr_leaves;
+ *nr_msrs = sysctl.u.cpu_policy.nr_msrs;
+ }
+
+ return ret;
+}
+
struct cpuid_domain_info
{
enum
free(featuresets[i].fs);
}
+static void print_policy(const char *name,
+ xen_cpuid_leaf_t *leaves, uint32_t nr_leaves,
+ xen_msr_entry_t *msrs, uint32_t nr_msrs)
+{
+ unsigned int l;
+
+ printf("%s policy: %u leaves, %u MSRs\n", name, nr_leaves, nr_msrs);
+ printf(" CPUID:\n");
+ printf(" %-8s %-8s -> %-8s %-8s %-8s %-8s\n",
+ "leaf", "subleaf", "eax", "ebx", "ecx", "edx");
+ for ( l = 0; l < nr_leaves; ++l )
+ {
+ /* Skip empty leaves. */
+ if ( !leaves[l].a && !leaves[l].b && !leaves[l].c && !leaves[l].d )
+ continue;
+
+ printf(" %08x:%08x -> %08x:%08x:%08x:%08x\n",
+ leaves[l].leaf, leaves[l].subleaf,
+ leaves[l].a, leaves[l].b, leaves[l].c, leaves[l].d);
+ }
+
+ printf(" MSRs:\n");
+ printf(" %-8s -> %-16s\n", "index", "value");
+ for ( l = 0; l < nr_msrs; ++l )
+ printf(" %08x -> %016lx\n",
+ msrs[l].idx, msrs[l].val);
+}
+
int main(int argc, char **argv)
{
- enum { MODE_UNKNOWN, MODE_INFO, MODE_DETAIL, MODE_INTERPRET }
+ enum { MODE_UNKNOWN, MODE_INFO, MODE_DETAIL, MODE_INTERPRET, MODE_POLICY }
mode = MODE_UNKNOWN;
nr_features = xc_get_cpu_featureset_size();
{ "info", no_argument, NULL, 'i' },
{ "detail", no_argument, NULL, 'd' },
{ "verbose", no_argument, NULL, 'v' },
+ { "policy", no_argument, NULL, 'p' },
{ NULL, 0, NULL, 0 },
};
- c = getopt_long(argc, argv, "hidv", long_options, &option_index);
+ c = getopt_long(argc, argv, "hidvp", long_options, &option_index);
if ( c == -1 )
break;
mode = MODE_INFO;
break;
+ case 'p':
+ mode = MODE_POLICY;
+ break;
+
case 'd':
case 'v':
mode = MODE_DETAIL;
mode = MODE_INTERPRET;
}
- if ( mode == MODE_INFO || mode == MODE_DETAIL )
+ if ( mode == MODE_POLICY )
+ {
+ static const char *const sys_policies[] = {
+ [ XEN_SYSCTL_cpu_policy_raw ] = "Raw",
+ [ XEN_SYSCTL_cpu_policy_host ] = "Host",
+ [ XEN_SYSCTL_cpu_policy_pv_max ] = "PV Max",
+ [ XEN_SYSCTL_cpu_policy_hvm_max ] = "HVM Max",
+ [ XEN_SYSCTL_cpu_policy_pv_default ] = "PV Default",
+ [ XEN_SYSCTL_cpu_policy_hvm_default ] = "HVM Default",
+ };
+ xen_cpuid_leaf_t *leaves;
+ xen_msr_entry_t *msrs;
+ uint32_t i, max_leaves, max_msrs;
+
+ xc_interface *xch = xc_interface_open(0, 0, 0);
+
+ if ( !xch )
+ err(1, "xc_interface_open");
+
+ if ( xc_get_cpu_policy_size(xch, &max_leaves, &max_msrs) )
+ err(1, "xc_get_cpu_policy_size(...)");
+ printf("Xen reports there are maximum %u leaves and %u MSRs\n",
+ max_leaves, max_msrs);
+
+ leaves = calloc(max_leaves, sizeof(xen_cpuid_leaf_t));
+ if ( !leaves )
+ err(1, "calloc(max_leaves)");
+ msrs = calloc(max_msrs, sizeof(xen_msr_entry_t));
+ if ( !msrs )
+ err(1, "calloc(max_msrs)");
+
+ for ( i = 0; i < ARRAY_SIZE(sys_policies); ++i )
+ {
+ uint32_t nr_leaves = max_leaves;
+ uint32_t nr_msrs = max_msrs;
+
+ if ( xc_get_system_cpu_policy(xch, i, &nr_leaves, leaves,
+ &nr_msrs, msrs) )
+ err(1, "xc_get_system_cpu_policy(, %s,,)", sys_policies[i]);
+
+ print_policy(sys_policies[i], leaves, nr_leaves, msrs, nr_msrs);
+ }
+
+ free(leaves);
+ free(msrs);
+ xc_interface_close(xch);
+ }
+ else if ( mode == MODE_INFO || mode == MODE_DETAIL )
{
xc_interface *xch = xc_interface_open(0, 0, 0);
#include <xen/types.h>
#include <xen/lib.h>
#include <xen/mm.h>
+#include <xen/nospec.h>
#include <xen/guest_access.h>
#include <xen/hypercall.h>
#include <public/sysctl.h>
break;
}
+ case XEN_SYSCTL_get_cpu_policy:
+ {
+ const struct cpu_policy *policy;
+
+ /* Reserved field set, or bad policy index? */
+ if ( sysctl->u.cpu_policy._rsvd ||
+ sysctl->u.cpu_policy.index >= ARRAY_SIZE(system_policies) )
+ {
+ ret = -EINVAL;
+ break;
+ }
+ policy = &system_policies[
+ array_index_nospec(sysctl->u.cpu_policy.index,
+ ARRAY_SIZE(system_policies))];
+
+ /* Process the CPUID leaves. */
+ if ( guest_handle_is_null(sysctl->u.cpu_policy.cpuid_policy) )
+ sysctl->u.cpu_policy.nr_leaves = CPUID_MAX_SERIALISED_LEAVES;
+ else if ( (ret = x86_cpuid_copy_to_buffer(
+ policy->cpuid,
+ sysctl->u.cpu_policy.cpuid_policy,
+ &sysctl->u.cpu_policy.nr_leaves)) )
+ break;
+
+ if ( __copy_field_to_guest(u_sysctl, sysctl,
+ u.cpu_policy.nr_leaves) )
+ {
+ ret = -EFAULT;
+ break;
+ }
+
+ /* Process the MSR entries. */
+ if ( guest_handle_is_null(sysctl->u.cpu_policy.msr_policy) )
+ sysctl->u.cpu_policy.nr_msrs = MSR_MAX_SERIALISED_ENTRIES;
+ else if ( (ret = x86_msr_copy_to_buffer(
+ policy->msr,
+ sysctl->u.cpu_policy.msr_policy,
+ &sysctl->u.cpu_policy.nr_msrs)) )
+ break;
+
+ if ( __copy_field_to_guest(u_sysctl, sysctl,
+ u.cpu_policy.nr_msrs) )
+ ret = -EFAULT;
+
+ break;
+ }
+
default:
ret = -ENOSYS;
break;
* - Default_*: Default set of features a PV or HVM guest can use. This is
* the security supported set.
*/
+struct xen_sysctl_cpu_policy {
#define XEN_SYSCTL_cpu_policy_raw 0
#define XEN_SYSCTL_cpu_policy_host 1
#define XEN_SYSCTL_cpu_policy_pv_max 2
#define XEN_SYSCTL_cpu_policy_hvm_max 3
#define XEN_SYSCTL_cpu_policy_pv_default 4
#define XEN_SYSCTL_cpu_policy_hvm_default 5
+ uint32_t index; /* IN: Which policy to query? */
+ uint32_t nr_leaves; /* IN/OUT: Number of leaves in/written to
+ * 'cpuid_policy', or the maximum number of leaves
+ * if the guest handle is NULL. */
+ uint32_t nr_msrs; /* IN/OUT: Number of MSRs in/written to
+ * 'msr_policy', or the maximum number of MSRs if
+ * the guest handle is NULL. */
+ uint32_t _rsvd; /* Must be zero. */
+ XEN_GUEST_HANDLE_64(xen_cpuid_leaf_t) cpuid_policy; /* OUT */
+ XEN_GUEST_HANDLE_64(xen_msr_entry_t) msr_policy; /* OUT */
+};
+typedef struct xen_sysctl_cpu_policy xen_sysctl_cpu_policy_t;
+DEFINE_XEN_GUEST_HANDLE(xen_sysctl_cpu_policy_t);
#endif
struct xen_sysctl {
#define XEN_SYSCTL_get_cpu_featureset 26
#define XEN_SYSCTL_livepatch_op 27
#define XEN_SYSCTL_set_parameter 28
+#define XEN_SYSCTL_get_cpu_policy 29
uint32_t interface_version; /* XEN_SYSCTL_INTERFACE_VERSION */
union {
struct xen_sysctl_readconsole readconsole;
struct xen_sysctl_cpu_featureset cpu_featureset;
struct xen_sysctl_livepatch_op livepatch;
struct xen_sysctl_set_parameter set_parameter;
+#if defined(__i386__) || defined(__x86_64__)
+ struct xen_sysctl_cpu_policy cpu_policy;
+#endif
uint8_t pad[128];
} u;
};
case XEN_SYSCTL_cputopoinfo:
case XEN_SYSCTL_numainfo:
case XEN_SYSCTL_pcitopoinfo:
+ case XEN_SYSCTL_get_cpu_policy:
return domain_has_xen(current->domain, XEN__PHYSINFO);
case XEN_SYSCTL_psr_cmt_op:
# XENPF_microcode_update
microcode
# XEN_SYSCTL_physinfo, XEN_SYSCTL_cputopoinfo, XEN_SYSCTL_numainfo
-# XEN_SYSCTL_pcitopoinfo
+# XEN_SYSCTL_pcitopoinfo, XEN_SYSCTL_get_cpu_policy
physinfo
# XENPF_platform_quirk
quirk
projects / people / sstabellini / xen-unstable.git / .git / commitdiff