From c79d253226de3466cbc41401014d9a35507bff33 Mon Sep 17 00:00:00 2001 From: Roger Pau Monne Date: Wed, 17 Mar 2021 14:46:11 +0100 Subject: [PATCH] libs/guest: introduce helper to fetch a domain cpu policy MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Such helper is based on the existing functions to fetch a CPUID and MSR policies, but uses the xc_cpu_policy_t type to return the data to the caller. No user of the interface introduced on the patch. Signed-off-by: Roger Pau Monné Reviewed-by: Jan Beulich Acked-by: Andrew Cooper --- tools/include/xenctrl.h | 2 ++ tools/libs/guest/xg_cpuid_x86.c | 25 +++++++++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/tools/include/xenctrl.h b/tools/include/xenctrl.h index 187df5c5d2..34d979d11d 100644 --- a/tools/include/xenctrl.h +++ b/tools/include/xenctrl.h @@ -2599,6 +2599,8 @@ void xc_cpu_policy_destroy(xc_cpu_policy_t policy); /* Retrieve a system policy, or get/set a domains policy. */ int xc_cpu_policy_get_system(xc_interface *xch, unsigned int policy_idx, xc_cpu_policy_t policy); +int xc_cpu_policy_get_domain(xc_interface *xch, uint32_t domid, + xc_cpu_policy_t policy); int xc_get_cpu_levelling_caps(xc_interface *xch, uint32_t *caps); int xc_get_cpu_featureset(xc_interface *xch, uint32_t index, diff --git a/tools/libs/guest/xg_cpuid_x86.c b/tools/libs/guest/xg_cpuid_x86.c index dad560fb40..2cbc4b550f 100644 --- a/tools/libs/guest/xg_cpuid_x86.c +++ b/tools/libs/guest/xg_cpuid_x86.c @@ -737,3 +737,28 @@ int xc_cpu_policy_get_system(xc_interface *xch, unsigned int policy_idx, return rc; } + +int xc_cpu_policy_get_domain(xc_interface *xch, uint32_t domid, + xc_cpu_policy_t policy) +{ + unsigned int nr_leaves = ARRAY_SIZE(policy->leaves); + unsigned int nr_entries = ARRAY_SIZE(policy->entries); + int rc; + + rc = xc_get_domain_cpu_policy(xch, domid, &nr_leaves, policy->leaves, + &nr_entries, policy->entries); + if ( rc ) + { + PERROR("Failed to obtain domain %u policy", domid); + return rc; + } + + rc = deserialize_policy(xch, policy, nr_leaves, nr_entries); + if ( rc ) + { + errno = -rc; + rc = -1; + } + + return rc; +} -- 2.30.2