[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen stable-4.14] x86/sysctl: Retrofit XEN_SYSCTL_cpu_featureset_{pv,hvm}_max
commit 0307a3f68eed7fe9fd3fc6dddf9706244b2bf86f Author: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> AuthorDate: Fri Mar 10 19:37:56 2023 +0000 Commit: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> CommitDate: Thu Aug 3 19:14:19 2023 +0100 x86/sysctl: Retrofit XEN_SYSCTL_cpu_featureset_{pv,hvm}_max Featuresets are supposed to be disappearing when the CPU policy infrastructure is complete, but that has taken longer than expected, and isn't going to be complete imminently either. In the meantime, Xen does have proper default/max featuresets, and xen-cpuid can even get them via the XEN_SYSCTL_cpu_policy_* interface, but only knows now to render them nicely via the featureset interface. Differences between default and max are a frequent source of errors, frequently too in secret leading up to an embargo, so extend the featureset sysctl to allow xen-cpuid to render them all nicely. Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> Acked-by: Jan Beulich <jbeulich@xxxxxxxx> Acked-by: Christian Lindig <christian.lindig@xxxxxxxxx> (cherry picked from commit 433d012c6c2737ad5a9aaa994355a4140d601852) --- tools/misc/xen-cpuid.c | 10 ++++++---- tools/ocaml/libs/xc/xenctrl.ml | 8 +++++++- tools/ocaml/libs/xc/xenctrl.mli | 8 +++++++- xen/arch/x86/sysctl.c | 4 +++- xen/include/public/sysctl.h | 2 ++ 5 files changed, 25 insertions(+), 7 deletions(-) diff --git a/tools/misc/xen-cpuid.c b/tools/misc/xen-cpuid.c index 6cb805c162..1e6baf98f6 100644 --- a/tools/misc/xen-cpuid.c +++ b/tools/misc/xen-cpuid.c @@ -233,10 +233,12 @@ static const struct { #define COL_ALIGN "18" static const char *const fs_names[] = { - [XEN_SYSCTL_cpu_featureset_host] = "Host", - [XEN_SYSCTL_cpu_featureset_raw] = "Raw", - [XEN_SYSCTL_cpu_featureset_pv] = "PV", - [XEN_SYSCTL_cpu_featureset_hvm] = "HVM", + [XEN_SYSCTL_cpu_featureset_raw] = "Raw", + [XEN_SYSCTL_cpu_featureset_host] = "Host", + [XEN_SYSCTL_cpu_featureset_pv] = "PV Default", + [XEN_SYSCTL_cpu_featureset_hvm] = "HVM Default", + [XEN_SYSCTL_cpu_featureset_pv_max] = "PV Max", + [XEN_SYSCTL_cpu_featureset_hvm_max] = "HVM Max", }; static void dump_leaf(uint32_t leaf, const char *const *strs) diff --git a/tools/ocaml/libs/xc/xenctrl.ml b/tools/ocaml/libs/xc/xenctrl.ml index 497ded7ce2..780cc71278 100644 --- a/tools/ocaml/libs/xc/xenctrl.ml +++ b/tools/ocaml/libs/xc/xenctrl.ml @@ -274,7 +274,13 @@ external version_changeset: handle -> string = "stub_xc_version_changeset" external version_capabilities: handle -> string = "stub_xc_version_capabilities" -type featureset_index = Featureset_raw | Featureset_host | Featureset_pv | Featureset_hvm +type featureset_index = + | Featureset_raw + | Featureset_host + | Featureset_pv + | Featureset_hvm + | Featureset_pv_max + | Featureset_hvm_max external get_cpu_featureset : handle -> featureset_index -> int64 array = "stub_xc_get_cpu_featureset" external watchdog : handle -> int -> int32 -> int diff --git a/tools/ocaml/libs/xc/xenctrl.mli b/tools/ocaml/libs/xc/xenctrl.mli index 26ec7e59b1..508f4ae829 100644 --- a/tools/ocaml/libs/xc/xenctrl.mli +++ b/tools/ocaml/libs/xc/xenctrl.mli @@ -212,7 +212,13 @@ external version_changeset : handle -> string = "stub_xc_version_changeset" external version_capabilities : handle -> string = "stub_xc_version_capabilities" -type featureset_index = Featureset_raw | Featureset_host | Featureset_pv | Featureset_hvm +type featureset_index = + | Featureset_raw + | Featureset_host + | Featureset_pv + | Featureset_hvm + | Featureset_pv_max + | Featureset_hvm_max external get_cpu_featureset : handle -> featureset_index -> int64 array = "stub_xc_get_cpu_featureset" external pages_to_kib : int64 -> int64 = "stub_pages_to_kib" diff --git a/xen/arch/x86/sysctl.c b/xen/arch/x86/sysctl.c index b0cb1b57e7..dc105cb463 100644 --- a/xen/arch/x86/sysctl.c +++ b/xen/arch/x86/sysctl.c @@ -357,14 +357,16 @@ long arch_do_sysctl( case XEN_SYSCTL_get_cpu_featureset: { - static const struct cpuid_policy *const policy_table[4] = { + static const struct cpuid_policy *const policy_table[6] = { [XEN_SYSCTL_cpu_featureset_raw] = &raw_cpuid_policy, [XEN_SYSCTL_cpu_featureset_host] = &host_cpuid_policy, #ifdef CONFIG_PV [XEN_SYSCTL_cpu_featureset_pv] = &pv_def_cpuid_policy, + [XEN_SYSCTL_cpu_featureset_pv_max] = &pv_max_cpuid_policy, #endif #ifdef CONFIG_HVM [XEN_SYSCTL_cpu_featureset_hvm] = &hvm_def_cpuid_policy, + [XEN_SYSCTL_cpu_featureset_hvm_max] = &hvm_max_cpuid_policy, #endif }; const struct cpuid_policy *p = NULL; diff --git a/xen/include/public/sysctl.h b/xen/include/public/sysctl.h index 7439cc154f..9091b469e2 100644 --- a/xen/include/public/sysctl.h +++ b/xen/include/public/sysctl.h @@ -804,6 +804,8 @@ struct xen_sysctl_cpu_featureset { #define XEN_SYSCTL_cpu_featureset_host 1 #define XEN_SYSCTL_cpu_featureset_pv 2 #define XEN_SYSCTL_cpu_featureset_hvm 3 +#define XEN_SYSCTL_cpu_featureset_pv_max 4 +#define XEN_SYSCTL_cpu_featureset_hvm_max 5 uint32_t index; /* IN: Which featureset to query? */ uint32_t nr_features; /* IN/OUT: Number of entries in/written to * 'features', or the maximum number of features if -- generated by git-patchbot for /home/xen/git/xen.git#stable-4.14
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