diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-07-03 15:32:22 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-07-03 15:32:22 -0700 |
commit | e8069f5a8e3bdb5fdeeff895780529388592ee7a (patch) | |
tree | ce35ab85db9b66a7e488707fccdb33ce54f696dd /arch/s390/kernel/uv.c | |
parent | eded37770c9f80ecd5ba842359c4f1058d9812c3 (diff) | |
parent | 255006adb3da71bb75c334453786df781b415f54 (diff) |
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm updates from Paolo Bonzini:
"ARM64:
- Eager page splitting optimization for dirty logging, optionally
allowing for a VM to avoid the cost of hugepage splitting in the
stage-2 fault path.
- Arm FF-A proxy for pKVM, allowing a pKVM host to safely interact
with services that live in the Secure world. pKVM intervenes on
FF-A calls to guarantee the host doesn't misuse memory donated to
the hyp or a pKVM guest.
- Support for running the split hypervisor with VHE enabled, known as
'hVHE' mode. This is extremely useful for testing the split
hypervisor on VHE-only systems, and paves the way for new use cases
that depend on having two TTBRs available at EL2.
- Generalized framework for configurable ID registers from userspace.
KVM/arm64 currently prevents arbitrary CPU feature set
configuration from userspace, but the intent is to relax this
limitation and allow userspace to select a feature set consistent
with the CPU.
- Enable the use of Branch Target Identification (FEAT_BTI) in the
hypervisor.
- Use a separate set of pointer authentication keys for the
hypervisor when running in protected mode, as the host is untrusted
at runtime.
- Ensure timer IRQs are consistently released in the init failure
paths.
- Avoid trapping CTR_EL0 on systems with Enhanced Virtualization
Traps (FEAT_EVT), as it is a register commonly read from userspace.
- Erratum workaround for the upcoming AmpereOne part, which has
broken hardware A/D state management.
RISC-V:
- Redirect AMO load/store misaligned traps to KVM guest
- Trap-n-emulate AIA in-kernel irqchip for KVM guest
- Svnapot support for KVM Guest
s390:
- New uvdevice secret API
- CMM selftest and fixes
- fix racy access to target CPU for diag 9c
x86:
- Fix missing/incorrect #GP checks on ENCLS
- Use standard mmu_notifier hooks for handling APIC access page
- Drop now unnecessary TR/TSS load after VM-Exit on AMD
- Print more descriptive information about the status of SEV and
SEV-ES during module load
- Add a test for splitting and reconstituting hugepages during and
after dirty logging
- Add support for CPU pinning in demand paging test
- Add support for AMD PerfMonV2, with a variety of cleanups and minor
fixes included along the way
- Add a "nx_huge_pages=never" option to effectively avoid creating NX
hugepage recovery threads (because nx_huge_pages=off can be toggled
at runtime)
- Move handling of PAT out of MTRR code and dedup SVM+VMX code
- Fix output of PIC poll command emulation when there's an interrupt
- Add a maintainer's handbook to document KVM x86 processes,
preferred coding style, testing expectations, etc.
- Misc cleanups, fixes and comments
Generic:
- Miscellaneous bugfixes and cleanups
Selftests:
- Generate dependency files so that partial rebuilds work as
expected"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (153 commits)
Documentation/process: Add a maintainer handbook for KVM x86
Documentation/process: Add a label for the tip tree handbook's coding style
KVM: arm64: Fix misuse of KVM_ARM_VCPU_POWER_OFF bit index
RISC-V: KVM: Remove unneeded semicolon
RISC-V: KVM: Allow Svnapot extension for Guest/VM
riscv: kvm: define vcpu_sbi_ext_pmu in header
RISC-V: KVM: Expose IMSIC registers as attributes of AIA irqchip
RISC-V: KVM: Add in-kernel virtualization of AIA IMSIC
RISC-V: KVM: Expose APLIC registers as attributes of AIA irqchip
RISC-V: KVM: Add in-kernel emulation of AIA APLIC
RISC-V: KVM: Implement device interface for AIA irqchip
RISC-V: KVM: Skeletal in-kernel AIA irqchip support
RISC-V: KVM: Set kvm_riscv_aia_nr_hgei to zero
RISC-V: KVM: Add APLIC related defines
RISC-V: KVM: Add IMSIC related defines
RISC-V: KVM: Implement guest external interrupt line management
KVM: x86: Remove PRIx* definitions as they are solely for user space
s390/uv: Update query for secret-UVCs
s390/uv: replace scnprintf with sysfs_emit
s390/uvdevice: Add 'Lock Secret Store' UVC
...
Diffstat (limited to 'arch/s390/kernel/uv.c')
-rw-r--r-- | arch/s390/kernel/uv.c | 108 |
1 files changed, 75 insertions, 33 deletions
diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c index 3c62d1b218b1..66f0eb1c872b 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -23,12 +23,20 @@ int __bootdata_preserved(prot_virt_guest); #endif +/* + * uv_info contains both host and guest information but it's currently only + * expected to be used within modules if it's the KVM module or for + * any PV guest module. + * + * The kernel itself will write these values once in uv_query_info() + * and then make some of them readable via a sysfs interface. + */ struct uv_info __bootdata_preserved(uv_info); +EXPORT_SYMBOL(uv_info); #if IS_ENABLED(CONFIG_KVM) int __bootdata_preserved(prot_virt_host); EXPORT_SYMBOL(prot_virt_host); -EXPORT_SYMBOL(uv_info); static int __init uv_init(phys_addr_t stor_base, unsigned long stor_len) { @@ -462,13 +470,13 @@ EXPORT_SYMBOL_GPL(arch_make_page_accessible); #if defined(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) || IS_ENABLED(CONFIG_KVM) static ssize_t uv_query_facilities(struct kobject *kobj, - struct kobj_attribute *attr, char *page) + struct kobj_attribute *attr, char *buf) { - return scnprintf(page, PAGE_SIZE, "%lx\n%lx\n%lx\n%lx\n", - uv_info.inst_calls_list[0], - uv_info.inst_calls_list[1], - uv_info.inst_calls_list[2], - uv_info.inst_calls_list[3]); + return sysfs_emit(buf, "%lx\n%lx\n%lx\n%lx\n", + uv_info.inst_calls_list[0], + uv_info.inst_calls_list[1], + uv_info.inst_calls_list[2], + uv_info.inst_calls_list[3]); } static struct kobj_attribute uv_query_facilities_attr = @@ -493,30 +501,27 @@ static struct kobj_attribute uv_query_supp_se_hdr_pcf_attr = __ATTR(supp_se_hdr_pcf, 0444, uv_query_supp_se_hdr_pcf, NULL); static ssize_t uv_query_dump_cpu_len(struct kobject *kobj, - struct kobj_attribute *attr, char *page) + struct kobj_attribute *attr, char *buf) { - return scnprintf(page, PAGE_SIZE, "%lx\n", - uv_info.guest_cpu_stor_len); + return sysfs_emit(buf, "%lx\n", uv_info.guest_cpu_stor_len); } static struct kobj_attribute uv_query_dump_cpu_len_attr = __ATTR(uv_query_dump_cpu_len, 0444, uv_query_dump_cpu_len, NULL); static ssize_t uv_query_dump_storage_state_len(struct kobject *kobj, - struct kobj_attribute *attr, char *page) + struct kobj_attribute *attr, char *buf) { - return scnprintf(page, PAGE_SIZE, "%lx\n", - uv_info.conf_dump_storage_state_len); + return sysfs_emit(buf, "%lx\n", uv_info.conf_dump_storage_state_len); } static struct kobj_attribute uv_query_dump_storage_state_len_attr = __ATTR(dump_storage_state_len, 0444, uv_query_dump_storage_state_len, NULL); static ssize_t uv_query_dump_finalize_len(struct kobject *kobj, - struct kobj_attribute *attr, char *page) + struct kobj_attribute *attr, char *buf) { - return scnprintf(page, PAGE_SIZE, "%lx\n", - uv_info.conf_dump_finalize_len); + return sysfs_emit(buf, "%lx\n", uv_info.conf_dump_finalize_len); } static struct kobj_attribute uv_query_dump_finalize_len_attr = @@ -532,53 +537,86 @@ static struct kobj_attribute uv_query_feature_indications_attr = __ATTR(feature_indications, 0444, uv_query_feature_indications, NULL); static ssize_t uv_query_max_guest_cpus(struct kobject *kobj, - struct kobj_attribute *attr, char *page) + struct kobj_attribute *attr, char *buf) { - return scnprintf(page, PAGE_SIZE, "%d\n", - uv_info.max_guest_cpu_id + 1); + return sysfs_emit(buf, "%d\n", uv_info.max_guest_cpu_id + 1); } static struct kobj_attribute uv_query_max_guest_cpus_attr = __ATTR(max_cpus, 0444, uv_query_max_guest_cpus, NULL); static ssize_t uv_query_max_guest_vms(struct kobject *kobj, - struct kobj_attribute *attr, char *page) + struct kobj_attribute *attr, char *buf) { - return scnprintf(page, PAGE_SIZE, "%d\n", - uv_info.max_num_sec_conf); + return sysfs_emit(buf, "%d\n", uv_info.max_num_sec_conf); } static struct kobj_attribute uv_query_max_guest_vms_attr = __ATTR(max_guests, 0444, uv_query_max_guest_vms, NULL); static ssize_t uv_query_max_guest_addr(struct kobject *kobj, - struct kobj_attribute *attr, char *page) + struct kobj_attribute *attr, char *buf) { - return scnprintf(page, PAGE_SIZE, "%lx\n", - uv_info.max_sec_stor_addr); + return sysfs_emit(buf, "%lx\n", uv_info.max_sec_stor_addr); } static struct kobj_attribute uv_query_max_guest_addr_attr = __ATTR(max_address, 0444, uv_query_max_guest_addr, NULL); static ssize_t uv_query_supp_att_req_hdr_ver(struct kobject *kobj, - struct kobj_attribute *attr, char *page) + struct kobj_attribute *attr, char *buf) { - return scnprintf(page, PAGE_SIZE, "%lx\n", uv_info.supp_att_req_hdr_ver); + return sysfs_emit(buf, "%lx\n", uv_info.supp_att_req_hdr_ver); } static struct kobj_attribute uv_query_supp_att_req_hdr_ver_attr = __ATTR(supp_att_req_hdr_ver, 0444, uv_query_supp_att_req_hdr_ver, NULL); static ssize_t uv_query_supp_att_pflags(struct kobject *kobj, - struct kobj_attribute *attr, char *page) + struct kobj_attribute *attr, char *buf) { - return scnprintf(page, PAGE_SIZE, "%lx\n", uv_info.supp_att_pflags); + return sysfs_emit(buf, "%lx\n", uv_info.supp_att_pflags); } static struct kobj_attribute uv_query_supp_att_pflags_attr = __ATTR(supp_att_pflags, 0444, uv_query_supp_att_pflags, NULL); +static ssize_t uv_query_supp_add_secret_req_ver(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "%lx\n", uv_info.supp_add_secret_req_ver); +} + +static struct kobj_attribute uv_query_supp_add_secret_req_ver_attr = + __ATTR(supp_add_secret_req_ver, 0444, uv_query_supp_add_secret_req_ver, NULL); + +static ssize_t uv_query_supp_add_secret_pcf(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "%lx\n", uv_info.supp_add_secret_pcf); +} + +static struct kobj_attribute uv_query_supp_add_secret_pcf_attr = + __ATTR(supp_add_secret_pcf, 0444, uv_query_supp_add_secret_pcf, NULL); + +static ssize_t uv_query_supp_secret_types(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "%lx\n", uv_info.supp_secret_types); +} + +static struct kobj_attribute uv_query_supp_secret_types_attr = + __ATTR(supp_secret_types, 0444, uv_query_supp_secret_types, NULL); + +static ssize_t uv_query_max_secrets(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "%d\n", uv_info.max_secrets); +} + +static struct kobj_attribute uv_query_max_secrets_attr = + __ATTR(max_secrets, 0444, uv_query_max_secrets, NULL); + static struct attribute *uv_query_attrs[] = { &uv_query_facilities_attr.attr, &uv_query_feature_indications_attr.attr, @@ -592,6 +630,10 @@ static struct attribute *uv_query_attrs[] = { &uv_query_dump_cpu_len_attr.attr, &uv_query_supp_att_req_hdr_ver_attr.attr, &uv_query_supp_att_pflags_attr.attr, + &uv_query_supp_add_secret_req_ver_attr.attr, + &uv_query_supp_add_secret_pcf_attr.attr, + &uv_query_supp_secret_types_attr.attr, + &uv_query_max_secrets_attr.attr, NULL, }; @@ -600,18 +642,18 @@ static struct attribute_group uv_query_attr_group = { }; static ssize_t uv_is_prot_virt_guest(struct kobject *kobj, - struct kobj_attribute *attr, char *page) + struct kobj_attribute *attr, char *buf) { int val = 0; #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST val = prot_virt_guest; #endif - return scnprintf(page, PAGE_SIZE, "%d\n", val); + return sysfs_emit(buf, "%d\n", val); } static ssize_t uv_is_prot_virt_host(struct kobject *kobj, - struct kobj_attribute *attr, char *page) + struct kobj_attribute *attr, char *buf) { int val = 0; @@ -619,7 +661,7 @@ static ssize_t uv_is_prot_virt_host(struct kobject *kobj, val = prot_virt_host; #endif - return scnprintf(page, PAGE_SIZE, "%d\n", val); + return sysfs_emit(buf, "%d\n", val); } static struct kobj_attribute uv_prot_virt_guest = |