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s390: Remove protvirt and kvm config guards for uv code

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Removing the CONFIG_PROTECTED_VIRTUALIZATION_GUEST ifdefs and config
option as well as CONFIG_KVM ifdefs in uv files.

Having this configurable has been more of a pain than a help.
It's time to remove the ifdefs and the config option.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Janosch Frank 2024-07-04 11:02:46 +00:00 committed by Vasily Gorbik
parent 8f1e70adb1
commit 6dc2e98d5f
11 changed files with 18 additions and 93 deletions
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11
arch/s390/Kconfig
View file

@ -799,17 +799,6 @@ config HAVE_PNETID
menu "Virtualization"
config PROTECTED_VIRTUALIZATION_GUEST
def_bool n
prompt "Protected virtualization guest support"
help
Select this option, if you want to be able to run this
kernel as a protected virtualization KVM guest.
Protected virtualization capable machines have a mini hypervisor
located at machine level (an ultravisor). With help of the
Ultravisor, KVM will be able to run "protected" VMs, special
VMs whose memory and management data are unavailable to KVM.
config PFAULT
def_bool y
prompt "Pseudo page fault support"

3
arch/s390/boot/Makefile
View file

@ -39,8 +39,7 @@ CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
obj-y := head.o als.o startup.o physmem_info.o ipl_parm.o ipl_report.o vmem.o
obj-y += string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o
obj-y += version.o pgm_check_info.o ctype.o ipl_data.o relocs.o alternative.o
obj-$(findstring y, $(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) $(CONFIG_PGSTE)) += uv.o
obj-y += version.o pgm_check_info.o ctype.o ipl_data.o relocs.o alternative.o uv.o
obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o
obj-y += $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o
obj-$(CONFIG_KERNEL_ZSTD) += clz_ctz.o

8
arch/s390/boot/uv.c
View file

@ -8,12 +8,8 @@
#include "uv.h"
/* will be used in arch/s390/kernel/uv.c */
#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
int __bootdata_preserved(prot_virt_guest);
#endif
#if IS_ENABLED(CONFIG_KVM)
int __bootdata_preserved(prot_virt_host);
#endif
struct uv_info __bootdata_preserved(uv_info);
void uv_query_info(void)
@ -53,14 +49,11 @@ void uv_query_info(void)
uv_info.max_secrets = uvcb.max_secrets;
}
#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) &&
test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list))
prot_virt_guest = 1;
#endif
}
#if IS_ENABLED(CONFIG_KVM)
unsigned long adjust_to_uv_max(unsigned long limit)
{
if (is_prot_virt_host() && uv_info.max_sec_stor_addr)
@ -92,4 +85,3 @@ void sanitize_prot_virt_host(void)
{
prot_virt_host = is_prot_virt_host_capable();
}
#endif

13
arch/s390/boot/uv.h
View file

@ -2,21 +2,8 @@
#ifndef BOOT_UV_H
#define BOOT_UV_H
#if IS_ENABLED(CONFIG_KVM)
unsigned long adjust_to_uv_max(unsigned long limit);
void sanitize_prot_virt_host(void);
#else
static inline unsigned long adjust_to_uv_max(unsigned long limit)
{
return limit;
}
static inline void sanitize_prot_virt_host(void) {}
#endif
#if defined(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) || IS_ENABLED(CONFIG_KVM)
void uv_query_info(void);
#else
static inline void uv_query_info(void) {}
#endif
#endif /* BOOT_UV_H */

1
arch/s390/configs/debug_defconfig
View file

@ -55,7 +55,6 @@ CONFIG_EXPOLINE_AUTO=y
CONFIG_CHSC_SCH=y
CONFIG_VFIO_CCW=m
CONFIG_VFIO_AP=m
CONFIG_PROTECTED_VIRTUALIZATION_GUEST=y
CONFIG_CMM=m
CONFIG_APPLDATA_BASE=y
CONFIG_S390_HYPFS_FS=y

1
arch/s390/configs/defconfig
View file

@ -53,7 +53,6 @@ CONFIG_EXPOLINE_AUTO=y
CONFIG_CHSC_SCH=y
CONFIG_VFIO_CCW=m
CONFIG_VFIO_AP=m
CONFIG_PROTECTED_VIRTUALIZATION_GUEST=y
CONFIG_CMM=m
CONFIG_APPLDATA_BASE=y
CONFIG_S390_HYPFS_FS=y

2
arch/s390/include/asm/page.h
View file

@ -174,12 +174,10 @@ static inline int devmem_is_allowed(unsigned long pfn)
#define HAVE_ARCH_FREE_PAGE
#define HAVE_ARCH_ALLOC_PAGE
#if IS_ENABLED(CONFIG_PGSTE)
int arch_make_folio_accessible(struct folio *folio);
#define HAVE_ARCH_MAKE_FOLIO_ACCESSIBLE
int arch_make_page_accessible(struct page *page);
#define HAVE_ARCH_MAKE_PAGE_ACCESSIBLE
#endif
struct vm_layout {
unsigned long kaslr_offset;

32
arch/s390/include/asm/uv.h
View file

@ -414,7 +414,6 @@ static inline bool uv_has_feature(u8 feature_bit)
return test_bit_inv(feature_bit, &uv_info.uv_feature_indications);
}
#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
extern int prot_virt_guest;
static inline int is_prot_virt_guest(void)
@ -466,13 +465,6 @@ static inline int uv_remove_shared(unsigned long addr)
return share(addr, UVC_CMD_REMOVE_SHARED_ACCESS);
}
#else
#define is_prot_virt_guest() 0
static inline int uv_set_shared(unsigned long addr) { return 0; }
static inline int uv_remove_shared(unsigned long addr) { return 0; }
#endif
#if IS_ENABLED(CONFIG_KVM)
extern int prot_virt_host;
static inline int is_prot_virt_host(void)
@ -489,29 +481,5 @@ int uv_convert_from_secure_pte(pte_t pte);
int gmap_convert_to_secure(struct gmap *gmap, unsigned long gaddr);
void setup_uv(void);
#else
#define is_prot_virt_host() 0
static inline void setup_uv(void) {}
static inline int uv_pin_shared(unsigned long paddr)
{
return 0;
}
static inline int uv_destroy_folio(struct folio *folio)
{
return 0;
}
static inline int uv_destroy_pte(pte_t pte)
{
return 0;
}
static inline int uv_convert_from_secure_pte(pte_t pte)
{
return 0;
}
#endif
#endif /* _ASM_S390_UV_H */

3
arch/s390/kernel/Makefile
View file

@ -43,7 +43,7 @@ obj-y += sysinfo.o lgr.o os_info.o ctlreg.o
obj-y += runtime_instr.o cache.o fpu.o dumpstack.o guarded_storage.o sthyi.o
obj-y += entry.o reipl.o kdebugfs.o alternative.o
obj-y += nospec-branch.o ipl_vmparm.o machine_kexec_reloc.o unwind_bc.o
obj-y += smp.o text_amode31.o stacktrace.o abs_lowcore.o facility.o
obj-y += smp.o text_amode31.o stacktrace.o abs_lowcore.o facility.o uv.o
extra-y += vmlinux.lds
@ -80,7 +80,6 @@ obj-$(CONFIG_PERF_EVENTS) += perf_cpum_cf_events.o perf_regs.o
obj-$(CONFIG_PERF_EVENTS) += perf_pai_crypto.o perf_pai_ext.o
obj-$(CONFIG_TRACEPOINTS) += trace.o
obj-$(findstring y, $(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) $(CONFIG_PGSTE)) += uv.o
# vdso
obj-y += vdso64/

35
arch/s390/kernel/uv.c
View file

@ -18,11 +18,22 @@
#include <asm/sections.h>
#include <asm/uv.h>
#if !IS_ENABLED(CONFIG_KVM)
unsigned long __gmap_translate(struct gmap *gmap, unsigned long gaddr)
{
return 0;
}
int gmap_fault(struct gmap *gmap, unsigned long gaddr,
unsigned int fault_flags)
{
return 0;
}
#endif
/* the bootdata_preserved fields come from ones in arch/s390/boot/uv.c */
#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
int __bootdata_preserved(prot_virt_guest);
EXPORT_SYMBOL(prot_virt_guest);
#endif
/*
* uv_info contains both host and guest information but it's currently only
@ -35,7 +46,6 @@ EXPORT_SYMBOL(prot_virt_guest);
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);
@ -543,9 +553,6 @@ int arch_make_page_accessible(struct page *page)
return arch_make_folio_accessible(page_folio(page));
}
EXPORT_SYMBOL_GPL(arch_make_page_accessible);
#endif
#if defined(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) || IS_ENABLED(CONFIG_KVM)
static ssize_t uv_query_facilities(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
@ -721,24 +728,13 @@ static struct attribute_group uv_query_attr_group = {
static ssize_t uv_is_prot_virt_guest(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
int val = 0;
#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
val = prot_virt_guest;
#endif
return sysfs_emit(buf, "%d\n", val);
return sysfs_emit(buf, "%d\n", prot_virt_guest);
}
static ssize_t uv_is_prot_virt_host(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
int val = 0;
#if IS_ENABLED(CONFIG_KVM)
val = prot_virt_host;
#endif
return sysfs_emit(buf, "%d\n", val);
return sysfs_emit(buf, "%d\n", prot_virt_host);
}
static struct kobj_attribute uv_prot_virt_guest =
@ -790,4 +786,3 @@ static int __init uv_info_init(void)
return rc;
}
device_initcall(uv_info_init);
#endif

2
drivers/s390/char/Kconfig
View file

@ -96,7 +96,7 @@ config SCLP_OFB
config S390_UV_UAPI
def_tristate m
prompt "Ultravisor userspace API"
depends on S390 && (KVM || PROTECTED_VIRTUALIZATION_GUEST)
depends on S390
help
Selecting exposes parts of the UV interface to userspace
by providing a misc character device at /dev/uv.