From: Steffen Eiden <seiden@linux.ibm.com>
To: kvm@vger.kernel.org, kvmarm@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Cc: Andreas Grapentin <Andreas.Grapentin@ibm.com>,
Arnd Bergmann <arnd@arndb.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
David Hildenbrand <david@kernel.org>,
Gautam Gala <ggala@linux.ibm.com>,
Hendrik Brueckner <brueckner@linux.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
Joey Gouly <joey.gouly@arm.com>, Marc Zyngier <maz@kernel.org>,
Nina Schoetterl-Glausch <oss@nina.schoetterlglausch.eu>,
Oliver Upton <oupton@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
Will Deacon <will@kernel.org>, Zenghui Yu <yuzenghui@huawei.com>
Subject: [PATCH v1 21/27] s390/hwcaps: Report SAE support as hwcap
Date: Thu, 2 Apr 2026 06:21:17 +0200 [thread overview]
Message-ID: <20260402042125.3948963-22-seiden@linux.ibm.com> (raw)
In-Reply-To: <20260402042125.3948963-1-seiden@linux.ibm.com>
From: Hendrik Brueckner <brueckner@linux.ibm.com>
Report SAE support as hwcap (and /proc/cpuinfo)
Signed-off-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
---
arch/s390/include/asm/elf.h | 2 ++
arch/s390/include/asm/sclp.h | 5 ++++-
arch/s390/kernel/processor.c | 3 +++
drivers/s390/char/sclp_early.c | 1 +
4 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h
index bb63fa4d20bb..ad3108ecfb07 100644
--- a/arch/s390/include/asm/elf.h
+++ b/arch/s390/include/asm/elf.h
@@ -123,6 +123,7 @@ enum {
HWCAP_NR_NNPA = 20,
HWCAP_NR_PCI_MIO = 21,
HWCAP_NR_SIE = 22,
+ HWCAP_NR_SAE = 23,
HWCAP_NR_MAX
};
@@ -150,6 +151,7 @@ enum {
#define HWCAP_NNPA BIT(HWCAP_NR_NNPA)
#define HWCAP_PCI_MIO BIT(HWCAP_NR_PCI_MIO)
#define HWCAP_SIE BIT(HWCAP_NR_SIE)
+#define HWCAP_SAE BIT(HWCAP_NR_SAE)
/*
* These are used to set parameters in the core dumps.
diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index 0f184dbdbe5e..18e46654227a 100644
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -52,7 +52,9 @@ struct sclp_core_entry {
u8 siif : 1;
u8 sigpif : 1;
u8 : 3;
- u8 reserved2[3];
+ u8 aef: 1;
+ u8 : 7;
+ u8 reserved2[2];
u8 : 2;
u8 ib : 1;
u8 cei : 1;
@@ -104,6 +106,7 @@ struct sclp_info {
unsigned char has_aisii : 1;
unsigned char has_aeni : 1;
unsigned char has_aisi : 1;
+ unsigned char has_aef : 1;
unsigned int ibc;
unsigned int mtid;
unsigned int mtid_cp;
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index e33a3eccda56..6da55a158027 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -150,6 +150,7 @@ static void show_cpu_summary(struct seq_file *m, void *v)
[HWCAP_NR_NNPA] = "nnpa",
[HWCAP_NR_PCI_MIO] = "pcimio",
[HWCAP_NR_SIE] = "sie",
+ [HWCAP_NR_SAE] = "sae",
};
int i, cpu;
@@ -254,6 +255,8 @@ static int __init setup_hwcaps(void)
/* virtualization support */
if (sclp.has_sief2)
elf_hwcap |= HWCAP_SIE;
+ if (sclp.has_aef)
+ elf_hwcap |= HWCAP_SAE;
return 0;
}
diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index 6bf501ad8ff0..26a76f09b19a 100644
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -94,6 +94,7 @@ static void __init sclp_early_facilities_detect(void)
sclp.has_ib = cpue->ib;
sclp.has_cei = cpue->cei;
sclp.has_skey = cpue->skey;
+ sclp.has_aef = cpue->aef;
break;
}
--
2.51.0
next prev parent reply other threads:[~2026-04-02 4:22 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-02 4:20 [PATCH v1 00/27] KVM: s390: Introduce arm64 KVM Steffen Eiden
2026-04-02 4:20 ` [PATCH v1 01/27] VFIO: take reference to the KVM module Steffen Eiden
2026-04-02 9:18 ` Paolo Bonzini
2026-04-02 4:20 ` [PATCH v1 02/27] KVM, vfio: remove symbol_get(kvm_get_kvm_safe) from vfio Steffen Eiden
2026-04-02 4:20 ` [PATCH v1 03/27] KVM, vfio: remove symbol_get(kvm_put_kvm) " Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 04/27] arm64: Provide arm64 UAPI for other host architectures Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 05/27] arm64: Extract sysreg definitions Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 06/27] arm64: Provide arm64 API for non-native architectures Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 07/27] KVM: arm64: Provide arm64 KVM " Steffen Eiden
2026-04-02 10:08 ` Marc Zyngier
2026-04-02 11:26 ` Christian Borntraeger
2026-04-02 4:21 ` [PATCH v1 08/27] arm64: Extract pstate definitions from ptrace Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 09/27] KVM: arm64: Share kvm_emulate definitions Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 10/27] KVM: arm64: Make some arm64 KVM code shareable Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 11/27] KVM: arm64: Access elements of vcpu_gp_regs individually Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 12/27] KVM: arm64: Share reset general register code Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 13/27] KVM: arm64: Extract & share ipa size shift calculation Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 14/27] KVM: s390: Move s390 kvm code into a subdirectory Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 15/27] KVM: S390: Refactor gmap Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 16/27] KVM: Make device name configurable Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 17/27] KVM: Remove KVM_MMIO as config option Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 18/27] KVM: s390: Prepare kvm-s390 for a second kvm module Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 19/27] s390: Introduce Start Arm Execution instruction Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 20/27] KVM: s390: arm64: Introduce host definitions Steffen Eiden
2026-04-02 4:21 ` Steffen Eiden [this message]
2026-04-02 4:21 ` [PATCH v1 22/27] KVM: s390: Add basic arm64 kvm module Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 23/27] KVM: s390: arm64: Implement required functions Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 24/27] KVM: s390: arm64: Implement vm/vcpu create destroy Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 25/27] KVM: s390: arm64: Implement vCPU IOCTLs Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 26/27] KVM: s390: arm64: Implement basic page fault handler Steffen Eiden
2026-04-02 4:21 ` [PATCH v1 27/27] KVM: s390: arm64: Enable KVM_ARM64 config and Kbuild Steffen Eiden
2026-04-02 8:53 ` [PATCH v1 00/27] KVM: s390: Introduce arm64 KVM David Hildenbrand (Arm)
2026-04-02 10:07 ` Christian Borntraeger
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