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: Alexander Gordeev <agordeev@linux•ibm.com>,
Andreas Grapentin <gra@linux•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>,
Friedrich Welter <fritz@linux•ibm.com>,
Gautam Gala <ggala@linux•ibm.com>,
Hariharan Mari <hari55@linux•ibm.com>,
Heiko Carstens <hca@linux•ibm.com>,
Hendrik Brueckner <brueckner@linux•ibm.com>,
Ilya Leoshkevich <iii@linux•ibm.com>,
Janosch Frank <frankja@linux•ibm.com>,
Joey Gouly <joey.gouly@arm•com>, Marc Zyngier <maz@kernel•org>,
Nico Boehr <nrb@linux•ibm.com>,
Nina Schoetterl-Glausch <oss@nina•schoetterlglausch.eu>,
Oliver Upton <oupton@kernel•org>,
Paolo Bonzini <pbonzini@redhat•com>,
Suzuki K Poulose <suzuki.poulose@arm•com>,
Sven Schnelle <svens@linux•ibm.com>,
Ulrich Weigand <Ulrich.Weigand@de•ibm.com>,
Vasily Gorbik <gor@linux•ibm.com>, Will Deacon <will@kernel•org>,
Zenghui Yu <yuzenghui@huawei•com>
Subject: [PATCH v3 16/27] KVM: Make device name configurable
Date: Fri, 29 May 2026 17:50:30 +0200 [thread overview]
Message-ID: <20260529155050.2902245-17-seiden@linux.ibm.com> (raw)
In-Reply-To: <20260529155050.2902245-1-seiden@linux.ibm.com>
Allow KVM implementations to choose alternative device names. This is
especially useful for architectures providing multiple KVM
implementations simultaneously.
Co-developed-by: Nina Schoetterl-Glausch <nsg@linux•ibm.com>
Signed-off-by: Nina Schoetterl-Glausch <nsg@linux•ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux•ibm.com>
---
include/linux/kvm_host.h | 4 +++-
virt/kvm/kvm_main.c | 21 ++++++++++++++-------
2 files changed, 17 insertions(+), 8 deletions(-)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 76da4196b684..f44885fc6e6a 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1069,7 +1069,9 @@ static inline void kvm_irqfd_exit(void)
{
}
#endif
-int kvm_init(unsigned vcpu_size, unsigned vcpu_align, struct module *module);
+int kvm_init(unsigned int vcpu_size, unsigned int vcpu_align, struct module *module);
+int kvm_init_with_dev(unsigned int vcpu_size, unsigned int vcpu_align,
+ struct module *module, const char *dev_name, int minor);
void kvm_exit(void);
bool file_is_kvm(struct file *file);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 2eca44a69a9a..454d99b45fa0 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -5541,9 +5541,7 @@ static struct file_operations kvm_chardev_ops = {
};
static struct miscdevice kvm_dev = {
- KVM_MINOR,
- "kvm",
- &kvm_chardev_ops,
+ .fops = &kvm_chardev_ops,
};
#ifdef CONFIG_KVM_GENERIC_HARDWARE_ENABLING
@@ -6321,13 +6319,13 @@ static void kvm_uevent_notify_change(unsigned int type, struct kvm *kvm)
kfree(env);
}
-static void kvm_init_debug(void)
+static void kvm_init_debug(const char *dev_name)
{
const struct file_operations *fops;
const struct kvm_stats_desc *pdesc;
int i;
- kvm_debugfs_dir = debugfs_create_dir("kvm", NULL);
+ kvm_debugfs_dir = debugfs_create_dir(dev_name, NULL);
for (i = 0; i < kvm_vm_stats_header.num_desc; ++i) {
pdesc = &kvm_vm_stats_desc[i];
@@ -6463,11 +6461,20 @@ void kvm_unregister_perf_callbacks(void)
}
#endif
-int kvm_init(unsigned vcpu_size, unsigned vcpu_align, struct module *module)
+int kvm_init(unsigned int vcpu_size, unsigned int vcpu_align, struct module *module)
+{
+ return kvm_init_with_dev(vcpu_size, vcpu_align, module, "kvm", KVM_MINOR);
+}
+
+int kvm_init_with_dev(unsigned int vcpu_size, unsigned int vcpu_align,
+ struct module *module, const char *dev_name, int minor)
{
int r;
int cpu;
+ kvm_dev.name = dev_name;
+ kvm_dev.minor = minor;
+
/* A kmem cache lets us meet the alignment requirements of fx_save. */
if (!vcpu_align)
vcpu_align = __alignof__(struct kvm_vcpu);
@@ -6505,7 +6512,7 @@ int kvm_init(unsigned vcpu_size, unsigned vcpu_align, struct module *module)
kvm_preempt_ops.sched_in = kvm_sched_in;
kvm_preempt_ops.sched_out = kvm_sched_out;
- kvm_init_debug();
+ kvm_init_debug(kvm_dev.name);
r = kvm_vfio_ops_init();
if (WARN_ON_ONCE(r))
--
2.53.0
next prev parent reply other threads:[~2026-05-29 15:51 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-29 15:50 [PATCH v3 00/27] KVM: s390: Introduce arm64 KVM Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 01/27] VFIO: take reference to the KVM module Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 02/27] KVM, vfio: remove symbol_get(kvm_get_kvm_safe) from vfio Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 03/27] KVM, vfio: remove symbol_get(kvm_put_kvm) " Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 04/27] uapi: KVM: Provide arm64 UAPI for other host architectures Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 05/27] arm64: Extract sysreg definitions Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 06/27] arm64: Provide arm64 API for non-native architectures Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 07/27] KVM: arm64: Provide arm64 KVM " Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 08/27] arm64: Extract pstate definitions from ptrace Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 09/27] KVM: arm64: Share kvm_emulate definitions Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 10/27] KVM: arm64: Make some arm64 KVM code shareable Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 11/27] KVM: arm64: Access elements of vcpu_gp_regs individually Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 12/27] KVM: arm64: Share reset general register code Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 13/27] KVM: arm64: Extract & share ipa size shift calculation Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 14/27] KVM: s390: Move s390 kvm code into a subdirectory Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 15/27] KVM: S390: Refactor gmap Steffen Eiden
2026-05-29 15:50 ` Steffen Eiden [this message]
2026-05-29 15:50 ` [PATCH v3 17/27] KVM: Remove KVM_MMIO as config option Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 18/27] KVM: s390: Prepare kvm-s390 for a second kvm module Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 19/27] s390: Introduce Start Arm Execution instruction Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 20/27] KVM: s390: arm64: Introduce host definitions Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 21/27] s390/hwcaps: Report SAE support as hwcap Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 22/27] KVM: s390: Add basic arm64 kvm module Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 23/27] KVM: s390: arm64: Implement required functions Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 24/27] KVM: s390: arm64: Implement vm/vcpu create destroy Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 25/27] KVM: s390: arm64: Implement vCPU IOCTLs Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 26/27] KVM: s390: arm64: Implement basic page fault handler Steffen Eiden
2026-05-29 15:50 ` [PATCH v3 27/27] KVM: s390: arm64: Enable KVM_ARM64 config and Kbuild Steffen Eiden
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260529155050.2902245-17-seiden@linux.ibm.com \
--to=seiden@linux$(echo .)ibm.com \
--cc=Ulrich.Weigand@de$(echo .)ibm.com \
--cc=agordeev@linux$(echo .)ibm.com \
--cc=arnd@arndb$(echo .)de \
--cc=borntraeger@linux$(echo .)ibm.com \
--cc=brueckner@linux$(echo .)ibm.com \
--cc=catalin.marinas@arm$(echo .)com \
--cc=david@kernel$(echo .)org \
--cc=frankja@linux$(echo .)ibm.com \
--cc=fritz@linux$(echo .)ibm.com \
--cc=ggala@linux$(echo .)ibm.com \
--cc=gor@linux$(echo .)ibm.com \
--cc=gra@linux$(echo .)ibm.com \
--cc=hari55@linux$(echo .)ibm.com \
--cc=hca@linux$(echo .)ibm.com \
--cc=iii@linux$(echo .)ibm.com \
--cc=imbrenda@linux$(echo .)ibm.com \
--cc=joey.gouly@arm$(echo .)com \
--cc=kvm@vger$(echo .)kernel.org \
--cc=kvmarm@lists$(echo .)linux.dev \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
--cc=linux-kernel@vger$(echo .)kernel.org \
--cc=linux-s390@vger$(echo .)kernel.org \
--cc=maz@kernel$(echo .)org \
--cc=nrb@linux$(echo .)ibm.com \
--cc=oss@nina$(echo .)schoetterlglausch.eu \
--cc=oupton@kernel$(echo .)org \
--cc=pbonzini@redhat$(echo .)com \
--cc=suzuki.poulose@arm$(echo .)com \
--cc=svens@linux$(echo .)ibm.com \
--cc=will@kernel$(echo .)org \
--cc=yuzenghui@huawei$(echo .)com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox