[PATCH 2/2] kvm: rename KVM_MAX_VCPU_ID to KVM_MAX_VCPU_IDS

Juergen Gross
2021-09-13T14:00:02Z

KVM_MAX_VCPU_ID is not specifying the highest allowed vcpu-id, but the
number of allowed vcpu-ids. This has already led to confusion, so
rename KVM_MAX_VCPU_ID to KVM_MAX_VCPU_IDS to make its semantics more
clear

Suggested-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
---
Documentation/virt/kvm/devices/xics.rst | 2 +-
Documentation/virt/kvm/devices/xive.rst | 2 +-
arch/mips/kvm/mips.c | 2 +-
arch/powerpc/include/asm/kvm_book3s.h | 2 +-
arch/powerpc/include/asm/kvm_host.h | 4 ++--
arch/powerpc/kvm/book3s_xive.c | 2 +-
arch/powerpc/kvm/powerpc.c | 2 +-
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/kvm/ioapic.c | 2 +-
arch/x86/kvm/ioapic.h | 4 ++--
arch/x86/kvm/x86.c | 2 +-
include/linux/kvm_host.h | 4 ++--
tools/testing/selftests/kvm/kvm_create_max_vcpus.c | 2 +-
virt/kvm/kvm_main.c | 2 +-
14 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/Documentation/virt/kvm/devices/xics.rst b/Documentation/virt/kvm/devices/xics.rst
index 2d6927e0b776..bf32c77174ab 100644
--- a/Documentation/virt/kvm/devices/xics.rst
+++ b/Documentation/virt/kvm/devices/xics.rst
@@ -22,7 +22,7 @@ Groups:
Errors:

======= ==========================================
- -EINVAL Value greater than KVM_MAX_VCPU_ID.
+ -EINVAL Value greater than KVM_MAX_VCPU_IDS.
-EFAULT Invalid user pointer for attr->addr.
-EBUSY A vcpu is already connected to the device.
======= ==========================================
diff --git a/Documentation/virt/kvm/devices/xive.rst b/Documentation/virt/kvm/devices/xive.rst
index 8bdf3dc38f01..8b5e7b40bdf8 100644
--- a/Documentation/virt/kvm/devices/xive.rst
+++ b/Documentation/virt/kvm/devices/xive.rst
@@ -91,7 +91,7 @@ the legacy interrupt mode, referred as XICS (POWER7/8).
Errors:

======= ==========================================
- -EINVAL Value greater than KVM_MAX_VCPU_ID.
+ -EINVAL Value greater than KVM_MAX_VCPU_IDS.
-EFAULT Invalid user pointer for attr->addr.
-EBUSY A vCPU is already connected to the device.
======= ==========================================
diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index 75c6f264c626..562aa878b266 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -1073,7 +1073,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = KVM_MAX_VCPUS;
break;
case KVM_CAP_MAX_VCPU_ID:
- r = KVM_MAX_VCPU_ID;
+ r = KVM_MAX_VCPU_IDS;
break;
case KVM_CAP_MIPS_FPU:
/* We don't handle systems with inconsistent cpu_has_fpu */
diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h
index caaa0f592d8e..3d31f2c59e43 100644
--- a/arch/powerpc/include/asm/kvm_book3s.h
+++ b/arch/powerpc/include/asm/kvm_book3s.h
@@ -434,7 +434,7 @@ extern int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu);
#define SPLIT_HACK_OFFS 0xfb000000

/*
- * This packs a VCPU ID from the [0..KVM_MAX_VCPU_ID) space down to the
+ * This packs a VCPU ID from the [0..KVM_MAX_VCPU_IDS) space down to the
* [0..KVM_MAX_VCPUS) space, using knowledge of the guest's core stride
* (but not its actual threading mode, which is not available) to avoid
* collisions.
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 080a7feb7731..59cb38b04ede 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -33,11 +33,11 @@

#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
#include <asm/kvm_book3s_asm.h> /* for MAX_SMT_THREADS */
-#define KVM_MAX_VCPU_ID (MAX_SMT_THREADS * KVM_MAX_VCORES)
+#define KVM_MAX_VCPU_IDS (MAX_SMT_THREADS * KVM_MAX_VCORES)
#define KVM_MAX_NESTED_GUESTS KVMPPC_NR_LPIDS

#else
-#define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
+#define KVM_MAX_VCPU_IDS KVM_MAX_VCPUS
#endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */

#define __KVM_HAVE_ARCH_INTC_INITIALIZED
diff --git a/arch/powerpc/kvm/book3s_xive.c b/arch/powerpc/kvm/book3s_xive.c
index a18db9e16ea4..225008882958 100644
--- a/arch/powerpc/kvm/book3s_xive.c
+++ b/arch/powerpc/kvm/book3s_xive.c
@@ -1928,7 +1928,7 @@ int kvmppc_xive_set_nr_servers(struct kvmppc_xive *xive, u64 addr)

pr_devel("%s nr_servers=%u\n", __func__, nr_servers);

- if (!nr_servers || nr_servers > KVM_MAX_VCPU_ID)
+ if (!nr_servers || nr_servers > KVM_MAX_VCPU_IDS)
return -EINVAL;

mutex_lock(&xive->lock);
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index b4e6f70b97b9..8ab90ce8738f 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -649,7 +649,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = KVM_MAX_VCPUS;
break;
case KVM_CAP_MAX_VCPU_ID:
- r = KVM_MAX_VCPU_ID;
+ r = KVM_MAX_VCPU_IDS;
break;
#ifdef CONFIG_PPC_BOOK3S_64
case KVM_CAP_PPC_GET_SMMU_INFO:
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index f8f48a7ec577..261b7d857fc0 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -50,7 +50,7 @@
* so ratio of 4 should be enough.
*/
#define KVM_VCPU_ID_RATIO 4
-#define KVM_MAX_VCPU_ID (KVM_MAX_VCPUS * KVM_VCPU_ID_RATIO)
+#define KVM_MAX_VCPU_IDS (KVM_MAX_VCPUS * KVM_VCPU_ID_RATIO)

/* memory slots that are not exposed to userspace */
#define KVM_PRIVATE_MEM_SLOTS 3
diff --git a/arch/x86/kvm/ioapic.c b/arch/x86/kvm/ioapic.c
index 698969e18fe3..3358123be946 100644
--- a/arch/x86/kvm/ioapic.c
+++ b/arch/x86/kvm/ioapic.c
@@ -96,7 +96,7 @@ static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic,
static void rtc_irq_eoi_tracking_reset(struct kvm_ioapic *ioapic)
{
ioapic->rtc_status.pending_eoi = 0;
- bitmap_zero(ioapic->rtc_status.dest_map.map, KVM_MAX_VCPU_ID);
+ bitmap_zero(ioapic->rtc_status.dest_map.map, KVM_MAX_VCPU_IDS);
}

static void kvm_rtc_eoi_tracking_restore_all(struct kvm_ioapic *ioapic);
diff --git a/arch/x86/kvm/ioapic.h b/arch/x86/kvm/ioapic.h
index 27e61ff3ac3e..e66e620c3bed 100644
--- a/arch/x86/kvm/ioapic.h
+++ b/arch/x86/kvm/ioapic.h
@@ -39,13 +39,13 @@ struct kvm_vcpu;

struct dest_map {
/* vcpu bitmap where IRQ has been sent */
- DECLARE_BITMAP(map, KVM_MAX_VCPU_ID);
+ DECLARE_BITMAP(map, KVM_MAX_VCPU_IDS);

/*
* Vector sent to a given vcpu, only valid when
* the vcpu's bit in map is set
*/
- u8 vectors[KVM_MAX_VCPU_ID];
+ u8 vectors[KVM_MAX_VCPU_IDS];
};

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 28ef14155726..fec43997522b 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4070,7 +4070,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = KVM_MAX_VCPUS;
break;
case KVM_CAP_MAX_VCPU_ID:
- r = KVM_MAX_VCPU_ID;
+ r = KVM_MAX_VCPU_IDS;
break;
case KVM_CAP_PV_MMU: /* obsolete */
r = 0;
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 041ca7f15ea4..d2b405170f6e 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -39,8 +39,8 @@
#include <asm/kvm_host.h>
#include <linux/kvm_dirty_ring.h>

-#ifndef KVM_MAX_VCPU_ID
-#define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
+#ifndef KVM_MAX_VCPU_IDS
+#define KVM_MAX_VCPU_IDS KVM_MAX_VCPUS
#endif

/*
diff --git a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
index 0299cd81b8ba..f968dfd4ee88 100644
--- a/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
+++ b/tools/testing/selftests/kvm/kvm_create_max_vcpus.c
@@ -53,7 +53,7 @@ int main(int argc, char *argv[])
kvm_max_vcpu_id = kvm_max_vcpus;

TEST_ASSERT(kvm_max_vcpu_id >= kvm_max_vcpus,
- "KVM_MAX_VCPU_ID (%d) must be at least as large as KVM_MAX_VCPUS (%d).",
+ "KVM_MAX_VCPU_IDS (%d) must be at least as large as KVM_MAX_VCPUS (%d).",
kvm_max_vcpu_id, kvm_max_vcpus);

test_vcpu_creation(0, kvm_max_vcpus);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 439d3b4cd1a9..62fcbc897e1c 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3557,7 +3557,7 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id)
struct kvm_vcpu *vcpu;
struct page *page;

- if (id >= KVM_MAX_VCPU_ID)
+ if (id >= KVM_MAX_VCPU_IDS)
return -EINVAL;

mutex_lock(&kvm->lock);
--
2.26.2