From: Steffen Eiden <seiden@linux.ibm.com>
To: kvm@vger.kernel.org, linux-s390@vger.kernel.org,
linux-kernel@vger.kernel.org,
Viktor Mihajlovski <mihajlov@linux.ibm.com>
Cc: Janosch Frank <frankja@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Nico Boehr <nrb@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Heiko Carstens <hca@linux.ibm.com>,
Hendrik Brueckner <brueckner@linux.ibm.com>
Subject: [PATCH v3 5/6] s390/uv: replace scnprintf with sysfs_emit
Date: Tue, 6 Jun 2023 13:37:35 +0200 [thread overview]
Message-ID: <20230606113736.2934503-6-seiden@linux.ibm.com> (raw)
In-Reply-To: <20230606113736.2934503-1-seiden@linux.ibm.com>
Replace scnprintf(page, PAGE_SIZE, ...) with the page size aware
sysfs_emit(buf, ...) which adds some sanity checks.
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
---
arch/s390/kernel/uv.c | 54 +++++++++++++++++++------------------------
1 file changed, 24 insertions(+), 30 deletions(-)
diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c
index cb2ee06df286..cd3a591edab3 100644
--- a/arch/s390/kernel/uv.c
+++ b/arch/s390/kernel/uv.c
@@ -460,13 +460,13 @@ 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 =
@@ -491,30 +491,27 @@ 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 =
@@ -530,48 +527,45 @@ 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 =
@@ -605,7 +599,7 @@ static ssize_t uv_is_prot_virt_guest(struct kobject *kobj,
#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
val = prot_virt_guest;
#endif
- return scnprintf(page, PAGE_SIZE, "%d\n", val);
+ return sysfs_emit(page, "%d\n", val);
}
static ssize_t uv_is_prot_virt_host(struct kobject *kobj,
@@ -617,7 +611,7 @@ 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(page, "%d\n", val);
}
static struct kobj_attribute uv_prot_virt_guest =
--
2.40.1
next prev parent reply other threads:[~2023-06-06 11:38 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-06 11:37 [PATCH v3 0/6] s390/uvdevice: Expose secret UVCs Steffen Eiden
2023-06-06 11:37 ` [PATCH v3 1/6] s390/uvdevice: Add info IOCTL Steffen Eiden
2023-06-06 13:33 ` Janosch Frank
2023-06-06 11:37 ` [PATCH v3 2/6] s390/uvdevice: Add 'Add Secret' UVC Steffen Eiden
2023-06-06 14:18 ` Janosch Frank
2023-06-06 11:37 ` [PATCH v3 3/6] s390/uvdevice: Add 'List Secrets' UVC Steffen Eiden
2023-06-06 11:37 ` [PATCH v3 4/6] s390/uvdevice: Add 'Lock Secret Store' UVC Steffen Eiden
2023-06-06 15:24 ` Janosch Frank
2023-06-06 11:37 ` Steffen Eiden [this message]
2023-06-06 13:50 ` [PATCH v3 5/6] s390/uv: replace scnprintf with sysfs_emit Janosch Frank
2023-06-06 11:37 ` [PATCH v3 6/6] s390/uv: Update query for secret-UVCs Steffen Eiden
2023-06-06 15:23 ` Janosch Frank
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