forked from Minki/linux
e82080e1f4
The number reported by the query is N-1 and I think people reading the
sysfs file would expect N instead. For users creating VMs there's no
actual difference because KVM's limit is currently below the UV's
limit.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Fixes: a0f60f8431 ("s390/protvirt: Add sysfs firmware interface for Ultravisor information")
Cc: stable@vger.kernel.org
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <asm/uv.h>
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#include <asm/facility.h>
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#include <asm/sections.h>
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/* will be used in arch/s390/kernel/uv.c */
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#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
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int __bootdata_preserved(prot_virt_guest);
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#endif
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#if IS_ENABLED(CONFIG_KVM)
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int __bootdata_preserved(prot_virt_host);
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#endif
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struct uv_info __bootdata_preserved(uv_info);
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void uv_query_info(void)
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{
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struct uv_cb_qui uvcb = {
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.header.cmd = UVC_CMD_QUI,
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.header.len = sizeof(uvcb)
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};
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if (!test_facility(158))
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return;
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/* rc==0x100 means that there is additional data we do not process */
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if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100)
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return;
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if (IS_ENABLED(CONFIG_KVM)) {
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memcpy(uv_info.inst_calls_list, uvcb.inst_calls_list, sizeof(uv_info.inst_calls_list));
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uv_info.uv_base_stor_len = uvcb.uv_base_stor_len;
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uv_info.guest_base_stor_len = uvcb.conf_base_phys_stor_len;
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uv_info.guest_virt_base_stor_len = uvcb.conf_base_virt_stor_len;
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uv_info.guest_virt_var_stor_len = uvcb.conf_virt_var_stor_len;
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uv_info.guest_cpu_stor_len = uvcb.cpu_stor_len;
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uv_info.max_sec_stor_addr = ALIGN(uvcb.max_guest_stor_addr, PAGE_SIZE);
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uv_info.max_num_sec_conf = uvcb.max_num_sec_conf;
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uv_info.max_guest_cpu_id = uvcb.max_guest_cpu_id;
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}
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#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
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if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) &&
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test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list))
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prot_virt_guest = 1;
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#endif
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}
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