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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
| commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
| tree | a94efe259b9009378be6d90eb30d2b019d95c194 /arch/s390/boot/uv.c | |
| parent | Initial commit. (diff) | |
| download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip | |
Adding upstream version 5.10.209.upstream/5.10.209
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/s390/boot/uv.c')
| -rw-r--r-- | arch/s390/boot/uv.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/s390/boot/uv.c b/arch/s390/boot/uv.c new file mode 100644 index 000000000..b3501ea50 --- /dev/null +++ b/arch/s390/boot/uv.c @@ -0,0 +1,47 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <asm/uv.h> +#include <asm/facility.h> +#include <asm/sections.h> + +/* will be used in arch/s390/kernel/uv.c */ +#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST +int __bootdata_preserved(prot_virt_guest); +#endif +#if IS_ENABLED(CONFIG_KVM) +int __bootdata_preserved(prot_virt_host); +#endif +struct uv_info __bootdata_preserved(uv_info); + +void uv_query_info(void) +{ + struct uv_cb_qui uvcb = { + .header.cmd = UVC_CMD_QUI, + .header.len = sizeof(uvcb) + }; + + if (!test_facility(158)) + return; + + /* rc==0x100 means that there is additional data we do not process */ + if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100) + return; + + if (IS_ENABLED(CONFIG_KVM)) { + memcpy(uv_info.inst_calls_list, uvcb.inst_calls_list, sizeof(uv_info.inst_calls_list)); + uv_info.uv_base_stor_len = uvcb.uv_base_stor_len; + uv_info.guest_base_stor_len = uvcb.conf_base_phys_stor_len; + uv_info.guest_virt_base_stor_len = uvcb.conf_base_virt_stor_len; + uv_info.guest_virt_var_stor_len = uvcb.conf_virt_var_stor_len; + uv_info.guest_cpu_stor_len = uvcb.cpu_stor_len; + uv_info.max_sec_stor_addr = ALIGN(uvcb.max_guest_stor_addr, PAGE_SIZE); + uv_info.max_num_sec_conf = uvcb.max_num_sec_conf; + uv_info.max_guest_cpu_id = uvcb.max_guest_cpu_id; + uv_info.uv_feature_indications = uvcb.uv_feature_indications; + } + +#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST + if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) && + test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list)) + prot_virt_guest = 1; +#endif +} |