| Vasily Gorbik | 5abb935 | 2019-04-01 19:11:03 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | #include <asm/uv.h> |
| 3 | #include <asm/facility.h> |
| 4 | #include <asm/sections.h> |
| 5 | |
| 6 | int __bootdata_preserved(prot_virt_guest); |
| 7 | |
| 8 | void uv_query_info(void) |
| 9 | { |
| 10 | struct uv_cb_qui uvcb = { |
| 11 | .header.cmd = UVC_CMD_QUI, |
| 12 | .header.len = sizeof(uvcb) |
| 13 | }; |
| 14 | |
| 15 | if (!test_facility(158)) |
| 16 | return; |
| 17 | |
| Christian Borntraeger | 27dc070 | 2020-02-10 11:27:37 -0500 | [diff] [blame^] | 18 | /* rc==0x100 means that there is additional data we do not process */ |
| 19 | if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100) |
| Vasily Gorbik | 5abb935 | 2019-04-01 19:11:03 +0200 | [diff] [blame] | 20 | return; |
| 21 | |
| 22 | if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) && |
| 23 | test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list)) |
| 24 | prot_virt_guest = 1; |
| 25 | } |