| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Release pages hypercall tests (DIAG 10) |
| * |
| * Copyright (c) 2018 IBM Corp |
| * |
| * Authors: |
| * Janosch Frank <frankja@linux.vnet.ibm.com> |
| */ |
| |
| #include <libcflat.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/interrupt.h> |
| #include <asm/page.h> |
| |
| static uint8_t pagebuf[PAGE_SIZE * 2] __attribute__((aligned(PAGE_SIZE * 2))); |
| const unsigned long page0 = (unsigned long)pagebuf; |
| const unsigned long page1 = (unsigned long)(pagebuf + PAGE_SIZE); |
| |
| /* Tells the host to release pages from guest real addresses start to |
| * end. Parameters have to be page aligned, instruction is privileged. |
| */ |
| static inline void diag10(unsigned long start, unsigned long end) |
| { |
| asm volatile ( |
| "diag %0,%1,0x10\n" |
| : : "a" (start), "a" (end)); |
| } |
| |
| /* Try freeing the prefix */ |
| static void test_prefix(void) |
| { |
| report_prefix_push("lowcore freeing"); |
| |
| report_prefix_push("0x0000/0x0000"); |
| expect_pgm_int(); |
| diag10(0, 0); |
| check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); |
| report_prefix_pop(); |
| |
| |
| report_prefix_push("0x1000/0x1000"); |
| expect_pgm_int(); |
| diag10(0x1000, 0x1000); |
| check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); |
| report_prefix_pop(); |
| |
| report_prefix_push("0x0000/0x1000"); |
| expect_pgm_int(); |
| diag10(0, 0x1000); |
| check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); |
| report_prefix_pop(); |
| |
| report_prefix_pop(); |
| } |
| |
| static void test_params(void) |
| { |
| report_prefix_push("start/end"); |
| |
| /* end < start */ |
| report_prefix_push("end < start"); |
| expect_pgm_int(); |
| diag10(page1, page0); |
| check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); |
| report_prefix_pop(); |
| |
| /* Unaligned start */ |
| report_prefix_push("unaligned start"); |
| expect_pgm_int(); |
| diag10((unsigned long) pagebuf + 42, page1); |
| check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); |
| report_prefix_pop(); |
| |
| /* Unaligned end */ |
| report_prefix_push("unaligned end"); |
| expect_pgm_int(); |
| diag10(page0, (unsigned long) pagebuf + PAGE_SIZE + 42); |
| check_pgm_int_code(PGM_INT_CODE_SPECIFICATION); |
| report_prefix_pop(); |
| |
| report_prefix_pop(); |
| } |
| |
| static void test_priv(void) |
| { |
| report_prefix_push("privileged"); |
| expect_pgm_int(); |
| enter_pstate(); |
| diag10(page0, page0); |
| check_pgm_int_code(PGM_INT_CODE_PRIVILEGED_OPERATION); |
| report_prefix_pop(); |
| } |
| |
| int main(void) |
| { |
| report_prefix_push("diag10"); |
| test_prefix(); |
| test_params(); |
| test_priv(); |
| return report_summary(); |
| } |