Commit 2ea7afb6 authored by Janosch Frank's avatar Janosch Frank
Browse files

s390x: Ultravisor guest API test



Test the error conditions of guest 2 Ultravisor calls, namely:
     * Query Ultravisor information
     * Set shared access
     * Remove shared access

Signed-off-by: default avatarJanosch Frank <frankja@linux.ibm.com>
Reviewed-by: default avatarClaudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: default avatarThomas Huth <thuth@redhat.com>
Acked-by: default avatarCornelia Huck <cohuck@redhat.com>
Message-Id: <20200810154541.32974-1-frankja@linux.ibm.com>
Signed-off-by: default avatarJanosch Frank <frankja@linux.ibm.com>
parent 787d1bcc
/*
* s390x Ultravisor related definitions
*
* Copyright (c) 2020 IBM Corp
*
* Authors:
* Janosch Frank <frankja@linux.ibm.com>
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2.
*/
#ifndef UV_H
#define UV_H
#define UVC_RC_EXECUTED 0x0001
#define UVC_RC_INV_CMD 0x0002
#define UVC_RC_INV_STATE 0x0003
#define UVC_RC_INV_LEN 0x0005
#define UVC_RC_NO_RESUME 0x0007
#define UVC_CMD_QUI 0x0001
#define UVC_CMD_SET_SHARED_ACCESS 0x1000
#define UVC_CMD_REMOVE_SHARED_ACCESS 0x1001
/* Bits in installed uv calls */
enum uv_cmds_inst {
BIT_UVC_CMD_QUI = 0,
BIT_UVC_CMD_SET_SHARED_ACCESS = 8,
BIT_UVC_CMD_REMOVE_SHARED_ACCESS = 9,
};
struct uv_cb_header {
u16 len;
u16 cmd; /* Command Code */
u16 rc; /* Response Code */
u16 rrc; /* Return Reason Code */
} __attribute__((packed)) __attribute__((aligned(8)));
struct uv_cb_qui {
struct uv_cb_header header;
u64 reserved08;
u64 inst_calls_list[4];
u64 reserved30[15];
} __attribute__((packed)) __attribute__((aligned(8)));
struct uv_cb_share {
struct uv_cb_header header;
u64 reserved08[3];
u64 paddr;
u64 reserved28;
} __attribute__((packed)) __attribute__((aligned(8)));
static inline int uv_call(unsigned long r1, unsigned long r2)
{
int cc;
/*
* The brc instruction will take care of the cc 2/3 case where
* we need to continue the execution because we were
* interrupted. The inline assembly will only return on
* success/error i.e. cc 0/1.
*/
asm volatile(
"0: .insn rrf,0xB9A40000,%[r1],%[r2],0,0\n"
" brc 3,0b\n"
" ipm %[cc]\n"
" srl %[cc],28\n"
: [cc] "=d" (cc)
: [r1] "a" (r1), [r2] "a" (r2)
: "memory", "cc");
return cc;
}
#endif
......@@ -18,6 +18,7 @@ tests += $(TEST_DIR)/skrf.elf
tests += $(TEST_DIR)/smp.elf
tests += $(TEST_DIR)/sclp.elf
tests += $(TEST_DIR)/css.elf
tests += $(TEST_DIR)/uv-guest.elf
tests_binary = $(patsubst %.elf,%.bin,$(tests))
all: directories test_cases test_cases_binary
......
......@@ -92,3 +92,6 @@ extra_params = -device virtio-net-ccw
[skrf]
file = skrf.elf
smp = 2
[uv-guest]
file = uv-guest.elf
/*
* Guest Ultravisor Call tests
*
* Copyright (c) 2020 IBM Corp
*
* Authors:
* Janosch Frank <frankja@linux.ibm.com>
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2.
*/
#include <libcflat.h>
#include <alloc_page.h>
#include <asm/page.h>
#include <asm/asm-offsets.h>
#include <asm/interrupt.h>
#include <asm/facility.h>
#include <asm/uv.h>
static unsigned long page;
static void test_priv(void)
{
struct uv_cb_header uvcb = {};
report_prefix_push("privileged");
report_prefix_push("query");
uvcb.cmd = UVC_CMD_QUI;
uvcb.len = sizeof(struct uv_cb_qui);
expect_pgm_int();
enter_pstate();
uv_call(0, (u64)&uvcb);
check_pgm_int_code(PGM_INT_CODE_PRIVILEGED_OPERATION);
report_prefix_pop();
report_prefix_push("share");
uvcb.cmd = UVC_CMD_SET_SHARED_ACCESS;
uvcb.len = sizeof(struct uv_cb_share);
expect_pgm_int();
enter_pstate();
uv_call(0, (u64)&uvcb);
check_pgm_int_code(PGM_INT_CODE_PRIVILEGED_OPERATION);
report_prefix_pop();
report_prefix_push("unshare");
uvcb.cmd = UVC_CMD_REMOVE_SHARED_ACCESS;
uvcb.len = sizeof(struct uv_cb_share);
expect_pgm_int();
enter_pstate();
uv_call(0, (u64)&uvcb);
check_pgm_int_code(PGM_INT_CODE_PRIVILEGED_OPERATION);
report_prefix_pop();
report_prefix_pop();
}
static void test_query(void)
{
struct uv_cb_qui uvcb = {
.header.cmd = UVC_CMD_QUI,
.header.len = sizeof(uvcb) - 8,
};
int cc;
report_prefix_push("query");
cc = uv_call(0, (u64)&uvcb);
report(cc == 1 && uvcb.header.rc == UVC_RC_INV_LEN, "length");
uvcb.header.len = sizeof(uvcb);
cc = uv_call(0, (u64)&uvcb);
report(cc == 0 && uvcb.header.rc == UVC_RC_EXECUTED, "successful query");
/*
* These bits have been introduced with the very first
* Ultravisor version and are expected to always be available
* because they are basic building blocks.
*/
report(uvcb.inst_calls_list[0] & (1UL << (63 - BIT_UVC_CMD_QUI)),
"query indicated");
report(uvcb.inst_calls_list[0] & (1UL << (63 - BIT_UVC_CMD_SET_SHARED_ACCESS)),
"share indicated");
report(uvcb.inst_calls_list[0] & (1UL << (63 - BIT_UVC_CMD_REMOVE_SHARED_ACCESS)),
"unshare indicated");
report_prefix_pop();
}
static void test_sharing(void)
{
struct uv_cb_share uvcb = {
.header.cmd = UVC_CMD_SET_SHARED_ACCESS,
.header.len = sizeof(uvcb) - 8,
.paddr = page,
};
int cc;
report_prefix_push("share");
cc = uv_call(0, (u64)&uvcb);
report(cc == 1 && uvcb.header.rc == UVC_RC_INV_LEN, "length");
uvcb.header.len = sizeof(uvcb);
cc = uv_call(0, (u64)&uvcb);
report(cc == 0 && uvcb.header.rc == UVC_RC_EXECUTED, "share");
report_prefix_pop();
report_prefix_push("unshare");
uvcb.header.cmd = UVC_CMD_REMOVE_SHARED_ACCESS;
uvcb.header.len -= 8;
cc = uv_call(0, (u64)&uvcb);
report(cc == 1 && uvcb.header.rc == UVC_RC_INV_LEN, "length");
uvcb.header.len = sizeof(uvcb);
cc = uv_call(0, (u64)&uvcb);
report(cc == 0 && uvcb.header.rc == UVC_RC_EXECUTED, "unshare");
report_prefix_pop();
report_prefix_pop();
}
static void test_invalid(void)
{
struct uv_cb_header uvcb = {
.len = 16,
.cmd = 0x4242,
};
int cc;
cc = uv_call(0, (u64)&uvcb);
report(cc == 1 && uvcb.rc == UVC_RC_INV_CMD, "invalid command");
}
int main(void)
{
bool has_uvc = test_facility(158);
report_prefix_push("uvc");
if (!has_uvc) {
report_skip("Ultravisor call facility is not available");
goto done;
}
page = (unsigned long)alloc_page();
test_priv();
test_invalid();
test_query();
test_sharing();
free_page((void *)page);
done:
report_prefix_pop();
return report_summary();
}
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