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KVM: s390: selftest: Test suppression indication on key prot exception

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Check that suppression is not indicated on injection of a key checked
protection exception caused by a memop after it already modified guest
memory, as that violates the definition of suppression.

Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Link: https://lore.kernel.org/r/20220512131019.2594948-3-scgl@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
This commit is contained in:
Janis Schoetterl-Glausch 2022-05-12 15:10:18 +02:00 committed by Janosch Frank
parent c783631b0b
commit c71159648c
1 changed files with 45 additions and 1 deletions
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46
tools/testing/selftests/kvm/s390x/memop.c
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@ -10,6 +10,8 @@
#include <string.h>
#include <sys/ioctl.h>
#include <linux/bits.h>
#include "test_util.h"
#include "kvm_util.h"
@ -194,6 +196,7 @@ static int err_memop_ioctl(struct test_vcpu vcpu, struct kvm_s390_mem_op *ksmo)
#define SIDA_OFFSET(o) ._sida_offset = 1, .sida_offset = (o)
#define AR(a) ._ar = 1, .ar = (a)
#define KEY(a) .f_key = 1, .key = (a)
#define INJECT .f_inject = 1
#define CHECK_N_DO(f, ...) ({ f(__VA_ARGS__, CHECK_ONLY); f(__VA_ARGS__); })
@ -430,9 +433,18 @@ static void test_copy_key_fetch_prot(void)
TEST_ASSERT(rv == 4, "Should result in protection exception"); \
})
static void guest_error_key(void)
{
GUEST_SYNC(STAGE_INITED);
set_storage_key_range(mem1, PAGE_SIZE, 0x18);
set_storage_key_range(mem1 + PAGE_SIZE, sizeof(mem1) - PAGE_SIZE, 0x98);
GUEST_SYNC(STAGE_SKEYS_SET);
GUEST_SYNC(STAGE_IDLED);
}
static void test_errors_key(void)
{
struct test_default t = test_default_init(guest_copy_key_fetch_prot);
struct test_default t = test_default_init(guest_error_key);
HOST_SYNC(t.vcpu, STAGE_INITED);
HOST_SYNC(t.vcpu, STAGE_SKEYS_SET);
@ -446,6 +458,37 @@ static void test_errors_key(void)
kvm_vm_free(t.kvm_vm);
}
static void test_termination(void)
{
struct test_default t = test_default_init(guest_error_key);
uint64_t prefix;
uint64_t teid;
uint64_t teid_mask = BIT(63 - 56) | BIT(63 - 60) | BIT(63 - 61);
uint64_t psw[2];
HOST_SYNC(t.vcpu, STAGE_INITED);
HOST_SYNC(t.vcpu, STAGE_SKEYS_SET);
/* vcpu, mismatching keys after first page */
ERR_PROT_MOP(t.vcpu, LOGICAL, WRITE, mem1, t.size, GADDR_V(mem1), KEY(1), INJECT);
/*
* The memop injected a program exception and the test needs to check the
* Translation-Exception Identification (TEID). It is necessary to run
* the guest in order to be able to read the TEID from guest memory.
* Set the guest program new PSW, so the guest state is not clobbered.
*/
prefix = t.run->s.regs.prefix;
psw[0] = t.run->psw_mask;
psw[1] = t.run->psw_addr;
MOP(t.vm, ABSOLUTE, WRITE, psw, sizeof(psw), GADDR(prefix + 464));
HOST_SYNC(t.vcpu, STAGE_IDLED);
MOP(t.vm, ABSOLUTE, READ, &teid, sizeof(teid), GADDR(prefix + 168));
/* Bits 56, 60, 61 form a code, 0 being the only one allowing for termination */
ASSERT_EQ(teid & teid_mask, 0);
kvm_vm_free(t.kvm_vm);
}
static void test_errors_key_storage_prot_override(void)
{
struct test_default t = test_default_init(guest_copy_key_fetch_prot);
@ -668,6 +711,7 @@ int main(int argc, char *argv[])
test_copy_key_fetch_prot();
test_copy_key_fetch_prot_override();
test_errors_key();
test_termination();
test_errors_key_storage_prot_override();
test_errors_key_fetch_prot_override_not_enabled();
test_errors_key_fetch_prot_override_enabled();