From: Andrew Jones <drjones@redhat.com>
To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu
Cc: pbonzini@redhat.com
Subject: [PATCH kvm-unit-tests 2/3] arm/arm64: selftest: Allow test_exception clobber list to be extended
Date: Mon, 13 Jan 2020 14:00:42 +0100 [thread overview]
Message-ID: <20200113130043.30851-3-drjones@redhat.com> (raw)
In-Reply-To: <20200113130043.30851-1-drjones@redhat.com>
test_exception() callers may need to extend the clobber list. Also
there's no reason for the callers to need to assume that R0 and R1
are already in the list.
Signed-off-by: Andrew Jones <drjones@redhat.com>
---
arm/selftest.c | 105 ++++++++++++++++++++++++-------------------------
1 file changed, 51 insertions(+), 54 deletions(-)
diff --git a/arm/selftest.c b/arm/selftest.c
index 89759cf9f592..6d74fa1fa4c4 100644
--- a/arm/selftest.c
+++ b/arm/selftest.c
@@ -74,24 +74,22 @@ static bool svc_works;
* that causes an exception. The test handler will check that its
* capture of the current register state matches the capture done
* here.
- *
- * NOTE: update clobber list if passed insns needs more than r0,r1
*/
-#define test_exception(pre_insns, excptn_insn, post_insns) \
- asm volatile( \
- pre_insns "\n" \
- "mov r0, %0\n" \
- "stmia r0, { r0-lr }\n" \
- "mrs r1, cpsr\n" \
- "str r1, [r0, #" xstr(S_PSR) "]\n" \
- "mov r1, #-1\n" \
- "str r1, [r0, #" xstr(S_OLD_R0) "]\n" \
- "add r1, pc, #8\n" \
- "str r1, [r0, #" xstr(S_R1) "]\n" \
- "str r1, [r0, #" xstr(S_PC) "]\n" \
- excptn_insn "\n" \
- post_insns "\n" \
- :: "r" (&expected_regs) : "r0", "r1")
+#define test_exception(pre_insns, excptn_insn, post_insns, clobbers...) \
+ asm volatile( \
+ pre_insns "\n" \
+ "mov r0, %0\n" \
+ "stmia r0, { r0-lr }\n" \
+ "mrs r1, cpsr\n" \
+ "str r1, [r0, #" xstr(S_PSR) "]\n" \
+ "mov r1, #-1\n" \
+ "str r1, [r0, #" xstr(S_OLD_R0) "]\n" \
+ "add r1, pc, #8\n" \
+ "str r1, [r0, #" xstr(S_R1) "]\n" \
+ "str r1, [r0, #" xstr(S_PC) "]\n" \
+ excptn_insn "\n" \
+ post_insns "\n" \
+ :: "r" (&expected_regs) : "r0", "r1", ##clobbers)
static bool check_regs(struct pt_regs *regs)
{
@@ -119,7 +117,7 @@ static bool check_und(void)
install_exception_handler(EXCPTN_UND, und_handler);
/* issue an instruction to a coprocessor we don't have */
- test_exception("", "mcr p2, 0, r0, c0, c0", "");
+ test_exception("", "mcr p2, 0, r0, c0, c0", "", "r0");
install_exception_handler(EXCPTN_UND, NULL);
@@ -156,7 +154,8 @@ static bool check_svc(void)
"push { r0,lr }\n",
"svc #123\n",
"pop { r0,lr }\n"
- "msr spsr_cxsf, r0\n"
+ "msr spsr_cxsf, r0\n",
+ "r0", "lr"
);
} else {
test_exception("", "svc #123", "");
@@ -178,41 +177,39 @@ static void user_psci_system_off(struct pt_regs *regs)
* that causes an exception. The test handler will check that its
* capture of the current register state matches the capture done
* here.
- *
- * NOTE: update clobber list if passed insns needs more than x0,x1
*/
-#define test_exception(pre_insns, excptn_insn, post_insns) \
- asm volatile( \
- pre_insns "\n" \
- "mov x1, %0\n" \
- "ldr x0, [x1, #" xstr(S_PSTATE) "]\n" \
- "mrs x1, nzcv\n" \
- "orr w0, w0, w1\n" \
- "mov x1, %0\n" \
- "str w0, [x1, #" xstr(S_PSTATE) "]\n" \
- "mov x0, sp\n" \
- "str x0, [x1, #" xstr(S_SP) "]\n" \
- "adr x0, 1f\n" \
- "str x0, [x1, #" xstr(S_PC) "]\n" \
- "stp x2, x3, [x1, #16]\n" \
- "stp x4, x5, [x1, #32]\n" \
- "stp x6, x7, [x1, #48]\n" \
- "stp x8, x9, [x1, #64]\n" \
- "stp x10, x11, [x1, #80]\n" \
- "stp x12, x13, [x1, #96]\n" \
- "stp x14, x15, [x1, #112]\n" \
- "stp x16, x17, [x1, #128]\n" \
- "stp x18, x19, [x1, #144]\n" \
- "stp x20, x21, [x1, #160]\n" \
- "stp x22, x23, [x1, #176]\n" \
- "stp x24, x25, [x1, #192]\n" \
- "stp x26, x27, [x1, #208]\n" \
- "stp x28, x29, [x1, #224]\n" \
- "str x30, [x1, #" xstr(S_LR) "]\n" \
- "stp x0, x1, [x1]\n" \
- "1:" excptn_insn "\n" \
- post_insns "\n" \
- :: "r" (&expected_regs) : "x0", "x1")
+#define test_exception(pre_insns, excptn_insn, post_insns, clobbers...) \
+ asm volatile( \
+ pre_insns "\n" \
+ "mov x1, %0\n" \
+ "ldr x0, [x1, #" xstr(S_PSTATE) "]\n" \
+ "mrs x1, nzcv\n" \
+ "orr w0, w0, w1\n" \
+ "mov x1, %0\n" \
+ "str w0, [x1, #" xstr(S_PSTATE) "]\n" \
+ "mov x0, sp\n" \
+ "str x0, [x1, #" xstr(S_SP) "]\n" \
+ "adr x0, 1f\n" \
+ "str x0, [x1, #" xstr(S_PC) "]\n" \
+ "stp x2, x3, [x1, #16]\n" \
+ "stp x4, x5, [x1, #32]\n" \
+ "stp x6, x7, [x1, #48]\n" \
+ "stp x8, x9, [x1, #64]\n" \
+ "stp x10, x11, [x1, #80]\n" \
+ "stp x12, x13, [x1, #96]\n" \
+ "stp x14, x15, [x1, #112]\n" \
+ "stp x16, x17, [x1, #128]\n" \
+ "stp x18, x19, [x1, #144]\n" \
+ "stp x20, x21, [x1, #160]\n" \
+ "stp x22, x23, [x1, #176]\n" \
+ "stp x24, x25, [x1, #192]\n" \
+ "stp x26, x27, [x1, #208]\n" \
+ "stp x28, x29, [x1, #224]\n" \
+ "str x30, [x1, #" xstr(S_LR) "]\n" \
+ "stp x0, x1, [x1]\n" \
+ "1:" excptn_insn "\n" \
+ post_insns "\n" \
+ :: "r" (&expected_regs) : "x0", "x1", ##clobbers)
static bool check_regs(struct pt_regs *regs)
{
@@ -260,7 +257,7 @@ static bool check_und(void)
install_exception_handler(v, ESR_EL1_EC_UNKNOWN, unknown_handler);
/* try to read an el2 sysreg from el0/1 */
- test_exception("", "mrs x0, sctlr_el2", "");
+ test_exception("", "mrs x0, sctlr_el2", "", "x0");
install_exception_handler(v, ESR_EL1_EC_UNKNOWN, NULL);
--
2.21.1
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next prev parent reply other threads:[~2020-01-13 13:01 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-13 13:00 [PATCH kvm-unit-tests 0/3] arm/arm64: selftest for pabt Andrew Jones
2020-01-13 13:00 ` [PATCH kvm-unit-tests 1/3] arm/arm64: Improve memory region management Andrew Jones
2020-01-13 13:00 ` Andrew Jones [this message]
2020-01-13 13:00 ` [PATCH kvm-unit-tests 3/3] arm/arm64: selftest: Add prefetch abort test Andrew Jones
2020-01-21 12:24 ` [PATCH kvm-unit-tests 0/3] arm/arm64: selftest for pabt Paolo Bonzini
2020-01-21 12:47 ` Andrew Jones
2020-01-21 13:17 [PULL kvm-unit-tests 0/3] arm/arm64: Add prefetch abort test Andrew Jones
2020-01-21 13:17 ` [PATCH kvm-unit-tests 2/3] arm/arm64: selftest: Allow test_exception clobber list to be extended Andrew Jones
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