Currently, the debug-exceptions test doesn't have a test case for
a linked watchpoint. Add a test case for the linked watchpoint to
the test.
Signed-off-by: Reiji Watanabe <reijiw@xxxxxxxxxx>
---
.../selftests/kvm/aarch64/debug-exceptions.c | 35 +++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/tools/testing/selftests/kvm/aarch64/debug-exceptions.c b/tools/testing/selftests/kvm/aarch64/debug-exceptions.c
index 9fccfeebccd3..dc94c85bb383 100644
--- a/tools/testing/selftests/kvm/aarch64/debug-exceptions.c
+++ b/tools/testing/selftests/kvm/aarch64/debug-exceptions.c
@@ -21,6 +21,9 @@
#define DBGWCR_WR (0x2 << 3)
#define DBGWCR_EL1 (0x1 << 1)
#define DBGWCR_E (0x1 << 0)
+#define DBGWCR_LBN_SHIFT 16
+#define DBGWCR_WT_SHIFT 20
+#define DBGWCR_WT_LINK (0x1 << DBGWCR_WT_SHIFT)
#define SPSR_D (1 << 9)
#define SPSR_SS (1 << 21)
@@ -169,6 +172,28 @@ static void install_hw_bp(uint8_t bpn, uint64_t addr)
enable_debug_bwp_exception();
}
+static void install_wp_ctx(uint8_t addr_wp, uint8_t ctx_bp, uint64_t addr,
+ uint64_t ctx)
+{
+ uint32_t wcr;
+ uint64_t ctx_bcr;
+
+ /* Setup a context-aware breakpoint */
+ ctx_bcr = DBGBCR_LEN8 | DBGBCR_EXEC | DBGBCR_EL1 | DBGBCR_E |
+ DBGBCR_BT_CTX_LINK;
+ write_dbgbcr(ctx_bp, ctx_bcr);
+ write_dbgbvr(ctx_bp, ctx);
+
+ /* Setup a linked watchpoint (linked to the context-aware breakpoint) */
+ wcr = DBGWCR_LEN8 | DBGWCR_RD | DBGWCR_WR | DBGWCR_EL1 | DBGWCR_E |
+ DBGWCR_WT_LINK | ((uint32_t)ctx_bp << DBGWCR_LBN_SHIFT);
+ write_dbgwcr(addr_wp, wcr);
+ write_dbgwvr(addr_wp, addr);
+ isb();
+
+ enable_debug_bwp_exception();
+}
+
void install_hw_bp_ctx(uint8_t addr_bp, uint8_t ctx_bp, uint64_t addr,
uint64_t ctx)
{
@@ -323,6 +348,16 @@ static void guest_code(uint8_t bpn, uint8_t wpn, uint8_t ctx_bpn)
GUEST_SYNC(10);
+ /* Linked watchpoint */
+ reset_debug_state();
+ install_wp_ctx(wpn, ctx_bpn, PC(write_data), ctx);
+ /* Set context id */
+ write_sysreg(ctx, contextidr_el1);
+ isb();
+ write_data = 'x';
+ GUEST_ASSERT_EQ(write_data, 'x');
+ GUEST_ASSERT_EQ(wp_data_addr, PC(write_data));
+
GUEST_DONE();
}
--
2.37.1.595.g718a3a8f04-goog
