Commit f6d02aa2 authored by Reiji Watanabe's avatar Reiji Watanabe Committed by Marc Zyngier
Browse files

KVM: arm64: selftests: Add write_dbg{b,w}{c,v}r helpers in debug-exceptions 



Introduce helpers in the debug-exceptions test to write to
dbg{b,w}{c,v}r registers. Those helpers will be useful for
test cases that will be added to the test in subsequent patches.

No functional change intended.

Signed-off-by: default avatarReiji Watanabe <reijiw@google.com>
Reviewed-by: default avatarRicardo Koller <ricarkol@google.com>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221020054202.2119018-3-reijiw@google.com
parent 1a618203

tools/testing/selftests/kvm/aarch64/debug-exceptions.c

+68 −4
Original line number Diff line number Diff line
@@ -30,6 +30,69 @@ static volatile uint64_t svc_addr; 
static volatile uint64_t ss_addr[4], ss_idx;

#define  PC(v)  ((uint64_t)&(v))



#define GEN_DEBUG_WRITE_REG(reg_name)			\

static void write_##reg_name(int num, uint64_t val)	\

{							\

	switch (num) {					\

	case 0:						\

		write_sysreg(val, reg_name##0_el1);	\

		break;					\

	case 1:						\

		write_sysreg(val, reg_name##1_el1);	\

		break;					\

	case 2:						\

		write_sysreg(val, reg_name##2_el1);	\

		break;					\

	case 3:						\

		write_sysreg(val, reg_name##3_el1);	\

		break;					\

	case 4:						\

		write_sysreg(val, reg_name##4_el1);	\

		break;					\

	case 5:						\

		write_sysreg(val, reg_name##5_el1);	\

		break;					\

	case 6:						\

		write_sysreg(val, reg_name##6_el1);	\

		break;					\

	case 7:						\

		write_sysreg(val, reg_name##7_el1);	\

		break;					\

	case 8:						\

		write_sysreg(val, reg_name##8_el1);	\

		break;					\

	case 9:						\

		write_sysreg(val, reg_name##9_el1);	\

		break;					\

	case 10:					\

		write_sysreg(val, reg_name##10_el1);	\

		break;					\

	case 11:					\

		write_sysreg(val, reg_name##11_el1);	\

		break;					\

	case 12:					\

		write_sysreg(val, reg_name##12_el1);	\

		break;					\

	case 13:					\

		write_sysreg(val, reg_name##13_el1);	\

		break;					\

	case 14:					\

		write_sysreg(val, reg_name##14_el1);	\

		break;					\

	case 15:					\

		write_sysreg(val, reg_name##15_el1);	\

		break;					\

	default:					\

		GUEST_ASSERT(0);			\

	}						\

}



/* Define write_dbgbcr()/write_dbgbvr()/write_dbgwcr()/write_dbgwvr() */

GEN_DEBUG_WRITE_REG(dbgbcr)

GEN_DEBUG_WRITE_REG(dbgbvr)

GEN_DEBUG_WRITE_REG(dbgwcr)

GEN_DEBUG_WRITE_REG(dbgwvr)



static void reset_debug_state(void)

{

	asm volatile("msr daifset, #8");
@@ -61,8 +124,9 @@ static void install_wp(uint64_t addr) 
	uint32_t mdscr;



	wcr = DBGWCR_LEN8 | DBGWCR_RD | DBGWCR_WR | DBGWCR_EL1 | DBGWCR_E;

	write_sysreg(wcr, dbgwcr0_el1);

	write_sysreg(addr, dbgwvr0_el1);

	write_dbgwcr(0, wcr);

	write_dbgwvr(0, addr);



	isb();



	asm volatile("msr daifclr, #8");
@@ -78,8 +142,8 @@ static void install_hw_bp(uint64_t addr) 
	uint32_t mdscr;



	bcr = DBGBCR_LEN8 | DBGBCR_EXEC | DBGBCR_EL1 | DBGBCR_E;

	write_sysreg(bcr, dbgbcr0_el1);

	write_sysreg(addr, dbgbvr0_el1);

	write_dbgbcr(0, bcr);

	write_dbgbvr(0, addr);

	isb();



	asm volatile("msr daifclr, #8");