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

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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: Reiji Watanabe <reijiw@google.com>
Reviewed-by: Ricardo Koller <ricarkol@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221020054202.2119018-3-reijiw@google.com
This commit is contained in:
Reiji Watanabe 2022-10-19 22:41:55 -07:00 committed by Marc Zyngier
parent 1a6182033f
commit f6d02aa28a
1 changed files with 68 additions and 4 deletions
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72
tools/testing/selftests/kvm/aarch64/debug-exceptions.c
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@ -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");