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KVM: arm64: selftests: Add helpers to enable debug exceptions

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Add helpers to enable breakpoint and watchpoint exceptions.
No functional change intended.

Signed-off-by: Reiji Watanabe <reijiw@google.com>
Reviewed-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221020054202.2119018-5-reijiw@google.com
This commit is contained in:
Reiji Watanabe
2022-10-19 22:41:57 -07:00
committed by Marc Zyngier
parent 700b8860e0
commit 152880d8ed
1 changed files with 15 additions and 14 deletions
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29
tools/testing/selftests/kvm/aarch64/debug-exceptions.c
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@@ -130,17 +130,10 @@ static void enable_os_lock(void)
GUEST_ASSERT(read_sysreg(oslsr_el1) & 2);
}
static void install_wp(uint8_t wpn, uint64_t addr)
static void enable_monitor_debug_exceptions(void)
{
uint32_t wcr;
uint32_t mdscr;
wcr = DBGWCR_LEN8 | DBGWCR_RD | DBGWCR_WR | DBGWCR_EL1 | DBGWCR_E;
write_dbgwcr(wpn, wcr);
write_dbgwvr(wpn, addr);
isb();
asm volatile("msr daifclr, #8");
mdscr = read_sysreg(mdscr_el1) | MDSCR_KDE | MDSCR_MDE;
@@ -148,21 +141,29 @@ static void install_wp(uint8_t wpn, uint64_t addr)
isb();
}
static void install_wp(uint8_t wpn, uint64_t addr)
{
uint32_t wcr;
wcr = DBGWCR_LEN8 | DBGWCR_RD | DBGWCR_WR | DBGWCR_EL1 | DBGWCR_E;
write_dbgwcr(wpn, wcr);
write_dbgwvr(wpn, addr);
isb();
enable_monitor_debug_exceptions();
}
static void install_hw_bp(uint8_t bpn, uint64_t addr)
{
uint32_t bcr;
uint32_t mdscr;
bcr = DBGBCR_LEN8 | DBGBCR_EXEC | DBGBCR_EL1 | DBGBCR_E;
write_dbgbcr(bpn, bcr);
write_dbgbvr(bpn, addr);
isb();
asm volatile("msr daifclr, #8");
mdscr = read_sysreg(mdscr_el1) | MDSCR_KDE | MDSCR_MDE;
write_sysreg(mdscr, mdscr_el1);
isb();
enable_monitor_debug_exceptions();
}
static void install_ss(void)