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[PATCH v6 57/66] accel/tcg: Report unaligned atomics for user-only
From: |
Richard Henderson |
Subject: |
[PATCH v6 57/66] accel/tcg: Report unaligned atomics for user-only |
Date: |
Sat, 30 Oct 2021 10:16:26 -0700 |
Use the new cpu_loop_exit_sigbus for atomic_mmu_lookup, which
has access to complete alignment info from the TCGMemOpIdx arg.
Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
accel/tcg/user-exec.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c
index c4f69908e9..1ee64f01fc 100644
--- a/accel/tcg/user-exec.c
+++ b/accel/tcg/user-exec.c
@@ -474,11 +474,22 @@ static void *atomic_mmu_lookup(CPUArchState *env,
target_ulong addr,
MemOpIdx oi, int size, int prot,
uintptr_t retaddr)
{
+ MemOp mop = get_memop(oi);
+ int a_bits = get_alignment_bits(mop);
+ void *ret;
+
+ /* Enforce guest required alignment. */
+ if (unlikely(addr & ((1 << a_bits) - 1))) {
+ MMUAccessType t = prot == PAGE_READ ? MMU_DATA_LOAD : MMU_DATA_STORE;
+ cpu_loop_exit_sigbus(env_cpu(env), addr, t, retaddr);
+ }
+
/* Enforce qemu required alignment. */
if (unlikely(addr & (size - 1))) {
cpu_loop_exit_atomic(env_cpu(env), retaddr);
}
- void *ret = g2h(env_cpu(env), addr);
+
+ ret = g2h(env_cpu(env), addr);
set_helper_retaddr(retaddr);
return ret;
}
--
2.25.1
- [PATCH v6 40/66] target/xtensa: Make xtensa_cpu_tlb_fill sysemu only, (continued)
- [PATCH v6 40/66] target/xtensa: Make xtensa_cpu_tlb_fill sysemu only, Richard Henderson, 2021/10/30
- [PATCH v6 52/66] target/s390x: Implement s390x_cpu_record_sigbus, Richard Henderson, 2021/10/30
- [PATCH v6 44/66] target/alpha: Implement alpha_cpu_record_sigbus, Richard Henderson, 2021/10/30
- [PATCH v6 46/66] linux-user/hppa: Remove EXCP_UNALIGN handling, Richard Henderson, 2021/10/30
- [PATCH v6 51/66] linux-user/ppc: Remove POWERPC_EXCP_ALIGN handling, Richard Henderson, 2021/10/30
- [PATCH v6 42/66] hw/core: Add TCGCPUOps.record_sigbus, Richard Henderson, 2021/10/30
- [PATCH v6 43/66] linux-user: Add cpu_loop_exit_sigbus, Richard Henderson, 2021/10/30
- [PATCH v6 50/66] target/ppc: Restrict ppc_cpu_do_unaligned_access to sysemu, Richard Henderson, 2021/10/30
- [PATCH v6 49/66] target/ppc: Set fault address in ppc_cpu_do_unaligned_access, Richard Henderson, 2021/10/30
- [PATCH v6 59/66] tcg: Add helper_unaligned_{ld, st} for user-only sigbus, Richard Henderson, 2021/10/30
- [PATCH v6 57/66] accel/tcg: Report unaligned atomics for user-only,
Richard Henderson <=
- [PATCH v6 60/66] linux-user: Handle BUS_ADRALN in host_signal_handler, Richard Henderson, 2021/10/30
- [PATCH v6 56/66] target/sparc: Set fault address in sparc_cpu_do_unaligned_access, Richard Henderson, 2021/10/30
- [PATCH v6 62/66] linux-user: Disable more prctl subcodes, Richard Henderson, 2021/10/30
- [PATCH v6 54/66] target/sparc: Remove DEBUG_UNALIGNED, Richard Henderson, 2021/10/30
- [PATCH v6 53/66] target/sh4: Set fault address in superh_cpu_do_unaligned_access, Richard Henderson, 2021/10/30
- [PATCH v6 65/66] target/hppa: Implement prctl_unalign_sigbus, Richard Henderson, 2021/10/30
- [PATCH v6 48/66] target/ppc: Move SPR_DSISR setting to powerpc_excp, Richard Henderson, 2021/10/30
- [PATCH v6 58/66] accel/tcg: Report unaligned load/store for user-only, Richard Henderson, 2021/10/30
- [PATCH v6 63/66] linux-user: Add code for PR_GET/SET_UNALIGN, Richard Henderson, 2021/10/30
- [PATCH v6 47/66] target/microblaze: Do not set MO_ALIGN for user-only, Richard Henderson, 2021/10/30