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[Stable-8.2.7,06/53] hvf: arm: Do not advance PC when raising an exception

Message ID 20240906065429.42415-6-mjt@tls.msk.ru (mailing list archive)
State New
Headers show
Series Patch Round-up for stable 8.2.7, freeze on 2024-09-16 | expand

Commit Message

Michael Tokarev Sept. 6, 2024, 6:53 a.m. UTC 
From: Akihiko Odaki <akihiko.odaki@daynix.com>

hvf did not advance PC when raising an exception for most unhandled
system registers, but it mistakenly advanced PC when raising an
exception for GICv3 registers.

Cc: qemu-stable@nongnu.org
Fixes: a2260983c655 ("hvf: arm: Add support for GICv3")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-id: 20240716-pmu-v3-4-8c7c1858a227@daynix.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit 30a1690f2402e6c1582d5b3ebcf7940bfe2fad4b)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
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Patch

diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 09b31c318a..d7cc00a084 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -1272,6 +1272,7 @@  static int hvf_sysreg_read(CPUState *cpu, uint32_t reg, uint32_t rt)
         /* Call the TCG sysreg handler. This is only safe for GICv3 regs. */
         if (!hvf_sysreg_read_cp(cpu, reg, &val)) {
             hvf_raise_exception(cpu, EXCP_UDEF, syn_uncategorized());
+            return 1;
         }
         break;
     case SYSREG_DBGBVR0_EL1: