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| author | Alexander Graf | 2021-10-26 09:12:41 +0200 |
|---|---|---|
| committer | Richard Henderson | 2021-11-02 19:18:33 +0100 |
| commit | 5fd6a3e23669444026f84f466a7ed402c203a84e (patch) | |
| tree | 4d4810d8916ceb6e6b459830403f06bbcd796f19 | |
| parent | hw/arm/virt: Rename default_bus_bypass_iommu (diff) | |
| download | qemu-5fd6a3e23669444026f84f466a7ed402c203a84e.tar.gz qemu-5fd6a3e23669444026f84f466a7ed402c203a84e.tar.xz qemu-5fd6a3e23669444026f84f466a7ed402c203a84e.zip | |
hvf: arm: Ignore cache operations on MMIO
Apple's Hypervisor.Framework forwards cache operations as MMIO traps
into user space. For MMIO however, these have no meaning: There is no
cache attached to them.
So let's just treat cache data exits as nops.
This fixes OpenBSD booting as guest.
Reported-by: AJ Barris <AwlsomeAlex@github.com>
Signed-off-by: Alexander Graf <agraf@csgraf.de>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Mark Kettenis <kettenis@openbsd.org>
Reference: https://github.com/utmapp/UTM/issues/3197
Message-Id: <20211026071241.74889-1-agraf@csgraf.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
| -rw-r--r-- | target/arm/hvf/hvf.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c index bff3e0cde7..0dc96560d3 100644 --- a/target/arm/hvf/hvf.c +++ b/target/arm/hvf/hvf.c @@ -1150,12 +1150,19 @@ int hvf_vcpu_exec(CPUState *cpu) uint32_t sas = (syndrome >> 22) & 3; uint32_t len = 1 << sas; uint32_t srt = (syndrome >> 16) & 0x1f; + uint32_t cm = (syndrome >> 8) & 0x1; uint64_t val = 0; trace_hvf_data_abort(env->pc, hvf_exit->exception.virtual_address, hvf_exit->exception.physical_address, isv, iswrite, s1ptw, len, srt); + if (cm) { + /* We don't cache MMIO regions */ + advance_pc = true; + break; + } + assert(isv); if (iswrite) { |