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authorAlexander Graf2021-10-26 09:12:41 +0200
committerRichard Henderson2021-11-02 19:18:33 +0100
commit5fd6a3e23669444026f84f466a7ed402c203a84e (patch)
tree4d4810d8916ceb6e6b459830403f06bbcd796f19 /target/arm
parenthw/arm/virt: Rename default_bus_bypass_iommu (diff)
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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>
Diffstat (limited to 'target/arm')
-rw-r--r--target/arm/hvf/hvf.c7
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) {