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WHXP Removes the use of WHvGetExitContextSize 

The use of WHvGetExitContextSize will break ABI compatibility if the platform
changes the context size while a qemu compiled executable does not recompile.
To avoid this we now use sizeof and let the platform determine which version
of the struction was passed for ABI compatibility.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1519665216-1078-8-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Justin Terry (VM) via Qemu-devel <qemu-devel@nongnu.org>
This commit is contained in:
Justin Terry (VM) via Qemu-devel 2018-02-26 09:13:35 -08:00 committed by Paolo Bonzini
parent 2bf3e74de4
commit e2940978fc
1 changed files with 2 additions and 7 deletions
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9
target/i386/whpx-all.c
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@ -32,7 +32,6 @@
struct whpx_state {
uint64_t mem_quota;
WHV_PARTITION_HANDLE partition;
uint32_t exit_ctx_size;
};
static const WHV_REGISTER_NAME whpx_register_names[] = {
@ -899,7 +898,7 @@ static int whpx_vcpu_run(CPUState *cpu)
}
hr = WHvRunVirtualProcessor(whpx->partition, cpu->cpu_index,
&vcpu->exit_ctx, whpx->exit_ctx_size);
&vcpu->exit_ctx, sizeof(vcpu->exit_ctx));
if (FAILED(hr)) {
error_report("WHPX: Failed to exec a virtual processor,"
@ -1042,8 +1041,7 @@ int whpx_init_vcpu(CPUState *cpu)
}
}
vcpu = g_malloc0(FIELD_OFFSET(struct whpx_vcpu, exit_ctx) +
whpx->exit_ctx_size);
vcpu = g_malloc0(sizeof(struct whpx_vcpu));
if (!vcpu) {
error_report("WHPX: Failed to allocte VCPU context.");
@ -1300,9 +1298,6 @@ static int whpx_accel_init(MachineState *ms)
goto error;
}
whpx->exit_ctx_size = WHvGetRunExitContextSize();
assert(whpx->exit_ctx_size);
whpx_memory_init();
cpu_interrupt_handler = whpx_handle_interrupt;