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hw/arm/virt: Support using SMC for PSCI

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If we are giving the guest a CPU with EL2, it is likely to
want to use the HVC instruction itself, for instance for
providing PSCI to inner guest VMs. This makes using HVC
as the PSCI conduit for the outer QEMU a bad idea. We will
want to use SMC instead is this case: this makes sense
because QEMU's PSCI implementation is effectively an
emulation of functionality provided by EL3 firmware.

Add code to support selecting the PSCI conduit to use,
rather than hardcoding use of HVC.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Message-id: 1483977924-14522-15-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2017-01-20 11:15:10 +00:00
parent 86830554db
commit 2013c5665c
2 changed files with 22 additions and 7 deletions
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2
include/hw/arm/virt.h
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@ -103,7 +103,7 @@ typedef struct {
uint32_t clock_phandle;
uint32_t gic_phandle;
uint32_t msi_phandle;
bool using_psci;
int psci_conduit;
} VirtMachineState;
#define TYPE_VIRT_MACHINE MACHINE_TYPE_NAME("virt")