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spapr-rtas: add CPU argument to RTAS calls

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RTAS is a hypervisor provided binary blob that a guest loads and
calls into to execute certain functions.  It's similar to the
vsyscall page in Linux or the short lived VMCI paravirt interface
from VMware.

The QEMU implementation of the RTAS blob is simply a passthrough
that proxies all RTAS calls to the hypervisor via an hypercall.

While we pass a CPU argument for hypercall handling in QEMU, we
don't pass it for RTAS calls.  Since some RTAs calls require
making hypercalls (normally RTAS is implemented as guest code) we
have nasty hacks to allow that.

Add a CPU argument to RTAS call handling so we can more easily
invoke hypercalls just as guest code would.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Anthony Liguori 2013-06-19 15:40:30 -05:00 • committed by Alexander Graf
parent 159f8286b7
commit 210b580b10
8 changed files with 37 additions and 28 deletions
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4
hw/nvram/spapr_nvram.c
View file

@ -44,7 +44,7 @@ typedef struct sPAPRNVRAM {
#define DEFAULT_NVRAM_SIZE 65536
#define MAX_NVRAM_SIZE (UINT16_MAX * 16)
static void rtas_nvram_fetch(sPAPREnvironment *spapr,
static void rtas_nvram_fetch(PowerPCCPU *cpu, sPAPREnvironment *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)
@ -91,7 +91,7 @@ static void rtas_nvram_fetch(sPAPREnvironment *spapr,
rtas_st(rets, 1, (alen < 0) ? 0 : alen);
}
static void rtas_nvram_store(sPAPREnvironment *spapr,
static void rtas_nvram_store(PowerPCCPU *cpu, sPAPREnvironment *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)