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target/ppc/kvm: Add cap_ppc_safe_[cache/bounds_check/indirect_branch]

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Add three new kvm capabilities used to represent the level of host support
for three corresponding workarounds.

Host support for each of the capabilities is queried through the
new ioctl KVM_PPC_GET_CPU_CHAR which returns four uint64 quantities. The
first two, character and behaviour, represent the available
characteristics of the cpu and the behaviour of the cpu respectively.
The second two, c_mask and b_mask, represent the mask of known bits for
the character and beheviour dwords respectively.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
[dwg: Correct some compile errors due to name change in final kernel
 patch version]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Suraj Jitindar Singh 2018-01-19 15:59:59 +11:00 • committed by David Gibson
parent 9cbe305b60
commit 8acc2ae5e9
3 changed files with 88 additions and 0 deletions
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18
target/ppc/kvm_ppc.h
View file

@ -59,6 +59,9 @@ bool kvmppc_has_cap_fixup_hcalls(void);
bool kvmppc_has_cap_htm(void);
bool kvmppc_has_cap_mmu_radix(void);
bool kvmppc_has_cap_mmu_hash_v3(void);
int kvmppc_get_cap_safe_cache(void);
int kvmppc_get_cap_safe_bounds_check(void);
int kvmppc_get_cap_safe_indirect_branch(void);
int kvmppc_enable_hwrng(void);
int kvmppc_put_books_sregs(PowerPCCPU *cpu);
PowerPCCPUClass *kvm_ppc_get_host_cpu_class(void);
@ -290,6 +293,21 @@ static inline bool kvmppc_has_cap_mmu_hash_v3(void)
return false;
}
static inline int kvmppc_get_cap_safe_cache(void)
{
return 0;
}
static inline int kvmppc_get_cap_safe_bounds_check(void)
{
return 0;
}
static inline int kvmppc_get_cap_safe_indirect_branch(void)
{
return 0;
}
static inline int kvmppc_enable_hwrng(void)
{
return -1;