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| author | Nicholas Piggin <npiggin@gmail.com> | 2022-01-22 11:55:30 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-01-25 06:39:41 +0100 |
| commit | 22f7ff0dea9491e90b6fe808ed40c30bd791e5c2 (patch) | |
| tree | 88931127028694933a1005e6c25c94d4ad75ce89 /arch/powerpc/include/asm | |
| parent | powerpc/perf: Fix power_pmu_disable to call clear_pmi_irq_pending only if PMI... (diff) | |
| download | linux-22f7ff0dea9491e90b6fe808ed40c30bd791e5c2.tar.xz linux-22f7ff0dea9491e90b6fe808ed40c30bd791e5c2.zip | |
KVM: PPC: Book3S HV Nested: Fix nested HFSCR being clobbered with multiple vCPUs
The L0 is storing HFSCR requested by the L1 for the L2 in struct
kvm_nested_guest when the L1 requests a vCPU enter L2. kvm_nested_guest
is not a per-vCPU structure. Hilarity ensues.
Fix it by moving the nested hfscr into the vCPU structure together with
the other per-vCPU nested fields.
Fixes: 8b210a880b35 ("KVM: PPC: Book3S HV Nested: Make nested HFSCR state accessible")
Cc: stable@vger.kernel.org # v5.15+
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220122105530.3477250-1-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_64.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 1 |
2 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h index fe07558173ef..827038a33064 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64.h +++ b/arch/powerpc/include/asm/kvm_book3s_64.h @@ -39,7 +39,6 @@ struct kvm_nested_guest { pgd_t *shadow_pgtable; /* our page table for this guest */ u64 l1_gr_to_hr; /* L1's addr of part'n-scoped table */ u64 process_table; /* process table entry for this guest */ - u64 hfscr; /* HFSCR that the L1 requested for this nested guest */ long refcnt; /* number of pointers to this struct */ struct mutex tlb_lock; /* serialize page faults and tlbies */ struct kvm_nested_guest *next; diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index a770443cd6e0..d9bf60bf0816 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -818,6 +818,7 @@ struct kvm_vcpu_arch { /* For support of nested guests */ struct kvm_nested_guest *nested; + u64 nested_hfscr; /* HFSCR that the L1 requested for the nested guest */ u32 nested_vcpu_id; gpa_t nested_io_gpr; #endif |