diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2021-05-28 19:07:21 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-06-10 22:12:01 +1000 |
| commit | f36011569b90b3973f07cea00c5872c4dc0c707f (patch) | |
| tree | 91a9784a9f679ca50f8c51482b67e6c1549d975c /arch/powerpc/kvm/book3s_64_entry.S | |
| parent | 6ba53317d497dec029bfb040b1daf38328fa00ab (diff) | |
KVM: PPC: Book3S 64: move KVM interrupt entry to a common entry point
Rather than bifurcate the call depending on whether or not HV is
possible, and have the HV entry test for PR, just make a single
common point which does the demultiplexing. This makes it simpler
to add another type of exit handler.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Daniel Axtens <dja@axtens.net>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Acked-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210528090752.3542186-2-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_entry.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_entry.S | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_64_entry.S b/arch/powerpc/kvm/book3s_64_entry.S new file mode 100644 index 000000000000..7a039ea78f15 --- /dev/null +++ b/arch/powerpc/kvm/book3s_64_entry.S @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#include <asm/asm-offsets.h> +#include <asm/cache.h> +#include <asm/kvm_asm.h> +#include <asm/kvm_book3s_asm.h> +#include <asm/ppc_asm.h> +#include <asm/reg.h> + +/* + * This is branched to from interrupt handlers in exception-64s.S which set + * IKVM_REAL or IKVM_VIRT, if HSTATE_IN_GUEST was found to be non-zero. + */ +.global kvmppc_interrupt +.balign IFETCH_ALIGN_BYTES +kvmppc_interrupt: + /* + * Register contents: + * R12 = (guest CR << 32) | interrupt vector + * R13 = PACA + * guest R12 saved in shadow VCPU SCRATCH0 + * guest R13 saved in SPRN_SCRATCH0 + */ +#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE + std r9,HSTATE_SCRATCH2(r13) + lbz r9,HSTATE_IN_GUEST(r13) + cmpwi r9,KVM_GUEST_MODE_HOST_HV + beq kvmppc_bad_host_intr +#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE + cmpwi r9,KVM_GUEST_MODE_GUEST + ld r9,HSTATE_SCRATCH2(r13) + beq kvmppc_interrupt_pr +#endif + b kvmppc_interrupt_hv +#else + b kvmppc_interrupt_pr +#endif |