From ef8c640cb9cc865a461827b698fcc55b0ecaa600 Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Mon, 30 Jan 2017 21:21:43 +1100 Subject: KVM: PPC: Book3S HV: Use ASDR for HPT guests on POWER9 POWER9 adds a register called ASDR (Access Segment Descriptor Register), which is set by hypervisor data/instruction storage interrupts to contain the segment descriptor for the address being accessed, assuming the guest is using HPT translation. (For radix guests, it contains the guest real address of the access.) Thus, for HPT guests on POWER9, we can use this register rather than looking up the SLB with the slbfee. instruction. Signed-off-by: Paul Mackerras Signed-off-by: Michael Ellerman --- arch/powerpc/kvm/book3s_hv_rmhandlers.S | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/powerpc/kvm') diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index 264ac9ad4585..01f4392a284d 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -1715,6 +1715,10 @@ kvmppc_hdsi: /* HPTE not found fault or protection fault? */ andis. r0, r6, (DSISR_NOHPTE | DSISR_PROTFAULT)@h beq 1f /* if not, send it to the guest */ +BEGIN_FTR_SECTION + mfspr r5, SPRN_ASDR /* on POWER9, use ASDR to get VSID */ + b 4f +END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) andi. r0, r11, MSR_DR /* data relocation enabled? */ beq 3f clrrdi r0, r4, 28 @@ -1791,6 +1795,10 @@ fast_interrupt_c_return: kvmppc_hisi: andis. r0, r11, SRR1_ISI_NOPT@h beq 1f +BEGIN_FTR_SECTION + mfspr r5, SPRN_ASDR /* on POWER9, use ASDR to get VSID */ + b 4f +END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) andi. r0, r11, MSR_IR /* instruction relocation enabled? */ beq 3f clrrdi r0, r10, 28 -- cgit v1.2.3-55-g7522