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author | Paolo Bonzini <pbonzini@redhat.com> | 2020-09-22 06:43:17 -0400 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-09-22 06:43:17 -0400 |
commit | bf3c0e5e7102f5787d693379d9d384b813fe890b (patch) | |
tree | aa48fc57dee9ecdf99918affa38d1b06be41419a /arch/arm64/kvm/hyp/include | |
parent | 32251b07d532174d66941488c112ec046f646157 (diff) | |
parent | 976bc5e2aceedef13e0ba1f0e6e372a22164aa0c (diff) | |
download | linux-bf3c0e5e7102f5787d693379d9d384b813fe890b.tar.bz2 |
Merge branch 'x86-seves-for-paolo' of https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into HEAD
Diffstat (limited to 'arch/arm64/kvm/hyp/include')
-rw-r--r-- | arch/arm64/kvm/hyp/include/hyp/debug-sr.h | 60 | ||||
-rw-r--r-- | arch/arm64/kvm/hyp/include/hyp/switch.h | 39 |
2 files changed, 65 insertions, 34 deletions
diff --git a/arch/arm64/kvm/hyp/include/hyp/debug-sr.h b/arch/arm64/kvm/hyp/include/hyp/debug-sr.h index 0297dc63988c..5e28ea6aa097 100644 --- a/arch/arm64/kvm/hyp/include/hyp/debug-sr.h +++ b/arch/arm64/kvm/hyp/include/hyp/debug-sr.h @@ -21,70 +21,70 @@ #define save_debug(ptr,reg,nr) \ switch (nr) { \ case 15: ptr[15] = read_debug(reg, 15); \ - /* Fall through */ \ + fallthrough; \ case 14: ptr[14] = read_debug(reg, 14); \ - /* Fall through */ \ + fallthrough; \ case 13: ptr[13] = read_debug(reg, 13); \ - /* Fall through */ \ + fallthrough; \ case 12: ptr[12] = read_debug(reg, 12); \ - /* Fall through */ \ + fallthrough; \ case 11: ptr[11] = read_debug(reg, 11); \ - /* Fall through */ \ + fallthrough; \ case 10: ptr[10] = read_debug(reg, 10); \ - /* Fall through */ \ + fallthrough; \ case 9: ptr[9] = read_debug(reg, 9); \ - /* Fall through */ \ + fallthrough; \ case 8: ptr[8] = read_debug(reg, 8); \ - /* Fall through */ \ + fallthrough; \ case 7: ptr[7] = read_debug(reg, 7); \ - /* Fall through */ \ + fallthrough; \ case 6: ptr[6] = read_debug(reg, 6); \ - /* Fall through */ \ + fallthrough; \ case 5: ptr[5] = read_debug(reg, 5); \ - /* Fall through */ \ + fallthrough; \ case 4: ptr[4] = read_debug(reg, 4); \ - /* Fall through */ \ + fallthrough; \ case 3: ptr[3] = read_debug(reg, 3); \ - /* Fall through */ \ + fallthrough; \ case 2: ptr[2] = read_debug(reg, 2); \ - /* Fall through */ \ + fallthrough; \ case 1: ptr[1] = read_debug(reg, 1); \ - /* Fall through */ \ + fallthrough; \ default: ptr[0] = read_debug(reg, 0); \ } #define restore_debug(ptr,reg,nr) \ switch (nr) { \ case 15: write_debug(ptr[15], reg, 15); \ - /* Fall through */ \ + fallthrough; \ case 14: write_debug(ptr[14], reg, 14); \ - /* Fall through */ \ + fallthrough; \ case 13: write_debug(ptr[13], reg, 13); \ - /* Fall through */ \ + fallthrough; \ case 12: write_debug(ptr[12], reg, 12); \ - /* Fall through */ \ + fallthrough; \ case 11: write_debug(ptr[11], reg, 11); \ - /* Fall through */ \ + fallthrough; \ case 10: write_debug(ptr[10], reg, 10); \ - /* Fall through */ \ + fallthrough; \ case 9: write_debug(ptr[9], reg, 9); \ - /* Fall through */ \ + fallthrough; \ case 8: write_debug(ptr[8], reg, 8); \ - /* Fall through */ \ + fallthrough; \ case 7: write_debug(ptr[7], reg, 7); \ - /* Fall through */ \ + fallthrough; \ case 6: write_debug(ptr[6], reg, 6); \ - /* Fall through */ \ + fallthrough; \ case 5: write_debug(ptr[5], reg, 5); \ - /* Fall through */ \ + fallthrough; \ case 4: write_debug(ptr[4], reg, 4); \ - /* Fall through */ \ + fallthrough; \ case 3: write_debug(ptr[3], reg, 3); \ - /* Fall through */ \ + fallthrough; \ case 2: write_debug(ptr[2], reg, 2); \ - /* Fall through */ \ + fallthrough; \ case 1: write_debug(ptr[1], reg, 1); \ - /* Fall through */ \ + fallthrough; \ default: write_debug(ptr[0], reg, 0); \ } diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h index d64c5d56c860..0261308bf944 100644 --- a/arch/arm64/kvm/hyp/include/hyp/switch.h +++ b/arch/arm64/kvm/hyp/include/hyp/switch.h @@ -17,6 +17,7 @@ #include <asm/barrier.h> #include <asm/cpufeature.h> +#include <asm/extable.h> #include <asm/kprobes.h> #include <asm/kvm_asm.h> #include <asm/kvm_emulate.h> @@ -29,6 +30,9 @@ extern const char __hyp_panic_string[]; +extern struct exception_table_entry __start___kvm_ex_table; +extern struct exception_table_entry __stop___kvm_ex_table; + /* Check whether the FP regs were dirtied while in the host-side run loop: */ static inline bool update_fp_enabled(struct kvm_vcpu *vcpu) { @@ -142,10 +146,10 @@ static inline bool __translate_far_to_hpfar(u64 far, u64 *hpfar) * saved the guest context yet, and we may return early... */ par = read_sysreg(par_el1); - asm volatile("at s1e1r, %0" : : "r" (far)); - isb(); - - tmp = read_sysreg(par_el1); + if (!__kvm_at("s1e1r", far)) + tmp = read_sysreg(par_el1); + else + tmp = SYS_PAR_EL1_F; /* back to the guest */ write_sysreg(par, par_el1); if (unlikely(tmp & SYS_PAR_EL1_F)) @@ -508,4 +512,31 @@ static inline void __set_host_arch_workaround_state(struct kvm_vcpu *vcpu) #endif } +static inline void __kvm_unexpected_el2_exception(void) +{ + unsigned long addr, fixup; + struct kvm_cpu_context *host_ctxt; + struct exception_table_entry *entry, *end; + unsigned long elr_el2 = read_sysreg(elr_el2); + + entry = hyp_symbol_addr(__start___kvm_ex_table); + end = hyp_symbol_addr(__stop___kvm_ex_table); + host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt; + + while (entry < end) { + addr = (unsigned long)&entry->insn + entry->insn; + fixup = (unsigned long)&entry->fixup + entry->fixup; + + if (addr != elr_el2) { + entry++; + continue; + } + + write_sysreg(fixup, elr_el2); + return; + } + + hyp_panic(host_ctxt); +} + #endif /* __ARM64_KVM_HYP_SWITCH_H__ */ |