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authorLinus Torvalds <torvalds@linux-foundation.org>2015-04-16 13:58:29 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-16 13:58:29 -0500
commit714d8e7e27197dd39b2550e762a6a6fcf397a471 (patch)
treebc989a2a0e14f21912943e56d0002a26a2b7793e /arch/arm64/include/asm/kvm_mmu.h
parentd19d5efd8c8840aa4f38a6dfbfe500d8cc27de46 (diff)
parent6d1966dfd6e0ad2f8aa4b664ae1a62e33abe1998 (diff)
downloadblackbird-op-linux-714d8e7e27197dd39b2550e762a6a6fcf397a471.tar.gz
blackbird-op-linux-714d8e7e27197dd39b2550e762a6a6fcf397a471.zip
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon: "Here are the core arm64 updates for 4.1. Highlights include a significant rework to head.S (allowing us to boot on machines with physical memory at a really high address), an AES performance boost on Cortex-A57 and the ability to run a 32-bit userspace with 64k pages (although this requires said userspace to be built with a recent binutils). The head.S rework spilt over into KVM, so there are some changes under arch/arm/ which have been acked by Marc Zyngier (KVM co-maintainer). In particular, the linker script changes caused us some issues in -next, so there are a few merge commits where we had to apply fixes on top of a stable branch. Other changes include: - AES performance boost for Cortex-A57 - AArch32 (compat) userspace with 64k pages - Cortex-A53 erratum workaround for #845719 - defconfig updates (new platforms, PCI, ...)" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (39 commits) arm64: fix midr range for Cortex-A57 erratum 832075 arm64: errata: add workaround for cortex-a53 erratum #845719 arm64: Use bool function return values of true/false not 1/0 arm64: defconfig: updates for 4.1 arm64: Extract feature parsing code from cpu_errata.c arm64: alternative: Allow immediate branch as alternative instruction arm64: insn: Add aarch64_insn_decode_immediate ARM: kvm: round HYP section to page size instead of log2 upper bound ARM: kvm: assert on HYP section boundaries not actual code size arm64: head.S: ensure idmap_t0sz is visible arm64: pmu: add support for interrupt-affinity property dt: pmu: extend ARM PMU binding to allow for explicit interrupt affinity arm64: head.S: ensure visibility of page tables arm64: KVM: use ID map with increased VA range if required arm64: mm: increase VA range of identity map ARM: kvm: implement replacement for ld's LOG2CEIL() arm64: proc: remove unused cpu_get_pgd macro arm64: enforce x1|x2|x3 == 0 upon kernel entry as per boot protocol arm64: remove __calc_phys_offset arm64: merge __enable_mmu and __turn_mmu_on ...
Diffstat (limited to 'arch/arm64/include/asm/kvm_mmu.h')
-rw-r--r--arch/arm64/include/asm/kvm_mmu.h33
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index 36250705dc4c..61505676d085 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -68,6 +68,8 @@
#include <asm/pgalloc.h>
#include <asm/cachetype.h>
#include <asm/cacheflush.h>
+#include <asm/mmu_context.h>
+#include <asm/pgtable.h>
#define KERN_TO_HYP(kva) ((unsigned long)kva - PAGE_OFFSET + HYP_PAGE_OFFSET)
@@ -269,5 +271,36 @@ static inline void __kvm_flush_dcache_pud(pud_t pud)
void kvm_set_way_flush(struct kvm_vcpu *vcpu);
void kvm_toggle_cache(struct kvm_vcpu *vcpu, bool was_enabled);
+static inline bool __kvm_cpu_uses_extended_idmap(void)
+{
+ return __cpu_uses_extended_idmap();
+}
+
+static inline void __kvm_extend_hypmap(pgd_t *boot_hyp_pgd,
+ pgd_t *hyp_pgd,
+ pgd_t *merged_hyp_pgd,
+ unsigned long hyp_idmap_start)
+{
+ int idmap_idx;
+
+ /*
+ * Use the first entry to access the HYP mappings. It is
+ * guaranteed to be free, otherwise we wouldn't use an
+ * extended idmap.
+ */
+ VM_BUG_ON(pgd_val(merged_hyp_pgd[0]));
+ merged_hyp_pgd[0] = __pgd(__pa(hyp_pgd) | PMD_TYPE_TABLE);
+
+ /*
+ * Create another extended level entry that points to the boot HYP map,
+ * which contains an ID mapping of the HYP init code. We essentially
+ * merge the boot and runtime HYP maps by doing so, but they don't
+ * overlap anyway, so this is fine.
+ */
+ idmap_idx = hyp_idmap_start >> VA_BITS;
+ VM_BUG_ON(pgd_val(merged_hyp_pgd[idmap_idx]));
+ merged_hyp_pgd[idmap_idx] = __pgd(__pa(boot_hyp_pgd) | PMD_TYPE_TABLE);
+}
+
#endif /* __ASSEMBLY__ */
#endif /* __ARM64_KVM_MMU_H__ */
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