From: Yanan Wang <wangyanan55@huawei.com>
To: Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>,
"Quentin Perret" <qperret@google.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
<kvmarm@lists.cs.columbia.edu>,
<linux-arm-kernel@lists.infradead.org>, <kvm@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
"Suzuki K Poulose" <suzuki.poulose@arm.com>,
Gavin Shan <gshan@redhat.com>, <wanghaibin.wang@huawei.com>,
<zhukeqian1@huawei.com>, <yuzenghui@huawei.com>,
Yanan Wang <wangyanan55@huawei.com>
Subject: [PATCH v6 3/4] KVM: arm64: Tweak parameters of guest cache maintenance functions
Date: Wed, 16 Jun 2021 17:51:59 +0800 [thread overview]
Message-ID: <20210616095200.38008-4-wangyanan55@huawei.com> (raw)
In-Reply-To: <20210616095200.38008-1-wangyanan55@huawei.com>
Adjust the parameter "kvm_pfn_t pfn" of __clean_dcache_guest_page
and __invalidate_icache_guest_page to "void *va", which paves the
way for converting these two guest CMO functions into callbacks in
structure kvm_pgtable_mm_ops. No functional change.
Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
---
arch/arm64/include/asm/kvm_mmu.h | 9 ++-------
arch/arm64/kvm/mmu.c | 28 +++++++++++++++-------------
2 files changed, 17 insertions(+), 20 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index 25ed956f9af1..6844a7550392 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -187,10 +187,8 @@ static inline bool vcpu_has_cache_enabled(struct kvm_vcpu *vcpu)
return (vcpu_read_sys_reg(vcpu, SCTLR_EL1) & 0b101) == 0b101;
}
-static inline void __clean_dcache_guest_page(kvm_pfn_t pfn, unsigned long size)
+static inline void __clean_dcache_guest_page(void *va, size_t size)
{
- void *va = page_address(pfn_to_page(pfn));
-
/*
* With FWB, we ensure that the guest always accesses memory using
* cacheable attributes, and we don't have to clean to PoC when
@@ -203,16 +201,13 @@ static inline void __clean_dcache_guest_page(kvm_pfn_t pfn, unsigned long size)
kvm_flush_dcache_to_poc(va, size);
}
-static inline void __invalidate_icache_guest_page(kvm_pfn_t pfn,
- unsigned long size)
+static inline void __invalidate_icache_guest_page(void *va, size_t size)
{
if (icache_is_aliasing()) {
/* any kind of VIPT cache */
__flush_icache_all();
} else if (is_kernel_in_hyp_mode() || !icache_is_vpipt()) {
/* PIPT or VPIPT at EL2 (see comment in __kvm_tlb_flush_vmid_ipa) */
- void *va = page_address(pfn_to_page(pfn));
-
invalidate_icache_range((unsigned long)va,
(unsigned long)va + size);
}
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 5742ba765ff9..b980f8a47cbb 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -126,6 +126,16 @@ static void *kvm_host_va(phys_addr_t phys)
return __va(phys);
}
+static void clean_dcache_guest_page(void *va, size_t size)
+{
+ __clean_dcache_guest_page(va, size);
+}
+
+static void invalidate_icache_guest_page(void *va, size_t size)
+{
+ __invalidate_icache_guest_page(va, size);
+}
+
/*
* Unmapping vs dcache management:
*
@@ -693,16 +703,6 @@ void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
kvm_mmu_write_protect_pt_masked(kvm, slot, gfn_offset, mask);
}
-static void clean_dcache_guest_page(kvm_pfn_t pfn, unsigned long size)
-{
- __clean_dcache_guest_page(pfn, size);
-}
-
-static void invalidate_icache_guest_page(kvm_pfn_t pfn, unsigned long size)
-{
- __invalidate_icache_guest_page(pfn, size);
-}
-
static void kvm_send_hwpoison_signal(unsigned long address, short lsb)
{
send_sig_mceerr(BUS_MCEERR_AR, (void __user *)address, lsb, current);
@@ -1013,11 +1013,13 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
prot |= KVM_PGTABLE_PROT_W;
if (fault_status != FSC_PERM && !device)
- clean_dcache_guest_page(pfn, vma_pagesize);
+ clean_dcache_guest_page(page_address(pfn_to_page(pfn)),
+ vma_pagesize);
if (exec_fault) {
prot |= KVM_PGTABLE_PROT_X;
- invalidate_icache_guest_page(pfn, vma_pagesize);
+ invalidate_icache_guest_page(page_address(pfn_to_page(pfn)),
+ vma_pagesize);
}
if (device)
@@ -1219,7 +1221,7 @@ bool kvm_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
* We've moved a page around, probably through CoW, so let's treat it
* just like a translation fault and clean the cache to the PoC.
*/
- clean_dcache_guest_page(pfn, PAGE_SIZE);
+ clean_dcache_guest_page(page_address(pfn_to_page(pfn), PAGE_SIZE);
/*
* The MMU notifiers will have unmapped a huge PMD before calling
--
2.23.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-06-16 9:54 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-16 9:51 [PATCH v6 0/4] KVM: arm64: Improve efficiency of stage2 page table Yanan Wang
2021-06-16 9:51 ` [PATCH v6 1/4] KVM: arm64: Introduce cache maintenance callbacks for guest stage-2 Yanan Wang
2021-06-16 13:21 ` Marc Zyngier
2021-06-17 6:48 ` wangyanan (Y)
2021-06-17 8:03 ` Marc Zyngier
2021-06-17 8:22 ` wangyanan (Y)
2021-06-17 8:44 ` Marc Zyngier
2021-06-17 9:43 ` wangyanan (Y)
2021-06-17 10:43 ` Marc Zyngier
2021-06-18 8:50 ` Fuad Tabba
2021-06-16 9:51 ` [PATCH v6 2/4] KVM: arm64: Introduce mm_ops member for structure stage2_attr_data Yanan Wang
2021-06-16 9:51 ` Yanan Wang [this message]
2021-06-16 9:52 ` [PATCH v6 4/4] KVM: arm64: Move guest CMOs to the fault handlers Yanan Wang
2021-06-17 8:00 ` Marc Zyngier
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210616095200.38008-4-wangyanan55@huawei.com \
--to=wangyanan55@huawei.com \
--cc=alexandru.elisei@arm.com \
--cc=catalin.marinas@arm.com \
--cc=gshan@redhat.com \
--cc=james.morse@arm.com \
--cc=julien.thierry.kdev@gmail.com \
--cc=kvm@vger.kernel.org \
--cc=kvmarm@lists.cs.columbia.edu \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=maz@kernel.org \
--cc=qperret@google.com \
--cc=suzuki.poulose@arm.com \
--cc=wanghaibin.wang@huawei.com \
--cc=will@kernel.org \
--cc=yuzenghui@huawei.com \
--cc=zhukeqian1@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).