linux-kernel - [PATCH 02/14] KVM: arm64: Define a macro for storing a value inside a per

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Date:   Mon, 14 Sep 2020 17:27:38 +0000
From:   George-Aurelian Popescu <georgepope@...gle.com>
To:     maz@...nel.org, catalin.marinas@....com, will@...nel.org,
        masahiroy@...nel.org, michal.lkml@...kovi.net
Cc:     linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
        clang-built-linux@...glegroups.com, james.morse@....com,
        julien.thierry.kdev@...il.com, suzuki.poulose@....com,
        natechancellor@...il.com, ndesaulniers@...gle.com,
        dbrazdil@...gle.com, broonie@...nel.org, maskray@...gle.com,
        ascull@...gle.com, keescook@...omium.org,
        akpm@...ux-foundation.org, dvyukov@...gle.com, elver@...gle.com,
        tglx@...utronix.de, arnd@...db.de,
        George Popescu <georgepope@...gle.com>
Subject: [PATCH 02/14] KVM: arm64: Define a macro for storing a value inside a per_cpu variable

From: George Popescu <georgepope@...gle.com>

Use the hyp_str_this_cpu assembly macro to store a value in a per_cpu
variable. This macro is designed to be used inside of the hyp code.

Signed-off-by: George Popescu <georgepope@...gle.com>
---
 arch/arm64/include/asm/kvm_asm.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h
index 6f98fbd0ac81..200bb8d0a720 100644
--- a/arch/arm64/include/asm/kvm_asm.h
+++ b/arch/arm64/include/asm/kvm_asm.h
@@ -211,6 +211,11 @@ extern char __smccc_workaround_1_smc[__SMCCC_WORKAROUND_1_SMC_SZ];
 	ldr	\reg,  [\reg, \tmp]
 .endm
 
+.macro hyp_str_this_cpu sym, reg, tmp1, tmp2
+	hyp_adr_this_cpu \tmp1, \sym, \tmp2
+	str	\reg, [\tmp1]
+.endm
+
 .macro get_host_ctxt reg, tmp
 	hyp_adr_this_cpu \reg, kvm_host_data, \tmp
 	add	\reg, \reg, #HOST_DATA_CONTEXT
-- 
2.28.0.618.gf4bc123cb7-goog