From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: [PATCH v3 02/75] KVM: SVM: Add GHCB Accessor functions Date: Tue, 28 Apr 2020 17:16:12 +0200 Message-ID: <20200428151725.31091-3-joro@8bytes.org> References: <20200428151725.31091-1-joro@8bytes.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20200428151725.31091-1-joro@8bytes.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" To: x86@kernel.org Cc: Juergen Gross , Tom Lendacky , Thomas Hellstrom , Joerg Roedel , Mike Stunes , Kees Cook , kvm@vger.kernel.org, Peter Zijlstra , Cfir Cohen , Joerg Roedel , Dave Hansen , linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Masami Hiramatsu , Andy Lutomirski , hpa@zytor.com, Erdem Aktas , David Rientjes , Dan Williams , Jiri Slaby List-Id: virtualization@lists.linuxfoundation.org From: Joerg Roedel Building a correct GHCB for the hypervisor requires setting valid bits in the GHCB. Simplify that process by providing accessor functions to set values and to update the valid bitmap. Signed-off-by: Joerg Roedel --- arch/x86/include/asm/svm.h | 61 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index f36288c659b5..e4e9f6bacfaa 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -333,4 +333,65 @@ struct __attribute__ ((__packed__)) vmcb { #define SVM_CR0_SELECTIVE_MASK (X86_CR0_TS | X86_CR0_MP) +/* GHCB Accessor functions */ + +#define DEFINE_GHCB_INDICES(field) \ + u16 idx = offsetof(struct vmcb_save_area, field) / 8; \ + u16 byte_idx = idx / 8; \ + u16 bit_idx = idx % 8; \ + BUILD_BUG_ON(byte_idx > ARRAY_SIZE(ghcb->save.valid_bitmap)); + +#define GHCB_SET_VALID(ghcb, field) \ + { \ + DEFINE_GHCB_INDICES(field) \ + (ghcb)->save.valid_bitmap[byte_idx] |= BIT(bit_idx); \ + } + +#define DEFINE_GHCB_SETTER(field) \ + static inline void \ + ghcb_set_##field(struct ghcb *ghcb, u64 value) \ + { \ + GHCB_SET_VALID(ghcb, field) \ + (ghcb)->save.field = value; \ + } + +#define DEFINE_GHCB_ACCESSORS(field) \ + static inline bool ghcb_is_valid_##field(const struct ghcb *ghcb) \ + { \ + DEFINE_GHCB_INDICES(field) \ + return !!((ghcb)->save.valid_bitmap[byte_idx] \ + & BIT(bit_idx)); \ + } \ + \ + static inline void \ + ghcb_set_##field(struct ghcb *ghcb, u64 value) \ + { \ + GHCB_SET_VALID(ghcb, field) \ + (ghcb)->save.field = value; \ + } + +DEFINE_GHCB_ACCESSORS(cpl) +DEFINE_GHCB_ACCESSORS(rip) +DEFINE_GHCB_ACCESSORS(rsp) +DEFINE_GHCB_ACCESSORS(rax) +DEFINE_GHCB_ACCESSORS(rcx) +DEFINE_GHCB_ACCESSORS(rdx) +DEFINE_GHCB_ACCESSORS(rbx) +DEFINE_GHCB_ACCESSORS(rbp) +DEFINE_GHCB_ACCESSORS(rsi) +DEFINE_GHCB_ACCESSORS(rdi) +DEFINE_GHCB_ACCESSORS(r8) +DEFINE_GHCB_ACCESSORS(r9) +DEFINE_GHCB_ACCESSORS(r10) +DEFINE_GHCB_ACCESSORS(r11) +DEFINE_GHCB_ACCESSORS(r12) +DEFINE_GHCB_ACCESSORS(r13) +DEFINE_GHCB_ACCESSORS(r14) +DEFINE_GHCB_ACCESSORS(r15) +DEFINE_GHCB_ACCESSORS(sw_exit_code) +DEFINE_GHCB_ACCESSORS(sw_exit_info_1) +DEFINE_GHCB_ACCESSORS(sw_exit_info_2) +DEFINE_GHCB_ACCESSORS(sw_scratch) +DEFINE_GHCB_ACCESSORS(xcr0) + #endif -- 2.17.1